Military Surplus rigs AN-ARR-15A Service guide

Sacfion

I

Porogrophs 6-ll AN l630ARRl5-3

AUDIO OUTPUT CHARACIERISTICS.

6.

ditions
formanee

r^.rdio output is consistent at 500 milliwatts

The
maxirnum with avc and
r-f inputs of 10 to
modulated,
tortion.

plus

than

1000

at

the

The

or. minus three db relative

for modulation

cps

cps. The maximum

300 cps

provided
1600
within three

and

above 3500 cps. The low

for

cw reception

cps from 1200

db

10,000 microvolts,

output

audio

response does not

attenuation

cps

from 1200 cps

noise limiter

will contain

frequencies

is

down

reference

to

action. With

per

30

vary

response

of 300

pass

less

more

to

filter

157o or

to the

is

attained below

30 db or more at

frequency and

cps.

300

cent

dis-

3500

encountered in

9. POWER

from a 26.5
voltage
affect the

drain does

during
amp€res
mechani.sm.

7. WPES

Voice, cw or mcw
this
receiver

ception.
and should be operated
when it is
When voice modulated or
the beat
avc circuit
variable
headphones. If cw reception
partially

the

OF

equipment.

perrnits

This

desired

frequency

is

"T"

disabled, the

outtrlut circuit,

audio

RECEPTION.

signale

A control on

the selection

control

is designated

may be received w.ith

panel

front

the

of the tlpe

CW-MCW-CAL

to the MCW-CAL

to receive

voice or mcw

mcw reception

is selected,

oscillator circuit is disabled,

connected so as to be operative

pad

is

used

"T"

to

control the input. to

is

selected, the

pad

is

disconnected fiom

and

potentiometer

a

position

nected in the cathode circuit of the r-f amplifier
first

and second
to control the
are

operated

i-f amplifier tube circuits,

gain.

Both

by the volume

"T"

pad

control.

and

potentiometer

of the

re-

of

signels.

the

and a

the

avc

con-

and

is used

is

cluded in
surge is

IO. TYPE

The

operate
circuits
in frequency,
indicate
The controls
electrically.
TUNE system
channels
lockeC.

trically to
the
the

are the

will

SOURCE

This

equipment

plus

of

operation

not

warm-up

during

the

approximately

OF

tuning

all

of the

the frequency

may be

The

any

channel

equipment.

limiting factors.

be

obtained

aircraft radio

under

operation.

REQUIREMENTS.

has

been designed

volt

d-c

supply.

or

minus 70%

of the

exceed

and reception
operation

Dynamotor

above

figures.

three

A

equipment.

and

or

of the

starting

Dynamotor

15 amperes.

CONTROI.

controls located

preselection

and conversion

on

receiver. Appropriate

ar€ associated with

may be
This

equipment

to which

operated either

the receiver

employs

of channel selgction.

manually selected

controls

may then be repositioned

one of the ten channels

selectiag

switch on the front

The

required per-

normal

variation

wil

not

The

one-tenth

eight

and one-half

channel

surge

the front

dials,

these

manually

the AIIIO-

Ten frequency

and the

by

conditions

to

operate

of the

materially

current

amperes

selecting

is not

starting

panel

oscillator

calibrated

controls

is

tuned.

controls

elec-

operating

panel

in-

to

or

of

8. SUCCESSFUT

OPERATING IIMITS.

a. TEMPERATI]RE.

This equipment
peratures
to

(-22'T),
should
or

operating

withiu range of

+140"F).

a 20 minute warrn-up

allowed

be

the

b. ALTTruDE.

This equipment will

to an

altitude of

c. DISTANCE.

The

distance

will

be determined by the

time

operating

of

time of operating,

t-2

40,000 feet

is

designed to operate at tem-

-40'C

to

{60'C

At temperatures below

before

channel

period

making

selecting

in

any adjustments

mechanism.

operate satisfactorily up

above sea level.

limits

(day

frequency

this

of

conditions

night).

or

receiving

The

and

many other

equipment

existing at the

interference,

(--40'F

-30"C

still air

con-

Note

The
OFF

last

operator that

switch to

rotates

the ON

position

his

power

will

control of the eouinment.

ANTENNA.

II.

This equipment has
fixed aircraft antenna ranging from 17 feet

a
feet

in

length,

which is also used

been designed

to operate with

for

transmission.
The transmitter used with this receiver
a suitable change over

receivet

antenna connection

A spring type binding

of the front

edge

nection

for

the equipment.

A spring type binding

of

edge

nection for the

the front

equipment.

relay, which

during

post,

located near

panel, provides

post,

located

panel, provides

Revised 15

will

transmission.

the antenna con-

near

ground

the

October

ON-

have

40

to

should have

ground

the

the upper

the lower

con-

1947

1
I

r6-30ARR|5-3

AN

Se:tion

Porogroph

I

12.o.

Figure

I2"

MECHANICAL

l-2.

CHARACTERISTICS.

o. MECHANICAL

(1)

RADrO
NAMOTOR
BASE

are
cabinet
shock
installed
two
apart
to
to fasten

mounting
to

MT-461,/ARR-15.

The

receiver

contained

has

been designed

reducing

as an integral part

main sections

by live

have

access

the unit

base.

loosened

or

rubber

or loosening
equipment.
on

the rear

ment is

the

mounting
nections
nections.

on the

is

attached
tion that
affecting
Iation
to

section

be followed

A multiterminal

of the

fastened

to

the

In

receiver,

to the

is caused

the

operation

ceiver.

No external

set of

headphones
are necessary
control.

position

a
tional
duplicates

If

it is

some

controls

of

the
r.eceiver panel.
positions

Revised

may

l5

October

Receiyer

AND

ELECTRICAT

DESCRIPTION.

RECETVER

DY-34/ARR-15

and

dynamotor

in

a single

base.

The

of the

cushions.

to the

front

of the

to

or remove

The

equipment

from

the

mounting

two

wing

nuts

receiver

to

base

makes

the

chassis.

mounting

equipment

addition

a spring

to

the

and

dynamotor

by

operation

of

the receiver.

of this

for

handbook gives

the

mounting

equipment

aad

a 26.5

to

complete

desired

distance

are

to

from

necessary.

controls

Any

number

be used

with

1947

Unit R-l05/ARR-15

R_105/ARR_15.

and MOUNTING

power

cabinet.

to mount

base is

of the

mounting

The

on

a detachable

designed

aircraft.

base are

is

onlv necessarv

It

equipment in

tire unit from

may

be

base

by

tightening

the

on

receptacle

all of

except

shock

rubber

to

front

is mounted

When

base

the

the

the electrical

the

antenna

reducing

cushioned

prevent

of the

the vibra-

dynamoror,

The instal-

procedure

the

of

the

baie and

except

volt d-c

the

installation

control

the

that

are

this

an

power

the

receiver

installation,

These

controls

mounted

of

remote

equipment

antenna,

Dy_

supply

receiver

to be

held

order

fastened

of the

equip-

plug

con-

con­base
base

source

panel

for

from

addi-

on

control

by

con-

The

the

on

re-

are
the

a

Figure

necting
lel
Remote
and

the

with

control

no

mechanical

those

installation.

This
TUNE
TUNE

method

system
mechanically
as

tap

switches,
inductors
nation
several
In

this
are
channels
the
operate
that
ture
Lower

to

of these items

frequency

particular

available.

may

receiver

to select the frequency

will not

and

with a normal

temperature
combination
the

time necessary
accuracy
and is

of

not
temperature
the

adjustment

Refer to
justments,

changing

page

for

a frequency

Every

this

equipment

that

is

required for
components
are

accessible

the

receiver

l-3.

Mounting

controls

at the remote

mounted

of the receiver

linkages

receiver

of frequency

is an

electrically

repositioning

variable

predetermined

chanels

equipment

Any one

be selected

panel.

Base

on the

is

are necessary

is equipped

selection.

controlled

adjustable

capacitors

settings.

may

be tuned

by use

ten frequency

of these

by operating

The AUTOTUNE

channel in

exceed seven

seconds

suppiy voltage

lower

or

source

of both will result

to

shift frequency

repositioning is

seriously

afiected

changes.

of the

2-10

Section

procedure

the

of

by wear, humidity

No tools

AUTOTUNE

II,

Paragraph

to be followed

channel.

effort has

to reduce to

been made in the design

a minimum the

the repair

within

is

the receiver.

either

from

the sides or bottom u.'hen

removed from the cabinet.

Mf

-461/ARR-I

position

receiver

entirely

with the

5

paral-

in

panel.

electrical

for

the

AUTO-

The AUTO-

means

elements

and

such

variable

Any combi-

to any

one

of this system.

channels

ten frequency

a switch

system will

period

a

room

at

in

voltage

increase

an

tempera­(26.5

v).

or a

channels. The

a very high order

are necessary for

mechanism.

2.

c. Ad-

when

tirne

replacement

or

All

components

The

l-3

of

of

on

in

or

of

of

Sectisn I
Porogrophs 12.a.-12.b. AN

l6-30ARRr5-3

components

accessible

on

built

been

mounted on

units that
are

may be

the cfi unit,

dynamotor

fasteners

the

in

assemblies that could

portions

into sub units

of the receiver

plug

that

the main receiver chassis.

removed

relay unit line

With the

unit.

on the dynamotor

EXC

I TER

from the

receiver

are accessible from

IST

AI'JPL IF

fllter

cabinet

not

mounted

be

chassis

have

into receptacles

The four

main assembly

unit and the

removed,

IF

IER

2XD IF
AMPLIFIER

top of the

the
connection

receiver.

to

the antenna

minal connector
rear of the mounting

through

rnade
plug

on the receiver

ceptacle

mounting

the

O ETECTOR

when

x0tsE

LIMITER

the

tlle

rack.

All connections

are made

plug

receptacle mounted

rack.

connector

Ground connections are

plug.

is inserted into

AUOIO

YER

DR I

is

receiver

to a

The

secured

TPUT

OU

AUOIO

AI,{PLIFIER

except the

multiter-

on the

connector

plug

the

place

in

re-

on

Figure l-4. Receiver

b. ELECTRICAL

receiver employs a

The
cuit and will
voice and

dynamotor

a

source.

the

mcw signals. All of the

The dynamotor

receiving tubes.

(1)

RF

receive cw and amplitude

operate

AND IF AMPLTFTER

DESCRII{NON.

superheterodyne cir-

from

the 26.5 volts

furnishes

tube heaters and

high

CIRCUITS.

The superheterodyne circuit employs one
stage
fication.
tune
The variable
used only

When the

desired
transformers
frequency, as used

bration and
have

quency

kc

100

signal

ing actual

amplification and two

r-f

of

i-f

The

to frequencies

transformers are variable

in the range 450

characteristic

during

the calibrating

receiver has been

receive a transrnitted

to

arg adjusted so that

for reception,

excitation

been incorporated

of one
quartz

are used

oscillator

crystal. Harmonics

when calibrating

reception

this

stages of

these

of

transformers

of the receiver.

calibrated and it is

signal,

the intermediate

is

purposes
in this

circuit

500 kc.

three
receiver.
is

determined

of this 100

the

receiver.

oscillator

is

modulated

power

d-c

voltage

i-f

ampli-

and will

to 550 kc.

the

For

cali-

oscillators

The fre-

by

Dur-

disabled

lor

if

kc

by

Block Diagram

removing the
oscillator tube.

The

ceiver

is

separately excited.

frequency

tube. This
range 2000
circuit is

used
citation voltages.
essentially

during

used

output of

is

450 to

signals are

cillator

550 kc. When voice modulated

circuit. is disabled by removing

and screen voltage from

the variable

of
built, mechanically
is very stable

temperature

and

(2)

a

AUDIO

DETECTOR,

AMPLIFIER

In

the

circuit employs a fixed

plate

and

screen voltages from

frequency

converting stage of

One of the variable

oscillators is

oscillator

to

3000 kc and a

used to excite

the rnixer

operates in the frequency

frequency

multiplier

to obtain the higher frequency

The remaining

a beat frequency oscillator,

the

caiibration of the receiver.

oscillator

but is

this oscillator is in the frequency

or

being received, the beat frequency

the

the

frequency

and

electrically,

under extreme

oscillator

oscillators

conditions

tube.

preclsion

are

and their

humidity

of

change.

AVC, NOISE

LIMITER AND

CIRCUITS.

R-105/ARR-15 Receiver.

crystal detector

detector

the

unit. Two

the

this re-

ex-

tube is

also
The

range

mcw

os-

plate
Both

output

t-4

Revised

I

Februory

1949

I6.3OARRI5.3

AN

Porogrophs

Section

12.b.-13

I

diode

and

limiter.

noise

the R-105A/ARR-15 Receiver,

circuit employs

A dual

two difterent

The

two triodes are balancer tubes

dual diode

dual triode is

of the

output

POWER

tube

across

furnishes
section

volt

REMOTE

equipment

control

dual

the other

stages

for

SUPPLY

filaments

power

the

by the

of

power

d-c

CONTROL

a dual triode,

The dual triode

one-haU of

diode and

dual triodes are used

functions

used to

triode

section is

of audio

the

as the

supply avc

'is

used in a trigger

used to

amplification

operation

CrRCUrlfS.

are connected

source.

power

unit

source.

the

high

voltage to the tubes.

the d5mamotor

source.

CTRCUITS.

has facilities

for

remote

of receiving

the

(diode

a dual

connected).

tubes,
for
tube while the dual diode functions as the
limiter tube. In

detector

each of
noise limiter.
while the

tube. A
one section
circuit while
avc voltage. Two
vide ample

(3)

The
parallel
are

energized
motor unit
The motor

26.5

the

(4)

This
of a remote
and remote selection

necessary

are

is a balancer

a dual triode

a section

noise limiter

supply the

of headphones.

in series

The

relay coils

plug-in

A

operates

for

connection

power

channels. The

noise

the

from

for

the

voltage,

pro-

dyna-

from

control

remote circuits should be
within the
units may be used since only one remote
can have control of
vided

power

(ON-OFF)

can be turned off
pulse.

remote control desiring control over the equipment.

I3.

PURPOSE

This radio set has been

Specification JAN-T-152.

The
the
subjected
mally
accomplish the following:

o. To

b. To
low
surface

c. To

d. To aid

e. To

receiver.

remote

the

switch

The electrical

purpose

equipment

encountered.

moisture absorbing

electrical

retard t}re

prevent

in the receiver. The

in the

OF TROPTCATIZATION TREATMENT.

to moisture and

render

envelop

in

Any

t}'e

power

receiver is a special
manually or

of the tropicalization

protect

is to

This treatment

the surfaces moisture-resistant..

terrninals and connections

leakage and

absorption of moisture.

retarding

gro\rth

the

similar

number

equipment

switch

impulse

tropicalized as

the

fungrrs conditions nor-

filrn

and

arc-over.

corosion.

of fungi.

to

of remote

at

one

is identical

power

an

by
is furnished

treahnent

equipment

is intended

thereby minimize

the circuits

control
controi

time,

to
switch

switch

electrical

which

by the

outlined in

with

pro-

the

im-

given
when

to

a

Revised

l February

1949

l-5

Section ll

AN l6-30ARRI5-3

f

Radio Receiver

R-105/ARR-15

\

\!.

2-O

Figure

2-1 .

Rodio Sef

AN/ARR-I

Headset

s-lnstallation

H-1IAR or

Equal

t6-30ARRt5-3

Seciion

Porogroph

tt

l.o.AN

sEcTloN

INSTALLATION

I. INSTALTATION.

o. PRELIMINARY.

(1)

UNPACKiNG.

equipment for

supplied by the contractor is in one crate.

equipment consists

mounting

tached
with arrows to indieate
move
material
ail the
each unit
that all controls
properly.
promptly
claim
case and
the equipment
MENT
1-1).

PLUG-IN UNITS.-Loosen the receiver unit from
the
protrudes
the receiver unit from
forward. With the unit
check all of the vacuurn
proper

(Refer
Make
fastened.

OPERATION. - Unlock the AUTOTUNE
nism that operates
control by rotating each locking key
in

a counterclockwise direction.

by rotating

of the
through the entire range.

BRATE control. Turn
to the CW

Turn the
release

base,

the mounting

to

the

crate cover

and

packing

for loose

AIl claims for

with

for damage is

packing

SUPPLIED

(2)

CTTECKTNG VACUUM TUBES AND

cabinet

(3)

Do not force the controls
controls
minimum
etc.

by disengaging the Dzus fastener that

through the

tubes are securely inserted
to figure

that

sure

CHECKING CONTROLS FOR

it through

Check the

positions.

six

position

ON-OFF switch to

it to

the

Radio Set

lhe

and

lift

the units out carefully. Search

material for

such

the transportation company. If a

material must be

received

2-2

all the

the

not

do

pressure,

BAND

OFF

(See

fisure

AN/ARR-15 which

of a receiver unit, a receiver

power

a

base. lf the crate is marked

only. Remove

screws and bolts. Be certain

as

be filed,

to

(Section

rear of the cabinet.

tubes to be certain

for the location

BAND

the entire

CAUTION

operate satisfactorily with

check

switch

Rotate

the

and to the MCW-CAL.position.

position

connector to be at-

upright

the

small

switches,

damage

the original

against the table EQUIP-

1,

the cabiaet by
removed from the cabinet

plug-in

switch and TUNING

to rotate. If

by turning

the TUNING

Rotate

CW-MCW-CAL

the

by

J-l)-All

This

position,

packing

the

packages.

dials,

should

preserved.

paragraph

in

of the tubes.)

units are firmly

two revolutions

Check each control

range.

for

bent

the BFO-CALI-

ON

pressing

Inspect

etc.,

be

packing

2,

Remove

pulling

that

sockets.

the

PROPER

mecha-

the

parts,

it to each

control

switch

position

the knob

work

filed

Check

page

and

the

re-

the

ll

AND ADJUSTMENT

toward

Rotate

the ten channels.

is

it

controls,
it

all the

(4)

been

designed to operate
source.
in

a series-parallel circuit across the

The

dynamotor, AUTOTUNE motor and relays
operate
equipment
10lo

below 26.5
input voltage should

volts
vacuum tubes. Low voltages may result in insuffi-

cient emission from

low

voltage the time required

will be longer.

MENT REQUIRED BUT NOT

receptacle

of non-inductive resistance and a 100
in

series.

a milliwattmeter or a 15 voit meter
enough resistance
the

receiver.)

equivalent.)

installations
to

make up a test bench
be checked before
Considerable time and labor
units
being installed.
test

beneh, setup.)

leads.
the

terminals numbered

wire

for all the control

panel.

the

the CHANNEL

After

as

(c)

are

checking
replace the receiver
way in and engage the Dzus fastener.

BENCH TEST.

(a)

POWER SOURCE.-This

The filaments of the tubes are connected

directly

will operate with voltages LI/o above

possible.

(b)

TNSTRUMENTS, TOOLS

7. 26-5 volt d-c supply.

2.

Wire

(J-901).

A set

3.

4. A

500 ohm

5. A single-pole, single-throw

6. A dummy

7. Audio output

8.

Signal

TEST

are being made at one base it is

checked

number 14

Use

n'.rmber

IJse

Operate the VOLUME

selector switch

the tubes,

from a 26.5 volt d-c

from

the 26.5 volt supply. The

volts

but

be maintained as close to 26.5

High voltages

the

vacuum tube cathodes.

for

connecting

headphones

of

variable resistor.

antenna

meter.

to

match the

generator. (TS-413iU,

BENCH SET'UP.-I{ a number

so that

being mounted

and

operating

(Refer

18

gauge

to

figure

gauge

4 and 10.

leads.

plug-in

in

the cabinet,

equipment

for

the best results

may damage the

change

to

AND EQUIP-

SUPPLIED.

power

(approx.

consisting of 10

mmf capacitor

(A

300 ohm

each

equipment may

in the aircraft.

may be saved if all

properly

2-3

for

for

wire

for

wire

the leads from

Use

control.

to

each

units

power

power

source to

Weston 687,

input.

channels

300 ohm).

switch.

shunted by

ou\>ut

LP-4

desirable

before

a suggested,

power

the

number 22

of

and

push

has

or

the

With

plug

ohm

of

or

of

Revised l5

October 1947

2-l

Seclion

ll

r2A6

v-I0I

* tzsJ7

v-t

o7

t2 H6

v-lto

r2sL7

v-t 05

AN l5-30ARRl5-3

r2sG7

v-tol

l2sG7

v-to2

l2sL7

v-t0

r2sG7

v-ro4

tzsc7

v-r03

t2sJ7

v-20

6

t2sG7

v-t

o9

zl

-t

l)

/\

ll

|

t,

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t2sJ7

v-301

!

\,-,

t2sJ7 v40l

2-2

*

I2SL7

IN

ARR-IsA

Figure 2-2. Tube

Plocement

Diagram

Revised I February

1949

o

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6F

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=a

uF

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ir;

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RECE

IVE

Figure 2-3. fesf Eenclr

'

Set-Up

,J

)6

085

(Lzo

F(J

-o

2-3

Section ll
Porogrophs

procedure
the operation of the equipment.

terminals on the receptacle at the rear
ing

base.

the ANTENNA terminal on the
the

dummy antenna.

1000 cps.)

output circuit.
or by
unit.) If the voltmeter is
calculate the

Power

frequency

postion.

far

as

as

far

it

as

mum output. Check receiver
the

sensitivity and selectivity

12.5,

15.0 and 18.1 mc.

(e)

and
erator to the above frequencies,
output and observing
chosen

(e)

FORMANCE.

measurement are:
vanced, signal
PHONE reception
not in
antenna consisting
sistor
output

frequency

be found in

receiver
within the maximum and minimum limits
below.
agraph

DB BGl,ow

excess of

and a 100 mmf

Attenuation

l.c.-1.b.

(d)

TEST PROCEDURE.-The following test

will reveal any damage that wili affect

I.

Connect the

(See

2.

3" Connect the output meter

connecting to

Jigure

Connect the signal

(Either

power

power

2-3.)

(Signal

through the

terrrinals

by using the following formula:

source to the

generator

modulated

on the rear of

used with

of

receiver through

to the receiver
PHONES

300

(milliwatts) =;:1"t"'.

4. Turn the
generator

of the

5.

Rotate the

6. Rotate the

it

7. Rotate the

will

8. Rotate the BAND

9.

I0. Adjust the

2. below.

output.

.1.

of

2.
at

(Conditions

(e)

go.

will

go.

Turn

the

CW-MC1tr-CAL to MCW-CAL.

Check by setting

MINIMUM

SENSITI\ITY.

modulated

with a rf input to the

five

microvolts

of a

100 milliwatts shall
with an input

The method

paragraph

SELECTIVITY.-The

18.1 megacycles per

the same

7.):

REsoiance

6
20
40
60

generator

signal

at 2.0

ON-OFF switch

VOLUME

SENS control

switch to A.

TUNING control for

operation

al 2, 2.5,3.5,

Refer to Paragraphs

input

the

ACCEPTABLE

The

-

VOLUME control

percent

30

10

ohm

capacitor in

five

of

of measuring

(3) (e)

1.d.

as

Kilocycles

Maximum

--eJ-

on and set the

mc.

control clockwise

the signal

tuning for

necessaqr

conditions

and using a dummy

non-inductive

series. An

obtained

be

microvolts.

sensitivity

page

on

selectivity

second

stated

above in

Off Resonance

L2.5

22.5

30.0

clockwise

by checking

at 1000

2-4

AN

proper

the

mount-

ou@ut to

30/o at

jack

the

ohm shunt,

to the ON

maxi-

8.5,

5.5,
(e)

gen-

maximum

give

to

PER-

fully

ad-

cps,

equipment

re-

audio

any

at

may

5-2.

of the

shall

fall

set forth

Par-

Minimum

--7s-

7.5

J.A

J.a

t6-30ARR|5-3

is as

the.recommended
itor
of the

(with

nals

BFO turned

output

the

generator
generator
receiver

the test frequency

of
meter reads the desired
indicated

indicated by the signal

as

1.

of

with

table above

fully checked and aII units are
satisfactorily,

performance

the
ceptable
fer to
attempt

performance

of
obtain

a

controls,
sonnel

b.

FOR

least one-half inch must be allowed
at the

shock

front of the

in

adjusting
adjusted
craft,
provided
removing
ance of
necessary
from the shock mount if

rear of the

the
behind
come
enough

permit

to

(2)

MOIINTING

The

method

follows:

a. Connect

dummy

in series

a db

of

the Kilocycles

page

RECETVER INSTALLATION PROCEDURE.

(1)

UNIT.

top for
mount. A

a minimum clearance

through the rear of

with

10

ohms) to the antenna

receiver.

b. Connect

meter

the

receiver.

c.

of the signal

d. Apply

and turn

output to

AVC

e. Tune

in

f.

performaace

to adjust the

the required

turn

for servicing.

SELECTTNG MOUNTING

the

after t}.e receiver

in

the unit

at least four inches

for

the

receiver

space

placing

PLACTNG AND SECURING THE

incorporated)

Turn the equipment

on, tune

starts to operate.

the

Read the kilocycles-off-resonance as

When the equipment has

it'may

2-11 Paragraph 2.e.

the urrit over to the maintenance

(See

the

receiver shouid

conhols.

front of

the

either

BASE.

the receiver to

30% modulation to the signal

the BFO

just

the signal

table

above.

Off Resonance

be installed

does not meet the minimum

standards outlined above, re-

controls

car

be

performance

figure

foee

minimum

from the mounting base. A clear-

removal

plug.

is sufiicient

in front of or

the unit on the mounting base.

checking the selectivity

of

the signal

antenna

a 300

generator.

below the

until the output on the db

amount of attenuation as

generator

met.

8-2)-L

movement

If the

unit for installing

the

the cable comes through

A clearance of three

the

(See

Revised 15 October 1947

generator

(100

ohm loading

to the

ON

zero

OFF.

is installed in the air­of

of the

f.gure

Adjust the signal

point

generator

dial

column in the

found

to be operating

in

the aircraft. if

of this Section and
so that the
If

it is impossible

by

clearance

on the sides

of

the

clearance of

be allowed to

controls are not

four inches

behind the receiver is

connector

if

cable does

the

plug.

There must be

above the receiver

8-I)-Use eight

through

mmf capac-

terminal

output

and,

with the

beat with

where the

either side

and

been

standards

adjusting

POSITION

unit

on the

18 inches

permit

must

inches

device

termi-

check

care-

per-

of at

to be

and

plug

f

ac-

to

the

and

be

not

\,

AN l6-30ARRI5-3

Section

ll

RADIO

T­I

rYPrcAL

JUNCTTON

,,^??"^-S

/er,nr

L

V\lRP

MASTER

RADIO

swr

or

ANE/,

TcH

I

I

\

RECE

R-ro5/ARR-r5

TRANSMITTER

MICROPHONE

IVER

ctRcutTs

|L

AUX.

OUTPUT

J-901

REMOTE

SENSITIVITY

coNrRoL

REC.

NO. I

\./

DISABLING

swtTcH

ROPHON

MtC

r--_-{l-i-i

.r-a*-ll-

-tl

ADSET

HE

E

.---

Figure

/

PART

OF

AI

RPLANE

T-----

PILOT'S TYPICAL

OUTPUT BOX

(eenr

or ATReLANE)

i

Cabling Diagrom

2-4.

-v-

C

O-PI

LOT.S

AUDIO

-

AUDIO

BOX

OUT

PUT

2-5

Section ll
Porogrophs

l.b"-2.a.

AN r6-30ARRI5-3

screws for

f10

aircraft. If
of the aircraft
base, a bonding
mounting
tion
the receiver.
short

TIONS.

One or more

may
minals
used
connector
18

and
wire
screwdriver,
be

available

number
reach
the 26.5 volt

power
soldered
connection
not
necessary

fi.gure

nections
mounting
wire for
Solder
careful not
farther
nection.

ON THE MOUNTING

base
one
least possible
been
base
be fastened
the unit
unit
receiver
the unit
certain
connector
connector
of

the

has

been

Iock

2-6

base

may

be made

possible.

as

(3)

POWER

(o)

be used

of the

in

making

19

strippers,

(b)

14

from

connections.

to

expose

for

(c)

8-II)-Use

to terminals

base

the

the wires

back

(4)

PLACING

(a)

PLACF,MENT

has been

receiver

installed

connector

on the

is

securely

on
toward

that

on the receiver

unit.

(b)

SECURING

pushed

assemblies

securing

good

a

GENERAL.

details.)

are

POWER

gauge

the receiver

is

any

CONTROL

control

to strip

to

the mounting

there is

before

connection

is not

strap may

to the

to the

ground

The

control

with

mounting

connections.

not

long

soldeiing

for

making

insulated

power

d-c

terminal

soldered

more

the soldered

number

connector.

into

the insulation

than necessary

designed

and

the installation

time.

and

all

have

the

mounting
mounting
fastened

the mounJing

exerting

back as

over the

the

mounting

to the structural parts

obtained

aircraft

AND

(See

boxes

this equipment.

Terminals

used. It

nose

INPUT

The

number

LINE

number

leads

the connector

AND

BASE.

After

connections

been

proper

UNIT.-When

through

be

connected

or

the

ground

base

pliers,

iron

the

mounting
source

to terminal
of the

18

from

OF

to

in

far

angles

post

connection

CONTROL

fisures

or

console

connector
(

See

numbered

is recommended

side

and rosin

connections.

CONNECTIONS.-Two

wires long

are

positive

L7. The

bare

connection.

CONNECTIONS. (See

guage
4 and

Use numbet

the

from

for

the

SECUR,ING

UNIT.-The

permit

of

the

mounting

made,

base.

base

and

the

base.

be

the

cabinet.

and

base

alignment

the

pressure

as it

that

base

the mounting

from

ground

on

2-4 and.

fi.gure

cutting

base

required

connection

number

wire

10 in

other

terminals

soldered

the

another

to

the

Before placing

certai.n

carefully

connector.

mounting

on the

wiil

protrude

connec-

the front

should

CONNEC_

control

Nineteen

J-901

8-1A

!, Z,

core

enough

connector

negative

wire

than

for

the

the

receiver

22

terminals.

the wire

THE

mor.inting

remo.ral

base

mountine

receiv",

that

place

between

the

receiver

go,

lift

to

the

the

be as

B-11)-

units

ter-

are

that

pliers,
solder

for

the

9.

Do

con-

gauge

being

any

con-

UNIT

in

the

has

*"]

the

the

push

Be

the

base

f.ront

the

frorn

of

for

LZ,

to

to

is

is

of

the receiver

Insert a

in the wing
between the
end.

fixed aircraft
in length.

receiver
A minimum

to

mounts.

front

structual
the mounting
made. through
ing base
may be
the
possible.

sisting of

base connector,

essary to
stallation:
tenna. The
antenna
aircraft
length
paragraph
ing to the
installation
considerably with the aircraft in
ment

2. ADJUSTMENT.

a. GENERAL.-The

equipment consists

piece

Twist

the free

(s)

ANTENNA

(a)

ANTENNA.-The

The lead-in

should

permit

c. ACCESSORIES.-Besides

free

A

panel

of the receiver

(b)

GROUND.-If

part

and

made

receiver.

the receiver,

complete

Headset,

are furnished

antennas

are suitable.

3. for

headsets,

procedure

is

being installed.

Figure

panel

front

of safety

nut

wing

antennas

of two inches

movement

binding

of the

base,

a bonding

the aircraft

to the
Make

headsets,

2-5.

wire through

and

through the

nut

and the round

ends

SYSTEM

ranging

be as short

post

aircraft is not

ground

the

binding

the

mounting

the

following
a Radio

junction

junction

by

ranging from

Refer to

the Navy

junction

for the accessories

p"iJ

adjustment

principally

and tighten

the

of

receiver

from

and

slack

of the receiver

has

been

for

the

good

a

strap

or the

post

ground

Set

box,

the

Government.

type

box

Control

the

wing

one

of the

hole

in

the

nut

designed

1?

to

possible.

as

be

allowed

on the

lead-in.

through

may

the

mount-

conneetion

front

as

short

units,

are nec-

box

and

box

feet

Section

box. The

will

the

on the

40

to

on

apply-

equip-

wire

together.

