Hammarlund SP-600-J_SP-600-JX User guide

V,

-

9

•

,

,

V"'

•

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..

GENERAL PURPOSE

COMMUNICATIONS

MODEL

MODEL

INSTRUCTIONS

MODEL

The

Model SP-600-J Receiver does
Frequency Control Unit.
Book is used
Receiver, all indications in
and

diagrams, with referencetothe
Unit,

trol

With

in

connection

shouldbeignored as theydonot

this exception

SP-600-JX

AND

SP-600-J

SP-600-J

When

with

the

two models are identical.

this Instruction

the

Model SP-600-J

the

text, photographs

Frequency Con.

not

RECEIVER

have the

apply.

!

Manufactured

460

THE

West 34th

HAMMARLUND

St.

ISSUE

PrintedinU.S.A.

MFG.

New

6

by

York

CO.

1,

INC.

New York,

U.S.A.

FRONT

Sp-

VIEW

600-JX

F\G.

\

OF

RECEIVER

IN

CABIN

ET

TABLE

OF

CONTENTS

Title

Technical Summary

I General Description 5

II Circuit Description 6
III Installation
IV

Operation 8

V Maintenance

VI

Alignment

VII

ConversionofTable Model Receiver for Rack Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table

I-Tube

Table

2-Tube

Table

3-RF

Table

4-Approx.

Table

5-Parts

VIII

Supplements to cover Models SP,600,jL. SP,600,JLX and SP,600,j25

.................................•..........................................

Socket Voltages

Socket Terminal Resistances " .

and

HF

Oscillator Alignment Frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Signal InputsatIF and

List

AF

Stages...............................................

'.......................................

.. .. ..

'"

.

..

Page

4

7

10

16
20
14-

15
17
17

21

40

ILLUSTRATIONS

Figure 1 Front View of Receiver SP,600,JX. in cabinet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 2 Block Diagram 7
Figure 3
Figure 4
Figure
Figure
Figure

Figure 8

Figure 9 Bottom View of

Figure
Figure
Figure
Figure
Figure

LocationofTubes and Adjustments , " , . " .

Audio and Overall Fidelity Curves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Selectivity Curves

5

Rear ViewofReceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6

Top View of Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7

Top

ViewofReceiver-Capacitor Shield and Spare Fuse Cover Removed. . . . . . . . . . . . . . . . . .

10

Bottom ViewofReceiver SP,600,jX , " "

11

Bottom View of RF Tube Platform ,

12

Bottom ViewofFrequency Control Unit : , .

13

Circuit DiagramofReceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14

Connection Diagram--Receiver Chassis : . . .

Receiver-Tuning

Unit Shield Removed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

.. ..

. ....

.. ..

'"
. . .

..

..

. . .

18
18
19

..

25

..

27

29

..

30
31
33

..

35

Figure

Figure

15

Connection

16

Connection

Diagram-Tuning
Diagram-Frequency

Unit...............

Control Unit.

[ 3 ]

"........

37
39

GENERAL

PURPOSE COMMUNICATIONS

MODEL SP-600-JX

TECHNICAL SUMMARY

Electrical Characteristics

Frequency

·Band 4

Power
Output

Range-total
Band 1 .
Band 2 .
Band 3

Band 5 .
Band 6 .

Phone
600 ohm power load is adjusted to 500

•......•............•..................................................

.............................•.•••••••.................................

Output-2.0

Impedanee-600

jack'winding; delivers15milliwattstoan

6 bands ' '.' .

watts,

with

less

than10percentdistortion.

ohms'balanced split windings.

8000 ohm resistive load, when

ril.illiwatts.

RECEIVER

.54 to 54.0

.54

to

1.35to3.45

3.45 to 7.40

7.40

t~.14.8

14.80 to 29.7

29.70 to 54.0

the

audio output to the

1.35

me
mc
mc
mc
mc

me

mc

Power Supply Requirements

Line Rating

Power Consumption. . .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 watts,

Tube

Complement-total

RF,IFand
HF,

2nd
Crystal Controlled
Mixers 2

Detector,

AF

Amplifier andIFOutput
Power

Rectifier ' . . . . .

Voltage Regulator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

BFO Amplifiers 7 - 6BA6

Conversion

"C"

Bias Rectifier and Noise Limiter &

Output......................................................................

and

HF

Oscillator...

20

BFO Oscillators

'"

95, lOS, 117, 130,

'"

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...1 - 6f.C7

Meter

Rectifier. . . . . . . . . . . . . . . . . . . . . . . . ...3- 6AL5

190,210,234

;

and 260 volt taps, 50,60

1.25

amps.at117 volts-maximum.

, "

Mechanical Specifications

Rack

Model-

surface.

Table

Weight

Model-

Performance

Sensitivity is 2.3 microvolts,

at

10 db,

Image rejection ratios are better than

The

IF rejection ratio at 600 kcis2700 to

TheAVC
200,000 microvolts.

Dimensions; 19 inches wide, 10!/z il!ches high and 16!/z inches deep from rack mounting

66 lbs.

Dimensions;

Data-

20 milliwatts output and with

action will maintain

21%

inches wide,

(approximate values-taken

or

better, throughout

the

RF

74dbthroughout the frequency range.

the

1.

output constant within12db when the input is increased from 2 to

12~inches high and

on

a sample receiver)

the

entire frequency range, for a signal to noise ratio of

Gain Control at maximum.

17