CONNECTIONS"

is

frorn

the

antenna

direct

should

provided

end

of the

connection

obtained

connection

between

ground

on the

lead

the

basic

base

and mounting

accessories

ANz/ARR-15

jack

jack

box,

17 to 40

page

1-1

designations

jack

and

which

Functions

of this receiving

of

calibration and

nuts.

holes

screw

feet

the

shock

the

to

the

con-

in-

an-

and

Fixed

vary

for

be

of

as

in

I,

r6-30ARRr5-3

AN

Porogrophs

Section

2.a.-2.b.

ll

AUTOTUNE
nized,

nism,

the BAND switch
sary. The AUTOTUNE mechanism
pendable

some
removed
mechanism

rather than

structions for
mechanism

MAINTENANCE INSTRUCTIONS.

receiver controls are mounted on the front

each case a word or words have been engraved

the

control.

line
by each control:

ON-OFF switch,

of

cally
addition, the cathode circuits for the r-f amplifier,

the mixer, and the first i-f amplifier tubes,

energizing circuit

no adjustment

except the unlocking, setting and

part

To unlock the AUTOTUNE mechanism
operates the TUNING control and

BAND

revolutions in
Lock
keys in a clockwise

torque

that

AUTOTUNE

of

FUNCTION

b.

panel

the elements in

of

(1)

panel,

the

operated

adjustment. When

the AUTOTUNE

of

and TUNING

will

and

of

for

is
an adjustment operation.

are

switch, rotate the locking

the

necessary

pressure

indicate

to

The following

POWER

is a

only require

the

mechanism has
repair. The
considered a maintenance

the

synchronizing of the

included in

Note

a counterclockwise direction.

controls

is being applied to the

OF CONTROLS.-AU

ON-OFF, SWITCH.-The

located

combination manually and

power

for the

rotating

by

to rotate the keys

stop rings.

the function of the

paragraphs give

receiver

the

in the

circuit

and

cw relay, the circuit

properly

control,

synchronizing

been

synchronizing

HANDBOOK of

the

the

direction

that are

lower left-hand corner

control

s5mchro-

mecha-

locking

is neces-

is highly de-

replacecl or

of the

operation
Complete
AUTOTUNE

that

the

keys two

locking

until the

indicates

stack

of the

panel.

particular

a brief

operated

electri-

switch.

in-

on

out-

power

the

CHANNEL

the

CHANNEL

circuit

of

if

In

In

to

cleared
to
switch. The electrical
the
ON-OFF switches
pulsing
control

CHANNEL selector switch,
select
upon
are engraved
the 10 AUTOTUNE channels. This control
a
TUNE

for

for remote control by

the electrically operated release

control that desires to

circuit so that only one station

at any

(2)

CHANNEL SELECTOR SWITCH.-The

any of the 10 available

which reception

pi

single

control circuit.

selector
primary power

the

given

the receiver

on

switch that

switch,

impulse

should be equipped

instance.

is

desired.

is

associated with the AUTO-

and the

control

an electrical

will be received

control

the reeeiver.

(fi.gure

AUTOTUNE

The numerals

pqnel

NOTI

PI

LOT

BEFORE

UNLOCKI

2-6,) is

FY

energizing

relay

impulse

section

correspond

with

may

of

an im-

used to

channels

operates

are

the

from

All

have

that

to

AUTOTU

Figure

2-6. Channel Sefeclor

Detoils

2-7.

Figure

(3)

BAND SWITCH.-The

ure 2-7,) is conirected

turn

Unit

that contain the one
The frequency
kc, is divided
may be manually

Singleturn Unit

the locking
BAND

the r-f eoupling

that will

is

and

used

upon which

range

six bands.

into

selected,

stop

counterclockwise

in a

key

switch operates

r-f

and

the band

to

tune

Bond Switch Details

BAND

the AUTOTUNE

to

to select the band

reception

of the

rings

receiver,

The

if the

unlocked,

are

a mechanism

amplifier

plate

frequencies

of

frequency

switch,

frequencies

of

1500

AUTOTUNE

by

direction.

which selects

tank circuits

(fs-

Single-

is

desired.

to 18,500

band

rotating

The

in

which

2-7

Section
Porogroph 2.b"

ll

AN r6-30ARRI5-3

reception
circuits
quency

multiplier

is

desired and selects

for

the high-frequency

stages.

-q','rlrrr/aD

the

oscillator

I

proper plate

and

tank

fre-

disables the
in the
and first
rotated to vary the frequency
kc. 50 kc above and
frequency

avc action, and connects a

cathode circuits

i-f

amplifier tubes. The control

(500

kc).

the r-f

of

kc below the intermediate

50

E

lvlC

8.5

r2.5MC

potentiorneter

amplifier, mixer

may

of the oscillator

be

100

(

Figure

(4)

ceiver has been

permits

that
exact
incoming
(figure
beat frequency oscillator
ing

operation of this control also applies
voltages
indicator,)
terminal
cfi

frequency without having

the

oscillator

2-8.

Colibrate and BFO Details

BFO-CALIBRATE

provided

the

tuning

signal.

tunes the three i-f

2-8,)

positions

to

of the receiver, connects

of slugs

the cfi

oscillator tube,

to the input

with a

the

of

The BFO-CALIBRATE

grid

within the inductors.

(crystal-controlled

circuit

CONfROL.-This

system

receiver

tra''sfonrrers

tank

grounds

of calibration

circuit to any

to tune for

control,
and the

circuit by

plate

and

frequency

the antenna

the

output

of

the

receiver.

re-

an

chang-

The

screen

of the

I FY

NOT

PILOT

BEFORE

NLOCKI

Figure 2-9. Frequency

Main

(5)

TUNING
2-9.) The r-f coupling, r-f amplifier
frequency
quency
are
circuits.
with
mechanism
circuits

inductors.

the
if

the

oscillator

multiplier

all tuned by varying the

The

TUNING control, which

AUTOTUNE Multiturn

the

that controls the

by

determining the

The control

rings are

stop

NG

ANNEL

Tuning Diol Details

CONTROL.-(Refer

grid

and

plate

tank circuits of this receiver

positions

may

unlocked.

Indicalor and

plate

inductance

be manually

The

TUNING

to

plate

tank, high-

tank, and

inductance

Unit, operates a

of slugs within

control

of the

is associated

in

operated

may

t

tigure

fre-

these

be

2-8

RESTRICTED

r6-30ARRI5-3

AN

Porogrophs

Section ll

2.b.-2.c.

unlocked by
clockwise

direction.

rotating the

locking key

MCW

Figure

2-70).

ure

voice modulated signals

or
set at the
is in the
and a variable
output of

jack.
the avc circuit

audio amplifier

the
jack,

tentiometer as

ates

pad
between the output of the audio
PHONES
When cw reception

connected
and
is

selected the

tivity is controlled
marked SENS.
connected
mixer and

of adjusting the sensitivity

most satisfactorily under

interference. A
opening

c. PRINCIPLE

employs a superheterodyrle

r-f amplification and

The i-f transforrners
frequencies in the range 450
able
only during the

2-10. CW-MCW-CAL Selector

(6)

MCW-CAL-CW SWITCH.-(Reter

When

MCW

When the

and the

(7)

VOLUME CONTROL.-This

two sections of variable resistors,

potentiometer.

and a

jack

first i-f

(8)

SENS

behind

characteristics

it is desired to

this

MC'W-CAL

position

"T"

the audio amplifier and

is

volume is

explained

whenever mcw reception is

in the cathode circuits

amplifier tubes. When tncw reception

potentiometer

CONTROL.-The

in

series with the

i-f

stages in the receiver for

which this control is

position.

the avc circuit

pad

is

connected between

switch is set

partially

is

is

by

(See

dust cover is

OF OPERATION.-This

of these

calibrating of the

disabled, the output

coupled

figure

two stages

are variable

directly

controlled by a cathode

above.

The

"T"

selected,

is

the

screwdriver

2-11.)

of the receiver to operate

conditions of electrical

placed

circuit with

and

transformers

in

a counter-

_CAL

Detoils

to

fig-

receive either

switch
When the switch

is operative

the PHONES

the CW

at

to the

control oper-

a bridged

pad

is

amplifier and

potentiometer

a

of the r-f amplifier

shorted out.

threshold

This control

cathodes of the r-f,

the

over the

located.

one

i-f

of

amplification.

and will tune to

kc. The

550

receiver.

mcw

should

connected

adjustment

be

the

position

phones

po-

"T"

the

selected.

sensi-

purpose

panel

receiver

stage of

vari-

is

used

When

the

receiver
to receive a transmitted
are

adjusted
exactly
frequency,

bration, and excitation

has been

so that the

kc. Therefore the actual intermediate

500

as used

calibrated and it is

signal, the

intermediate

for reception is

purposes

i-f

transformers
frequency

kc.

500

three

desired

For

cali-

oscillators

is

SENS

of

SENS

is

Figure

have been
quency

is

100 kc
signal are used
ing

actual

by removing
oscillator

The frequency converting stage of

is

separately excited.

oscillators is used

oscillator operates

3000

obtain the higher

to
The
frequency oscillator, but
calibration
oscillator is

2-l I . Sensitivity

i:rcorporated

oscillator circuit

one

of

quartz

kc

and a

remaining

crystal.
when calibrating the receiver.

reception this oscillator circuit

plate

the

tube.

One

to

excite the mixer

in

the

frequency multiplier

frequency excitation

oscillator

receiver.

the

of

irl

frequency range

the

Adjuslment

into

this receiver.

is

Harmonics of

and screen

of the variable

frequency

is essentially a

tube

is a1"o

The output

Defoils

The fre-

determined

this

is disabled

voltage

used

from the

this receiver

frequency

tube. This

range

circuit

450 to

2000 to

voltages.

during the

by

100 kc

Dur-

is

used

beat

of this

kc.

500

a

RESTRICTED

2-9

Section ll
Porogrophs 2.c.-2"d"

AN

l6-30ARR|5-3

When
being
cuit is
voltages

Two stages

ample output for

receiver

the

phones
connected
stage.

voice

received,

disabled

from

the oscillator

and for

at the

remote control

pentode

The audio

modulated

the beat frequency

by removing

tube.

of audio

the

amplification

operation

the operation

is

tube

used

output stage is a type

tode.

noise

The

employs
nected
cuit

in

is

operative

two tubes.

an accelerated

silencer, following

A dual

triode type

avc

when

voice
signals are being received.
tialil'disabled if cw reception
ing the time

(1)

that the receiver

GENERAL ADJUSTMENTS

PARE THE EQUIPMENT

(See

ltgure

justments,

leceiver is

the

controi adjustments

the
ration

giveu

2-5.)-Bef.ore

choose

to be operated.

of

this receiver

below:

(a)

Operate the Power

the

proceeding

10

frequencies

necessary

for

position.

(b)

Operate

(c)

Position

When

switch to

completed, unlock
TUNE

Singleturn and Multiturn

the locking keys

the

CHANNEL

1.

the AUTOTUNE

the stop

rings

tv'o revolutions

ciockwise direction.

(d)
position
for

for the

Channel

(e)

Rotate
dial indicates
is

desired.

(/)

Rotate

Rotate

number
two

of dial

digits and

the BAND

frequency

1.
the TUNING

the frequency

the

CALIBRATE

divisions

fractions

that has

upon

corresponding

thereof

frequency.

(g)

While listening
ceiver, rotate
desired frequency

(h)

the

until

Lock the

TUNING

BAND
by rotating the locking
AUTOTUNE

(f)

stop

Return

rings

the

to

zero

beat

and TUNING

keys

are

tight.

CALIBRATE

cxact "0" setting.

Select the bype

U)

the CW-MCW

(k)

Repeat

switch.

steps

reception

of

(c)

thru

maining nine frequencies.

Note

If

it is desired
signals,
switch

to

to receive

operate the

the

MCW

position.

or mcw

signals

oscillator

plate

the

and screen

provide

of headphones

of

positions.

One triode

for the first

12A6

the deteetor,

is

tube

circuit. The

avc cir-

modulated or

The

circuit

is

selected and

is

being

is

calibrated.

TO PRE-

FOR

OPERATION.

with

the

upon which

A brief

routine

Switch to

outline

for

the

operation

prepa-

the

Selector

cycle has

on

the AUTO-

Units

by

rotating

in

a counter-

Switch

to

the correct

been

Control

selected

untii

which reception

Control

to

the

desired

of

the re-

about

the

output

Control

is

of the

obtained.

Controls

clockwise

until

Control

desired

(i)

for

the re-

voice-modulated

CW-MCW-CAL

are

cir-

at

head-

audio

pen-

con-

mcw

par­dur-

ad-

of

is

ON

been

the

a

iast

the

the

to

with

d. CALIBRATION.

(1)
brator that
ment

variable
quency
rece-iver
i-n.!he

follow the
mitted

CALIBRATION

is

utilizes

incorporated

a crystal

frequency

i-f

channel.

may

r?nge

be accurately
1500

usuai

signal

procedure

or depending

to

calibration.

The

quency

stability

frequency

two

the

quency

quartz

are

variable

of

crystal.

precision

system

indicator)

the cfi

depends

of

the

frequency

oscillator

The

built
The beat-freq-uerlcy
calibrated
number
intermediate

eque_ngl'

!
BFO-CALIBRATE

mechanism

a
t-uning slugs
ductor and

and

should

of kilocl-cies

frequency.

oscillator

which-change_s

within

the

tuning

formers.

During
the frequency
osc. is set
oscillator

procedure
frequency

and
is varied.

be followe.d.

oscillator
trol is rotated.
setting
quency,

freque-ncy
same

cfi

of the

a

frequency
In

the

is fed

condition

of

into
antenna terminai
K-502.
fed
circuits
attenuate
is used
100
sufficient
the
circuits
oscillator
tun-ed by
and mixer

All

into

for

kc

mixer

harmonics

the

in

ail

calibration.

harmonic

strength
even u,hen

are

tank

the

tank
the cfi oscillator
above and
amplifier,

50

mixer
farther than
100 kc harmonic
which

the

r-f,
becomes the
exciter output
is rotated

but wiil

process

the

of the

the

frequency

In

order to

tuning

the

output

as

the

calibration

the

receiver

is

receiver

the r-f

signals

that

detuned

and

same

control

circuits.

is

kc below

and

50 kc

away

that

mixer

usable

will

vary

THEORY.-The
in this

receiving equip-

controlled

oscillator

Using the

18,500 kc

and

a variable

above

tuned

to any frequency

without

of tuning

upon

primarily

(crystal

unit

cfi

and the

frequency

oscillatois.

is controlied
variable
and are

oscillator

frequency
exceptionally

has

been

always indicate

of

deviation

The

is varied

control.

from

frequency

6y operating

This

control

position-of

the

the low frequency

slugs

within

itre

of receiver

output

It is

is

varied

most

The

frequency

of

the low

of

the high

important

as

the

TUNING

determine

control

must

for

be reached

of

the mixer

output

position

input

groundgd

of the

but tunable

amplifier

except

Alfhough

is to

to

drive

the

band

as

much

multiplier

that

A

used

for

point.

the

excitei

from

is

nearest

and

exciter

signal.

always

as

The

the

be

particular

any

of the lf

the

output

circuil

by

the

100 kc

oslillator

band

and

mixir

the harmonic

attenuated,

be

used

the

signal

pass

filter

as

b0 kc.

tank

tunes

100

kc

calibration

When

circuits

a 100

to

the

circuits

frequency

TUNING

betwepn

Cati-

oscillatoi,

circuits,

havlng

for

a trins-

tuning

upon

the fre-

controlled

stability

The i're-

by

a 100 kc

oscillators

stable.

carefully

propei.

the

-SOO

the

of the

beat

opJrates

grid

osc.

i-f trans-

calibration

frequency
frequency

tMt

of

the

high

co-n-

the

correct

where

stage

is

osc.

of

and

operation

pass

filter

stages

t[at

will

be

grid

aid

tank

The

circuits

r-f

amplifier

harmonic

b0 kc

the r-f

are

tuned

point,

kc

frequency

are

tuned

of

control

4b0

and

-a

fre-

the

t-o

dial

of

kc

the

the

in-

this

fre-

the
the

the

the

of

are

the

of
oi

hf

are

of

the

to

the

2-ro

Revised I Jonuory l95l

t6-30ARRI5-3

AN

Porogrophs

Section

2.d.-2.e.

ll

550 kc higher or lower
harmonic
A, C, or D, the frequency
than the exciter frequency.
BAND B, E,

is higher than the
transformers tuned
frequency
tor,
reach the detector
output
ou@ut of the
between
of the mixer
frequency
The receiver is
between

cated
calibration
beat frequency
from this
TUNING control so

the

of
quency
TUNING

used

the circuits

using an example. If,
as the
receiver, the
followed:

position.

which

completed
and Singleturn Units
two

that

dial

until

signalq.

F,

or

of the output

the output

of

these two signals'indicates

these two signals is

(2)

CALIBRATION

in

the

point

same frequency

osc. Under

control

as th,e

The

frequency

(o)

1.

2.

it is

3.

revolutions in

4.

includes

5. Rotate

indicates 2.i.25

6. Rotate the BFO-CALiBRATE

the dial indicates

The BFO-CALIBRATE
ways be set so that
dicates the
in kilocycles upon
calibrate the receiver.
calibrate
kilocycle of a frequency,

BRATE control should

calibration dial indicates
of the

of the mixer

the mixer is

low

is

exactly

the

of

properly

paragraphs

procedure

oscillator.

consists

uariable ushen

calibration

during calibration

procedure

STEP-BY-STEP PROCEDURE.

Operate

Select the AUTOTUNE

desired to calibrate

When

unlock

Operate

the

iast

the receiver

frequency

in frequency

When

receiving signals in BAND

of

exciter frequency.

to

tle same frequencrv

the

of

tube when

near

frequency

the same

calibrated when

PROCEDURE.-

above,

is

to set the

setting

of

that the

as the

no

circumsttnces

procedure

for instance,

outlined

the

Power

by rotaiing the iocking

the

counterclockwise

ihe BAND

TUNING

25.

Note

the

two

digits
which it is

within a fraction

including

the frequency

output of the low frequency osc.

be set and"

to which

the AUTOTUNE

the stop rings

frequency

the
mc.

than

the

the input

beat

will be

the
the
oscillator.

obtained.

In brief, the

output of the mixer

cutput of

th.e BFO-CALIBRATE

cal,ibrating

are best explained by

it is

switch

2725

control should

calibration

of the frequency

If it

the
be
the last

signal

When receiving

of the

frequency

frequency

frequency

that the output

frequency as the

first step in the

the

frequencl.

position

the

and functioning of

2125

desired

below should be

Switch to the

channel upon

the receiver.

cycle

on the Muititurn

to the

(Band

kc

control

desired

is

desired to

BFO-CALI-

set so

three

the

decimal.

is lower

input

With the

oscilla-

permitted

Zero beat

zero

As

procedure

the lcrv fre-

sh.ould

receiuer.

th.e

is

kc

selected

tune the

to

has been

direction.

position

A).

until the

control

al-

in-

dial

of a

that the

digits

100

signal

as

of

the

of

beat

indi-

of

of the

th,e

ON

keys

to

kc

in

i-f

the

to

the

the

is

7.

With the beat frequency

as described

put

of the

about the
output
obtained.

controls
direction

back

to the

The
turned to

input
antenna
disabled
to 500 kc. The
f.or 2725
channei.
selected by operating
switch. If
moduiated
operated to the MCW-CAL
AUTOTUNE
controls to
whenever

e.

TUNING ADJUSTMENTS.

above

receiver,

2725 kc

of the mixer and the output

8. Carefully lock the BAND
by rotating the locking

until the AUTOTUNE

9.

Rotate the BFO-CALIBRATE

"0" setting.

BFO-CALIBRATE

circuit will

terminal,

and the i-f channel will

ke

and while

point

CAUTION

exact

receiver is now calibrated

this

on

The type

is

it

signals the switch

mechanism will

tune the recdiver

this channel

listening

rotate

zero

the cfi oscillator will

desired to receive

the TUNING

until zero

control must

so that the

be reconnected

particular

of reception may

MCW-CAL-CW

the

is selected.

oscillator

beat

between

of the

and

keys

in

stop rings

receiver

be returned

AUTOTUNE

should

position.

reposition

to 2125

WARNTNG

This

equipment employs
volts) which
if

contacted by operating
treme caution should be
working
inet
switch

dynamotor has stopped rotating
touching
ma|<i.ng measurements rvith
operating and the
well.-insulated

(1)

sired

to
AUTOTUNE
below:

(a)

ition,

operate
number
changed.

(b)
completed unlock the AUTOTUNE stop
rotating the
trol and the
trvo revolutions

(c)
that contains the
desired.

with the equipment with the

removed.

is in the

any of

ADruSTMENT PROCEDURE-If

change

channels follow

With the

the

corresponding

When the AUTOTUNE

locking key

locking key above

Operate

dangerous

are

Be

certain that the

position

OFF

the

cabinet

prods.

frequency

the

Power

CHANNEL Selector

to the

on the

in a counterclockwise direction.

the BAND

frequency upon which reception

voltages

and may be fatal

personnel.

exercised when

ON-OFF

and that the

components.

the equipment

removed use dry

of one or more

procedure

the

Switch

in the

Switch

channel that

cycle

BAND Switch Con-

TUNING Control

the

Switch

to the band

to

the

control

TUNING

a

clockwise

are tight.

contiol

be re-

to

the

be

be

voice

be

The

the

kc

(250

Ex-

cab-

before

Wheu

it

of

outlined

ON

to

is to

has

rings

set

out-

the

bfo is

is de-

the

pos-

the

be

been

by

is

2-l

I

Secfion
Porogrophs

ll

2.e.-2.f.

AN l6-30ARRl5-3

(d)

Rotate

dial indicates the

main

of

beat

by rotating
until tight.

channels as it is

controlling the level of the
ceiver.
cathode
amplifier tubes, is
there by controlling
cal
ception a bridge T
short circuited. The bridge
tween the output winding
former
bridge T
are operated by the VOLUME
the front
in
adjusting
ation is
matic volume eontrol
output level within close limits

MENT.-A rheostat,
receiver
cathodes,
ceiver.
front

justed
dividual

made with
ceiver turned
signal being received. Proceed
plete

switch

ON

(e)

Rotate

that the

ceiver, rotate the TUNING
inal

to

calibration

frequency

the

(f)

White listening

setting and

is

obtained.

(g)

Carefully lock the AUTOTUNE

the locking keys in

(h)

Return

the

"0" setting.

Repeat the above

When locking
not

use any instruments.
thumb and forefinger
torque
that
of

(MCW-CAL position

the circuit when cw emission is

position.

necessary

pressure

AUTOTUNE

(2)

AUDrO ADJUSTMENTS.

(o)

VOLUME.-There

For

circuits of the r-f

and the PHONE

pad

panel.

the

understandability and

(3)

THRESHOLD

r-f amplifier tube

is used to

This control,

panel

by a

for best signal

installation. The

the airplane engine

the adjustment.

(o)

Operate the

to MCW-CAL

(b)

Rotate the

the TUNING

desired

the BFO-CALIBRATE

dial indicates

desired.

to the

Control

carefully set the control so

the BFO-CALIBRATE

procedure

desired to reset.

CAUTION

the AUTOTUNE

and tighten

to rotate

is

being applied

stop

cw reception

used to

the receiver

pad

are connected

The

bridge T

VOLIJME control,

circuit will

connected in

adjust the sensitivity

adjusted through

straight lipped

and completely

ON

position.

VOLUME

the

rings.

audio ou@ut

a rheostat, located in

amplifier

vary the bias

also

is

used and

T

of the audio

jack.

to the same

SENSITTVITY

and first

noise

to

adjustrnent

CW-MCW-CAL

Control until the

frequency.

Control so

the last two digits

output of

ab.out

a clockwise direction

Conhols do

Use only the

keys

to the stack

are

two methods of

output. For

for

used

the rheostat

pad

is

connected be-

The rheostat

control locatecl

pad

is not
selected. When

the main consider-

comJort.

maintain

on

most signals.

series

screwdriver,

ratio

running

adjusted but no

as follows to

control

the re-

the

orig-

zero

that

stop rings

Control

for

as many

until the
indicates

of the re-

first i-f

and

the

on

output trans-

i-f amplifier

a hole in

for each in-

tubes

mcw-

phone)

and

shaft and

connected

The auto-

the audio

ADJUST-

with the

of the

is

should

and the

com-

selector

to the full

the

re-

on

re­the
ad-

be

re-

(c)

Engage
the SENS
screwdriver.

counterclockwise until
tolerable noise
encountered"

cause

control,

the

position

ON

When making
scribed
adjustments must be carried out for
channels.

Each AUTOTTINE

locked

troi
allowed
stop ring

PRE.FLIGHT

f.

(1)
available, the
of caiibration

is

many
available,
familiar

casting services
fixed services
checks are not
immediate
calibration.

at least
BAND switch,
frequency

adjushnent shaft

(d)

Adjust the

(e)

It

discomfort

(4)

ADruSTMENT

above it

before

setting will

FREQUENCY.-If

instances

therefore it

with

vicinity may be used to check

two frequencies

limits.

the

screwdriver

SENS control

the condition

level from electrical

interference

the

to

the operator at any

the

control should be rotated

(extreme

to

rotate without

with the locking key.

receiyer can be checked

against the standard.

frequencies of

or broadcasting

satisfactory, other transmitters in the

The

preferably

clockwise

the TUNING

must be kept

Note

control

changing channels. The con-

lost if

be

TEST

a

a frequency

be necessary

will

such hs control tower

equipment should

on each

near

slot

in

with a

is not

FOR

frequency

standard will

various other

straight

clockwise
of maximum

interference

great

position).

OPERATTON.-

adjustments

in mind that

each

must be securely

the control is

first

locking the

standard is

for accuracy

However,

transmitters,

stations.

the

checked on

be

position

the upper and

the

enough

setting

to

of the ten

to become

If such

receiver

end

iipped

the

fulI

as de-

these

not

broad-

of

lower

of

(

or

is

to

of

in

be

the

BAND vS FREQUENCY

BAND

f1,

B

c

D
E
F

(2)

RECEfiTER

generator
sitivity of the

and output

1.5 to

2.5 to

3.5

5.5

8.5 to 12.5

12.5

SENSITIYITY.-If
meter are available, the sen-

receiver should be checked on all

2.5 mc
mc

3.5

to

5.5

mc

to 8.5 mc

mc

18.5 mc

to

a signal

2-12

t6-30ARRl5-3

AN

Porogrophs

Section

2.t.-2.g.

ll

positions
Paragraph 1. for
ments required.

ditions
lated signal
ratio or
Under

uv and two and

one

is approximately
tivity measuring equipment
may

be
or signals of known
compared.
least

two
range of
end of the
are available
checked by
the MCW-CAL
signal from the
encountered over
receiver at every
test may be
cluded below.

the

of

are the

a 100 mw

these conditions

compared

the BAND switch,

BAND switch. Refer

the

test

The sensitivity measurement

input

value of a

which results

output,

one-half

two and one-half

with

other

reliability can be

The sensitivity should

positions

TUNING range"

rotating the CW-MCW-CAL

checked against

of the TUNING

for reception, the equipment

position

cfi

the complete tuning range of
100 kc. The results of

and

unit.

to

procedure

1000 cps 30%

in

a six db

whichever occurs

sensitivity varies

uv. Average sensitivity

is available,

identical

preferably

In event

listening to the

good

A

typical

the

and

signal

uv. If

the

installations,

tuned

be checked

dial on

signal

readings

2-1

Page

instru-

con-

modu-

noise

to

first.

between

no

sensi-

receiver

in and

in at

each

near each

no signals

can be

control

100 kc

should be

the

pre-flight

in-

SENSITIVITY:

Typical

FREQUENCY

BAND

A

B

c

D

E
F

to

g.

FLIGHT
when the
the equipment
clears
of the carrier
should
originating

airplane

the flight deck.

disclose

MC

2.0

3.0

4.5

7.0

10.0

15.5

TEST.-Due

is in flight,

checked as

be

phone

on

any defects due

the airplane.

from

Contact

Meter

Readings

INPUT

UV

2.4

2.0

2.5

2.5

2.3

2.5

conditions

to

it is suggested

soon as the

with the radio room

emission on

to vibration or noise

OUTPUT

MW

100
100
100
100
100
100

arising

that

airplane

one channel

Scvised

l5 October 1947

2-13

Section
Porogrophs l.o"-3.o.

lll

AN l6-30ARRI5-3

SECT|ON ill

OPERATION

This section

essary to
and the
minor
in
refer
paragraph
explanation of
the receiver circuits

I. STARTING THE

front

control unit in

actual

adjustments.

brief form

to the

a. PROCEDURE.

(1)

panel

contains

control

Rotate

the equipment for

operations necessary

and it is

ADJUSTIvIENT

2)

of this handbook

the

the

or the ON-OFF

a clockwise

only the steps

All

adjustments

suggested

section

procedure

and

EQUIPMENT.

ON-OFF switch

for

the AUTOTUNE

switch

direction

that are nec-

routine

in

that

for

a more

the adjustment

operation

order

are outlined
the operator

(Section

on the
on any

until it

to make

receiver

catches.

detailed

of

svstem.

remote

STOPPING

2.

o. PROCEDURE.

(1)

toward

II

3.

ceiver

the

The
should
disconnecting
source,
circuit
down

GENERAI.

FUNCTION

a.

is

THE

Push

the

panel.

operator

become

the

such as

breaker,

is necessary.

OF THE

designed

EQUIPMENT.

ON-OFF control

Nole

of this

familiar

equipment

a main

in

case

to receive

radio

with

from

supply

an emergency

EQUIPMENT.-Tbis

voice cw

all the

equipment

a means

power

the
switch

shut

and

wav in

of

or

re-

mcw

3-0

Figure

3-1.

Panel Control Functions

frequency

signal within
kc. Ten
by operating a
operation
trols and allowiag the
heads to slip. One
be destroyed
set before automatic tuning can be

channel.

this

The AUTOTUNE controls
before automatic channel selection
tempted.
result

NOTES

b.

(1)
position

CW

(2)
MCW-CAL
ception.

(3)
good practice
to make certain

(4)

at least one minute

temperature.

(5)

the equipment

4. ROUTINE OPERATION.
If

the receiver circuits
controls locked for
procedure
routine operation.

a. PANEL

(1)

PHONES

(2)

tion.

(3)

sponding to the
desired.

(4)

position

the

to

desired.

tion

(5)

control.

UME

(6)

receiver

the

pretuned

is

in

Placing the CW-MCW-CAL selector

Placing

position

After the controls

If

the receiver has

Correct

outlined below should

Insert the

jack.

Rotate the

Select the AUTOTUNE

Rotate the CW-MC\M-CAL

Regulate the

Press

off.

channels

CHANNEL selector switch.

possible

by

Failure

the dial settings being lost.

ON OPERATION.

allorvs cw

to

as

CONTROL.-(See

by unlocking

pre-tuned

this method

the

CW-MCW-CAL selector in the
allows mcw-cal and

check the loching keys frequently

that they are tight.

for the tubes to

errors in tuning

soon

all 1-0 frequency

headphones

ON-OFF switch

frequency

corresponding

the

ON-OFF control

range of

can

rings of

stop

and wiil

Note

to lock

reception.

have

been turned

possible

as

have

upon

to the

audio level

be selected

channel setting

must be

the control

been

or adjustment of

after discovery.

been

be

fisure

cord

which reception is

AN

18,500

to

1500

simply

Manual

locked

is at-

will

in the

phone

off,

3-1)

into

ON

switch

of recep-

con-

will

re-

re-

allow

the

posi-

tuning

the

the AUTOTUNE

have to be

again used on

locked it is

rise to operating

tuned ancl the

channels, the

followed during

piug

to the

channel corre-

selector

type

with the VOL-

to turn the

t6-30ARRI5-3

TUNING

5.

If it

more of the

cedure

Do
the
trol.
mote

a.

With the Power Switch
operate
number
changed.

b.

When

pleted
ing

the locking
and the
two revolutions in

c.

Operate the
contains
desired
CAL

d.

Rotate the TUNING Control until the

diai indicates

e.

Rotate the BFO-CALIBRATE
the

calibration

the frequency

White listening to the output of the

f.

rotate
setting
zero

beat is obtained.

g.

Carefully
rotating
until

h.

setting.

If
BRATE
peak

Repeat

as it is

All
same t5rye

is

Section

Porogrophs

ADJUSTMENTS.

is desired

outlined below:

not unlock any

pilot

operation.)

the CHANNEL Selector Switch

corresponding to the channel

unlock

locking key above the TUNING

the

and set the CW.

position.

the TUNING Control about the
and carefully

the locking keys in

tight.

Return the CALIBRATE Control to the

cw reception

audio output

the above

desired to reset.

channels

to be operated

to change

AUTOTUNE

has been

(When

receiver

AUTOTUNE cycle

the

AUTOTUNE

the

key on

a counterclockwise direction"

BAND

frequency upon

the desired

indicates

dial

desired.

lock the

Control a

procedure

must be

emission

of

the frequency

channels

(See

CAUTION

AUTOTUNE

noified

is

connected for

the

BAND Switch

Switch to the

MCW-CAL

frequency.

the

set

the cgntrol so

AUTOTUNE

a clockwise direction

Note

is selected

few

dial divisions until

is

obtained.

for as

Note

up

set

when the

from

a remote

of

follow

figure

not

to

in

the

has

stop rings

which reception

Control so that

last

rotate CALI-

many

receive the

to

point.

the

3-2)

unit

until

take

con-

re-

posil-ion,

ON

that is

been com-

by rotat-

Control
Control

band that

switch

two digits

receiver,

original

that exact

stop rings

channels

receiver

3.o.-5

one

or

pro-

to the

to

be

on the

rnain

by

"0"

lll

is

of

3-l

,i Secfion

lll

r6-30ARRl5-3

AN

OPERATE
SWITCH TO
P0s

OPERATE
TO

IIICLUOES

FREQUEIICY

OPERATE
CAL
CALIERATE

ROTATE

TITRO

CO
DES I

UIITIL

IS

THE

tT t0N

BAIID

POSITTON

DES I RED

CW MCW

SWITCH TO

TUII

L

AEOUT

REO

FREQUEI{CY

ZERO

OBTAINEO

POWTR

THE

Ot{

SWITCH

THAT

POSITIOII

II{G

BEAT

SELECT

AUTOTUNE

AFTER
CYCLE
U}ILOCX

ROTATE
COIITROL
DIAL INDICATES

RED

DES r

ROTATE
COIiTROL A NUT{BER
OF

DIAL DIVISIONS
CORRESPOI{D I NG
LAST T|{O
DESIRED FREOUENCY

RED

DES I

CHAilNEL

AUTOTUNE
IS COMPLETE

RIIIGS

STOP

TUN I NG

UNT

I L

FREQUEilCY

CALIBRAT IO}I

TO

DIGITS OF

g-2

LOCK BA}ID

Tuil

illG

c0ilTR0Ls

SELECT TYPE

OF

RECEPT

IOI{

A}ID

Figvre

lF cll

SELECTED

BRATE

CAL I

FEr

A

OSTA ItI

3-2" Operating

RECEPTtoil

ROTATE

COIITROL

otvIstoxs

BEAT I{OTE

ts

T0

Sequence

RETURTI
COTITROL TO

.0"

SETTING

PERFORI.I
OPERAT
ALL-

SETT I

CHANNEL

Block Diagram

CALIBRATE

EXACT

ABOVE

FOR

ONS

I

NGS

OF

SELECTOR

r6-30ARRI5-3

AN

SECTION IV

THEORY OF OPERATION

- Section

Porogrophs

lV

l.o.-1.b.

I. MECHANICAL CHARACTERISTICS.

a. GENERAL.
is constructed
be accomplished

are

units
would

employed

be of advantage. The cfi
the dynamotor
in

units. The

ing

the locking wires

dynamotor unit is removed by

teners after which the
straight
to the

up anC out of

cfi, lfo and
which can be removed
actual removal
however. Since the
to the

MAINTENANCE

details on removing

AUTOTUNE

b.

(1)

GENERAL.-The Autotune system con-

sists of a

group
sitioning mechanisms
ments within the

provided

with a tuning knob so that the elements
may be adjusted manually. Each
anism

provides precise

element with which it is

tuning

of the

element
is readily adjustable and
is entirely independent
ing bars, located on each
element to the mechanism for
setting of

the

The accuracy of

system

is

of a very high
herently independent
line voltage, etc. The accuracy
tuning elements
with vernier manual
chined
most

within close iimits

precise

there

Radio Receiver R-105/ARR-15

-

in

such a fashion that servicing

with a minimum of eftort.

where the use of

unit,

unit and the fiIter unit are all

and disengaging

dynamotor can be

the connector. Conne:tions

hfo units are by

without the use of toois.

of the units require

procedure

is important,

section of this book

these units.

MECHANISM.

positioning

of

are

equipment.

mechanisms.

connected

Each

positioning

angular setting of the tuning

associated.

respect

with

of

the

the.other

tuning

to

setting

diai, lock
each

control.

positioning

order. Each

wear,

of

backlash, alignment,

of resetting of the

is

comparable

controls.

to that obtainable
All

and although

are no delicate adjustments or

fragile mi:chanisms.

The Autotune

equipment

this
unit, a multiturn

gears

drive

components. The singleturn

cuit
units are
manual

and the necessary

provided

adjustment

system that is

consists of a motor, a singleturn

unit, a control unit, a line shaft,

electrical control cir-

with tuning knobs

of the receiver eircuit

with which the units are associated.

onable amount of care and attention

give

will

to the

MAiNTENANCE section

long

periods

of trouble free

of this Handbook.

Plug-in

such units

the relay

remov-

the

slide

pulled

plug

connectors

the

use

of tools,

The

tuning ele-

to

mechanism

mech-

position

The

the mechanism

control

each

Jor

the

Lock-

tuning

controls.

predetermined

the Autotune

of

setting

parts

are

operation

employed

and multiturn

permit

to

elemenls

given

If

a

the mechanism

service. Refer

can

unit,

plug-

fas-

The

refer

for

po-

is in-

ma-

the

reas-

In

operation,
channel
to
anism
ments in
of
the
lected.

just

the

precise

control

motor

ing
tion
ing
"Operates
to identifu

selector switch

the

control unit. The

which

sets the motor

motion

mechanical

Autotune

units

After the control unit

mentioned,

tuning

elements are rotated and

position

unit

completes the

and

associated apparatus

paragraphs

of

the Autotune

under

the

On"

the

(2)

CONTROL

(a)

BREAKER

SWITCH (58).-The

is

is

in

contacts,
channels.
the
reaches
respond
tation
wise
does
cycle.
of

one for each of the ten

Selection of any channel

seeking switch rotating

arr open contact. The

to the

of the seeking switch is in

direction

due to the ratchet drive. The

not rotate

The

breaker

the seeking switch.

tional I Identi-

I

2

A

b

1

2

A

/1\

(3)

(1)

tr\

(60)
(61)

6

swrrcH

TACTS
to

rest in the

nel

that

trol

switch

(D5)

(b)

AUTOTUNE MOTOR CONTROL

(53)

(65).-When

position

has been selected the Autotune

is

closed.

a channel is

selected

which completes

control unit

and the

and selects the

sequences which

positioned

for

is

Autotune

right combination

will end

the channel

has functioned

the Autotune

units connected

stopped

to which they were

pre-set.

operation by turning

The

ofi.

give

a detailed functional

system. The numbers

heading

"Identiflmg

refer to the numbers

parts

on the illustrations.

CAM

(See

(63)

tlNff.

Number"

that are

fsure
AND

SEEIilNG

seeking switch has ten

available

will result in

until the switch

open contact will

channel

that was

selected. The

a counterclock-

during

the last

cam is

Iiming

half

of

for

used

RIPTION

OF

PART

Switch Cam

the Autotune

fine adjustment

ffi

Drive

Worm
Worm Gear
Seeking
Seeking Switch
Timing Switch

j

Switch

Seeking

Ratchet Dog
Ratchet Tooth

Cam

Switch

ffi

Drive Worm

Gear

Worm
Seeking
Seeking Switch Ratchet Tooth
Seeking Switch

Switch Ratchet Dog

AND STARTING RELAY

the

seeking

that corresponds

The

closing

switch

to the chan-'

motor coh-

of the switch re-

by

the

circuit

the

mech-

ele-

up

with

at the

The

follow-

descrip-

appear-

and

used

4-7.)

switch

frequency

rotor

cor-

switch

(2)

(3)
(60)
(61)
(58)

CON-

has come

the

se-

as

to

the

ro-

4-l

Section

lV

l6-30ARRl5-3

AN

o)

;

,

:)

c

'aKt"

,-'^$\-\,

\">//

>t

"=

't

-v

-(-

it-\

5-i

=\\

t.\\ |

-

-Ni

:

_

I

i

I

w

,4,

loet

I

-@

l.,l

t50

r

o)

l) r.l

KEY TO SYMBOLS

1. Line Shaft

2. Drive Worm

3. Worm Gear

4.

Clutch Drive Gear

Slip

Clutch Idler Gear

5. Slip

6. Slip Clutch Spur

7.

Clutch

Slip

8. Slip Clutch

9.

Clutch

Slip

10. Counter

11. Couter

12. Cotmter Drum Spu Gear

13. Planetary

14.

Planetary

15. Counter

16. Cam Drum
l7. Cam Drive

18. Cam Drum

19.

20. Cam

21. Cam

22. Cornter

23. Counter

Drum

Cam

Drum Ratchet

Drum

Drum Drive Gear
Drum Idler Gear

Drum Planelary

Drum

Drum Slot
(23A-Pawl
(238-Pawl
(z3c-Pawl

Gear

Band Dog

Band
Drum

Drive Gear

Stationar)'

Gear

Idler

Asembly

Gear

Gear

Spur

Ratchet Dog

Slot Ring

HeeI)
Tail)
Toe)

Gear

Tooth

Ring Pawl

FOR

Gear

Figure 4-1

CONTROL

24.

Counter Drurn l{ome Stop

25.

Home Stop

26.

Pawl Lifting

27. Pawl Lifting Toggle

28.

Home Stop Ring

29. Home
(29A-Pawl
(298-PawI
(Z9C-Pawl

30. Stop Ring

31. Stop Ring Pawi
(31.q'-Pawl
(318-PawI

(31c-Pawl

32. Pawl

33. Stop Ring Drum Lock

34. Tming Knob
Tuing

35.

36. Tuning Drive Limit
Tunirg

37.

38. Tuning
Tuning

39.

40. Tuned Element

41.

42.

43. Cam Drurn

44.

Bar

Stop
Stop Ring Dm Drive

Autotune Motor

. Autotune Control Unit

TINIT,

Pawl

Stop Pawl

Spring

Drive

Idler Gear
Spur Gear
Spu

Drive Cear

MULTITURN

Operating Gear

Toggle Lever

Heel)
Tail)

Toe)

Heel)
Tail)
Toe)

Shaft

Gear

Sptine

Gear Clutch

Control Switch

UNIT

Gear

Lock

Functiondl Diogrom

t:-1,

AND SINGLETURN UNIT

45.

Locking

46. Locking Arm Sp

47.

Locking

48. Locking Arm

49. Locking

50. Locking
il. Locking

Locking Arm

-<i.
Autotrne Motor Control Switch

53.
Faulry*

5.1.
Faulty

55.
Fauity Operatlon Switch Interlock Am

56.

57. Faulty Operation

58.

Seeking

59. S€eking Switch

60. Seeking

61.

Seeking
Breaker Contacts

62.

63. Breaker Cam

64. Autotme Starting Relay
Autotune Starting Relay Contacts

65.

66. Locking

67. Single

58. Seeking
Neon Bulb

69.

70. Indicator

Arm Dri\'. Gear

Arm Er e Collar

Arm
Arm Operating Clutch
Arm

Operation
Operation Switch Cam

Cam

Switch

Switch Ratchet Dog

Switch

Am

Tooth Ratchet Assembly

Switch Locking

. , ar

a ,.:iating

-.erating

Operating

Switch

Switch Interlock

(5-106)

Adjustment

Ratchet Tooth

(5-107)

Operatlng Clutch Spring

(surge

absorber)

Arm

Clutch Drum
Clutch

Clutch Arm

(5-108)

Collar

Cam

Arm

(5-109)

Spring

Clutch

4-2

r6-30ARRts-3

AN

Section

Pcrogroph

lV

l.b.

verses
of the cycle.
cycle

Autotune

the

is

completed, the Autotune control

When

motor to

the

returned to the origi:ral
stopped.

With

the switch in this

tune motor is connected

motor will operate when

the

and

energizing circuit

complete

last haiJ of

position

for forward rotation.

next

the

of the motor

the iast half

the Autotune

and the

position

channel

is completed

switch

motor is

Auto-

the

The

is selected

by the closing of the Autotune starting relay switch
contacts.

tional

gelti-

I

t

2

b

8

9

(c)

aylng

Number

(1)
(2)

(3)
(45)
(46)

(4s)

(50)

(53)

(52)

(M\

(65)

FAULW

i

Line
Drive
Worm Gear
Locking
Locking Arm
Locking

Clutch

Locking Arm

Clutch Arm

Autotune

Switch
Locking A1m
Motor
Autotune

Contacts

switch fails

Sequence

Number

10
t1

the selector

-If
within two revolutions,

will close and energize

switch. The

OFF
will

cause

the switch

energizing

AL

DESCRIPTION

OF

PART

ShaJt

Worm

Arm Drive

Arm

Motor

Controi

Starting Relay

Gear
Spur Gear
Operating

Operating

Control

Switch

OPERATION

to find an open circuit

the faulty

the releasing

of the releasing coil

to rotate to the

Lock

SWITCH

operation

coil of the ON-

OFF

Operates

onl

Nmber

(2)
(3)

(45)
(46)
(4e)

(so)

(52-53)

(44)
(65)

(54).

switch

position

to disable the equipment.

functionat

I
j

Sequence I fying

Number

I

l1i(1):t,i'*st'"rti-rzf1

i

f.gures
unit derives its name from

chanically
require more
includes a friction
the driving torque
stop
and the

drum has ten slots,
spaced
sult in the
coming to rest in the
the cam
only, due to the ratchet

rotate

not

tOenti

I

lNumberi PART

2

|

(3)

AUTOTUNE

4-2, 6-26,

i

(2)

|

(3)

,

(45)

i

(46)

(46)

i

|

(55)

j Faulty

(54)

|

position

than

Drive

Worm Gear
Locking
Locking Arm

LockingArmSpurGear

Faulty

6-27 and 6-28.)-The

a tuning element
360
band type clutch for

ring

drum assembly,

associated

(a)

CAM DRUM

driving

one

36" apart.

pawl

drum

Selecting any

corresponding

is in

during the last

OF

Worm

Arm Drive

Operation
Operation

Gear

Spur Gear

Switch Cam

Switch

SINGLETURN IINIT.

the fact that

degrees

to the

a

rotation. The unit

of

positioning

pawl

stack, a cam drum

gears.

DRIVE

for

each

(21).-The

of the ten channels,

channel will re-

to the

proper

slot. The

a counterclockwise

drive. The

half of

cam

the Autotune cycle.

on

i

Number

I

(3)

(3)

I

(45)

ifti

(55)

i

(54)

i
I i

(See

singleturn

will

it

that does

me-

not

transmitting

elements,

cam

channel dialed

rotation of

direction

drum does

FUNCTIONAL

is

(43)
(16)
(18)
(19)

(20)

i

(21)

I

(31A)

i

i

ten

I

I

of

i

rings

!

of

i
|

tuned

I

that
ing

i

selected. The

|

terclockrvise and clockwise until stopped by

I

ring

(b)

STOP RING DRIVE

stop rings

on

the ten channels. Keyed

permit

each stop ring to rotate independentiy

all others rvhen the stack is unlocked.

element and

setting will

to this same

stack

pawl.

Shaft

Line
Drive Worm
Worm Gear

Drum

Cam

Drum ldler Gear

Cam
Cam Drum Spur Gear

Drum Ratchet Dog

Cam
Cam Drum Ratchet Tooth

Drum

Cam
Stop Ring Pawl Heel

the

stop ring stack, one for

locking

in

result
position

of

stop rings

FUNCTIONA

DESCRIPTION

OF

PART

Operates

--

(43,9.40)

Drive

Gear

(30).-There

washers between

Setting the

the stop ring stack

the tuned

when that channel is

OF

PART

element

rotates

both coun-

on

Number

(r\
(3)

(16)
(18)
(1e)

(20)
(21)

(314)

are

each

stop

return-

again

a stop

at

(2)
(3)

3

A

J

D

7

stop rings

I
I

ing into
while the tuned element

I

l

justment.

I

the

I

i
i

stop rings

the

tuned element

heels fall into the carn drum

(3)

(e)

(8)

(7)
(28)
(30)

(31C)

(c)

STOP

are unlocked

the stop

When the

spring to force the

Fuctional

Sequence

Number

a

figures

Identi- i FUNCTIONAL DESCRIPTION I Operates

fyiag

Numberl PART I

(31)
(30)
(40)

(4)

AUTOTUNE

4-3,6-29,6-30
mechanically
more than

360
ment, the multiturn
plete

as many as ten

ing

element. The

clutch

for trarumitting
sitioning elements,
pawl

stack, a

a

cam drum and the

CAM

Ca)

Gear

Worm

Clutch Drum

Slip
Slip Clutch Band

Clutch Band Dog

SIip
Home Stop Ring

Ring

Stop

Ring Pawl Toe

Stop

RiNG PAWL

the stop ring

ring slots hold the stop

is rotated for initiai ad-

tuned element has

locked, the

at the

pawl

pre-set point.

slots allowing the

pawl

toe into the stop ring slots.

i

j

Stop
Stop

|

Tuning

I

Ring Pawl

Ring

OF

Element I

MULTITURN

dnd 6-3I.)-The multiturn

positioning

degrees

a

tuning

of rotation.

unit may. be required

revolutions to

includes a friction band

unit

the driving

stop

a

pawl

toggle, a counter

ring

associated

DRUM

DRIVE

(31).-When

pawl

toes, serve

element

position

torque

drum

drum assembly,

driving

(21).-fhe

(43,9,40)

(8)
(7)

(28,30)

(41)

(31C)

the
toes drop­ring fixed

set and

been

to

stop

pawl

The

pawl

on

I

wumber

(30)

i l

UNIT.

(See

unit

requires

In this equip-

to com-

tun-

the

type

po-

to

the

assemb;ly,

gears.

cam

I
I
I

]

I

a

4-3

Section lV

AN r6-30ARRI5-3

Note-Key

Figure

tI-2.

to

symbols

Singleturn

may be found in

Unit Fundional

Figure 4-1.

Diagram

H

AN l5-30ARR|5-3

Secfion

lV

Note-Key

Figvre

to symbols

tI-3.

may

Muhilurn Unit

be found

Funaional Diagram

Figure 4-1.

in

+5

5ecfion lV
Porogroph l.b.

AN l6-30ARRt5-3

drum has ten

spaced

36 degrees
result in the
dialed coming
of the cam
only,
not

rotate

Sequence

I

Number

I

1

1

I

2
4

5

6
7
8
9

ten

stop rings

the

ten channels.

locked

due

(b)

each

drum

to the

during

fying

I
lNumberl

I

I

I
|

(17)

I

(18)

I

(19)

|

(20)

I

(27)

|

STOP

stop
of the others
between
locking

each

the stop
in the tuned
that ehannel is
both

counterclockwise

by a stop ring

Fuctional

Sequence

Number

10

The
which
pawl
Autotune
shaft

Identi-

fying

Number

1

2

(

6

a

8
o

(c,)

COUNTER

counter

the stop

toe. Ten

channel,

separated

and

(1)
(2)
(3)
(4)

(s)

(6)
(7)

(8)

(e)

(30)
(10)

the shaft. A
shaft loads
the

rings can not

the

counter drum
counter
ment

of

tary

drive

planetary

width
the

counter
result
tation,

the stack

drum slot ring

the

tuned

gear

stationary

of the

drum

is

that

the counter

+6

slots,

one

apart.

pawl

corresponding

to

rest in

is

in

ratchet

the

last half

I

j

(1)

(1)

Line

Line

i

Q)

|

'Jirorm

(3)

Cam Drum

|

Cam

I

Cam.Drum

|

Cam

I

Cam Drum

|

Cam Drum

|

RING

in

the

stop

W'hen

ring is

due

to

the

ring.

element

ring

again

Setting

stack
taking

selected.

pawl.

FUNcTToNAL

Line

Drive

Worm

Slip

Clutch

SIip

Clutch

Slip

Clutch

Slip

Clutch
SIip Clutch
Slip

Clutc*r
Stop

Riags

Counter

drum

serves

ring is

to be

counter

are

mounted

by

wavy

washer

easily

shaft.

element.

changes

gear

planetary

planetary

at the iimits

drum

for

each

of the

Dialing

any

to the

proper

the

slot. The

a counterclockwise

drive. The

of the

OF

PART

Shaft

Shaft

Gear

Drive

Idler

Drum

Idier

Spur

Drum

Ratchet
Ratchet

cam drum does

Autotune

Worm

Gear

Gear

f2

Gear

Dog
Tooth

DRI\rE (30).-There

ring

stack,

one

the

Autotune

free

to

presence

the

at

that

this

and

clockwise

ppscRrpuox

OF

PART

Worm

Gear

Drive
Idler
Spur
Band

Band

Drum

Drum

DRUM

to

select

engaged

drum

slot rings,

spacers

that

of

slot

rinss

be

turned

The position

is

adjusted

At

the

direction

is

allowed

stationary

gear

of

the

rotates

rotate

Drive

DRIVE

independently

of keyed

tuned

setting

position

same

All

stop rings

until

Gear
Gear
Gear

Dog

Gear

the

revolution

by the

on

the

counter

that

are

is

mounted

axiallv

independentlv

of

during

instant

of

rotation,

to

gear

ceases

counter

more

rapidly.

ten channels,

channel

will

channel

rotation

direction

cycle.

­o,

I
I Number I

i <zl I

(3)

(4,

16)

trsl

|

(19)

i

(20)

I

tZfl

I

are

for

each of

unit is un-

washers

element

and

will result

when

rotate

stopped

l-bpEiiGJr

on

Number

(2)
(3)

(4,

16)

(5)

(b,

(7,

40)

(8)

(e)

(30

)

(10)

(FAST).

stop

one for

keyed

".ry

the

the

move

pin

to

turn.

drum

each

drum

on the

so

gilrun

adjust_

plane-

slot

­in

ring

to

that

of

the
the

and

The

ro_

Sequence

Number

1

,

e

4

J

__:.

I

W!"1

the

width
counterdrum
tary drive gear.
fastened
driven
the

driving

(e)
PAWLS.­the counter
ment

of
spring causing
ring-and
revolution
quence

sequence

I

x!*

I

I * L_!r]l

""

2 | (23A)

3

4

4

I
I

5

(J)
tune cycle
rection.
counter
slot and
from

the

gear

drive

wise direction,

by

the

gear

drive

panded,

counter

is

tion

lever is

the toggle,
toes to

single tooth
a counterclockwise

slot

drum
ter drum

Identi-

Iylng

Number

FU

|
I
I

(10)
(11)

Counter

(r2)

Counter

(13)

Planetary

(14)

Planetary

(22)

Counter

(d)

couNTER

planetary

of

the

g,ear

stationary gear

pin

planetary

Since

to

the

counter

at

a slower

spe6d

gear.

OPERATING

The

stop

ring

drum

slot

release,

to

drop

of

the

the

the

pawl

into

stop

parvl

the

of events positions

ryinC

I

lNumberl

I I
I

I I
|

I
i

I OF I

Drugn

llam

j

Counter

(23B)

(31)

(31)

(30)

Pawl

Counter

|

Pawi

Stop

Stop

|

1

Stop

|

Ring

Ring
Rings

TIMING.-AI

the

cam

drum

The

operation

drum

slot

ring

iifts

the

counter

counter

pawl

pins.

prevents

drum

reversed.

moved

allowing

drop.

drum

assembly

the

lifting

The
the

ring

in

the

Because

ratchet,

is

pawl

lever

pawl

pawls

slots

IJpon reversal,

opposite direction

the counter

the

direction.

pawl

ring

slot

ring

toe

pawl

OF

PART

Drum

Idler

Drum

Drive
Stationary

Drum

DRUM

Gear

Spur

Gear

Gear

Gear

Slot

Rings

DRrVE

has

slot

and

is

driven
shaft
assembly,

the

TI{E

pawl

pawi

is

actuated

press

to

stop

ring

drum.

the

tuned

IART

Stot

Stot

pawl

pawt

beginning

the

cam drum

heel from

drum

which

lifting

from

the

drum

drum is

cannot

on

ceases

by

for

gear

iravels

STOP

tail

is

tail.

against

slot,

The

element.

Ring

Ring

in

a clockwise

the

slot

ring

Because

in

a counterclock-

toggle

rides

toggle,

dropping

direction

the

slot

be

When

place,

the

counter

gear

the

drum

as

ring

toe

ring

Drum

Heel I

Drum

Tail

the

rotates

of

pawl

slot ring.

rotating

lifting

until

the cam

drum

drops into
rides

oni

Number

-;::-i-l
(rr,,

(12,13)

(22)
(14)
(22)

(SLOW)._

traveled'the

to

turn,

the

pi"rr"_

the

g-ear

the
the

drum

around

RING

released.

At

by

the

within

above

of the

kicks

stop ring
pawl

is

expanded

on the

when

pawl

and lowers

ring

driven

rotated

the

the

the

mo_

pawl

the

stop

w"-1""

I

rzsA) i

I

izsel

I

I trtl
I

I reot

I rSOl
I

Auto-

the

cam

cam

into

of rota-

lifting

pawl

by

counter

coun­drum

bv

one

se_

di-

the

toe

ex­the

in

I

i

i
i
i

i

I

is

is

i

a

l6-30ARRI5-3

AN

Seciion

lV

Porogrophs l.b-2,a.

drops

and

ring

slot

tail

stop

drum

ring

operates

pawl

ring

counter
drum
ring
the

TOGGLE.-The

pawl
drum

the

cam

the tails

The upper

tails,

pawl
drive

direction,

drum
When

rectly below

ioggle base

The

frime.

unit

the

lifts

counter

of

tions

the

on
lifting
a
in the
the
ring

lever.

clockwise

direction

counter

slots.

counterclockwise

the opposite

moves
the
the

in

under

tcggle
pawls from dropping

slots.

Funct

Sequence

Number

1
2

J

The counter
limiting

counter

predetermined

the

drum

ter

counter

The

pawl

stop
home
wise
rotation

ratchet

drum

home

operating

pawl.

stop

rotition

of

(fz)

(26)

(27)

(22)

drum

drum

the

eounterclockwise

ring

stop

home

Seluence

Number

1

2

A

(24)

(25)

(2e)
(28)

into the slot.

pawl

ring

slot

pawl

tail.

the stop

to engage

toe

pawl

lifting

of the

is rigidly

pivots

pawl

shaft.

lifting toggle

gear

assembly

When

the counter

the

pawls

collapses

to

which

the counter
direction

direction

counter

the

Drive

Cam

|

Lifting

Pawl

|

Lifting

Pawl

I
i

Counter

home stop

within

has

the

rotated

limit, the

gear

stop

stop

home

gear

pawl

This

home

the

of

counter

drum

dire:tion

clockwise

in a

Counter
Counter

Drive Gear

Home Stop

Gear

Home Stop

Ring

Stop

Ring

The operation

toe, operates

counter

The

pawl

the

toggle

tail

stop

is located

ring

counter

attached

part

an

on

The

of

to

the toggle,

fastened

arm

center

is operated

through

drum

pawl

lifting

toggle

the

drum

the

the counter

is rotated

pawl

fall into

which

pawls

drum

OF

PART

Gear

Lever
Toggle

counter

Assembly

into the

Drum Rings

IMIT-DRIVE._

gear

is driven

counter

drum.

in a clockwise

ratchet

in a

gear

which

limits

stop

limits

drives

clockwise

operates

in turn

the counterclock-

ring.

stop

home

the

direction.

DESCRIPTION

OF

PART

Drum
Drum Home Stop

PawI

Operatirg

PawI

Home Stop

Drum

counter

drum

permits

and

ring slot.

drum

control

the

hinged

by

the

is rotated

lever

allowing

lifting

straightens

preventing

drum

Number

When

direction

the coun­direction'

the

operates

Conversely,

gear

rotation

--@-

the

of

slot

di-

pawls"

which

the

to

sec-

pins

parvl

moves

drum

in

lever

ring

on

(26)

\at )

(22)

by

the

home

in the

of

on

Number

r/ r<\

(2s)

(28)

in

to

the

the

(t)

gear

spur

gear.

spur
tuning
and does
loosened, the clutch
gear

is coupled

tuning drive

tuning

stop

home

Sequence

Number

1

'

2

A

6

2. ELECTRICAL

AUTOTUNE

a.

8-101.
from the 26.5 volt
by the
control srvitch,

in

a

the

each

are

K.103,

motor

through
relay,
switches,
and the

5-109,

motor control

rotation

the
control
starting

a

starting

mechanically

ated

5-105.

the ON-OFF

of

ation

operate

will

the ciicuit
operation
motor and
ten different

the operation

5-106,
cuit seeking
unit and
during
seekirig
breake-r
breaker

the circuit

as
operation

TUNING

clutch

is rigidly attached to the

When

gear

independent of

is

not

rotate

to

gear

spline

gear

drive

Identi-

i
l

Number i

pawl

fying

(34)
(35)
(3?)
(38)
(39)
(40)

(36)

by engaging

taii.

l

I

j

Tuning
Tuning

|

Tuning

I

Tuning

I

Tuning

|

Tuttl.rg

|

Tuning

|

CHARACTERISTICS.

ELECTRICAL

(See

f.gure

MOTOR.-The

d-c

motor star.ting

5-109.

Autotune

given

control

below:

MOTOR

starting

the

the

contacts

relay

contacts

contacts

contacts

the

of

MOTOR

switch

the

of

reiay.

relay

is controlled

locking

A

allows

srvitch

CHANNEL

switch

channel

the

motor

the

the

thru

motor

the

of

begins

fiequency

this

of

CIRCUIT

switch

driven

is

the

of

each

switch

contacts
contacts

is

of

cam

seeking

the

of

DRIVE.

this clutch

-

is not

the Autotune

it.

with

is engaged and

stop ring

the

limits

the stop

n l b-EScnlPrto

OF

PART

Knob
Drive

Drive Gear

Idler Gear
Spur Gear

Gear Clutch

Spur
Element
Drive Gear Spline

4-4.)

Autotune

power

source

relay, K-103,

The components
circuit

and

STARTING

is energized

primary

the

of
the circuit

of

channel

the

of

the ON-OFF

CONTROL

is operated

motor.

Indirectly,

electrically

arrangement

the control

speeific

at

on1y,

SELECTOR

is in the ON

selector

switch

starting

relay

of the

coil

starting

Autotune

the

channels

switch.
SEEKING

part

is a

by

the

of

motor.

ten switch

disconnected

the timing

is attached

switch

motor

rotating

start

Half

of

the

tuning
tuning

engaged,

the

system

When the lock is

the

tuning spur

shaft.

drum

the rotation

ring

lt

The

of the

drum

-l-6pemtes

on

Number

j

(35)

(Jl,

oo.,

i

tss;

i

(3e)

i

(40)

:

I

DETAILS.

motor

and

operates

is controlled

the motor

and

employed

the functions

RELAY.

the

by

power

seeking

and timing

selector

switch

SWITCH. -

-

ground.

to

ThE

circuit

control

switch

ThC

mechanically

the motor

by the

on

switch

motor

the motor

oper-

to be

times.

SWITCH.-If

position, the

new

a

to

by

relay

to

relay

ground' The

energizes
cycle.
may be

oper-

position

completing

one

Any

selected

SWITCH'-The

Autotune

the

For

positions,

ground by

from

s'*'itch,

the

to

relay,

control

instant

an

the circuit

5-107'

same

element'

The

shaft

The

mechanically

of

by

the-

-of

by

cir-

the

4-7

Seciion

lV

srEP

#1

a. A frequency channel has

manually

by
selector

switch. 5-105.

operating the

AN r6-30ARR|5-3

been selected

CIIAIO.IEL

srEP

#2

a. Relay IQ03 has

sult of the completing
ing circuit through

b. The contacts of relay K103

to complete
gizing

circuit.

The

c.

d. The relay

sfEP

a. The armature

b. Seeking

c. Relay

armature

begun to

into the locL.g

rotate.

#3

counterclockwise.

(5107)
revolution
rection.

switch

have

K103 is

operated

tle Autotune

of the motor

locking

in

arm has

position.

of the

motor

5106 and
rotated
a couaterclockrrise

still operated.

of the

switch

one-half

as the re-

energiz-

5-105.

have

closed

motor

has not

dropped

has rotated

breaker

ener-

cam

of a

di-

28V

-

s- ro4

I

z.

s:166

r)

-s-roz-

sTnP

+8

#4

a, The motor

a counterclockwise

b. The

breaker
to rotate counterclockwise
reached
energizing

c. Relay IO03

locking

d. The

tJle
actuating
K103 locking

seeking

pin

pin

on

armature

cam

position

the

circuit

is held

arm.

on the

the clutch

arm

direction.

switch,
(5107)

of

closed

drive

of both

arm.

Figure

is

still rotating

5106,

have

that

breaks

relay

ICt03.

by

gear

approaches

which

drives

5109

iI-4.

and the
continued
and have

the

the relay

the

and

the

Aulofune

in

28V

-

t

{

z'\

s-ro6

Seguence

t

I

I

(,

of Operction

s-t

04

L---i

(Sfieer

I

of 2 Sheets)

+

?ev

AN t6-30ARRl5-3

Section

lV

sTnP

#s

motor armature

a. I'he

a counterclockwise

b. Seeking

cam
counterclockwise
the
circuit of relay

c. The clutch

and
drives the actuatiag arm of 5109 and
the

arm has unlocked 11103.

STEP

a, Seeking switch, 3106, and the

cam, 5107,
that breaks
K103.

b. Relay K[03 opens and causes the mo-

tor armature

wise rotation.

lhe compressed

c.

ing arm operating clutch operates

motor reversing

reverse

d. Ihe motor amature begins

in

switch, 5106, and the breaker

(5107)

have continued to rotate

position

has compressed

K103 locking arm. The locking

#6

a clockwise direction.

that closes the energizing

has

have

the

position.

is

still rotating in

direction.

and have reached

K103.

continued to operate

the spring which

breaker
reached the
energizing circuit of

to

cease counterclock-

spring on the lock-

switch 5109, to the

position

to rotate

the

-

-

2SV

I

28V

T

./

S-lOrl

r

.'.^

}--R

((

\v

s-t0

7

9)

srEP

#7

motor

a. The

in a clockwise direction.

b. Reversing switd 5109 is

place

arm spring.

srEP

#8

a.

lhe
pin

actuating arm of both 5109 and
1C[03 locking arm,
to the original

b. The motor

pletes

The Autotune cycle is

c.

the system is ready for the

a new frequency channel.

of

armature is

by locking

pin

on the drive

on the clutch, which

clockwise

arm operating

position.

is

de-energized

rotation.

gear

and restores

stJl operating

held

still

clutch

engages the

drives the

5109

and

com-

completed

selecting

the

and

t

i-roo

in

28V

-

I

I

s-roz-

- --1

s-tog

Figurc

/h4.

Avtotvne Scguenca of Operotion

fShcet

2 ol

2 Sftectsl

Section

lV

Porogrophs 2.a,-2.c.

t6"30ARRl5-3

AN

locks

a motor

prevents

and
contacts
is

selected

the rotation of the motor unlocks

ground

the

seeking switch and the breaker

from

finding and

by the channel

compieting

opening

selector

circuit

into

the circuit that

switch until

the motor

relay.

5-107,
momentarily
switch
contacts are

is

attached
cuit seeking switch. After
tor unlocks the motor start relay and
seeking
pleting
lay,

the

ing

switch
revolution.
of the circuit seeking

was selected and the

that
open.
breaks the energizing circuit
lay. The motor start relay

(unoperated)
switch to
ing of the

required distance,

chanically
inq

the

TIMING

opened ten

rotates

thru

opened by the operation

to

the same shaft as the rotor

SWITCH.-The

times

as tlle circuit seeking

degrees. The timing

360

contacts

of a cam that

the rotation of the mo-

substitutes the

switch

circuit

for

the motor

ground

circuit through the contact on the

timing

find

During

switch

contacts

the open

this

switch

and the circuit

ground

circuit within

interval

has found the

the

open

timing switch contacts

The

opening of the timing switch contacts

the motor start re-

of

returns to the

position,

be mechanically

motor. When the

allowing the motor

positioned

for the revers-

motor has reversed the

the motor control switch is

operated to the original

motor

energizing

circuit and stopping

position,

switch

the cir-

of

start

segment

circuit

normal
control

remov-

motor.

5-108,

switch

a result

tor switch,

FAULTY

is

operated

of the faulty

the
switch breaker contacts of
The operation of
ON-OFF
be rotated

switch and

to the

OPERATION

if the motor fails

SWITCH.-ThiS

to reverse as

operation of the charrnel selec-

circuit

seeking

switch or the timer

the motor conhol

this switch energizes the

eauses

OFF

the

position,

ON-OFF switch to

disabling

switch.

coii of the

the entire

equipment.

b. SEQUENCE OF OPERATION.-The sequence

is

of operation

PRIMARY POWER CIRCUITS.

c.

4-5.)-This

explained

equipment has been
from a 26.5 volt d-c
um tubes

that are used

12.6 volt heater type.
connected in series-parallel across the
The resistance of the
tube heaters reduce
for

application to

fuIly

in figure 4-4.

designed to

power

source. All

in

the equipment

The

heaters

fiIter

chokes and leads

the

voltage to the

of the tubes are

the series-parallel

(See

operate

of the vacu-

are

power

source.

to the

correct value

connected

heaters.

Refer
power

the
connector
minals 17

voltage to the equipment is heid

of
switch. The operating

panel

the

to figure 4-5. With

the connections from

source made to terminals

plug

P-101

positive),

switch

(terminals

complete

of the

control of application

ON-OFF switch,

or a remote switch,

negative

9

by the

to the

9,

and 17 of

and

ON-OFF

ON

place

after

start

are

com-

re-

seek-

one

me-

the

figure

the

of

ter-

either

posi-

(-r03

Figure 4-5. Primory Power Circuits

energizes

tion

The

101.

Iay

the

operation of the

applies

voltage to all

two dial lamps

dynamotor and connects

the

switch

positive

to

coils
ON-OFF
electrically.
used on the

primary power

the

and to

side of

may

Identical

equipment

control relay, K-

primary

power

vacuum tube heaters, to

the motor section of the

one side of all of the relay

power

the

source. The

be released either

power
control

control switches are

panel

and

mote control units. The switch contains

and when the

released.

The

is.located in

is

switch
plug

ON

brought out to terminal 4 on

P-101. When the

position,

solenoid

grounding

the equipment

the

is energized, the switch is

end of the solenoid that

panel

switch

the terminal 4 will

ON-OFF

grounding

control

of

release the switch and a spring will

mechanism to the OFF

position.
switches that are used with any one
connected in
switch
of

to the

the ON-OFF switch that is

The following

functions

and

parallel

ON

and

position

tabie

of the control

the operating

will energize

in

lists the reference

relavs:

All

installation are

the ON

control re-

manually

on the re-

a solenoid

ON-OFF

connector

in

is

the

return

the

ON-OFF

any

of

one

the solenoid

position.

symbols

or

4-t0

Reference Symbols

K-101
PRIMARY

K-102
RECEIVER DISABLING

K-103

AUTOTUNE

K-501
MCW-CW,

CONTROL

STARTING

CAL

RELAY

RELAY

RELAY

RELAY

AN r6-30ARRls-3

(Operated

.

When the

primary

the
d5mamotor.

When the

the relay K-102
from terminal

Selecting a

starting

103
the field to

MCW-In

voltage

CW, CAL-In

voltage

CAI-When the relay is in

applied
cuit
to

R^ECEfVE-When

is removed
cfi

MCW

the

is removed

the

CW-CAL

is

to the cfi unit, cw

grounded,

is

the receiver r-f input.

the

output

by

ON-OFF

ON-OFF

power

Autotune

are

4 of T-10I.

channel

Autotune

complete

position

position

applied to

and the

is

relay

the cfi unit,

from

voltage is

switch)

switch is rotated

control relay K-101

motor

opened removing

with

the circuit"

from

the bfo.

in the receive

grounded.

is

switch 5-105

motor by

the cw-avc

the

bfo.

the cw-avc

the CAL

ground

cfi

output

ant connected

operating

grounding

is

position,

is

postion, plate

to

the

energizes

the

ground

the

operates

grounded

is

operative

plate

connected,

voltage is

Section

position,

ON

contacts

circuit

relay

one

side

plate

and

plate

and

voltage

ant cir-

connected

voltage

to r-f input,

lV

the

of

K-

of

is

.PE

RAT E D

ov I

.-rroruruE

T{

2i"'g-"..-l4OlI

\{l.

NOTE:

o,-, o*

|

i-z'-'

f

+

rc:i#,

otherwise indicated,

Unless
tance values are in microhenries.

Lrvr

H000#

---tfir

I

-$d,6

I I O-re

K-'FilH'.

A I .l _

n-'Ui1t'ru

r#,[;'ffii:--

s-:oa

/

z:j-.h;S

resistance values

all

t--^

f?"o,=

PO W€R SWtrCH

Figure

t2sG7

l

-to

or

:

l-.H-l-J:ll*

l

I

--a,X

y-,-

in ohms, capacitance

are

4-6. R-F Circuits

-

c-r

05l

OSCILL

c-.:oz

{

-,

-

il

:al-=

I

I

ATOR

tsooT

|

I

l

*

@t^

xrs

','TA

ul-

_-l-

values

MULTI-

in micromicrofarads,

are

TO FIRS.:

ffi4l

PLI

ER

and induc-

Revised

l5

October 1947

+tr

Section lV

Porogroph 2"d"

RECEIVER

d.

(1)
ceiving equipment
and one-half
circuit employs
tion
mal operating
but
side

purposes.
three
ceiver. The
determined

100 kc

of
During
disabled by
from
are variable
quency
multiplier circuit
oscillator operates in
3000
the higher
maining
oscillator but is
the
frequency range
tion of
frequency oscillator
moving the
oscillator tube. Both

oscillators are
clectrically, and
ctable even
and temperature change. All
cmploy

GENERAL.

and two

the r-f frequency

500

of

the oscillator

kc and

receiver.

kc, i.e.,

For

oscillators have

by a 100 kc

are used when

actual reception

removing

oscillators

frequency

oscillator

voice

under

Type 12SJ7

CIRCUIT DESCRIPTION.

(See

covers

mc to 18.5

one stage

stages

frequency

frequency.

the multiplier

The

modulated

plate

of i-f amplification.

frequency

may

450 to 550

calibration

been incorporated

the

tube. The

is used

to excite

a frequency

excitation

is

essentially

also used

output of this

450 to

and screen voltages

precision

give

output

conditions

tubes.

fi,gure

a frequency

mc. The

of tuned r-f

of the

varied

be

and

of

one oscillator

quartz

calibrating
this

plate

other

One of

in

the mixer

circuit is

during

550 kc.

or mcw

circu.t

of the

built,. mechanically

which

of

AN

/-2.)-This

range of one

superheterodyne

amplifica-

i-f

stages is

kc

50

kc, for

excitation

crystal.

oscillator

and screen voltages

conjunction with

voltages.

a

the

oscillator is

is disabled

variable

extreme

calibration

in

Harmonics

the receiver.

circuit

two

the variable

range

signals,

three

oscillators

tube. This

of 2000

used

beat frequency

calibration

With

the recep-

from

frequency

is

exceptionall;r

humiditv

oscillatori

re-

The nor-

500 kc

to either

purposes

this re-

(cfi)

fre-

to obtain

The

re-

in

the

the

beat

by re-

thc

and

t630ARRl5-3

I

type 1N34

la

a 12SL7GT

of

I

output of the
plifier

a type
diode. The
a type
and a type
the output stage.

a t1'pe 12SL7

is

is

to

of

one stage

excitation
consisting
multiplier.

quency

a

quency

oscillator

quency
at the

cuits,_ the
and

ing
of these slugs
trol.
frequencies
selected

reference
functions
encountered
antenna input

ttre multiplier

the

Detection

stlqe_s

12SL7

12SJ7,,

(2)

RECEIVER

(a)

1.

range

multiplier

that

particrrlar

position

The

by the

is

accomplished

fixed

crystal rectifier

is used

detector

through

dual triode

audio

124.6

RF

GENERAL. - This

of tuned r-f

for the mixer

of the high frequency

to

The

high

proper

The

symbols,

of the components

amplifier

lrigde

dual

The oscillator

obtain

is

are

in

when

connected,

beam tube,

The

triode tube.

CIRCUITS.

of two

is used

excitation

necessary

frequency

r-f

amplifier

frequency

plate

of slugs

positioned

tuned

which

BAND

following

the

tracing

to the mixer

through

in the AN/ARR-15A)

is coupled

a noise

and

delayed

CIRCUIT FUNCTION.

amplification.

is

mc

to three

in conjunction

for

circuit

within

circuits

reception

switch.

table

circuit

to the audio

limiter

a type

consists

in

the

pentode

avc

(See

figme

receiver

provided

operates

voltage

exciting

that

is

input

oscillator

are

the inductors.

by

the

for

lists

locations

in

the r-f

the

circuit

output:

the use

(one-half

unit

consisting

12H6

of two

driver

connected.

circuit

oscillator

being

and

tuned

TUNING

is

4-6.)

by

an

in

mc.

of

the

output

grid-

the

desired

in

order.

circuits

from

employs

employs

Separate

the

The

with

the

received.

by vary-

band

and

exciter

circuit

of

. The

am-

of

dual

tubes.

stage

in

and

fre-

fre-

the

fre-

mixer

cir-

All

con-

of

are

the
the

as

the

Reference Symbols

K-502

c-170

z-10L

c-101,

c-102

c-103

c-105,

z-107, 2-108,

c-106, c-l15

z-r09
c-169
c-183
C.LIz

L-729

L-130
c-184
c-117
c-118
L-301
c-301,
c-303
c-304

c-305
c-308

R-304

4-12

c-302

Circuit Locations

Signal
V-101
V-101
Series
V-101
V-l01
V-101
Series with
Series

Paralleled
V-102
V-103
Paralleled with
V-102
V-103
V-301
V-301
V-301
V-301
V-301
V-301
V-109

or

calibrate

grid

circuit

grid

circuit

with

2-101 and
cathode
plate,

V-102

plate,

V-102

Z-L07

with

L-129

with

plate

circuit

grid

circuit

plate

circuit

grid

circuit

grid

circuit

grid

circuit

grid

circuit

grid

circuit

grid

circuit

plate

circuit

grid

circuit

circuit

L-129

L-130

input circuit

grrd

control
control

and

and L-130

grid
grid

gnd

Functions

Calibrate-receive
Antenna
r-f
r-f
r-f
Band
Band
r-f
Mixer-first

Mixer
Mixer
First
First
Mixer

First
hf

osc

hf

osc trimmer capacitor

hf

osc tuning capacitor

hf

osc

hf

osc

hf

multiplier coupling capacitor

hf output

coupler
amplifier
amplifier
amplifier

pass

coupling

pass

amplifier

tuned

plate
plate

grid

i-f

grid

i-f

plate

i-f avc bypass

gcid

inductor

grid

coupling

grid

shunt

equalizing

relav

capalitor

grid

tuned

avc bypass

cathode

capacitor

cireuits

plate

i-f

bypass

bypass

top coupling

tank

capacitor

inductor

inductor

tank

capacitor

capacitor

capacitor

Revised

circuit

bypass

capacitor

resistor

I

capacitor

capacitor

Jonuory

l95l

RESTRICTED

AN t6-30ARR|5-3

Section

Porogroph

lV

2.d.

Reference

Symbols

c-136
c-141

L-101

c-139

c-140

2.

put

and

V-101,
cuits
positioned
capacitors

justed
tuned
coils

receiver
circuits

consists

multiplier.

a Type
oscillator
range
by a tuning
positioned
of the high
for a
less

of the

oscillator
12SG7
plier.

parallel

a
L-101,
circuit is
controlled

used with

particular

The
range required
lected
circuit is

third

and
grid

voltage
respectively.
harmonic of the
mixer.
plate
R-146
the output
the receiver

in

the
frequency
switch:

ru' AMPLIFIER

outtrlut

utilize

are tuned

by

in

so

that

circuits

and condensers

bands

by

the BAND

3. EXCITER
of

the high

The

12SJ7

circuit

of two

given

voltage is

or

multiplier

mc to

slug in

by

the TUNING

frequency

setting

BAND

The

is

coupled

tube,

V-109,

plate

The

resonant

with

a trimmer

tuned

by the TUNING

Three

the inductor,

by the BAND

tuned

harmonics

by

Both

When the

R-147

from the

will be reduced.

The

ranges for

circuits

parallel

by

the TUNING

the

these

in

and are

tube,

plate

capacitor

to

to the

condensers,

is connected

following

resonant

slugs in

paraliel

circuits

the

receiver.

is

freeuency

high

frequency

V-301,

operating

three

grid

the

oscillator

of the

switch

circuit

to

which is

circuit

circuit

by

a slug

different

properly

switch.

fundamental

of the

the

piate

voltage

fundamental

used,

multiplier

plate

circuit

the

provided

switch.

CIRCUiTS.

the

capacitor

fundamental

one

Circuit

V-109
V-109
V-109

Locations

cathode circuit
plate

plate
Series with L-109 and
V-109

plate

CIRCUI|S.-The

of

the

r-f amplifier

circuits.

the inductors

control.

resonant

track

.A

for

switched

oscillator

oscillator

in

a

variable foequency

within

mc.

The

frequency is

inductor,

control.

is always

TUNING

setting.

of the

control

employed

of the

multiplier employs

consisting

in

the inductor

control.

trirnmer
L-101. (See
needed

lor

excite

The

frequency

C-141, C-142

are used

of tJre multiplier

of the

in the

so that

tabie

shows the

and the coresponding

positions

six

The

circuits

with the

difieren{ set

each of the

into

the

The exciter

-

the frequency

L-301, which is

The

control regard-

high

grid

of the Type

by the multi-

of the inductor,

paralIel.

in

capacitors

figure 8-g).

the frequency

the mixer is

multiplier

and

to the second

of the control

and the_ second

to excite the

resistors R-145,

circuit to reduce

tadiation from

of the BAND

circuit

circuit

circuit

in-

tube.

fhese

cir-

which

frequency

frequency

and C-143,

are

tuning

are

ad-

other

six

amplifier

and

the

employs

varied

the same

This

which

are

se-

plate

capacitor

of

is

gnd

4-7.)--rywo

ploying

lectivity
cation.

ception,

quency
500

control.

ence
of
encountered
output

Band

Capacitor
In

A

B

c

D

E
F

4. MIXER
combines
amplified
voltage
employs

voltage
number
multiplier

the incoming

by the

from

a Type

from

one

impressed
When

within

18.5
the

nal
pears
frequency
voltage

its frequency

mc the frequency
multiplier
by

500

in

the

of

amplified

mixer.

The
ranges
six

-----

of the

positions

Frequency

Bmd

6

B

c

D
E

-[

(b)

I-F

12SG7

that is necessary

The intermediate frequency,

is

is varied as much

kc frequency

The following

s5rmbols,

the components

to

the detector

Functions

Multiplier
Multiplier
Multiplier
Multiplier plate
hf osc

Circuit

the frequency

the

grid

always differs

kc. The

mixer

500 kc

following

mixer voltages

of the BAND

of Incomlng

Stgnal

MC

1.5 to 2.5

2.5 to 3.5

.J.O r,O O.a

5.5 to
85

to 12.5

12.5

to 18.5

AMPLIFIER

tuned

pentodes, give

cathode
tuning
inductor

bypass

mixer coupling

Frequency

Range

MC

2to3
2to3
4to6

6to9
4toG
6to9

CIRCUITS.-TLe

signal

r-f amplifier

12SG7

tube,

r-f ampfifier

and the

excitation voltage

on the number

the receiver

range of

of the

heterodyne

plate

circuit

which

by the i-f

is

amplifiers

table

switch:

Ratrge

Frequency

of Excitation

Voltage

8.5

12

CIRCUIT.

stages

of

for

bypass

capacitor

capacitor

capacitor

capacitor

'

Used to

Excite lvlixer

Frequency

Fundamental
Fundamental
Fundamental
Fundamental
Second
Second

voltage

which

with the

multiplier.

V-102,

with the

impressed

two

is

tuned to

one and

excitation

from

one-half

voltage

the received

produced

thus

which is

the frequency

following

shows

the

corresponding

2to

3

2to

3

4to

6

6to

I

8to12

to 18

i-f

amplification,

the receiver

satisfactory

Excltation

VoIbge

2to

8to12

12

rnixer

has

excitation

The

from

grid.

tuned

foequency

Dlfference

+0.s

---05

+0.5
+0.5

-0.5

--{.5

(See

the se-

communi-

MC

2to

4to
6to

to 18

mixer

signal

on

signals

mc to

of the

to the

figure

for normal

500 kc, but during

by operating

table

calibration the fre-

as

kc

50

either side of the

the CALIBRATE

in

lists

order,

the refer-

the circuit locations and the functions

in the i-f

amplifier

circuits as

when tracing the circuit from the mixer

input:

3
3
6
9

stage

been

the
the

from

sig-

ap-

to

the

em-

re-

a

RESTRICTED

+t3

AN I6-3OARRI5.3

OPERATED

AUTOTUNE MOTOR

BY

\

NO'1'E: Llnlcss

alld inductallce values

VL<

sot:
)t Qt

'rl
19

rH;3

I

it

0g

:3

]:i'

OFF ON

othcrwisc

(J

loq

lua
I

>-

\-/

irrdicated,

are

v-to3

POWER SWITCH

resistance

all
in

microheuries.

Figure

0

J0 rL

JJ

I t-t-

NI

"s

Mcw-cAL

cw

R-t39C

tot<

values are ilr

4-7. IF Amplifier

ohms,

capacitance

Circuits

f3

,.r

11.

'T

z-r2l

I

:

PRIMARY POWER

ACTOR

CONT

o--7-ro

values

ts'

Isoo

are

I

rs

.-t

4OO

9-156

in

micromicrofarads.

RSiOTE

I

POWER

.
lswrTcx

Reference Symbols

c-116

C-L12

L.L29

c-178, C-181,

C-183

L-130

c-184

c-116,

c-t22, c-126

c-118

c-120

c-180

L-IO1

L-1i,2
c-1?6
c-123
C-T77
L-133
L.L34

c-r79

plate

The

grid

V-102, and
tube,
are tuned
plate
V-103, and the
V-104
tuned

ation

from

capacitor

the

V-103, are coupled

by

the

tank circuit

coupled

are

transformer, Z-I20.

by

the automatic volume

of

plate

the

C-127.

tank circuit

circuit

first i-f

of the first

grid

circuit of

by capacitor

of the

The

cathodes,

Circuit

V-L02
V-102

V-102

cathode
plate

plate
z-1L9,
V-l03
V-103

grid

grid
V-102,

V-103
V-103
V-103
V-103
V-104
V-104
V-104
V-104
V-104

grid

cathode

plate

plare

grid

grid

cathode

plate

plate
V-105A
V-105A

the

of

the first

of

by capacitor

transformer

i-f

the

Voltage

control

second

i-f

screens,

Locations

circuit

circuit

Z-t20,

Z-12L
circuit
circuit

V-l03

and

circuit

circuit

circuit
circuit
circuit

circuit

cireuit

plate

circuit

piate

circuit

mixer
i-f

amplifier

C-183

2-119.

amplifier

second

C-181

and

for

is

stage

circuit

V-104

circuit

circuit

tube,

and

The

tube

i-f

tube

are

oper-

coupled

through
grid

re-

plate

circuits

turns and
are by-passed

(c)

ligure

4-8.)
complished
ARR-15
in

equipment

AN/ARR-l5A.

the
i-f voltage'taken
trarrsformer,
coupled
of the

through

audio

Functions

Mixer
Mixer
Mixer
i-f coupling
First i-f
First i-f
Plate

cathode bypass capacitor
plate

tank capacitor

plate

inductor

capacitors

grid

inductor

grid

tank

bypass capacitors
avc bypass capacitor
First i-f
F

irst

First

Second i-f
Second i-f

Second i-f

Second
Second

cathode bypass
plate.tank

i-f

plate

i-f

grid
grid

inductor

inductor

capacitor
cathode bypass
plate

i-f
i-f

tank capacitor

plate

inductor
Detector input inductor
Detector

plate

to

DETECTOR

Rectification

by a fixed

2-127.

driver

input tank

returns

ground

crystal

and

from

the

The

a noise

tube.

of the

by suitable

CIRCUIT.

of the

detector

by a diode

The

detector

secondary

output

limiter

capacitor

capacitor

capacitor

capacitor

i-f

amplifier

capacitors.

-

i-f

signal is

in the

connected

is excited

of the last

of the

circuit

tubes

(Ref

er

AN/.

triode

detector

to the

grid

to

ac-

by
i-f

is

4-14

Revised

I Jonuory

l95l

t6-30ARRt5-3

AN

Section

Porogroph

lV

2.d.

The following

ence symbols, the circuit

the

of

components in

the

Reference Symbols

L-134
cR-101
c-131

R-155
R-118
R-119
R-120

-­Reference

Symbols

rl

V-105

C-188
R-155
C-131
R-118
R-119
R-120

R_t55

tables

locations,

detector circuit

in

list

order the

and the functions

as

Locations

In

series with

Output
Between
Between
Between

of L-134

crystal

CR-101 and
CR-101 and Z-l2I

CR-101
Between R-118 and R-120
Between

Circuit Locations

I

Output of L-134

|

Between

|

Between

|

Between

|

Between

|

Between

|

Between

|

R-119 and

L-134 and
C-188
R-155 and

R-155 and R-119
R-118 and R-120
R-119 and

cR-lol

refer-

encoun-

R-118

and

R-11-9

eround

ground

and R-118

ground

ground

tered
input

when

to

the audio

ANiARR-1S.

tracing

the

output. The

the

second for

Input inductor
Rectifier
r-f

filter

Detector

Detector

Voltage
Voltage

divider

divider

F

i

Detector

r-f

by-pass

;
I

Detector
r-f

filter

;
'

Detector
Voltage

i
j

Voltage

x-ttr5

divider
divider

cR-rol

DETECTOR

load

load

load

load

circuit

the AN

from

first

the

table

is

ARR-lsA.

detector

for

the

-

t

are in

ohms, capacitance

and inductance

Figure

NOTE:

in ohms,

are

inductance

and

Figure

Revised

I February

I

d

o

;

(r
o

g
(r

values

4-8.

Unless otherwise indicated,

capacitance values

values

4-BA. AN/ARR-I

values

are in microhenries.

Defector

Circuits

47K

c-r3l

in microhenries.

are

1949

are in

5A Detector

I

I

in

are

micromicrofarads,

(AN/ARR-I

v-rO5

r2SL7

22K

ail resistance

micromicrofarads,

NO ISE

LIMITER

5)

values

Circuit

BALANCER

NOTE:

are

in ohms,

and

inductance

from

the secondary

is

tuned

Load

resistors
resistors
detector.

from

various

audio

reaches

noise

limiter

(d)

R-t

t8

47K

R-r28
2

20K

v-to5

IUDL

c-t29BI

,orI

v-||o

LIMITER

TU

BE

L-IJJ

470

I

Unless otherwise indicated,

capacitance values

values

are in microhenries.

Figure

The

4-9. Noise

crystal

detector

of

to the i-f frequency

R-155

and

R-119

Audio

points

audio

and

output

R-120

along

driver

circuits.

NOISE

LIMITER.

are in

limiter

i-f

transformer

R-118,

form

from

the

tube

R-r

toK

R-t30
470K

I

l/

oryd_\o7

all

resistance

micromicrofarads,

Circuil

receives

Z-I2L

by capacitor

and

voltage d.ivider

the load for

the

detector is taken

detector load.

V-10? through

The noise

-

20

R-t24

4 70K

ORIVEF

values

excitation

which

C-1T9.

the

The

the

limiter

4-t

5

Section
Porogroph 2.d.

lV

AN t6-30ARRt5-3

employed

triode and a dual

greatly

or
ignition noise,
Located between
stage, the limiter
audio
mediately restoring
pulse

in

attenuate

for

the instant

duration.

this equipment

radar,

c-131

R-155
R-118
R-119
R-120

c-130
R-128

R-129

R-130
R-124
R-154
R-150
c-129B

c-133
c-134

uses

two tubes, a dual

diode. This limiter

sharp noise impulses

etc., from

the

detector and

acts like

of the noise

it

at the end

the receiver

gate,

a

impulse

of

Circuit Locations

ween
Between
Between
Between
Between
Between
Between

A

of V-110

Between

plate

and
Plate of
Plate

of
Cathode
Cathode
Plate

of section A
Cathode
Cathode of section

will eliminate

as

such

output.

the first audio

cutting ofi the

im-

and

noise im-

the

crystal

crystal
crystal and R-119
R-119 and R-120
R-120 and
R-118 and R-128
C-130 and

plate

section A
seition B of V-105
of

of section B of

of section

and R-118

and Z-L2l

ground

plate

of

section A of

of

section A of V-110

of V-105

section A of V-105

V-105
of V-105
A of V-110
A of V-110

The

following
ence s5rmbols,
of the components
encountered when
tector output

is

table
AN/ARR-15A.

LZSLT tube,

of section

for

the

In the AN.'ARR-1S.

is

V-105

tables list

the circuit locations,

in the

tracing

to the noise limiter

AN ARR-15,

employed in

Functions
r-f

filter
Detector
Detector

Voltage

Voltage

Impulse

Impulse

Limiter

Balancer

Balancer
Balancer
Balancer
Plate

filter

Noise

limiter

Audio

coupling

noise
the

circuit

the

balancer

a

load

load
divider
divider

coupling
coupling resistor

time

constant resistor

plate

tube

plate

tube
tube

cathode resistor

tube

cathode

time

capacitor

in

order,

and

limiter

from

output.

the

second

dual

triode,

circuit

capacitor

resistor
resistor

resistor

constant

the refer-

the

functions

circuits

The

capacitor

the

for

a type

which

as

de-

first

the

Reference Symbols Circuit Locations

c-188
R-155
c-131
R-118
R-119
R-120
c-130

R-128

R-129

R-130

R-124

R-154

R-150

c-1298

c-133

c-134

amplifies and furnishes
in

order that the limiter

percentages

on all
15A,

this

V-105 and

The
noise limiter
audiosignal

In

receive bias

tions

function

Section B

opqration,

of modulation.

is

dual

diode, a type

tube in which

place.

takes

variations

of V-107.

Between

Between
Between
Between
Between
Between
Between

Between

of V-110

Between plate

plate

Plate

Plate

Cathode
Cathode

Plate

Cathode
Cathode

an automatic
will operate

performed

the

grids

both

at the rate

L-134

C-188
R-155
R-155 and
R-118 and
R-119
R-118 and
C-130 and

of

section

of

section

of

section

of section
of section

of section

of

section

of section

threshold

equally

In

the AN/ARR-

by

Section A

12H6

tube, is

intenuption

of

the

of

and R-118
and

and

of

section A

A of V-110

A

B of V-107

A

level

efiective

of

triode

the audio

ground
R-119
R-120

grorlnd
R-128

plate

of section

of

V-105

of

A

of V-105

B of V-107

of V-105

A of

V-110

A of V-110

frequency
tector
of

of

t"\e
the

sec-

audio
of the limiter
section A
filter
plate
so
the

V-105

load

V-105

rate

components

loading

that

positive

Functions
r-f

Detector

r-f
Detector
Voltage
Voltage
Impulse

A

Impulse

and

Limrier

Balancer
Balancer
Balancer
Balancer
Plate
Noise
Audio

by virtue

resistor. The

(ARR-15,

and is

tube, V-110.

of V-105

resistors

with

no

voltage

filter

load

filter

load
divider
divider

coupling

coupling resistor

time constant

tube
tube
tube cathode
tube

filter

limiter time

coupling capacitor

being

of

plate

V-107

in ARR-15A)

coupled to

varies

C-1298,

audio

on the

the

at an

R-129

R-130

excitation

plate

capacitor

plate

resistor

plate

resistor

cathode

connected

current

cathode

plate

The

average

and

and

R-124

from

of

section A

resistor

resistor
resistor

to

the

of section B

varies

of section'B

current

rate

C-133.

are

the detector.

of

de-

at the

of

due to

The

chosen

V-110

4-16

Revised

I February

1949

l6-30ARRr5-3

AN

Section

Porogroph

lV

2.d.

MF

CI

"'i )-Z^l^iT."

t Pt;;

V

R-t24

170

-IO7
ORIVER

K

AUDIO

cause a rise

(V-107

the
of
fore,
A
tube is interrupted
the signal.
receives

(section
A does
constant
C-133,
V-110
with
noise
through resistor
rives
plate
between

section

tential
rate

coming

matically

of modulation.
coupled to
capacitor

in

limiter

section B

is driven more

of

V-110 and

the

B

not

of the
therefore the
does

the

cathode of

impulse

out of
potential

the

B of

of section

directly

signai,

plate voltage

in

ARR-15A). The

tube V-110, being

of V-105

the current flow

While

same

of V-107 in ARR-15A),

follow

filter components C-129B,

not recei.ve

is

phase,

thus

plate

limiter

proportional

the noise

set and

The
grid

the

C-134.

in

cathode

connected

(V-107

positive

causing a

grid

the

impulse as

noise impulse

the

plate

section B of V-110,

coupled

R-128

the limiter

and capacitor

which tends

aiding in reversing

of section A

tube V-110,

A

of V-105 vari.es

output

of

the

in

than the

hole

of section

the

of section A

the noise impulse

to the

to lower

to the

limiter

is

effective

limiter

of

driver

section

ARR-15A),

through

the

plate

and the

since

strength

threshold

B

of section

to

plate

punched

to

be

A

grid

of

plate

due

to the

of limiter

however

of

C-130

the

the

the

at

an

on all

tube V-110

tube, V-10?,

of

V-105

B

plate

the

there-

of

section

the

limiter

of V-105

section

of

section

time

R-129

tube

in phase

section

and

positive

polarity

cathode

plate

average

of the

is

auto-

values

of

in

B

and

the

A

ar-

of

po-

in-

is

by

NOTE: Uniess

in ohms,

are
and inductance

Figure

is slightly
cathode

flow

section
to
obtained

If
ceived,
ARR-1SA)

Reference

4-94. ANIARR-l5A

of section B

through the limiter

B

the cathode section B

noise

a

the

otherwise

capacitance values

values

higher

V-105

of

from

the output

irnpuise with

grid

will

be driven more

S

c-407
c-501

C-171,

170,

c-173,

Z-\02,

10L,
z-L04,

101, C-102, C-118
103, C-120,

C-L72,

C-L74, C-175

Z-L03,

z-L05,7-L06

C-123

indicated,

are in micromicrofarads,

in microhenries.

are

Noise

than the

of V-110 resulting

(V-107

of

section B

positive

tube.

in ARR-15A)

of V-110

of the

a steep

Circuit

V-201
Between
V-101

V-101

v-101,

V-101,

resistance values

all

Limiter Circuil

voltage

in

a current

Since the

an audio

limiter

wave

of V-105

negative

plate

is

signal

tube, V-110.

front is

(V-10?

which will

plate

K-502 and S-101A

grid

circuit

grid

circuit

v-103

V-103 and

on the

of

coupled

is

re-

in

V-104

brator

ment

able
i-f
may
range

the
nal

ence
of
countered
of the
osciliator.

cathodes

(e)

CALIBRATION

that is

utilizes a crystal

frequency

channel.

be accurately

1500

usual

or

depending

s5rmbols, the circuit locations

the

components in the

cfi unit

incorporated

controlled

oscillator

Using

to 18,500 kc without

procedure

fhe

foilowing table

when

(Refer

the

above

tuned to

of tuning for

upon tuning

tracing the circuit

to the

lCoupling
iCalibration
lAntenna

I

amp

lr-f

I
L
:avc

lcathode

beat

figure

to

tion

capacitor

coupling

grid

Dypass capacrtors

bypass

and

calibration

input capacitor

inductors

CIRCUIT.

in

this

receiving

oscillator,
a variable
circuits,

any frequency

having

a transmitted

dial

calibration.

lists in

4-10.)

order, the refer-

and the functions

circuit as

from the

frequency

capacitors

capacitors

The

­equip

a vati-

frequeney

the

receiver

in

to follow

output

calibration

cali-

the

sig-

en-

Revised

I February 1949

4-t6A

I

Reference

2-107,

z-L09, z-L09,

z-1L0,

z-LL3,

z-LL6,

c-105,

c-115
L-129

I-130

C.I\2
c-178,
c-184
c-140
c-117,
L-131
L-732
c-176
c-180
L-133
L-134
c-t77
c-1?9
c-L28
c-208

c-106,
c-108,
c-113,

C-191,

C-L22,

Symbol

z-LLr,

z-Lrz,

Z-1L4, Z-LL',
Z-LI7,

Z-LL9

c-107,

c-109,

c-111,

C-114

C-193

C-126

Circuit Location

plate,

V-101

V-101

V-102
V-102
V-103
V-102

Z-IL9,
V-103
Between
V-102,

V-103
V-104
V-104
V-103
V-104
V-105A
V-104 plate
V-105A
V-105A
V-201

V-102

plate,

V-102

grid

circuit

plate

circuit

grid

circuit

plate

circuit
Z-L20 nd Z-L2L
grid

V-109

circuit
circuit

circuit
circuit

plate

V-104

circuit

circuit

V-103,

plate

grid

grid
plate
plate

circuit

plate

circuit

plate

circuit

plate

circuit

r6-30ARR|5-3

AN

grid

circuits

grid

plate

and

plate

(V-1058
(V-1058

circuits

grid

circuits

2

of

V-102

in

ARR-15A)

in

ARR-1SA)

Function

r-f

amplifier

pass

Band

Mixer
Mixer
First
Mixer
i-f

First
Exciter
Plate
First
Second i-f
Second i-f

First
Second
Detector
Second i-f
Detector
l-f
[-f

grid
plate

i-f

plate

coupling

grid

i-f

coupling

bypass

plate

i-f

plate

i-f

i-f

osc coupling

osc output

band

capacitors

coupling

inductor

grid

inductor

tanks

capacitors

tank

capacitors

inductor

grid

gtid

tank capacitor

plate

input

plate

input

coupling

Porogroph

pass

capacitor

capacitor

inductor

tank

capacitor

inductor

inductor

tank

tank

capacitor

Section

inductors

capacitor

lV

2.d.

9o

-o

N..

rr ,b

-t_t

c-t69

N

oo

r2sJ7

v-402

ll

ll

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vi

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t;

N

ER

r2sG7

v-ro2

c

R- il8

OU

L-lo4

-l-----1

20

TPUT

IBRATION

c

-'+i'e

A

[-ir2

EI

r-l

l^l
ltz\'+26.5v

l-.

I

I

'

NOTE:

Revised

Unless otherwise
inductance values

I Februory 1949

indicated,

are in microhenries.

Figure

resistance

aII

4-lO. Calibration Circuit

values

are in ohms,

capacitance values

(AN/ARR-I5)

are

in micromicrofarads.

L-J

and

+17

Secfion

rv

Porogroph 2"d;

AN IffiOARRI5.3

rr--ao

lzSJ7

o

:
n

R-4

r?sJ7

v-402

CF I UNIT

N

iFI,E:s,,,'

too

ro

l

E^ctrEF

CAL.SWtlCH

OPERATEO

BY

TOTUNE

s-ro6

/

L____J-

o

6

i

s-ro3

c-t22

"ot

uF

,.':li,

- -'^''"-sr^'<3

*-l

-204
noo

fiE

N

T

-

cw

,<

_-\,

J

T^,

M

-.5E

MCW-CAL

-iI

+

o

OETeCTOR

OUTPUT

CALIBRATION

OSCILLATOR

L-r05

'e

c

-'ai

R- r3l
3300

r-l

l^r

I rz\

'+2o

5v

NOTE:

t00

CFI UNIT

simplified

bration

system.

depends

cfi oscillator

the
the two

&t8

Unless

otherwise

inductance values

indicated,

in

are

microhenries.

Figure

tsc HARMoNtc9

\

EXC I T€R

The block diagram, figure

form, the operation

This system

primarily

variable

upon

the

and

frequency

of the receiver

of receiver

the frequency

frequency

oscillators.

all resiltance values are in ohms, capacitance

4-lOA. ANIARR-t5A Calibrotion

450-550 rC

i

\

Figure 4-l l.

4-11,

shows, in

calibration

stability of

stability

the

cnli-

4to-550

Colibration

of

fre-

Kc

\

DETEC

Systcm

quency
kc
tors are
The low frequency
brated and
bration dial

of the

quartz

precisiou

Circuifs

TOR

cfi oscillator is

crystal.

it

is

will always indicate the

values

are in

.

The

variable frequency

built and

are exceptionally

oscillator has

reasonable to

Revised

micromicrofarads,

controlled

been

by a 100

carefully cali-

expect that

proper

l

Februory

and

oscilla-

stable.

the

cali-

nurnber

1949

AN t6-30ARRl5-3

Section

Porogrcph(s)___

lV

_

kilocyeles

of

frequency.

diate
quency

BRATE
which

oscillator

control. This control. operates

changes the
in the l-f osc
within the i-f

deviation from the 500

of

is

grid

transformers.

During the

frequency of the output

the

is set and the

osc

is

osc

varied.
cedure be
Reversing
control
result

and varying the CALIBRATE

in
and consequently

calibrating the receiver

once
!fl.rency,

it is

slightly, the

set and

the exciter tuned

It is most
followed when calibrating
the operation by

a "trial

and error" method of calibration

considerable

desired

low frequency osc

obtained.

In order to determine

TUNING conbol

of the
a condition
of the output of
quency

When calibrating

erated
usual
mixer

the output

output

the

low,
sometimes
than

ceived.

output

must be

the mixer

as the output

the

the cfi oscillator

by

transmitted signal.

that is in the

of the

of the exciter.

frequency of the output of

kc higher and

500

frequency of the

the

In Bands A, C, and

the exciter

of

The

frequency of

varied

by

operating

the

a mechanism

positions

inductor and

process

frequency of the

the tuning

of

the tuning slugs

of receiver

of the

high frequency

low frequency

important that this

the receiver.

setting the TUNING

loss
for

time. If, after

of

particular

a

to change the calibration

frequency should

until zero beat

the correct setting

for any

particular

reached where the

is the same fre-

stage

the low

of

receiver

is

frequency

a signal that

used to replace the

To obtain ou@ut

is

450

beat

frequency range

cfi

oscillator

indicated in the table be-

As

the exciter is

sometimes 500

signal that is being re-

D the frequency of

is

kc higher than the

500

kc intenne-

Iow fre-

the CALI-

slug

with-

calibration

pro-

control

will

fre-

even

is

again

frequency,

frequency

osc.

gen-

is

from the

kc

kc,

the

lower

to 550

against

the

fre-

be

quency
by
quency
than
pressed

of

the signal that

the

r-f amplifier. In Bands B,

c

D

L

of the

the

f .5

2.5

3.5mcto

5.5 mc to

8.5 mc

12.5 mc to

output of the exciter

frequency

upon

Frequency

Range

mc to aS rrrct e rnc

mcto 3.5 mcj 2mc

to 12.5 mcl 2 mc to 3 mc

18.5

of

the signal

Frequency

5.5mcj 2mcto3mc
mcl 2 mc

8.5

mci 2 mc

HF

is

being fed

the signal

grid

of the

Ocs

to f rrrc
to 3mc

to 3 mc

to 3

mc

2
4
6
8

mc to
mc to
mc to
mc
mc to
mc to

When calibrating the receiver,
of the
circuit
the
oscillator
pass

stages
is to
the 100 kc harmonic that
sufiicient strength to
mixer
cuits
quency
tuned

6.er
plifier

100
citer is

cfi

oscillator

and

operation

the

of

is fed into

anten:ea

K-502. All

the receiver

terminal is

harmonics

are fed into the receiver

filter circuits in the

attenuate

all

signals

r-f amplifier

except the harmonic

be used for calibration. Although

is

to be used

when the band

even

detuned as

are

tank

osc

by the same

and mixer tank

and mixer tank

point,

kc

the frequency of the output of the

also varied.

drive

much as

and multiplier tank circuits

control that

circuits.

circuits

A 100

signal

the

pass

filter

kc. The

50

tunes

Thus

are

kc

harmonic of
oscillator is used for calibration 50
ke

below the

monic

of the 100
the receiver
to 4650
be of

equal strength

point.

to

kc. The

For example, the 4600 kc

kc crystal is used when calibrating

points

in the frequency range 4550

4500 and the 4600 kc harmonics will

4550

at

kc and the 4600 and

into

the

E,

and

F,

the

is

500 kc

that

is

being

mixer.

+0.5

6

to

---O.5

9

-<).5

It
18

the

+0.5

+0.5

output

grounded

of the

100 kc

but tunable

and

attenuated,

will

grid

of the

and

tank cir­high

the r-f

when the

ampli-

r-f am-

detuned from

the cfi

kc

above and

mixer

fre-

lower

im-

mc
mc
mc
mc
mc

input

baad

mixer

that

be of

fre-

are

the
ex-

har-

the

by

50

Revised

FebruarY

I

1949

4-t8A

t6-30ARRI5-3

AN

Section

Porogroph

I

lV

2.d.

harmonics will

kc

4?00
kc. When
cuits

point,

kc
frequency
cuits

the

tuned

are

the

to which

are tuned

Referring

frequency of

the

ways an

even 100

cfi oscillator.

will

B

will always

lower

point

at

D, the frequency

or

as

vary

be between

in frequency

When receiving

A.

lower than the
When
of
quency
formers

of the

mixer

when
near
quency
signals

receiving

the signal

of the signal

tuned

low frequency

wiII be

frequency of

the

frequency

the

oscillator.

indicates

DEi:CTOR

be of

r-f amplifier'

farther than 50

100 kc

harmonic

r-f,

the

becomes

the block

to

the usable

kc harmonic

The frequency

the TUNING

than the

of the sigrral

frequency

in Bands

point

to the

A will

point

at

same

at

oscillator,

permitted

the

of the output

Zero

that the

strength

equal

kc

that

and

away

is nearest

and

mixer

mixer

the usable

diagram,

at

signal

the output

of

the

of

control

450 and 550

frequency

signals

point

at

the signal

of

B, E or

F the

be higher

B. With

frequency

the

reach the

to

output of

of

between

beat

output of

the mixer

at 4650

exciter

a

from

to the

exciter

signal.

4-1L,

figure

point A is al-

100

point

signal

at

is rotated

higher or

kc

signal

the

of

in Bands

A,

A will

point

at

frequency

the

than

if trans-

the

as the oudlut

output

of

detector

the mixer

low

the

these

ITER

IM

L

r2H6

v- ilo

cir-

100

cir-

kc

but

be

B.

fie-

the

tube

fre­two

is of

exactly the same
output of
brated

the lf osc.

when zero beat

frequeucy

The receiver

between

as the

frequency

properly

is

the two

the

of

cali-

signals is

obtained.

(i)

AUDrO

Auclio amplfication

one

power

and
that is developed
sistors, R-155,

noise limiter

across
in
R-151.

C

the

limiter

the

This voltage
driver V-107
the audio
the audio

driver

fiIter

through

impressed on the
tube V-108.
put

of the
J-111,
attenuator

5-102

is

is also
Operating

pad

out

contacts

DRIVER

I2SJ7

v-r07

An output

power

through the

is inserted

in the

G

terminated

this switch

the circuit

of

the

on

AMPLIFIER

is

obtained

amplifier

across the diode

develops

is

V-107

Z-L22.

grid

amplifier

mcw-cw

MCW

at

audio

R-119,

applied

pin

AUOIO

circuit.

capacitor

is connected

The

of the

transformer

in series with

position.

to CW

and

disabling

r246
v-ro8

R-118,

tube

stage.

and

voltage across

to

filtered audio voltage

to the

switch,

No.

disables

OUTPUT

CTRCUITS.

by one audio driver

The

audio voltage

detector load re-

R-120, is impressed

The

current

grid

the

C-134.

to the

power

1246

couples

head

5-102.

the

The
11 of connector
position

the

reiay

T-lol

flowing

resistor,

of the audio

The output of

input

amplifier

the out-

phone

A

"T"

output when

arrdio output

takes the

avc.

K-102 open

of

is

jaclg

pad

P-101.

't["

Relay

OPERATED

AUTOTUNE

\

AY

MOTOR

3

t

I

&

g

c

v- ro5

NCER

BALA

r2SL7

r-\

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Y

+.200

.o4J

70

.YJ_,o^

1,6

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/

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z-tzz

I

-l----l

33o

|

--r

26.5V

REMOTE

POWER

I
ISWITCH

NOTE,

Revised

IJ"l".r

"**.*tre

inductance

I February

indicated,

values are in

1949

resistance

all

microhenries'

Figure

4-12.

values

in ohms, capacitance

are

Amplifier

Audio

Circuil

values are

micromicrofarads,

in

and

+19

Secfion lV
Porogroph

the

secondary

101,

when the

2.d.

The following

Reference Symbol

c-134

R-l51
R-131
R-t27
z-t22
s-102
R-l53
c-185
R-134,

C-135

T-101

R-139A
R-1398

R-140
R-141

c-168
L-127
J-111
K-102

circuit

of the

Autotune

table

audio

system

lists in

Circuit

V-107
V-107
Terminal
V-107
V-107
One section

V-108

V-108
Connected
V-108
Connects
Connects

ground
Series
Series
Shunted
Series
Connected
Connects

ground

to

transforrner,

is functi6n;.g.

order,

grid

grid

the

Location

circuit
circuit

3 of J-105

plate

circuit

plate,

V-108

connects

cathode

cathode

in

series

plate

circuit

to

R-140

junction

with

R-141

with

R-140

across

with

J-111

ta

one

J-111

L-L27

side

AN

t6-30ARR|5-3

T-

ence

s5rmbols,
of the components
encountered

refer-

limiter

output

grid

Z-722

in

circuit

T-101

primary

to

across

and

R-141

of

R-140, R-141

and T-101secondar5r

and J-111

ground

and

of T-101

secondarv

the

circuit

in

when

tracing

to

the

Function

First
Audio
l-f
Audio
Audio
cw-mcw-cal
Audio
Audio
Audio
Audio
"T"
"T"

"T"
"T"

Phone
Audio
Audio

Receiver

locations

the

audio.amplifier

the

audio

audio

driver

osc

decoupling

driver

firter

output

output
equalization
output

pad

bridging

pad

resistor

pad

resistor

pad

resistor

jack

output

output

disabling

and

circuit

output

connector

coupling

grid

resistor

resistor

plate

load

switch

cathode

cathode

transformers

resistor

fllter

capacitor

r-f

filter

jack

relay

the

functions

circuits

from

capacitor

resistor

resistor

capacitor

network

the

as

noise

jack:

s{

o{

-r(

AUTOTUNE

+20

o

;

I

OPERATEO

II

\

C-l3O

or/JF

c-r298

3I

d($

:

I

o

N

eaL

X

T

BY

MOTOR

Unless otherwise
inductance

-

t2sL7

v-

ro7

values

q-126

22OK

R-

sF

F

f)

Y

indicated-

are in

Figvra

LIMITCR

t2

H6

v-ilo

all resistance

microhenries,

+lA"

DRIVER-SECT.

.IJJ

6

a70

7

r

values

are ln ohms,

AN/ARR-ISA

l2s

L7

v-

to7

w Mc\

tc

t>\

L-F-

capacitance

Audio Amplifier

AUOIO

t2A6
v-ro6

X-IfJ

330

values

Circuits

OUTPUT

s- ro2

are ir,

T-|ol

-

;{6)

=

r56

c-

500

-i".o-iJoEIEIII

Reviscd

t\:i

I
I

rv

I

I

|

,.'-,

f\L/

j
L-J

I

Jonuory

J-il|

OUTPUT

26.5V

i

^.13r.

| eowen

lswtrcx

l95l

I6.3OARRI5.3

AN

Section

Porogroph

lV

2.d.

(g)'AUTOMATIC
Delayed
celerated characteristic
cuit to reach

is a feature

Reference

is

avc

employed in this

maximum

of the circuit.

Symbols Circuit Locations

c-r32

C.L27
R-123
R-126
R-122
R-133

c-129A
R-121
R-125
c-129C
R-111

c-118
R-102
c-101, c-102

The delay feature

fashion that

a

avc

any
ceived, thereby
in the
is obtained

most sensitive condition.

the controlled tubes do not receive

voltage while a weak

allowing the receiver

piacing

by

VOLUME CONTROL.

receiver.
which enables
efticiency on strong signals

Refer to figure

Plate of section A of V-106

Plate

of section B of

Plate of section A of V-106

Cathode of section A of V-106
Cathode of section

Between

Cathode
Plate of section B of V-106

Plate of section B of

Between
Grid return of V-103
Grid return of V-103
Grid return of V-101
Grid return of V-101

of the avc functions

positive

a

R-122

of

R-125

signal

This delay
voltage on

An ac-

avc cir-

the

4-13.

and

section B of V-106

and

in

is

being

operate

to

feature

the avc

-

V-106

A of

ground

V-106

ground

such

re-

The following table

ence

s5rmbols,
of the components in the
encountered
input

to the

V-106

tube

cathode which biases the

potential
soon

as the received signal

plitude,
ind the
receive

the circuit

when

grids

prevents

and

the signal

avc tube begins to

all avc voltage

lists,

in

locations,

i-f

amplifier

tracing

of the controlled

the circuit

order,

and

the

from

tubes.

the

refer-

functions

circuits

the

Functions

Accelerator
AVC r-f
Accelerator
Accelerator
Voltage divider resistor
Voltage divider resistor
Filter capacitor
AVC load
Filter and time constant resistor
Filter and
AVC decoupling
AVC decoupling
AVC decoupling
AVC

voltage

r-f coupler

coupler

plate

load

plate

load

time

constant capacitor

decoupling

plate

with a negative

rectifi.cation. However,

great

is

overcomes the fixed

function. In

possible

from

enough in

the avc

order to

as

avc

as

am-

bias

tube,

Reviscd

I Fcbvary 1949

+20.Ai

AN I6.3OARRI5.3

Section

Porogroph

lV

2.d.

In this

through

avc

positive

3

N

-ror

is

connected

part

the i-f signal and applies

of

manner, a strong

the

on

generated,

obtained.

voltage

capacitor

load. The

grounded

is

side

o
9 c-lt5

loo

:,

section A

cuit which

d-c bucking voltage to the delay bias on section

a

V-106

of

rectifies

B of V-106.
reduce

the delay bias
more avc voltage to be
ated avc characteristic is

frequency

is

obtained from the

avc

Radio

system

former Z-L2L

forms

R-121
section B of

the

V-106,
connected to the
through

resistors R-126 and R-132.

AMPLtFTER

r25G;;

in a rectifier cir-

tube and allow

avc

tJrus

for

operation

primary

C-L27.

grid

of the

the cathode

and

of the

YER

Nti

r2

SG7

+{-ro2

=

\! lE

:U

@ C-l l8l

iS

R
i

J

o'Pi

z-il9

signal will

acceler-

a.

i-f trans-

of

Resistor

avc tube,

plate

supply

aMPLTFTER.

F

of

the

r2

is

SG7

i{

ud

Section
rectifier
that

cancels

Resistor

filter to remove

age.

Suitable resistors and capacitors

in

the avc

trolled tubes

The avc

tacts

on the cw-mcw

A

V-106

of

circuit

which furnishes

out the delay bias on

R-125 and capacitor

all r-f

supply line at the

for

decoupling

circuit

of relay K-501 applies a higher

(delay

to become

? - ,^^

iz-tzo

;

3 T-e/

;=d

e

l8#,{

: tg7

bias) to the avc circuit and

partially

I

,.

J

|,.,+
l"o

inoperative

z-t2l

3it

is connected

and

audio from

grid

purposes,

is

connected to

relay,

K-501.

the bucking

section

B of

C-129 forrn

the avc

are connected

returns

a set

The

positive

causes

when

cw is

in

a diode

voltage

V-106.

of the

of con-

operation

potential

the

selected.

+{-8

N

d

a

volt-

con-

avc

BY

M

OTOR

D

OPERATE

AUTOT U NE

l__ _L_

NOTE: Unless

ductance values

l>r

\)

POWER

SWITCH

otherwise

MCW.CAL

CW

.n

-

\_/-

t-\

t1J

JI\

-)

a

_J

indicated, all resistance values

in microhenries.

are

Figure 4-13. Automqtic

in

are

ohms, capacitance values are in micromicrofarads,

Yolume Control Circuit

-!

4

4oo

L-il5

c-r56

soo

I

L-J

26.5V

TO

RE MOTE

POWER

rlc

sw

and in-

H

+2

Section

Pcrogroph

lV

2.d" AN

t6-30ARRr5-3

NOTE:

MIXER

is

I

'u

s-roe

/

L_- T-J

powER

SwrrcH

Unless otherwise indicated,
inductance values

in microhenries.

are

O
N

I

5-'31

all resistance values are

o^l?t

t-"n

; U

'11."

lz-'zo

1,,'-i3l

R-r44

zND IF

AMPLIFIEFI

l2SG7

-,

ohms, capacitance

in

2l

-l

:S

o

+

200v

values are

r--l

I

100

_-t t5

c-r5(

in micromicrofarads,

500

I
L

N

&

l^J*r%t.

cowen

2

|

lswrTcH

and

Figure +13A. AN/ARR-t5A

Aulomalic

Volume

Conttol Circuits

+22

Revised I .lonuory l95l

AN I6-3OARRI5.3

Porogrophs

Seclion

l.o.-1.d.

V

lNsPEcTroN.

l.

a.

GENERAL.-This radio equipment
constructed
obtainable
inspected and
tenance to a minirnum.

checking and servicing

of

efficient and dependable operation.

tain
ing sections have been
of the equipment.
vided

daily

tion,

PRE-FLIGHT

b.

pre-flight

the
equipment
are securely

(1)

switch

both are

that

terminal connection.

that

tain

of the

ture

clamps

hold the ciamp

that

certain

necessary, hand

If

rings.

ing

breaks

wires.

accomplishing

(2)
the operation
The
whether

position
warln

desired

listen

and

of materials. considered

for

into three

inspection and 100

is functioning

fastened.

VISUAL

(a)

Check

and the

(b)

Check

(c)

Check

the base

aircraft

(d)

Check the

the mounting base

on

(e)

Check

that the

(f)

Check

Inspect the

and loose

(g)

Check

(h)

Make all

OPERATION

following

not the receiver

or

(a)

Operate

and

up.

(b)

Advance

audio

(c)

Select

for a signal of

purpose

the

adjusted at

fhe

periods,

INSPECTION.-The

check

tight:

the

of the

allow

output.

is

INSPECTION.

the Autotune

TUNING control and make

the antenna and the

the mounting base

is securely

and

nuts in

remote control unit and

the

unit is securely

all of the

tighten all of

connections

the headphones

other

"purpose"

operational

the ON-OFF

few

a

the

each of

and

the factory to reduce

Ifowever, a certain

will be necessary

set up to aid in the

inspection

namely,

make certain

to

properly

grounded.

condition of

place.

interconnecting

interconnecting wires

checks

of

CHECK.-Before each

receiwer should be

is

seconds

VOLUME

the

ten

known strength. If

MAINTENANCE

has
to be the
been carefully

has

amount

to main-

follow-

The

checking

procedure is

pre-flight

hour inspection.

and

locks on the BAND

and make cer-

fastened. to the

and the safety

fastened.

the wire

at

check will

plugs.

the
for loose or broken

that may aid

this inspection.

operating

switch to

for

control

frequency channels

inspec-

purpose

that

that all

certain

ANTENNA

the securing

plug

checked.

indicate

normally.

the ON

tubes

the

for

a signal

SECTION

is

been

best

main-

di-

of

the

parts

struc-

wires

make

wires.

lock-

for

in

flight

to

the

ceiver

signed
complete
conditions,

spection for
the
this

stations
all channels

unit.

smoothly.

moval
searching visual and operating

to
and to detect maladjustnents
deterioration of components.

first step in
from the mounting base.

on
loosen
plug

unit

Disengage the Dzus
net
from

-fs

sis,

base.

connector

equipment,

check

are

V

heard

c. DAILY

(1)

(2)

pre-flight

page.

(3)

1OO HOUR INSPECTION.

d.

(1)

determine

(2)

the

and

from the mounting

and

the cabinet.

pgln6ve

pull

tight

each

on

may be

INSPECTION.

GENERAL. - The

to determine, in

equipment

maladjustments, breaks,

ViSUAL INSPECTION.-The

the

OPERATTONAL

(a)

PROCEDURE.

1.

Check the receiver for sensitivity

of known frequency and

2. Check the controls of the

Make

3.

GENERAL.-This

the chassis and should be a thorough and

of

the

REMOVING

the

nuts

two

nuts. Slide

the

plug

pull

the unit

(o)

REMOVING

the dynarnotor

the

out

The dynamotor

located

(b)

VISUAL

1. With
remove

commutator

the

2. Check
the

in

the frequency

of

assumed to be operative.

and

inspection is

daily

check.

procedure

at

receptacle

four

sockets.

Refer to

certain

amount

RECEIVER

the bottom of

fastener

forward to remove

snap

in the

INSPECTION.

the-dynamotor

the

the tubes

daily inspection

general,

the unit

rack and

TIIE

fasteners

will lift out

base.

dynamotor

and brushes

the

to detect any

paragraph

TNSPECTION.

signal

the

dynamotor

inspection

inspection

of service

and early

is

remove

to

Unfasten

the

forward

are disengaged.

place

at the rear

DYNAMOTOR

frorn the receiver

removed

make

to

channels

condition

etc.

the

remote

that is required

CHASSIS.-The

the

front

at the

of

end

for wear.

certain

the re-

is
of the

aggravated

visual

same as

1.

b.,

against

strength

control

is running

involves re-

designed

stages of

the receiver

safety wires

panel

until the

Lift the

on a bench.

the

of

cabi-

chassis

the

UNIT.

chas-

dynamotor

plug-in

the

from the

shields

that

de-

in-

for

on

on

and

and

all

5-l

Seclion

Porogrophs I

ceiver and
loose

components

tacts for

Make
Check the
VOLUME,

panel.

base

jack.

ing

V

3.

due

4.

5.
corrosion

(3)

OPERATTONAL

(a)

l.

2. Mounting

3. Connecting

4" Headphones.

5. Signal

6.

7.

(b)

certain

(c)

1.

and connect

2" Plug

3.

base.

(d)

1.

controls.

2. Rotate

position
CHANNEL

Autotune

TENNA
antenna
sistance

output.

position
to

against
on

5-2

and

3.

(e)

f.

terminal

that consists

and

2.

3. Rotate
and

channel

4.

the table

page

this

5. Check

cycle

RECEIVER

"d.-3.o.

Check

any

to

Check

Check

EQUIPMENT

Power

Dummy

Output

MANUAL

CW MCW-CAL

AUTOMATIC

Plug

Connect a ground

crrEcKrNG

Lock

selector

Select

Connect

Connect

one.
Check

all

the

parts

other

vibration.

the

capacitors,

for

corrosion

all

of the

pits.

and

REQUIRED.

supply-26

base

cable.

generator.

antenna-10

meter.

OPERATTONAL

all

the controls

CHANNEL,

OPERATIONAL

the

receiver

the

cable

the

headphones

PROCEDURE.

the

TUNING

the

ON-OFF

select

L00

rotate

of

channel

control.

each

of the

has

been

completed

SENSITTITY

a signal generator

of

the

receiver

of

10

mmf

of capacitance

an

output

the

ON-OFF

the

CHANNEL

the

sensitivity

of

"sensitivity

this

Handbook.

the

sensitivity

moving

that

and

TNSPECTION"

with

TIINING,

OPERATION

to

ohms

parts

may have

resistors

deterioration.

relay

and

volts

dc.

plug.

ohms,

are

operating

controls

CITECK.

unit

into

a 26.b

volt

into

to

the

receiver

and

BAND

switch

number

ten

channels

for

through

non-inductive

in

meter

to the

switeh

selector

of

vs Frequency',

on

all

AN

in

the re-

become

and other

switch

100

CHECK._

CALIBRATE,

on the

the

the

con-

mmf.

properly.

front

mounting

dc suppbl

pHONE

mount-

switch

to

the

one

with

after

each

channel.

CHECK.

to

the

AN_

a dummy

series.

receiver

to

the

switch

the

receiver

given

ten

channels.

I6.3OARRI5.3

2. VACUUM

ceiver,
the

ceed 28

of the

any of
equipment.

out of

that

which it

-

the
into

is

ON

the

and
nection
to be defective
so that

the

tubes
open
sion
operation
equipment

replace

re_

performance
after the

ON

3. TROUBTE

SENSITIVITY

Frequency

(mc)

Band

2.0

3.0

4.5

7.0

10.0

J.O.a

TUBES.

a" PRECAUTIONS

TUBE

(1)

make

OFF

(2)

(3)

rated

(

)

the

b. TUBE

(1)

the
(2)
the

(3)

tube

place.

c.

REPLACEMENT

discarded,

that

in

the

from

heaters,

or

any

all

ALL

PLIED
BE
MENT
STOCK.

a.

GENERAL.-In

LIFE.

Before

any

certain

position.

The

external

volts. (Normal

Oper:te

all

voltages.

Do

not

exceed

tubes

REPLACEMENT

All

tubes

sockets.

Before
type

is

When

pins

of

being

replacing

with

a tube

tube is

placed.

make

the

trouble

the

equipment.
it

should

tube

will

general

shorted

other

defect

of

the equipment.

have

been

the

tubes.
the

of

weak

tubes have

TUBES

OF A

\,WTH

CONSUMED

TUBES

OF

LOCATING

vs

FREQUENCY

Input

(uv)

A

B

c

D

E

ll

FOR

tube is

that

power

2.4

2.0

2.5

2.5

2.3

2.5

SATISFACTORY

removed

the

ON-OFF

suppiy

voltage

of the

tubes

within

the

rated plate

during

normal

PRECAUTIONS.

are

removed

is

correct

the

respect

by

replaced,

for

tubes,

to

the

OF TUBES.-Before

certain

is not

that

the

a loose

When

be disposed

not

become

stock. Discard

or noisy

which

elements,

would

If

continually

A marked

equipment

been

is

usuaily

replaced.

Note

GTVEN TYPE

fHE

EQUIPMENT

PRIOR

TO

FROM

IN

INSTAIIED

case

of trouble,

Output

100

100
100
100
100
100

from

the

switch

must

not

26.5

volts

dc.)

per

five

current

operation

pulling

the

properly

socket

tube
or

a tube

of immediately

mixed

all

the tubes

in

use for a year,

improvement

EMPLOY-

GENERAL

EQUIPMENT.

look

make

socket

and

is

broken

is

with

tubes

low

cause

noticeable

SUP-

SHALL

for

straight

certain

at fault

knowrr

simple

re-

is

ex-

cenr

of

the

into

orient

push

a tube

con-

gooi

with

emis-

faulty

in

the

in

in

of

AN l6-30ARR!5-3

Porogrophs

Section

3.o.-3"b.

V

causes
fore
the equipment.
study
save hours
often damaged
of

t=

first. Analyze

attempting

of the

parts.

b. LOCATING

(1)

.\utotune

motor

No

Receiver inoperative

Receiver

ative.

(2)

various

of haphazard

by needless

INSTALLED

mechanism

d.oes

signal

received

operative

INSTALLED

isolate

and

to remove

A few

TROUBLE.-Before

or

moments

possible

labor. Radio

disassembly

dismantle

causes

EQUIPMENT

Symptoms

does

not

rotate.

on one or

but remote

EQUIPMENT

the

of thought and

of failure may

TROUBLE

not

operate

more channels.

station

TROIIBLE

difiiculf be-

part

any

equipment is

and removal

the

of

receiver

LOCATING

and

dyna-

inoper-

LOCATING

Dynamotor does
not run
Autotune

i noperat i ve

unit

be

determined
i4g
be

made

without
eannot
checks,
aircraft

1. No

2.

Power

1.

Antenna

2.

Defective

3. Improper

1. Improper
locked.

1. Defective
switch

and

i

s

is

removed from

if

trouble

locating chart

to locate the trouble

removing

be located

the receiver

and

taken to a repair station.

CHART.

Possible

input

voltage.

source

open

headphones.

tuning.

tuning

headphones,

at the remote

BLOCK

DIAGRAM.

the aircraft

possible.

the

and repaired

Cause

voltage

or short

or

lt-he

and

receiver

unit must be removed

of

too low.

circuit.

a control

cable,

unit.

Check
supply

the

checks

block

which

unit.

Trouble

or controls un-

plugs,

power

voltage

houble

in

diagram

can

If

by the

wiring or

should

the follow-

should

be

repaired

the houble

following

from

the

Rece i

i

nope

r

ve

rat i ve

Check
p

adj ustments

Check
for

shorted ci

Check

C heck
control stat

(

for

roper tun i ng

anten

open or

headphones

remot

if

used)

im-

na

rcuit

e

ion

Check Autot
control

locks

une

>-)

Seclion

V

Pcrogrophs

3.b.-4.o.

l6-30ARRt

AN

5-3

(3)

REMOVING RECETVER

FROM TTIE

(a)

Remove the safety

MOUMIING

nuts that clamp the unit to
base.

(b)

pdll

the unit straight

from the

Usine the

plug-in

handles on

forward to release

connections

studs.

TROUBTE TOCATING

4.

a. PRELIMINARY

preliminary

checks
locate trouble in the
primarily
and equipment

of visual

(1)

EQUIPMENT

(a)

Power

performance.

AT REPAIR STATION"

CI{ECKS.

may be easily

receiver.

inspections of

REQUIRED.

supply-26.5

Symptoms

Equipment dead.

UNIT

BASE.

and

wire

shock

the

front

the

and rear

The

­performed

The checks

control

dc.

volts

loosen

mounting

panel,

the

mounting

following

consist

positions

thg

unit

(b)

Power supply

(c)

Voltmeter.

Range:

(d)

Ohmmeter.

0-10,

Range: 0-10,

(e)

Spare tubes.

(2)

REMOVTNG

-When

the receiver

shock mounting base,

cable

0-250 volts

0-100,000, 0-5 megohms.

CHASSIS
has been

proceed

plug.

and

dc.

FROM

CABINET.

removed from

follows

as

to remove

the

the chassis from the cabinet.

(o)

Rotate

to

rear of the cabinet,

the Dzus

a half

fastener,

revolution counterclock-

located'on

the

wise.

front

panel,

pull

the chassis

(3)

(b)

Using

the two

frorn the

PRELIMINARY

handies
cabinet.

TB,OUBLE

on the

TOCATING CHART.

switch.

power

primary

in

of Trouble

control

relay K-101.

circuit.

Possible Source

1.

Defective ON-OFF

2

Defective

e

Broken connection

primary

Autotune operative

Receiver

operative

electrically.

No

No

signals

plate

received.

voltage.

Receiver

Oscillation

in receiver.

but dynamotor

but will

not change

does

run.

not

channels

I

Defective motor
D5mamotor windings

2.

t

1. Defective

Open

circuits

relay K-103.

brushes.

in wiring.

2. Defective CHANNEL
Autotune

3.
proper

Autotune motor

4.

Defective tubes.

1.

2. Defective

plate

No

3.

4. Defective

motor brushes

contact.

winding oPen.

relays.

voltage.

circuits.

1. Defective dynamotor.

2.

Shorted
Open

3.
Defective relay.

4.

Defective

7.

Loose

2.

Open

Defective

4.

Open

1.
,

Defective

Defective

A

Defective

fi.lter or bypass

fllter choke.

tube.

wiring connection.

fil.ter or

bypass

bypass

relay

capacitor.

ground

contacts.

connection.
tube.
shielding.

open.

selector switch.

not

are

making

capacitor.

capacitor.

Signals

weak.

Weak tubes.

1.
,

3.

4.

voltages.

Low

Improper
Misalignment

tuning.

of

AN t6€0A R R t 5-3

Section

Porogroph

V

4.b.

b"

TROUBLE
(1)

TEST EQUIPMENT REQUIRED.

(o)

Audio

LOCATING

Signal

or Hewlett-Packard 200-C,205-AG.

(b)

Signal Generator-TS-4137U,-LP,-5

equivalent.

Range: 400 kc

Generator

(c)

Capacitor-.0l mf

(2)

PROCEDURE.

ment

trouble locating block diagram shows

procedure
trouble

symptom in
considerable

recommended

in

the receiver. With the

mind,

time may be saved in locating

trouble.

(a.)

ISOLATING

trouble cannot be located

the

AUDIO

1.

Paragraph 4

in

the

which

in

STAGES.

checks under

procedure

stage
locate

the stage

a. Connect

through

lator
second

a .01 mf capacitor to

audio

amplifier tube

x-108).

b. Connect

lead to

chassis

proximately

maximum

MCW-CAL

to

ceiver
the
enough

on. The 1000 cps signal should

headphones

time

temperature).

steps,
the

connect the.audio oscillator

following

sequence:

minal 5 on

minal

8 on socket X-107).

minal 4 on socket

tube,

ter

If a stage is defective the
between
heard
signal was heard.

2.

NOISE LIMITER.-If

ground.

c. Adjust the

1000

cps,
d. Adjust
position.
e.

Operate

position.

f. Turn the audio

if

the

for the tubes to

g.

Using the

check

(1)

Grid of second audio tube,

socket X-108).

(2)

Plate

(-l)

Grid

X-107).

(4)

Cathode and

(Terminals

point

the

and the last

DETECTOR;

BY

STAGE

STAGE.

Generator-Ts-382-A/U

20 mc.

to

(LP-5

Signal

recommended.)

(approximate).

The installed

-

for

the checking

receiver

study the block

diagram and

equip-

trouble

THE TROUBLE.-When

in

page

following

preliminary

the

5-4, the

stage

paragraphs

the trouble exists.

the output

of an audio

plate

the

of

(Terminal

the audio oscillator

ground

audio oscillator to

with maximum

output.

the VOLUME control to

the CW

MCW-CAL switch

oscillator

and

be heard in

circuits

procedure

points

audio driver

of

of audio

4 and

5 on

operative

are

reach

the operating

in the above

output

and in

the

driver tube,

plate

of noise

socket X-110).

(allow

lead

following

tube,

(Ter-

(Ter-

Note

trouble

where no

point

at

AVC AMPLIFIER

the

signal is

will

be

signal was

which

the

heard

AND

in

or

the

for

the

by

will

oscil-

the

on

3

ap-

re-

to

(Ter-

limi-

the

headphones
is

fed

to the

tube,

it is

tive

and
ceding
much

this

the

checked.

audio

oscillator

I

Benerator

I
lside

I

of

ARR-15,

generator

nal

trol

to

the

the

erator.

is

in

the

kc

and

the

operative.

3. IF

procedure

same
and

f.,

connect

erator

ing

socket

socket

socket

socket

socket

socket

to

sequence:

X-104).

X-104).

X-103).

X-103).

X-102).

X-102).

4.
TIPLIER
of

the

signal
amplifier
p-lier

and

the

signal
mixer
and
ceiver

nal

tube as

adjusting

TUNING

will

be heard

Do

not

the

high

before

under
section.

5. RF

is

heard

are

*'hen

checked,

rvhen

the

output of the audio

catliode

and

evident that

that

the trouble

point.

same

Use a

a.

through

or

to

b.

c. Adjust

These

manner

signal

and

Connect

a .01

crystal

pin

5 of V-10b

Connect

to the

proceed

the output

detector

the

chassis

the

maximum

d.

Turn

on the

e. ]Iake

position.

0

f.

signal will

Adjust

certain

the

be

AMPLIFIER

as in

the

the output

the following

a. Plate

b.

c. Plate

d.

e. Plate

f.

of

Grid of

of

Grid of

of

Grid

of tube

tube

tube

tube

tube

tube

OSCILLATOR,

AND

MiXER

generator

stages,

mixer

generator

the

oscillator,

stages

connected

in

the above paragraph

the

signal

dial

to

if

these

CAUTION

even

attempt

low

or

carefully

paragraph

frequency

reading

4.,

AMPLIFIER

the

stages

the

r-f

amplifier

plate

of

the noise

audio

the

must

stages

in

be

stages may

as

the audio

generator

in

as follows:

lead

mf

capacitor

CR-101 in

in the AN/ARR-15A.

ground

lead'of

ground.

receiver

VOLUME

position.

receiver

the

signal

heard

and

CALIBRATE

generator

if

the

STAGES.-Using

above

check

from

points

V-104

V-104

V-109

V-108

V-102

V-102

steps

the

(Terminal

(Terminal

(Terminal

(Terminal

(Terminal

(Terminal

FREQUENCY

STAGES.-If

is heard

through

frequency

may

be

checked

to the

generator

a like

frequency.

stages

are

to loosen

operative.

a

oscillator

the instructions

page

d.

b-6

STAGE._If

in

the

above

stage

may

oscillator

are

a stage

be

checked

stages

place

of

the

to

the

the

the

signal

circuits

b.,

c.,

signal

in

the follow-

the

by

leaving

g"ia

under

and

the re_

The

screw

in

units

in

this

a signal

paragraph
be

cheeked

limiter

opera-

pre-

were

of

the

signal

i-f

coil

AN/

sig-

con-

gen-

dial

to

b00

are

the

d.,

gen-

8on

4on

8on

4on

8on

4on

MUL.
signal

the i-f

multi-

of

tfru

step

sig_

in

e.,

f.

lcvired

Jonuory

I

l95l

5.5

Section
Porogrophs 4.b.-4.d.

V

I6.3OARRI5.3

AN

with the same
ment. Proceed

erator to the

(Terminal

(Terminal

If
MCW-CAL
but
in
tained
cfi oscillator when the CALIBRATE
the
inoperative.
graph

normally but no 100 kc check
when the cfi unit
dial,

INOPERATfVE.-When
in
to Paragraph
cedure to be followed
trouble
circuit,
trouble:

that
see if the

Incorrect voltage
wiring or

condition.
improper
sistors
An open
capacitor
the same
oscillation

resistance
the circuit.

ing
coils, transforrners,

in the above
termine

receiver

the

there is no

the CW

between

low frequency

4.)

the cfi unit or circuits are inoperative.

c. TROIIBLE

high

the

is known to exist in any

use the following

(1)
is known to be in

(2)

(3)

and other

(4)

(5)

the circuit,

of

(6)

d. r{rGH

receiver

as follows:

a.

Connect

plate

number

b.

Grid

number

c. Antenna

6.

LOW FREQUENCY

operates normally

switch

beat

position

the 100 kc check

(See

7. CFI ItNn.

LOCATING

low frequency

or

4.,

Replace the tube with

trouble is corrected.

Measure the voltage at

components.

Check

With the

With an

Replace

if the

the capacitors for an

A

shorted

voltages to exist and may also cause re-

capacitor

that is suspected with a test capacitor of

value.

An

no

or

signal

of both the

checks

trouble

LOIV FREQUENCY

oR

and signal

the output

of the r-f amplifier

8 on socket X-101).

of the r-f amplifier
4

socket

on

connection

is

in the MCW-CAL

frequency

or iJ no zero

oscillator

CAUTION

-

is

turned on by the

on this

d.

in

good

readings will indicate

capacitor usually

components to heat

be located by

may

open capacitor

to

receiver

fixed and variable resistors

ohmmeter and a schematic draw-

the continuity

check

relay contacts

any components

and

is corrected.

X-101).

OSCILLATOR.

when the

unit or

under

If the

points

IN A

trouble

oscillator units,

page

replacing

procedure

one of the same t5rye

condition and check to

be heard.

turned off, measure

operate the receiver

OSCILLATOR.

CAUTION

not attempt

Do

to disassemble any

generator

of the

on

the

when

beat

points

dial is

receiver

can

CALIBRATE

STAGE

is

known to exist

5-6 for the

oscillator. When

other stage or

to locate the

the tube sockets.

open or shorted

will

of the wiring,

and

relay coils.

found

adjust-

signal

tube, V-101

tube,

front

can be ob-

circuits are

above Para-

excessively.

shunting

cause

part

gen-

V-101

panel.

the

CW

position

switch

from

the

rotated,

operates

be heard

FOUND

refel

pro-

defective

will cause

the

noise,

the

defective

de-

to

of

the

high

or low

the

troubie is
within
unit
stalled
loosened
the

(1)

-

containing

frequency

is

i:r

a

Any frequency
be used
operative.

should be
disassembling

proceed

unit

the connector
correct.

minal number

to the above

terminal of

ceiver
lator unit
n€ction

MCW
cillator; check
CALIBRATE diai turned on.

for

kc

to

2000
unit. If no signal can be
is defective.

which

cover

tube

Hold the oscillator
when the tube is
being inserted.

known

receiver on

the

was

at the

or removed

calibration

OPERATTONAL

(a)

EQUIPMENT

a

beat

range

to determine if

(b)

PROCEDURE.

checked

as follows:

L

Measure

jack

2.

Unsolder and remove the

3. Solder a short
terminal-

4. Connect
the test receiver.

5. Twist

around

connector

to the

wire.

6. Turn the receiver and test receiver

7. Operate the

position

8. Tune the test

checking the low

kc for the

3000

(c)

REPLACEMETIII

I. Remove

hold the tube cover

off.

2. fnsert a tube

to be in

Before replacing

3.

to

4. If the

frequency

definitely

sealed cover.

accurately calibrated

factory

will be destroyed"

frequency

of 450 to

Note

measuring instrument

still in

while
part

any

4 on the connector

the wire

for checking the high frequency

the

good

ascertain

of the unit.

plate

the

to make cetrain

insulated

an

insulated

the

that

jack

MCW-CW switch

low frequency oscillator with

frequency oscillator unit

four

the

CAUTION

unit

pulled

of the

condition.

if the trouble

trouble

oscillators until

proven

Each

and

from

the

CHECK.

REQUIRED.

oscillator

kc

550

the oscillator

The

­the

and

piece

wire to

wire from the

is soldered to the

but do

receiver from 450

high frequency oscillator

heard, the

OF

seal headed screws

to the unit

to remove strain

out

proper

the fube cover, furn the

is corrected, replace

to

exist

oscillator

when

if

a unit

equipment

Receiver

­and having

to 2000

heater voltage

jack.

of insulated

not

TUBE.

and a tube

to

3000 kc.

may

unit

oscillator

receiver

To check

the voltages

wire from

the antenna

make

oscillator

and lift the

type that

is corrected.

i:r-

is

is

unit

before

the

at

are

ter-

wire

re-

oscil-

a con-

on.

to the

os-

the

to 550

or

unit

is

is

the

5-6

AN t6-30ARRl5-3

Section

Pcrngroph

V

4.d.

tube

cover.

IJse

new

rubber

and tube cover.

changes

(d)

5. Check
caused

REPLACEMENT

the oscillator unit frequency

by the

tube

FREQUENCY

I.

Set the TUNING

BAND

the

in

front

switch

2.

Remove

3. Remove
of the

oscillator unit.

4. Remove

"B".

the front

the dial

the Autotune head.

CAUTION

Do not
the Autotune

the receiver. The
chabsis
from the

connecting the

move the line

just

head

5. Disconnect

and remove the cfi unit from

cfi unit

four

by

captive screws

bottom of the receiver.

Loosen

6.

the Bristo

oscillator tuning

7. Urucrew the

screws

cillator unit to the Autotune

gaskets

now in

OF

OSCLLATOR

use.

HrcH

for

the

UNrT.

control at 3.5 mc

panel

from

shaft or the

the receiver.

of

the Autotune head

gears

removed.

is

bolted to the
which are observed

set screws in the collar

shaft.

which

casting

hold the

remove the

and

screws

for

and

in

mairr

os-

defective
removal

oscillator

of the cfi unit.

8. Install the
ceiver
front

using

plate

9.

of

Replace the

nections.

I0.

Reassemble

panel

front

the

(The

collar

but do not

which fastens

dial must

reassembling).

Do

not

until

all

been made

1I.

Unlock both Autotune

12.

Operate the CALIBRATE

position.

13.

Short or

allcw the l-f

14.

*Brr.

Tune the test

through

the

screws that

the defective

new

cfi unit

the space

oscillator

were

unit.

and

the Autotune
tighten

be set at

the Bristo

to

the oscillator

3.5 mc band

CAUTION

operate the Autotune

the foilowing

of

with

manuai

adjustrnents

tuning.

block the calibrate

oscillator and

the cfi unit

receiver

made

unit

removed

restore

head,

"B"

mechanism

controls.

dial to tJre

to

to 3.0

mc on band

by

in

the

from

the

dial

screws

unit

before

have

switch

operate.

the

re-

the

con-

and

in

shaft.

*0"

to

t.

TUNTNG orAL AT

sET

2.LoosEN

3. PLAcE

4.

TTGHTEN ser scnews

ser

$'sr'^,

scnews

3.5Mc

er

BETwEcN sroes rr

rr

@

@

oN

BAND

r'Bo

@

Figwe 5-1" Oscilfotor

Alignment

5-7

Section

Porogroph

ber
oscillator
ceiver.
the

R105iARR-15
cillator
be

lock
oscillator
mc
dial

3.0

should
tween
tuning
clearance
gear,

tuning

between

shim
should

ated,
the other
erly
slu!

stops
or
"force"

and
paragraph

for all

V

4.d'

15. Couple
the

4 on

untii a beat

The oscillator

os:illator

While

16.

zero beat

to

three and

at

heard

17. Turn
set screws

the

shaft.

higher

mc).

the

in

would

be set

18. With the
be approximately

fixed stop

the

platform,

coil

is

Item

shaft

the

between

tightened

be

Before

19.

manually

tune

to make

adjusted.

in the

the

and

equipment

the

It may

20.
band

the

8.

Check

21.

the

of

test receiver

the

frequency

high

note

must

with

shaft

listening

receiver,

with

one-half

TUNING

the

in the

(The

incoming

frequency

at 3.5

tuning dial

and. the

see

not 1/32

(B)

should

stops adjusted

oscillator

tuning

pass

d.

channels.

inch, the

figure 5-1

be

stops

the

and the

the

certain

not

If

Autotune

damaged.

mechanism.

be

stages

page

and

Autotune

from one

properly adjusted,

will

necessary

5-18

oscillator

is heard

turned

be

pliers.

thin

a

to the

high

the

tune

CFI signal

the

mc.

dial

coupling

signal

this band

on

mc when

set

1/32 inch

movable

Item A

set screws

on the

loosened

by inserting

which the

after

shim

mechanism
end

the oscillator

the

hit

gears

may

Do

for maximum

for alignment

the

reset

terminal

to

and

in

the

by

ou@ut

frequency

which should

to 3.5

collar

is five-tenths

therefore

oscillator

the

at 3.5 mc

clearance

stop

figure 5-1.

in the

front end

and the

a l/32

set

removed.

the

of

unit

the tuning
tuning slug
become

not attempt

re-align

to

results.

procedure.)

Autotune

l6-30ARRl5-3

AN

num-

the

tune

re-

test

grasping

the

of

os-

and

mc

the

on

the

is at

there

be­the

on

If this

large

the

of

clearance

inch

screws

is oper-

dial

prop-

is

end

stripped

r-f

the

(See

controls

which

the

tube

the

on
unit

cover"

any

fasten the tube cover

cover.

unit

from

the

the

the

front

all

3. Remove
plug

and

4. Remove

rounded end

5.

to the

Check

cover

that are

found defective"

and connector

tube cover and

unit.

three

of the

the

seal headed

unit

plate.

components'

which fasten the

Remove the unit

plug

to

pull

the

screws

and replace

€ri-*

*s

.{

6

-\

a

f

Figure

to

to

5-2. Disossembly

iS-,

'

tt€a:'

:.:>

Yiew ol

_9e

(

e.".i

f

HF

Oscillator

(

t

-D

-tr'6

v

r;

(e).

Do

pair
lator
ment,
this
procedure

outlined

5-8

REPAIRING

not attempt

the

either

unless

unit

outlined

as

section,

I. Remove

in

2" Remove

is available

is thoroughly

paragraPh

OSCILLATOR

CAUTION

to disassemble

high or

the

low

complete

paragraph

in

unit

(d').

eight seal

the

alignment

and
understood.

from the receiver as

UNITS.

and,/or

frequency oscil-

4, d.

the alignment

headed screws

re-

equip-

(f)

in

Figure

replace
tot..y

screws

tuning

and

thrust

inductor

grid

the

Disossembly

5-3.

a. REPLACING

grid

the

seal,

from the

ball

and remove

inductor

inductor,
unit

the

(1)

Remove

countersunk

(2)

slug with

bearing.

(3)

must

Remove

care

Unsolder

the

end

the

to

Oscillator

of LF

Yiew

COMPONENTS.

lead

tuning

the

slug,

further disassembled.

be

three seal

the

in the

holes

plate,

front

losing

avoid

to

from

wires

the

screws

three

plate'

screw or

front

lead

the end

the

which

To

-

headed

plate.

screw

grid

hold

t6-30ARRl5-3

AN

Section

Porogroph

V

4.d.

'To

(
the two
and
threaded
has been removed. The
seal
may be

Ieave the

is replaced,

but do

collar.

rotary
piate.

into the tuning slug.

the thrust end of the
ing before inserting the tuning
inductor.

bearing

place

three

around

the

nected

tighten
no
smoothly
tuning

sliding
one
Bristo

tube
covers
and

alignment
uriits
ceiver.
disassembled.

Revised

Bristo set screws

pull

this section of

end

of

pressed

is

pried

(5)

three screws

(6)

press

not

tighten the

(7)

seal into

(8)

(9)

(10)

and unscrew the

(ll)

the

screws and tighten

grid

in step

end

slug.

the collar until the spring is compressed

quarter

set screws into the rotary seal collar.

cover, using

and screws.

tested.

(f)

is important for

plate.

end

(I2)

(13)

the tuning slug and tighten the screws into

inductor base.

(I4)

(15)

the lock nuts.

play

can

and

(16)

of the extension and tighten the two

(17)

OSCILLATOR

the high

of

An oscillator must be aligned after

I. EQUIPMENT REQUIRED.

a. Navy

b.

Oven

l5 October 1947

replace the rotary

)

the lead screw, after

into a seat on the

out.

When

If the lead screw or

the rotary seal onto

Press the remaining section of

the

Grease the lead screw and screw

Place

Loosen the lock nut

Grease

Replace

Space the

Solder the wires that were

(3)

above,

Adjust

be

not

does

Adjust

Assemble

new

LM

-

in the rotary seal
the rotary

other

grid

the

slightly

Bristo set screws

countersunk seat on the

a small

lead

screw

bearing a

the bearing slightly

the rubber

the

into

the front bearing and

Repeat

felt

and

bind at

the

the cover,

rubber

The

unit must now be

ALIGNMENT.

low frequency

and

proper

Series

refrigerator

loosen

seal,

collar

seal off

the tuning

section

inductor

portion

slug

screws firmly.

Crid

place.

this

the lead screw runs

rotary

gaskets

operation of

instrument.

of the

front

loose.

the rotary seal

the lead screw

and the ball bear-

into

few revolutiofis.

gaskets

inductor evenly

procedure

position

any

seal

pluB,

rotary

plate

is replaced,

into the

grease

of

tuning

the

the

on

and re-

on the

discon-

of the

colIar, by

tube

on both

aligned

-

oscillator

the

being

the

slug

and

the

front

front

until

and

the

The

re-

on

to

Temperature

-40"C

1

volt
voltage to

strument

the oscillator lead screw

strument for 450 kc for the

(2000

tate

oscillator unit dial exactly
low frequency oscillator.
measure exactly 550
lator unit output
after the dial
tions).

lower, remove the
the
the variable

exact
the oscillator

unit

(158'F)

components

to

check

above
in

at the high
frequency
atuie

or
ing the
capacitors
whichever

above
satisfactory

using
PLATEMENT
LATOR

(-40'F)

2. PROCEDURE.
a. Connect

and 2 of the

b.

supply

terminal

c. Connect the

to terminal

d.

e. Adjust the

kc for

the oscillator dial

f. Note the dial

g.

plug

and the tube,

h. Repeat

number of

i.

in an oven

for

j.

seal the unit.

k. Repeat

any variation

1. Connect

steps

oven-refrigerator.

the

m.

range

from

-40"C

n. If

minus

one

temperature

of

is

o. When

steps

p.

instructions

UNIT.

to

f70'C

a 12

connector

Connect

to

terminal

Attach an indicator

high

the

should measure

has

If the

cap

capacitor

revolutions

frequency

Remove

that

several

within

Replace

(b.),

(a.),

frequency

Run

low

and

while

the

kc, compensate

plus

a

required

(1.)

to

unit

the

Install

OF

plug.

the

number 3 and

number 2 of

number

shaft.

frequency

to this

(The

kc.

rotated

been

frequency measures

screw that

on

compensate

to

setps e.,

range.

the tube

is

at a

hours

oscillator

the

the tube

the above

which

the

and

(The

frequency

slowly

(-40'F)

frequency

compensating

minus temperature

or

to correct

change

a

(n.)

When

be

may

hf oscillator

the

outlined

HIGH

range: Adjustable

(+158'F).

supply

volt

positive

the connector plug.

frequency measuring

4 of the

frequency measuring

low frequency

frequency.

setting and rotate

five revolutions

The

high

exactly

the unit and

top of

f., and

the dial will

of

cover

temperature

to dehydrate

cover

have

may

oscillator

(c.)

and

unit

and temperature

end of

changing

to

f70"C

drifls

for the drift

is

the

installed

paragraph

in

FREQUEI\CY

to

terminals

voltage

connector

knob

oscillator) and

frequency

frequency

exactly 3000 kc

is located between

for the error.

unit.

stePs

must be

more

capacitors,

the

made,

performance

in the

of a 250

the negative

and dial

oscillator

for

10 revolu-

higher or

g.

until the

place

and

of

+?0'C

age the

and

cap screw

and

to h.

a.

occurred.

unit as

place

the

sealed.)

oscillator

the

temper-

the

(+158'F).

than

replac-

by

coefiicient,

drift.

rePeat

receiver'

receiver

in the

(d)

OSCIL-

should

adjust

in the

charts

from

in-

plug.

to

in-

ro-

the
the

oscil-

cover

the

to

unit

plus

with

the

is

RE-

5-9

Seclion

V

Porogrophs

5-6.o. AN

t6-3oARRt5-3

REPTACEMENT

5

of the two dial

Each

panel

is illuminated
lamp.
impressed

ceiver
to
d(2),
to

The two lamps

across

chassis must

replace the dial lamps. Refer

page

remove the

6. SPECIAI.

MECHANICAL

a.

AND

(1)

AUTOTUNE
The synchronization
volves

positions
switch.
chosen
erly.

plished

the

of the cam

This

by the

The synchronizing

by the following

(a)

CONTROL UNIT.

1. Remove

from the

receiver.

2. Remove
ratus
accessible.
unit

that the front

so

It will not be

under

power

nor will it be necessary

Insert

J.

.
a number 10 Bristo
end

the
of
a sudden

the line

of

4.

red flag

control unit,

the

snap.

Rotate

5. Stop rotating

possible,.
into

at the

position

OF DIAI LAMP5.

by a twenty eight volt dial

are

26.5 volt

the

removed

be

5-1, in this section,

chassis from

MAINTENANCE.

ADJUSTMENT

REPAIR.

SYNCHRONTZATION.-

of

an

adjustment

of the

drums and

adjustment insures

switch

will

always

procedure.

the control

the necessary

of the Autotune

necessary

perform

to

to uncover

the synchronizing

wrench)

shaft.

the

shaft counterclockwise

observed

through

disappears

the line

point

where

under

the inspection

control unit.

windows on

wired

in series and are

the

supply.

from the cabinet

paragraph

to

for the

procedure

the cabinet.

Autotune

system in-

relative angular'

the

that the channel

selected

be

adjustment

knobs

and

pieces

is accom-

of appa-

units

to operate

the synchronization

the

control

wrench

into

the right-hand

the

hole

in the

and reappears

shaft,

the red

as

flag

opening

front

The

4e-

seeking

prop-

panel

are

the

unit.

(use

untii

top

with

near

as

snaps

in the

direction
and stop.

1,

the end of
turn

as

cated
the end
clockwise

the
wise direction.
the stop ring

clockwise

of

in a clockwise

shaft
direction.

clockwise
with
ment.)

ments,
synchronized.
lect
the
perature
motor
center
chronization
is found
item
staking

d.

(b)

7. Insert

unit.

8.

far

possible

as

9.

in

step

of the

10.

cam

drum

11.

(c)

12.

the cam

1-?.

/4.

by

rotating

/5.

the

Id.

Having

the

an

Autotune

parvls

rn

and with

the

of

to

that

has

compound.

Rotate the line

shaft in the

opposite

six to six and one-fourth revolutions

MULTTTURN

a number l0

the shaft

(Refer

to

Using the wrench,

in

While holding

loosen

B.,

cam

UNrT.

Bristo

of the cam drum

figure

5-4.)

rotate

the cam

a counterclockwise

the cam

the

nut

drum as indi-

that is located

shaft by rotating

wrench

of

the multi-

direction.

nut

the

into

drum

in

direction.

Again,

Tighten

using

as far

(The

before

the nut.

the Bristo

possible

as

pawl

making

in

must

this

(Rotate

wrench,

a

counterclock-

be

engaged

adjustment.)

in

a

counter.-

rotate

rviflr

direction.)

SINGi,ETURN

Insert

drum.

Rotate

the Bristo

(Refer

the

cam

UNIT.

wrench

to figure

drum

as far

into

5-4.)

the end

possible

as

direction.

Loosen

Rotate
direction.
stop

Tighten

Autotune

pawl

the

ring

To

slots

slot on
has
be

operating

been

the

nut

the

nut

the shaft

(The

before

the

nut.

completed

mechanism

check

channel

of

the

cam drums.

normal

should

be

both

been

checked

loosened

on the

in

as

pawl

end

a counterclockwise

far

possible

as

must

making

the

this

above

will

the

synchronization,

and

note

the

At room

voltage

applied

approximately

units.

and

After

the

properly,

with

a

drop

of the

cam

in

be

engaged

adjult-

adjust-

properly

be

position

tem-

to

in

the

syn-

mechaniim

secure

of

each

liquid

se--

the
the

on

a

a

of

Figure

s-t0

5-4.

Aulolune

Synchronism

Adiustments

(2)

Do
mechanism
ment
the
been

izing

trouble

AUTOTUNII

not

attempt

have

following

performed.

(a)

The following

in

CAUTION

until

been

tried

operational

the

Autotune

REPAIR.

to repair

all methods

and

have

chart

will

mechanism.

Revised

the Autotune

of

adjust-

failed

and

checks

have

assist

I

in

Jonuory t95l

local-

t6-30ARRI5-3

AN

Porogrophs

Section V

6.a.-6.b.

Symptoms

Autotune
tinues

instead

Erratic

Intermittent

One

system

to run,

of reversing.

operatiou.

operation.

will

unit

recYcling

not

tion.

Resynchronization

remedy

not

tioning

of unit.

non-posi-

con-

posi-

does

Possible

Motor

1.
operating
Timing

2.
ating
Motor does

3.

1. Faulty

cFrn.

1. Control

Check

1.
locked
out the
to engage

1

Foreign

2.

Broken,
spring.
"Sticky"

Source

reversing

proPerlY.

switch

cam

properlY.

not reverse

operation

contacts

unit

de{ective

control

unit

range

the

matter

unhooked

pawl.

rotation

of

Pawl.

in unit.

Trouble

of

switch

5-107

tuning

of

need

unit

knob

or

5-109

not

not oper-

properly.

switch

cleaning.

by rotating

through-

attempting

weak

Pawl

1. Clean,

2. Clean

3. Replace

Move

1.
wise
erate.
be
degrees).

Burnish

1.
glossy

1.'If
mearrs,
bly

1. Clean
Reattach

2.
Can

3.
gency

AN-0-4

and

until

a noticeable

pawl

the

neeessary.

be

by

Remedy

replace switch.

readjust

motor.

seeking

The

the

surface.

res5rnchronization

unit.

or replace.

made to

oil

or

adjust

the

Readjust

working

into the

switch.

switch 5-106 clock-

system

distance

contacts

can be

moved

amount

star cam.

engaged

operate

il a

pawl

begins

(about

to

a smooth

is

in

an

few

stack.

to op-

should

by this

proba-

emer-

drops

5

of

(3)
not

will
caused
age
treatment

clean
the

meter.

a
burns
the
ments
anns.

the

re-check

be.

the

has

and

relay

crocus

are

surfaces

carefully.

point

If a

RELAYS.-The

require

resulted

of
readjust

as

To

cloth

removed

the

If

tip end
until
relay

service

contacts

from

contacts'

the

you

would

the

clean

burnishing

or

parallel Make the contact

are

contacts

of

the

is

badly

to be

rough

relay,

a

an expensive

flat

from

not bend

Do

do

spring

the

spacing

damaged,

relays
unless
burned

handling

When

it carefully.

do

surface

tool.

contact

the

not close

siightly.

is exactly

equipment

this

in

a short

and

it

contacts,

the contact

replace

circuit

pitted

or

is necessary

watch

Make

points and

properly,

Check

what

or dam-

improper

Handle

or

only

use

certain

that

adjust-

spring

bend

it should

the relay'

has

to

fine

all

and

(4)

SWITCH

of switches

justing

of the

use of

and
relays,

AUTOTUNE

b.

nary operating

not require

will

the equipment.
ated
lubricate
ply

of
iubricators
cants
lubrication

in

cleaning.

and

switches

the.same

paragraph 6,

hot arid

in

a

the

the oii

into

recommended

chart:

MAINTENANCE.-Maintenance

equipment

this

The adjustment

should

matelials

(3),

LUBRICATION'

conditions

any lubrication

If, however,

climate

bearings,

oilite

retainers,

holders

the

are shown

primarily

follow the

as

page,

this

on

Autotune

the

the equipment

it may

replenish

insert

and

a

once

recolrrmended

for the

on

involves

and

procedure

same

5-11.

Under

­mechanism

lifetime

necessar5l

be

the oil

new worm

year.

the

The

following

ad-

cleaning

for

ordi-

of

is oper-

to

sup-

gear

lubri-

5-l

t

Section

V

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AN

Secion

V

(APPLY

'BEAR

CONTROL

BALL

TO

tNGs)

UNIT

o

BEARTNG

(aeelv

ON

BOTH

ro

BEARING

ENos

SURFACES

oF snerr.)

LUARICATE

EACH

LETTERS

ANNUA!LY.

ARAOW IN DIC AT €S

WITHIN BALLOONS

Figure 5-5.

MULTITURN

A POINT OF LUgRICAIION.

CORRESPONO

Lubrication

Chart

UNIT

LUBRICANTS LlSTEO

(Psge

one oI

IN

two

TA6LE.

poges/

5-r3

Section

V

Porogrophs

7.a.-7.b.

AN l6-30ARRI5-3

BALL

BEARING

LUBRICATE

ARROW INOICATES

EACH
LETTERS

WITHIN

Figure 5-5.

7. DYNAMOTOR MAINTENANCE.

o. BRUSHES.-RepIace
one-fourth
brush
fourth
brush

inch long,

pressure

is

inch or more of the spring

holder

when

considered satisfactory

the

brushes when less than

measured

to

extends

screw cap is removed
brush is touching the commutator.
may
slipped
over
able that

sanded in with a strip

be

under

a suitable

the

brush and

arc of the commutator.

new brushes

be run

pulled

in for

AUTOTUNE

ne\

/l1I]-\ Fffi

ffF{

\,

SINGLETURN UNIT

ANNUALLY

the

of. 4/0

back and forth

several hours

A POINT

EALLOONS CORRESPONO TO

Lubrication Chart

spring. The

if

one-

out of the

and the

New

brushes

sandpaper

prefer-

It

is

CASTING

)ry

\_/

OF LUgRICATION.

(Poge

no load,
fore the machine
When brushes
each
marks face
loose in the
a tendency
condition
temper

at

moved as

LUBRICANTS LISTED

lwo of

fwo

poges/

or a light load, to obtain the

is

are removed

brush in

the same holder with the

upward.

brush or end cap,

go

to

through the brush spring.

will

cause the spring to over-heat,

and fail

to

give

b. ARMATURE.-The

follows:

IN TABLg.

proper

required to carry the full

for

reason, replace

any

polarity

If

a brush

pigtail

is broken or

the current will have

the

proper

brush

pressure.

armature should be re-

fit be-

load.

This

lose

i

I

I

I

rl
1l

I

i

5-t4

(1)

Remove

dynamotor.

(2)

Remove the

from both the

commutator.

Notice
brush may
and in

(3)

Blow
windings
coils

the

at

remove the

lose the

to

c. COMMUTATOR.-A highly
tator
should
If the surface
mutation
be
evidence

commutator

a
with a cleaning fluid, such as
sene,
a dry
Remove
out
ing should also
wiping
nal
cut commutator
face, the mica
down
remove the armature
in

a lathe.

and disconnect the

to the

brush holder

(4)

Remove

(5)

Carefully

end

is

very desirable.

not

is

resurfaced. Slight sparkiag

of

gasoline

or

cloth. Keep the bearings

the end covers and blow the dust

after each

the inside of the brush holders and the

surface of the brushes. If any mica of the

the commutator

the covers

brush holder

high and the

CAUTION

that

each brush

be replaced

the same

the dust and dirt

brush

end shield.

be mistaken

is

satisfactory, the

poor

is

position

holder

terminals.

nuts from the clamp bolts

the

remove the armature

spacers.

smooth and

commutation.

dirty, use

for cleaning and

hours of operation.

300

include

extends up to the commutating

should be

or for extensive undercutting,

from the

from

both

caps and

low

voltage ends

is

marked so

in the

on

A

dark colored commutator

for

commutator should

a clean cloth moistened

petroleum

removing the brushes

undercut.

same

in the holder.

from the shield and

leads from the field

the high voltage

polished

a burned commutator.

polished

is not

If the 3urface

then rewipe with

and housing clean.

dynamotor

AN

ends of the

brushes

of the

that the

holder

so as

cornmu-

the com-

and

necessarily

spirits,

For turning

kero-

and dirt

This clean-

exter-

under-

place

and

t6-30ARRl5-3

bearings

placed
not
motor is

ation, no

hauls.

cover

screws

Remove

washers

old

chine

the

end

and

not

not

of

and

sur-

dirt from

grease

the

cover.
necessary

available
race
shaft

and

ing
both ends.
maximum
moved
clean
light

a light
be necessary
outer race
A
slightly
new
sure
pressed
reassemble
the

troubles
a d5mamotor

Porogrophs

d. BEARINGS

are

if

the

otherwise

overhauled
lubrication

To

lubricate

and

blow

that

the

from

grease.

oil

to

bearings

entering the

or

oil to drop

washers

If

the
to remove

to remove

fi.rmly

by

tapping

should

machine

small

inner race

on

armature revolves readily without

e. TROUBLES.

in a vice

holding

be done using

is

from

cloth

and

press'fit

should have a sliding

piece

larger

the outer race

onto the

the dynamotor

most

AND LUBRICATION.

designed for long life

bearings are loose

operating

out the dust

hold

retainer, being

the end
Apply
the balls and repack

with a

and the end

bearings are to

a

punch

the

play

End
perrnissible.

the housing, wipe

lubiicate

oil.

and

to find

of

than the shaft is

onto the shaft. Do not

shaft.

often

and the causes and correction of

satisfactorily.

after

each

wiil

be required

the

bearings,

and dirt.

the end shield

careful

of the shaft.

three or

small

onto the commutator.

the armature. If

the bearings,

and drive the

punch

The

some

one that

pipe

­encountered in the

four drops

amount

housing'and

shield bearing

be replaced,

against

lightly

washers

of approximately

the

inner race fits

with

of a bearing that is

After replacing

The following chart lists

the end

with a hammer.

Whenever a

the housing

housing sparingly

selection

is not

the end smooth

and make certain

Section

7.b-7.e.

but

the

on

300 hours

remove

bearing

not

Clean

the

of

clamp

bearing

equally divided

of bearings may

too loose.
in

fit

useful

-

should

shaft

If

the

of

between

the

Remove

retainer.

to lose

out

of light

outer

side

grease.

do not

Replace

retainer

it

will

puller

a

the

oft

of the shaft

.015 inch

bearing is

with

the shaft

the housing.

press

to

exert

a bearing,

binding.

operation of

The

be

re-

or if

dyna-

oper­over-

end

the

any

all the

ma-

of

Keep

allow

and

be

is not

outer

the

Shim-

at

re-

with
with

The

and

pres-

being

that

the

each:

V

a

a

5-r 5

Section

V

Porogrophs 7.e.-8.b"

AN t6-30ARR|5-3

Symptoms Possible

D5mamotor

fails

stops

to start"

Excessive arcing at

brushes.

the

or

1.

2.

3.

4.

5.

6. Defective

1" Poor

2"

3. Brush

4.

5.

1. High

2" Dirty

1.

1.

2. Armature.

3. Worn Bearings.

Cause of Trouble

or loose

Open
Shorted capacitor.
Brushes
to a

dirty, sticky

tion.

Poor

commutation due

oily

or rough commutator
mica"
Worn bearings

to strike

commutation

oily or rough

Brushes

to a dirty,

tion

or

a twisted

spring

Short between

in

Open

armature

mica causing

ing.

commutator.

Sparking
from

shorted

connection.

Armatuie

connections.

not

seating

pole

faces

arrnature.

commutator.

not

seating

sticky,

weak or defective.

commutator bars.

at

commutator

or open capacitor

striking

properly

worn

or

due

condi-

to dirty,

high

or

causing arrnature

or connections.

due to

properly

worn

or

dirty,

due

condi-

pigtail.

coil.

excessive

arc-

resulting

internal

wiring.

or

1. Tighten

2.

Replace capacitor.

3.

Remove brushes
clean
with 4rl0

connections.

thoroughly.

sandpaper,

brushes.

4.

Clean
If

commutatpr

commutator
down conmutator
mtca.

D.

Replace

6.

Replace

Clean

1.

bearings.

defective

commutator
If commutator
down

with a lathe

mica.

,

Clean

connector

brushes,

or

sembly.

3. Replace

4.

Clean slots

5.

Replace arrnature.

1.

Turn
lathe

2.

Clean commutator

1.

Replace capacitor.

brush assembly.

down commutator

and undeicut

nections.

1.

Rearrange internal

,

Replace bearings.

J.

Replace

bearings.

Remedy

from

Seat

replace

and

is

rough,

and'undercut

armature.

and

is

rough,

and

untwist

replace

or replace

mica.

and

Tighten

wiring.

holders

and

brushes

worn

brushes.

turn

brushes.

turn

undercut

pigtail

brush

armature.

on

brushes.

con-

as-

a

ARMATURE

f.

reduced
low

ing
conditions
pairs
the high
between one

per
ings
or

8.

speed,

output voltage

may be shorted.

exists,

of adjacent

voltage

pair

cent higher

between

other

shorted winding.

RECEIVER

AI.IGNMENT.

a. GENERAL.-The

quired

si3nal

and
output
put

screwdriver

The i-f
ment

to align the

generator

1500

to 18,500

meter

impedance

I-F

b.

CIRCUIT

channel should

will

be secured

suitably

alignment

5-r6

WINDING

excessive

arcing

indicates

When

measure

commutator

end

of

the

of bars which

or lower

pairs

than
of bars

following

receiver

covering

the range

kc, an

matched

of

300 ohms, and

tool.

ALIGNMENT

be

aligned first"

by the

TEsT.-Overheating,

at

the brushes

that

an attnature

one

or more

the

resistance

bars,

commutator.

is

the average

of

particulaiiy

more

than

indicates

the above

between

A

reading

of read­an

equipment

r-f

and i-f

adiustable

to the

circuits:

450

to

range

receiver

550 kc

a non-metal1ic

PROCEDURE._

Proper

following ptoc-drr.u,-

wind-

on

seven

open

is

re-

a.udic

out-

align-

or

A

t9

z-t

(v-ro2

PL^TE)

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(v-roi

Caro)

zn20

prat

(v-ro3

zn 20

(v-ro4

cRro)

(v-

ro.

z-t2l

(V.Io5

PLATE

Figure

EAND

PASS

rRcu

c

ANTfI]ilA
COUPLING
CTRCUtTS

5-6. Tuned

Eond

IF

TRANSFORMERS

FILTER

rT5

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(BANo

Circuit locoting

Poss Adiustments

Revised

-

faaNc

8)

c)

Diagrom, lF

I Jonuory

z-ro9

(aANO

(BANO

z-t

(Bafl0

z-il

(BANo

z-toa

(aANo

Z-[5

(BaND

z-il.3

(6AND

z_ilo

­(aANo

\

Z-lO7

(saNo

Z'ttl

.

ANo

Z-|E

faaNo

z.tot

(AAND

and

l95l

F)

C)

t4

.

D)

1

E)

F)

c)

D)

E)

F)

B)

a)

F)

AN l6-30ARRI5-3

Porogrophs

Section

V

8.b..8.c.

(1)

Adjust

(2)

Connect

generator

(pin

any

to

J-111

irom the

kc,

500
lation

to

"warm

tion

output

lncrease

found

signal

tor
in output
generator

the
reading
alignment

avc threshold

the

overcoupled,

a

ing

aligning
found
receiver.

(10)

graved

to the control

4 of

No.

convenient

(3)

Connect

and

(4)

Remove

receiver.

(5)

Adjust the

minimum

on.

(6)

Turn on the

up" for

(7)

Advance

control

meter.

(8)

Increase

the output

where

does

until

output

must

since

(9)

Since

10,000

these

clipped to the

Refer

Insert connector on

"piobe"

the receiver for

X-102). Connect

the output

adjust the

frequency

signal output,

until a

the signal

a further

not cause

meter

reading.

a drop

meter

not

it indicates

level.

the

a special

resistor

ohm

transformers.

to

located

c-L25.

(11)

Refer to Figure
receiver
three
of

the
adjust
for

shield

minal
bered
and 6-4)

Repeat
and

in the

interaction between

wiil be found

numbered

holes

V-104,

V-103

and

(12)

Contact

coaxial

i-f

slug

maximum

numbered

with

"2" orl

for maximum output

procedure

slugs

3-4.

Care must be exercised
tenuate the
alignment

meter reading

level

determined

do this

the i-f cireuits.

(13)

Repeat the

same manner

the

cable is attached,

numbered
output. Through

"2"

probe

the

i-f

the

for

signal

procedure

result

may

MCW operation.

the output

receiver chassis

meter for

signal

receiver aud

least five

at

signal

the

deflection

meter

increase

of several
reading.
be exceeded

first two

alignment

chassis

Figure 6-8.

on

to have a shield
2-3-4located over the

sockets

terminal on

cortf,aet the

and adjust i-f slugs num-

platform (see

transformer

CAUTION

does not

in

step

adjustment
as outlined
the circuits.

lead of

grid

of mixer

the

meter

the

multiplier

generator

1000

minutes.

generator

is obtained

generator

range until

in signal

a corresponding

Attenuate

db

This output

a safe

i-f transformers

provided

is

The

ih

the left

probe

the mounting

6-7. The

X-103

with

the i-f

on

"1"

transformer

meter

to constantly

generator

so

that

rise

(8).

in

misalignment

of i-f

to correct

the

tube

grounded lead

point.

output

to

lowest

tube

for

cycle

allow

output

a

the

observed in

is

during

margin

probe

be used

to

probe will

side of

in the

left side

containing

and X-104.

Z-L79, to which

probe

the

hole in the

the

figures

readings.

terminals

during

the output

above the
Failure

slugs t-Z-3-4

signal

V-102

jack

range.

V-109

exactly

modu-

unit

the

attenua-

on the

and

point

genera-

increase

signal

meter

receiver

below

are

contain-

the

jack

en-

board of

of

the

pins

and

platform

ter-

5-6, 6-3

2-3-4

at-

to

of

for

any

is

in

be

(14)
generator
"humps"
curve
cedure.

and

output
found
each.
sponse possible
band
i-f

slugs l-2-3-4.

c.

plier

of

L-101
C-143. The
MULT.
5-6,
C-141,
side
driver
holes
figu-res

ceed

erator

Rock

back

that

obtained

Record

the

output level

(15)

Adjust

in

such

in

step

The

object is

width

Figure

MULTIPLIER

is

6-3, and

of

in the

as follows:
(1)'

obtained by

5-7, Tuned Circuit

aligned by

and

the adjustment

slug adjustment

and

can be located

C-L42 and

receiver

.the
adjustments

shield engraved F,

5-7,

and.6-6. To

Connect the output lead of

to the

antenna

the frequency

forth

and

will

be

by the

the frequency

obtained

i-f

slugs

a manner

(14)

to

obtain

to

while

9I

\__-\___J

MULTIPLIER

c I Rcul

Multiplier Adiusi

ALIGNMENT.-The

means

6-4.

Variable trimmer

C-143

and

are

terminal

slowly

present

preceding

b and

as

to favor

an

obtain

still maintaining

procedure

the

q

T5

Locating Diagram,

the

of

of C-141,

for L-101

by referring

are located

the slotted

accessible

align the

control

in

on

of

the

to

locate

the i-f

of

these

each.

6

equal tu.ponse

the

response

tuning pro-

,,humps,'

for

maximum

,,humDs',

the

maximum

the

for

@

T

@

tr

@

i-]

[--t

ments

slug adjustment

C-L42, and

is engraved

to figures

capacitors

on

the right

shaft

screw-

through

E and

of the receiver

B.

Refer

multiplier,

the

signal

signal

the

on

re-

i_f

tuning

]

multi-

the

to

pro-

gen-

and

Revised

I

Jonuory

l95l

5-r7

Seetion
Porogrophs

V

8c-8d

RESTRICTED

r6€0A R Rl5-3

AN

grounded

connect

ceiver

J-111,
the
for at

the
cycle

on the
away
TUNING

quency
signal
avc threshold
under

near the end of travel out of the multiplier coil.

to adjust
hole
output

the
cycle).

of

quency

mum output. Repeat
satisfied

"tracking"

(8.5
control
outlined

shieid

(2500-3500

shield

DURE.-To
ceed as

the
from
ING

quency
the signal
avc threshold
under i-f alignment

ing slugs.of

5-r

the

chassis

(2)

adjust the

receiver on

least five minutes.

(3)

BAND

band

(4)

high frequency end of the band,

from the

(5)

generator

i-f alignment

(6)

(7)

engraved F

meter.

(8)

low

the TUNING

(9)

(10)

(11)

to

(12)

hole engraved E

(13)

(14)

hole engraved

d. RF

(1)

high

the

control.

(2)

(3)

point.

Connect the output

Loosen the

selector control for the

(band

Rotate

Adjust the signal

arrived at on the receiver. Adjust both

Check the

Use a

Rotate the tuaing control

frequency

Back

Adjust

arrived at on

Adjust slug

that the

Set

12.5 megacycle) and return

to

in step
Adjust trimmer

Set

Adjust trimmer capacitor

follows:

Rotate
frequency end of

stop

Adjust the

arrived

Check

the

stop

control.

level as outlined

non-metallic

trimmer capacitor C-143 through shield

away

with the mixer

the BAND selector control

the

high

the Band selector control on Band B

kc band).

BAND PASS

align

the TTINING control to the stop

from two to three turns

generator

level as outlined

the band

the band cr bands to be

8

lead to any

meter

receiver for MCW operation,

and allow

Autotune locking keys

F).

TUNING

foom two or three turns of

and the ou@ut

procedure.

MULT.

for

end

from the stop two

control.
the

oscillator

foequency

(4).

the r-f band

at on the receiver.

and the output meter to find the

procedure.

the

generator

slug to make

alignment screwdriver

a maximum

of band F

signal

the

B for

signal

generator

receiver.

engraved.

(4)

steps

multiplier

circuits.

capacitor

for

maximum output.

maximum output.

ALIGNMENT

the

band, then back away

generator

pass

convenient

to ou@ut

ttwa::n

to

unit

and set

L2.5

control

meter to

in steps

indication

(12.5

MULT. for

through

end of the band

pass

in

steps

and antenna coil tuh-

18.5 mega-

to

to the stop

then back

to the

find

(7)

and

sure it is

on

to the stop

18.5

to

or three turns

the

C-142 through

C-141

channels,

aligned

mega-

to the fre-

(10)

circuits are

on band E

TTINING

through

PROCE-

the TUN-

of

to the

Adjust both

(7)

and

to make

re-

jack

tum

up"

the

fre-

the

the
(8)

the

at

maxi-

until

as

pro-

on

I

fre-

(8)

RESTRICTED

.3r5I$1

ctRcutrs

\

Figure

sure they are
respective

5-8. Tvned Circuit

ond Antenna Coupling

Poss

near the end of travel

(Refer

coils.

8-e.)

(4)

Loosen the screws

covers of the alignment

pass

band

and
the length of the
holes.

will

corresponds

and

6-3
driver
to the

bered
Adjushnents

ginning
adjustment

and
number
bands,
raised.

mum
back

ceed

band
tuning
low

the

(Refer

(5)

Stamped

be found a

the associated

and 6-4.

to adjust the

band it is desired

(6)

Trimmer

consecutiveiy

with

and

slug adjusbnents.

of tuned

increasing

(?)

Each

reading on

the sigrral

ofi

the avc

(8)

After the

is

adjusted

control

frequency

stop two or

(9)

Find

assemblies,

coil

slots thus exposing

to figures 5-8,

on the cover adjacent

letter and a

to the band

slug

a non-metallic

IJse

trimmer

and slug

beginning

any one

for

highest

the

proceed

circuits

nrrmber

in

trimrner

the oufirut

generator

threshold

high

according

should

end of

turns

three

frequency

the

Locating

Circuils Adiusfmenfs

figures

to

holding the

holes

and slide these

6-1 and 6-2.)

indicated

as shown on

capacitor

adjust.

to

adjustments

with the antenna

band should

numbered.

lower

to

It should

varies

should

level

be

the

be adjusted

meter,

output so

determined

frequency

to the

rotated

band.

the

of

with the

Revised

Diagram,

Band

out of
6-3, 6-4

5-6,

protective

for the antenaa

covers

alignment

the

each

to

number.

on the tuning

alignment

numbered himmer

be

with the frequency

the

as

above

to

Back

TUNING

The letter

figures 5-6,

screw-

corresponding

are

be made be-

trimmer or

noted that

frequency is

for maxi-

taking

end

the

l5 October

care

not to ex-

as

in

step

a

of

precedure,

stop at the

away

control.

signal

gener-

their

and

coil

hole

dial

num-

coil.

slug

the

(2).

given

from

1947

L

to

AN t6-30ARR|5-3

Seclion

Porogrophs

V

8.d.-9.e"

ator and
for

satisfied that
"tracking"

on any

9.

a. GENERAL.
treatrnent
ganic

short circuits,
densation
growth
likely
together, attached
formers,
wires and their
instructions

tion equipment

SA salicyienilide
ing
used on
condition might be

either by the design

contact

b. COATING

more than fifteen

tain

matter.

so that no injury
personnel

c. PREPARATION

that the coating
pletely

blies,

expose the
treated cables
the underside.

that
foreign
herence

Scrape oft all visibie deposits

solvents

thin coat

a

ing application
performance
examples of

adjust the

maximum

(10)

Repeat steps

with the

given

TROP|CAUZAT|ON.

of communication

coating

prevalent
fungus.

of

to

occur, are usually

etc., in

for

a mercurlr-bearing

part

any

packaging.

thru

(l-)

INSL-X

(2)

This coating

(3)

The coatiag material

percent

20

(

The

)

(1)

the case,

(2)

they

(3)

(a)

dried film is non-toxic

hsndling

Expose all

ell

over

parts.

Clean

are free from

matter

proper

or

is not advisable

of rosin

Mask

of

surfaces which

Contact

correspondingly

output

the

mixer and antenna circuits are

band.

-

to help

due

to excessive humidity and

in

The

to tube sockets,

other words,

points

the tropicelization

deals

air dry. Coating

of the

placed

of the sub-assembly

IVIATERIAL.

#27-SA

minutes and dry hard in

or more

or skin-irration

the treated

parts,

may be appiied

surfaces to

cans, covers, shields

Where

and loosen terminal

all surfaces

which

function

over a

all surfaces or

will interfere

the equipment.

portion

meter reading.

(1), (7), (8)

oscillator multiplier circuits

Tropicalization

prevent

the tropics and the resultant

places

where wires are soldered

of connection. The following

with the

fungicide

equipment which under any

near

contains

will air

by weight of non-volatile

FOR

circuit

practicable,

of

dirt, oil,

would

here as it

large

of: binding

designated slug

(9)

and

is the overall

equipment

arcing,

where shorts are most

on any exposed bare

use of

a selenium

dry to touch

as apphed

equipment.

TREATMENT.

efiectively and com-

be treated.

parts

interfere

of the coating material.

rosin. The use of

of

area.

parts

with the

The following are

not

are

with an or-

drifting

capacitors, trans-

communica-

of

INSL-X
material
should

salicylenllide.

to human beings,

will be caused to

elements, etc., so

are removed to

bend back

boards to

to be coated so

grease

with the ad-

tends to

where the coat-

operation or

to be treated.

until

anc{

con-

#2?-

contain-

never

rectifier,

by

or

close

in

hour.

one

must con-

assem-

On

un-

expose

or other

spread

posts,

con-

not

be

nectors,
switches

or
contact
relays.

cables
electric

using

pletely
parts,
safely
terials.

in

d. METHODS

particular
sure
by

give
give
and

derections
plete

the spray should
tion.

ing,
prove

large

tainer

cans.
fumes.
ing
hard

parts
with ordiaary
ning,
into drops. Apply
fiim shall
fects

e.

well ventilated room, to avoid
of solvent fumes.

fuses,

(b)

magnetic

fingers,

(c)

rvith

capacitors.

(a)

Tube

dummy

(5)

All

dry.
if
below

(6)

The

painting

(1)

Spraying.

(o)

applied

actual experimenting.

wet,

a

a dry spray. Too

sags.

(b)

coverage with a wet

(c)

(2)

Brushing.

(a)

brush

more

(b)

enough

(c)

possible.

as

These

Evaporation

changes in

apply.

to

'(d)

to be treated,

lumpirrg,

such as bubbles and wrinkles.

DRYING.

(1)

Drv the equipment under a hood, or

jacks,

and variable capacitors.

Surfaces which

contact such

Components,

plastic

socket contacts

tubes to

surfaces to

Preheating

so,

the
the

same masking

may

Use a spray
operation.

to

the

even coating.

Spray the equipment
arrd angles as is

Surfaces that

On components requiring

application of the

efficient than spray application.

Use a

to admit the brush.

Place

precautions

viscosity which make the

Apply the coating

painting

or

have a

keys,

rub together

as those

potentiometers,

parts,

insulation,

protect

be coated
may be necessary

preheating

point

which may damage

materials

utilized.

be

APPLICATION.

OF

gun

of a size

The correct

gun

spray

The ideal

Too

wet a spray

necessary to insure

coat.

can not be reached with

be finished

container

as little coating

Always fill

minimize

is

also minimized,

with

the

or varnishing.

gathering

in

clear smooth finish

such

of the

a manner

plugs,

temperature

with a brush applica-

with an

containers from safety

sarne

relays,

shafts,

and materials

ceramic

may

be

points

must

ordinarily

suitable

amount

should

coating material may

to

be determined

great a pressure

may

from

extensive

material in the

danger

tfre

surface of the

precautions

coating material

possible

sockets,

for

electrical

in:

bearings,

shields

or

masked

of

contact.

pressure

as many

opening

from

thus avoid-

Avoid

that the dried

free from

toxic

such

mica

be

to dry

must

the

to the

of

give

mask-

material

efiects

and

com-

ma-

used

pres-

will

will

runs

com-

just

con-

toxic

used

run-

in a

as:

di-

by

be

di-

de-

5-19

Section

PorogroPhs

V

(2) The

(?0'Fi

and

in

"J"#g

liquids.

of

PROTECTTON

f.

gi""t"tt danger

ni"

9.e.'9.f.

temperature

3?.8'C

get

to

order

should

(100"F)

'

The

quick, complete

FROM

from

TOXrc

any

possible

between

be

air

EFFECTS'

AN

ZL'L"C

be

must

evaporation

efiects

l6-30ARRl5-3

be

cir-

-

will

drying

noirequired

is

allergic
,ru""t="""y

preserit,

is
qulr

at

the

will

to

would

moment

minimuze

compounds

the

where

only

wherever

or

require

of

except

this

evaporation.

danger.

this

the

for

used.

heavy

a

concentration

use of

the

precaution'

Proper

Special

people

few

Respirators

paint

or

care in

clothing

who

will be

of spray

clear

are

lac-

*x,

NOTES:

1.

32,25C

o

22O,23OD

2?O,

?30D

0

Test

Instruments

(a)

1000 ohms

TS-297/U

Weston
Simpson 443

(b)

20,000 ohms

TS-352/U
Navy
Simpson 260
Hickock

per

Multimeter

663

per

Multimeter

"OE'

133 |

volt

l ,,

arternares

j

volt

I

alternates

|

AN t6-30ARR|5-3

or

or

2.4.All readings
age of 27 volts.

First reading
meter

and second reading made with

per

ohm
If

tical with both
Meter

volt

only one reading

scales

A-2.5 v

B-10 v

made to

made

meter.

meters.

(letter

C-50
D-250 v

ground

with

20,000 ohm

is shown,

sufrxes)

v

with

values

as follows:

are

P-

input

per

are iden-

301

volt-

volt

1000

Scction

V

27c

27C

r90,

20o D

22O,23OD

t0o/

too

D

l85D

l8o,

Y.ffi' P.

-@f-l

oooooo

| ?a

|

90, 2OO

220,2300

r95,2000

225,235D

200D

r.75

9O,7

27C

I

g5/

-.75A

D

A

5D

Rcviscd

22O/ 23OO

t.25A

-

15

Qdobcr 1917

Figwe

r30D

2A

220,23QD

REAR

5-9. Yoltage Measurements-Righr Side

s-2t

Seetion

V

r6-30ARRI5-3

AN

NOTES:

1. Test Instruments
(a)

1000 ohms

TS-297/U Multimeter

Weston

simpson

(b)

m,000 ohms

TS-352/U Multimeter or
Navy
Simpson
I{ickock 13i}

r3c

r90,

200D

per

volt

)

6&3

alternates

443

i

per

volt

"OE'

'l

260 [ alternates

J

.dll readings made to

2.
of 27 volts.

age

or

2

4.

5.

reading

First
meter ancl second reading

per

ohm
If only one reading is shown,
tical
Meter scales

volt meter.

with

both

A-2.5 v C_SO

B-10 v

(letter

ground

with 20,000 ohm

made

meters.

suffixes) are as

D-250

v

v

wittr

made

values

input

per

with

are iden-

follows:

volt-

volt

1000

22O,23OO

225,235O

7

5,7OD

2?O,?30D

22O,23OD

22O,23OD

2?O,230D

-12, -8C

t60,75D

'

22o,23oD

220,230D

o

31,24C

47,34C

75/

65D

205,2t 5D

il5/25D

65,50D

220,230D

t20,75D-

47;7!l

220,230D

70,65D

27C

|,24C

3

2O5,2t

5D

t9o, t95D

2?O,23OD

|

75, | 80D

il

25D

5/

t20,25D

-6,
t3O,7

18

5D

70D

27C

27C

27C

o

0

o

27C
27C

27C

27C

7C

27C

27C

27C

?7C

0

0
22O,23OD

2O5,215D
220,230D

5-22

Figure 5-lO.

Voltage

REAR

rtleosurements-t'eft

Side

Revised

15 Octobcr

1947

NOTES:

1. Test Instruments
(a)

1000

TS-297/U
Weston

(b)

20,000

TS-352/U
Navy
Simpson
Ilickock

P-201

ohms per

Simpson

ohms

'OE"

volt

Multimeter

663 L.

443

I

per

volt

-Multimeter

1

260

|

133

)

or

alrernates

or

alternates

AN I6.3OARRI5-3

2.

All

readings made

age

a

First reading made
meter
ohm

A

If

only one reading
tical
Meter scales

A-2.5 v
B-10 v

27 volts.

of

and second

per

volt meter.

with both meters.

(letter

ground

to

with 20,000

reading made with

is shown, values

sufiixes) are as

C-50

D-250

with input

v
v

ohm

volt-

per

volt

1000

are iden-

follows:

Seciion

V

r3c

190,

200D

o-

22O,230D

| 17, I

lzD

ll5,25D

2A

llo,22D

90,

200 D

22O,23OO

225,235D

7

5,7OD

??o,?30o

220,2300

22Ot23OD

t9o,

t95D

?2O,230O

| 75/ | 80D

-,5A

-t.65,

-tz

-toc

-1.55, -.5A

70D

| 55,

27C

27C
27C

Revised

0

,rr,uro

-

2o.o5, l6ct;3,1.75A

1.25, I A

l.42, llTD

2t2,202D

I Februory

1949

228'2380

2t5,l40D

2O.5,18C

27C

75,65D

to.o5,

to.tc

20s, zt'D

Figure

5-lOA. AN/ARR-I 5A Yoltoge

o

o

-

228,237D

23O,24OO

22A,237D

o

206,2lO

22O,23OD

D

o

REAR

*leosurements-Left

Side

5-22A

AN r6-30ARR|5-3

tb5za

Bo.i,!]

Scction

V

'a

*

E3l's

3

;

o

@

n,

o(J(J

OOOONNOO(\r

\

qr

FFF

qr

I

:;

$

E;

=;

Ai

.er4--

05

t=--

lirs

:

€F;

5

I

ep## 3pEri#

HN

?.^

(,F{i:=
u:

(!

-:

otr

*E

fti le

::;

glr;E

sE€

fiE;E

cri

5!

r!.6
qrr"iF

6

t

*

a
cE

>

H

6.,.?>>

g:i

fE $"-

I.,

ir

r+q

g"d

g

ri

S

:

6

_;

>.

ri--

iii,RE

siq?as

:z

<.

o

F

I

N

Rcvised l5

October

1947

Figure

coc
occ

5-ll. Voltage

Meosuremenls-Bolfom

J

Section

V

co

300

iloK

320

AN l6-30ARRIs-3

NOTES:

I. AtL

l.@=tNFlNtTY

READINGS
FROM TERMINALS
TO

GROUND.

P-301

260

8K

300

I.5MEG

oooooo

300

340

r00 K

to0

460

K

5-24

I.6MEG

t.

Figure 5-12. Resislonce Measurements-Right Side

NOT

I.ALL

FROM

TO

2.@

E S:

READINGs

TERMINALS

GROUND.

_

INFINITY

cDcD

z

o

I.5

I.5

M

M

EG

EG

250

AN r6-30ARRr5-3

o-

'\9

,9

Section

l-j

I]
li

Lj

V

L

300

ja'

300

300

6OOK

l|oK

i0K

400K

-

\9/

l^

t­l2

lco

I

lor./

lro

120
l-^

)6

2.5M

500K

20

co

300

EG

3 MEG

z

300

)6

zv

zv

Figure 5-13, Resislonce

Measurements-Lefi

Side

5-25

Sectlon

V

NOTES:

I.ALL READINGS

FROM TERMINAL-C

TO

2.a = INFINITY

AN r6-30ARR|5-3

\

GROUND.

7

O

@cD

I.5

I.5M

50K

80K

MEG

EG

I

MEG

250

\n

\@YKY,g

K

roo

co

MEG

I.5

260K

300

300

(i

2 MEG
I.5 MEG

470K

5-26

460K

8800

rooK

360

460K

o

2200

roK

e3K

Figwe tI3A. AN/ARR-tsA

Resislonce fileasurements-left

2

o

20

300

@

20

zv

20

20

20

27

27

27

0

800

27

800

Side

Revised I February 1949

{

AN l6-30ARR|5-3

BBBrBInHoooB

Section

ci

l

V

o
o

F

ti

Ot

$

J

z

\

5

U

F

o

6

ooooooo

NNNNNNN

\

b

't<d

5r'

z

o

(,>

zl
Az

<;
uZ

E-

Jtl

CCC

cco

Revised I

February

1949

Figure 5-14. Resislonce

hleasurements-Bottom

r6-30ARRls-3

AN

Scction

V

v-

lz>el

v-t32

I ZJ\:

t0

VOLTAGE TO GROUND

t

(vol-rs)

Resistance

Tube

Pin

Number

1
2
.)

q

D

6

n

T

8

i

I

/
3

^

5

b

t

8

1000 Ohms

Per Volt

0
0

1.55

-.1

1.55

L27

13

183

0

27.5
.1
.25

­.1
.05

-

13

227

*Scale

A

fl,

D

D

c

ft

A

.tL

A
C
D

20,000

Ohms

Per Volt

0
0
I,7

-.6

7.7

LJa

13

183

0

26.5
.1

-,7
.1

_

.05

l-J

227

A
A
A
D

D

c

A
A
A
A

c

D

To

Ground

(Ohms)

0
0

230

1.? meg

230

45K

't

7,500

0
1

490

500

490

100 K

d

I

6,000

K

\/ t a7

Figure

I

2SG7

5. fube Sockef

5-I

1
2

A

:

D

o

n

I

8.

Test Instments-

1.
(a)

f000 ohms

TS-297/U
Weston 663 )

Sii-iiii"-lir

(b)

20,000

TS-352/U

Hickock

Volfoge

ohms

Navy
Simpson

0

13

L.25
0
L.25

70

27

L92

0

27

1.8
0

'1.8

1L2

13.5

Lt I

per

volt

Multimeter or

-.

alternates

i

per

volt

Multimeter

"OE"

I

alternates

260

l

133

I

ond Resistonce

0

c

A

13

1.35

C
A

0

n

D

c

D

r:

tL

A
D
C
D

or

*leasurements

'Meter

1.35

75

26.5

t92

0

27

2.L
0

2.L

117

13.5

I/D

scales are

(Poge

A
D

c

D

c1

A

A
D 50K
C7
D

as follows:

one of

three

0
8

250

1.6 meg
250
100 K

1

7,500

0

250

18

250

7.500

A: 2.5v

10 v

B-

50

C-

D:250

poges)

v
v

Revised

l5

October

1947

v

Section

V

r6-30ARR|5-3

AN

Tube

Pin

Number

1
2
3
4

5

6

I

8

1
,

3
4
5
6

q

I

8

1
,

3
4

b

6

q

I

8

1
,

3
4

c

6

rl

,

8

1
2
3
4

D

o

a

I

1000 Ohms

Per Volt

.05

­75

.25

-.1
50

.a

13.5
0

0
0

0

.09

­0

110

13.5

230

0

13.5
0

_

.25

0

72.5

27

113

0
0

0

-28
0

22

13.5

5.5

0
0

0

-.20
0

117

13.5

230

'Meter

l. T€st

scales

Instrtments-

(a)

l00O

TS-297/U

Y#f.htXtt

(b)

20,000 ohms

TS-352/U Multineter
Naw
Sltnason
Hickock

VOLTAGE

TO

(volrs)

*Scale

A
D
A
A
D

A

C

A

D

D

20,000

Per

c

A

D

c

D

C
B

A

D

D

are as follows: A: 2.5v

Per

Multlrneter

"OE"

260
t3ll

volt

arternates

]

per

volt

I

altermtes

l

J

ohms

B- 10

or

or

GROUND

Ohms

Volt

-1.3
L47

.b

.35

-

90

101

13.5
0

0
0
0

-2.6
0

115

13.5

230

0

13.5
0

-2.25
0

ID

27

115

0
0
0

-30.2
0

39

13.5

l.o

0
0
0

_

.45

0

130

13.5

230

v

Resistance

*Scale

A

Ground

(Ohms)

50K
D54OK
A
A 1OK
D 6OOK
A

c7

A160K

D Inf

L4

D Inf

c 13.5

A11OK

,0
D1OOK
C Inf
D15OK

c

c 230 K
c 13.5
B

A

D

D

50K

165K

Inf

L4

InI

C:

D:250

To

5K

5K

0

0

0

0

0

0

0

0
0
0

0

5K

0
0
0

0

50

v
v

s-28

Figura 5-1 5.

fubc

Socket

Voftoge ond

Resisfonce

Measurenrenls

(Poge

iwo of

Revised 15

three poges)

Odobq 1947

Figure 5-lS.

Revised

l5 October

fube

1947

Tube

Pin

Number

1
2
3
4

5

6

n

8

1

2

A

D

o

n

I

8

1

2

e

A

c

o

1

8

1

2

A

a

o
1

8

Socket

1000 Ohms

Per Volt

NC0

*Meter

1. Test

Yoltage

AN t6-30ARRI5-3

VOLTAGE TO GROUND

0

0
25
40
40

13.5

/a

2.0

2.0

33.5
0
0
4

r_3.5

0

0

13.5

2.4

0

2.4

oa

0

2.4

0

13.5

210
230

0

27
L0

0

L2.5

1.5

-.1

1.5

?0

27

187

as follows:

are

scales

Instruments-

(a)

(b)

f000

TS-297,/U
Wston
SlilPii'n-

20,000

TS-352/'U

Navy
SimDson
Hicliock

Resistonce

ond

ohms

ohms

"OE" 1

Per

663

leg

Multimeter

260
r$

(voLTS)

*Scale

D
D
D
A
C
D

c

C

c

c
c

C

A

A
D

A

c

D
D

C
B

c

A
A

-fr

D

c

D

volt

Multimeter or

I

altemates

i

volt

Per

or

alternates

l

J

/Ueosurements

20,000

Per Voit

Ltz
TT2
112

NC

13.5

125

23.5

23.5

47.5

32

13.5

13.5

70

13.5
205
220

27

10

12.5

-.7

85
27

187

A:

2.5v

B: 10 v

Ohms

0
0

.05

0

0

0

0

2.5
0

2.5

0

2.5

0

0

0

L.7

L.7

(Po,ge

.0

D

D Inf

D
A 27,000

c7

D6OOK

c
c
c

c 510,000

c

A

A
D

A

C
D
D

C
B

c

A
A
A
D

c

D

50 v

C:

D:250 v

three ol

three

Section

Resistance

To

Ground

(Ohms)

0

25 meg

Inf

1 meg

meg

I

9,500

0
1 meg

n

I

0

0
7

2,500

K

500

2,500

K

110

1

K

110

0

n

I

800
300

1,300

Inf

1

3,400

0

n

I

320

50K

320

K

100

1

7,500

poges/

V

5-29

Secfion V

AN t6-30ARRl5-3

v-r05

I 2SL7

Y-t07

I 2SL7

1- Test

Instruments-

(a)

1000

TS-297/II
Weston 663
simpson 44J

(b)

20,000

TS-35ZiU
NawY
Simpson
Hiciock

Tube

Pin

Number

1

2

3

4

5

b

I

d

1
2

e

t

a

D

o

I

8

per

ohms

Multineter

ohms

Multimeter

"OE'

260

133

volt

I

alternates

1'

per

volt

i

|

alternates

j

1000

per

0

60

-.35

-.35
0

13.5
0

0

65

0

110

1

26.5

13.5

or

or

VOLTAGE

Ohms

Volt

.tD

.75

TO

GROUND

*Scale

A

D

A
A
A

fI

C
A

A
D
A
A
D

-f\

C

C

Meter scales

A:

2.5 v
B:10
C-50 v
D:250 v

20,000

per

Ohms

Voit

*.25
95

1.3

n

-.

n

-.

0

13.5
0

0

95

1.35
0

r27

26.5

IJ.D

are as follows:

v

(VOLTS)

1

I

*Scale

A

D
A
A
A
A

c

A

A
D
A
A
D
A

c
c

Resistance

to

Ground

(Ohms)

30K
46K

4700

25K
25K

0
8
0

10K

460K

4700

470K

15K

2100

a

-L

8

5-30

Figvre

S'l

5A^ V-l05

and

V-l07

Tube

Socket Yoltage ond Resistonce Medsurements for

Revised l

AN/ARR-I 5A

February 1949

Section

I

V

AN l6-30ARRl5-3

o

J

@

I

o

)

€

o

F

o

G

FREOUENCY

o

rooo

o

:

r

o

800

o

F

;

500

I
f

F

ts

400

=

J

BELOW

TYPICAL

15ro505to15

RESONANCE

ESONANCE

TYPICAL

SENSITIVITY

KC

XC

SELECTIVITY CURVE

AAND

CURVE

INPUT VERSUS

FOR EACH

illl

iltl

iltl

ABOVE

ABOVE RESONANCE

RE:

IOO

BANO

MILLIWATT

OUTRJT

FREQUENCY

I

FREOUENCY

P5.

TYPICAL AUOIO

C

C.PS.

TYPICAL AUDIO

I

FREQUENCY REPONSE

FREQUENCY

IOOO

IOOO

REPONSE

CURVE MCW.VOICE

CW

CURVE

Revised

l February

1949

TYPICAL AUTOMATIC

Figwe 5-16.

MICROVOLTS INPUT

CONTROL PERFORMANCE

VOLUME

Typical Operofions

CURVE

Curvcs

5-30A

Section
Porogrophs

Vl

l o.-I.i.

t6-30ARRI5-3

AN

I. TECHNICAL SUMMARY.

TTIBE

o.

COMPLEMENT.

Symbol

Type

Designation

-v--101
v-102

v-103

v-104
v-105
v-106

v-107
v-108
v-109

v-110

v-201

v-301

v-401

v-402

in AN/ARR-ISA

in AN/ARR-154

to obtai:r satisfactory

order

precautions

Operate

rninus

Do

the tube

per

five

not exceed

any of

of the

the tubes

equipment.

I

I

Tube

12SG7
12SG7
12SG7
12SG7
12SL7
12SL?

**12SJ7

1246
12SG7

12H6
725J7
12SJ7
12SJ?
12SJ7

I

Detector

t*

12SL7

In
following

(1)

or

(2)
through
eration

b. FREQUENCY

receiving

capable
in the

1500 to
positions of
quency range

of

1500

range

c. FREQUENCY

18,500

kc

the Band

covered

Band

to 18,500

BANDS.-The

is covered

A
B

c

D
E

F

NUMBER

d.

pre-set frequency

Ten

6-O

OF

Function

@

Mixer
First i-f
Second

*Balancer

AVC

Audio Driver
Audio Output
Multiplier

Limiter

L-F

Oscillator

H-F

Oscillator

CFI

Oscillator
Amp1ifier

CFI

CAUTION

be observed:

must

filaments

of rated

cent

rated

RANGE.

signals on

Control,

by each band,

Frequency

fS rnc to

2.5 mc to 3.5
mc to

3.5

mc to 8.5 mc

5.5

8.5 mc to 12.5
rrc

12.5

PRE-SET

channels

plate

during

This equipment

­any

kc.

in six bands.

together

Range

Z.; nc

5.5 mc

to 185 mc

TREQUENCIES.

sEcTtoN

SUPPLEMENTARY

Amplifier

i-f Amplifier

Lfe the

tube

within

normal op-

frequency

frequency

is

are

plus

voltages;

current

The six

the

with

given

mc

mc

provided

is

with-

range

fre-

below:

_

for

vl

DATA

voice, cw or
point

or from

unlock the controls

receiver

the
setting of the controls

e. FREQUENCY
stability of the complete equipment is such as
maintain the resonant frequency of the
within
The stability
frequency
equipment,

in

cies
adjustrnent of the controls
subsequent reception on each

with

sible
within the allowed
which

the

ELECTRTCAL CTTARACTERTSTTCS OF

t.
OMMENDED

circuit has been

an aircraft type antenna

with

40 feet in

to

AUDIO

s.

ance of

h. POWER

mcw reception

the receiver unit.

on

any channel without changing

on

for

STABILffY.-The frequency

plus

or minus .03% ot

tolerance

changes accompanying operation of the

plus

frequency changes due to inaccura-

the channel selecting mechanism.

a resulting

tolerance of

channel

was originally

ANTENNAS.-The

designed

length.

OUIPUT

the

audio ou@ut

OUTPUT.-The

bility will be consistent.with

action. With a r-f

modulated, the distortion

30/o
The audio response

input of

will
minus three db relative
at 1000

cps.

POWER

SUPPLY.

'.

(1)

VOLTAGE.-This

26.5 volt d-c

(2)

CURRENT

from

REQUINEMENTS

to operate

AT SPECIFIED RATED

(o)

Maximum

starting

amperes.

(b)

Maximum required

operation

(c)

ception

is

is eight

Maximum

three

and one-half

requirements

and one-tenth

from

a remote

It is

panel

the

the

is

receiver.resonant

aud manually

other nine

a

overall

for the ten channels,

channel will be

channels.

given

includes

and

the frequency
adjusted.

antenna coupling

to operate satisfactorily

ranging from

IMPEDANCE.-The

is

channel

audio output

avc and uoise limiter

10 to 10,000 microvolts,

will

not

vary

to'the

100 miliiwatt output

equipment

power

current is about 15

current

amperes.

Revised I February

ohm.

300

be less than 15%.

more than

is designed

source.

YOLTAGE,

for Autotune

amperes.

during

control

possible

tune

receiver

frequency.

After

frequency

REC-

17

imped-

capa-

plus

actual re-

1949

to

the

to

all

the

pos-

to

feet

or

{

a-

1-,,'

j.

DYNAMOTOR.

(1)

MANUT'ACTURER.

Company,

perature

Owallo,

(2)

MANUFACTURER'S

(3)

RATTNG.

(a)

INPUT:

(b)

OUTFUT:

(4)

The

is

+40"C

Ic. AUDIO

(1)

MCW-VOICE.-Within

from

db

300

(2)

CW.-Down

cps to

cps reference
1200

to

300

cps.

l.

SENSITIVITY.-The

is such
milliwatts
sultant
phone
conditions

as to

audio
signal
(modulation

of

Michigan.

26.5

volts

220

maximum

permissible

(+104'F).

FREQUENCY

3500

cps.

30 db

the

noise

plus

attainment

at 1000

to

and

within

permit

output

plus

on vs modulation

a r-f input

A" G. Redmond

-

TYPE.-GH-I9.

d-c at

volts at

1.75

.1 amps.

ambient tem-

RESPONSE.

plus

or minus

at 1600 cps from

or

minus three

sensitivity

of

the

of at least

cps,

with the

noise

ratio

of six

off), under

to the

equipment,

AN l6-30ARRt5-3

modulated
not

at 18,500

mum

amps.

three

1200

db from

receiver

100

re­for,

db

(30%

FORMANCE.-The
such
at
watts (-10%
ul input

audio
relative
receiver
tions

at 1000

in

excess

The

limits

of five

overall selectivity

kc will fall

set forth

Attenuation

db Below

Resonance

6
20
40

60

m. AUTOMATIC

that

with

one millivolt

1000

cps,

the audio

+20%)

is

varied from 10

output

of input

power

to the

protected

is

output at

signals

cps for
microvolts.

of the

within

the

below:

Kilocycles

Maximum

VOLUME

avc

action for

output

and

when the

to 100,000

wili not

one milliyqlf

against

up to

two volts.

Porogrophs

phone

receiver

maximum

9.0

L2.5

22.5

30.0

CONTROL

phone

signal,

power

vary

will

more

blocking

Section

l.j.-1.m.

measurements)

measured

and

mini-

Oft

Resonance

Minimum

{.4

7.5

7.5

I.D

pER-

signals

modulated

be

modulated

microvolts,

than two

input.

under

500

30gyo

milli-

sig-

The

condi-

Vl

is

the

db

Revised

l5

Oaober

1947

6-l

Section

Vl

AN I6-3OARRI5.3

a

"a

'!o

.o

a

6

o

rcq

.,O

'O

i,

i,

tl

/

v"ro r

v- ro2

v-20 |

P-20

v-lo9

v-

ro3

,t4'

|

x* gu€!

l

62

Figvre 6-1 . Receiver-Top

I

r6-30ARRr5-3

AN

o

o..

Srcion

Vl

v- t07

--

f

_

v_t

09

Revised

I Februory

1949

Figure

6-lA.

R-IOSA/ARR-15

Receiver, lop

r25J7

v-l07

r2 A6

v-r

v-r

o8

t2SL7

05

r5-30ARRI5-3

AN

l2sG7

v-lol

|

2SG7

v-ro2

Section

Vl

l25L7

v-t o6

|

2SG7

ro3

v-

r2sJ7

v-201

P-201

J-lo5

s-to6

:-ili

r:ri,'

-402

i\,

1l

\-

v-40r

,,

l./

t.t-

401

Y-

:./

z-\.

12SJ7

,/

t2sJ7

.\

-'

B-r0l

I 2SG7

v-lo9

P-301

J-lo7

Revised

l5

October

1947

Figure

Receiver Parts

6-2.

Artapgement-Top

Secfion Vl

r2

A6

v-ro6

AN r6-30ARR|5€

r2sG7

v-tol

I

25G7

v-r02

|

2SG7

v-ro3

P-t04

J-il

5-ro6

!-l!l

s-lo9

r2sL7

v-t06

2

^-,o.

v-lll

402

-

40t

/.

,\

\/

\./

tasJ7

,. \

\/

t2sJ7

8-r0l

| 2SG7

v-r09

P-30r

J-rO7

6-4

F|gltte

6-2A.

R-IOSA/ARP.-I5

Receiver

Ports

Arrangement,

Top

Revised

I

Februory

t

1949

r6-30ARRI5-3

AN

Section Vl

c- 144

R-t40

r4l

R-

s- to5

R-t44

,:

L- to2

J-lto

.P'-

-$

0

-.1

{b

:tr

P-ro3

R- | 39A-

B-C

Revised

I FebruarY

1949

Figure

Recciver-Bgflom

&3.

5-4A'

AN t6-30ARRl5-3

L-r05TO

D-rnt

L-rz6

Section

Vl

c-r46

I

L-r03
L-ro4­L- t28

l

-J-to8

TO

C-167

Figure

Receiver Parts

6-4.

ooooo

ooooo

R-r39A

Arrangemenf-Boflom

5-5

.J

Section

Vl

AN l6-30ARRI5-3

c-r03

R-to2

c-r04

R-t03

x-tol

c-ilo

c-il6

R-ro6

c-r

38

R-r38

c-r36

R-ror

c-to2

c-t69

R-t04

R-ro7

R-ro8

R-137

J-to3

66

R-t35

Figure

ge

6-5. Receiyer-Right

J-t02

Side

\

AN t6-30ARRI5-3

Srctlon

Vl

R-ro3

c-104

R-ro2
c-to

v-tol
x-lol

R-r06

c-il6

o

c-il

c-il5

R-r05

v -ro2

to2

x-

c-t40

R-r t4

K-t 50

c-r37

v-r09

x-t

09

-?

s-lolA

ooooo

ooooo

s-ior..^@

s-roic 16r:

/ /-'----T--------

o#Fdooooo

\:,

ooooo

-

rol

to2

-

c-r69

7

\S/

.tsr'\

r--:l

I F---t

- tQ4

R-ro8
R-r07

R-t37

R-t

35

c-r36

R-r38

-r38

c

\

o- ?nl

J-lo7

u-.n'

x-301

P- 501

ro2

J-

Revised

October

l5

1947

Figure

6-6.

Receiver

Arrangemenf-Right

Ports

Side

6-7

Secrion

Vl

R-r30

R-t29

c- t33

J-r09

c- r30

R-il 7

c-t2?

R-r

09

c- t2l

c-il8

R-il 1

c-t34

R-r28

c-t29

x-ilo

c-r

26

R-il3

c-lr7

R-l12

c- 120

L-ro2

Af{ l6-30ARRl5-3

R-r53

x-r08

R-il9

x-r05

cR-rol

R-r 55

c-t27

x-r04

c-r23

R- il5

R-t3l

R-r33
R-t22

z-122

R-t27
R- r32

R-t24

R-r5l

R-r52
x-r07
R-il8
R- t54

20

R-r

c-l3l

c-t28

x-r06

R-il 6

c-124

x- r03

R-il O

c-125

&8

s-ro2

Figure

Receiver-leff Side

6-7.

TEST

PROD

{

\-

AN

t6-30ARR|5-3

Seciion

Vl

--r-

R-t34

R-

R-t22

c-

R-

x-ilo-

R-

R-t2l

R-il6

c-

c-t23

c-t

R-l

R-t53

R-152

R-t33

J-r09
P-t02

R-tze_<_.

c-129-_

c-133

c-

188

c-t3l

R-t25

R- lt7

c-t24

R-|3

R-to9

c-tal

L-to2--

127

il9

I

2g_

t55

t??

t'7

l2

l:l

R-t56

T-tol

x-t06

{e'

,oo

-.

Sti

n:q,l-

sto

ii

iffi-Fr-rs4

o;

!:

-

,

-

=;-tsr

-

-

-

z-t2l

-

R-132

R-l30

x-to7

R-l

t8

Ct

-

c-r8e
c- r34

c_t30

x-t05

c-186

R-lZ3

t.4

-

ffiR-,26

Fc-r32

^=;G-

-

l*rto-'

'C'

rb

ir

-\-__

)z-

-c-t20

rrg

z-t20

R-rrs

c_ |

lg

x-t

03

R-il

R-t3t

c-t

25

1

Revised

TEST

l February 1949

PROD

Figurc

6-7A.

R-lO5A/ARR-15

#;Il

Receiver

-Left

Side

c-t

85

6-8A

P-r02

J-r09

R-r 28

cR-lo

R-t

55

R-il7-

c-r35

29

R-r

c-t29

x-il

o

t-

t3l

c-

-

c-r28

c-r26

AN I6.3OARRI5-3

v-lo8

x-t08

T-tol

R-t34

z-t22

v-t

07

x- r07

R-r52

=--

c-130

R-il 8

R-r54

v-r 05

x-ro5

v-ro6R-150

x-r06

R_t26

­R-r23

c-r32

c-t27

r6

R-r

c-t24

v-r04

x-t04

L_IZJ

Section

Vl

c-t20

L-r02

Figure

Receiver Parts

6-8.

v-t03
x-r03

a-t) 4

ALIGNMENT

PROBE

Arrangement-Leff Side

6-9

Section

Vl

R-r34

l6-30ARR|5-3

AN

r27

R-

R*r52

P-ro2

J-ro9

c-r29

c-r 88

r36

c-

R- r25

c-r26

R-t29

I

I

v-t

08

x-to8

R-r5 |

v-r07

x-

t07

-v-l05
c-128

_c-t86
v-r06

x- to6

-­R-t26

c-r87

c-t?7

R-il6

c-124

-

v-

t04

x-t04

c-r23

R-il5

x-t05

R-t23

c-t32

6-10

R-IOSA/ARR-I5

Receiver Parts

Arrangement-teft

v-to3

X- l|.-\3

Side

Revised I

Februory 1949

I
I

:

,t

il

I
i

AN t6-30ARRl5-3

Section

Vl

tg

Figure

-302

c

6-9.

High

c-301

Freguency

c-303

c-305

Oscillotor, Top Enclosed

L-302

c-306 R-302

l&ri*

'*i

*S;;::;'

c-308

Revised

I February

1949

Figurc 6-10.

High fuequeney

Oscillator, Opcn

6-10A

t6-30ARR|5-3

AN

Secfion

Vl

Figure 6-ll.- Low

$i

*l

-!

R-202

Figure

C-204

6-12.

Frequency

Oscillator' ToP

R-203

Low Frequency

Enclosed

C-208

Oscillator, Open

C-247

6-l

I

Section

Vl

r6-30ARRl5-3

AN

Figure

6-13.

Dynamotor

Unit

6-12

Figure

6-14.

CFI

Unit,

Enclosed

R-40 4

c-409

R-403

R-407

c-403

402

c-

c-40

Section

r6-30ARRI5-3

AN

405

R-

c-407

L-402

R- 402

406

R-

s

c-406

c-404

Vl

v-402

v-401

402

x-

x-401

Figure

6-15. CFI

Unit, rMounting

Side

Y-401

c-401

x-403

R-40 |

c-408

c-4to

L-403

Figure

6-16.

CFI

Unit,

Wired

Side

&13

V

Section

Vl

t6-30ARR|5-3

AN

Figure 6-17. Filter Unit,

ej

'!-.*"-

e

Eollom

Enclosed

5-14

Figure 6-18.

Filter Unit,

Eoftom Open

E
t-

AN l6-30ARRI5-3

\1-\\

Secfion

Vl

Figure 6-19.

Relay

Unit, Side Enclosed

*r,,

-

P-301

Figure

6-2O.

c-501

Relay Unit, Side

K-502

Open

6-15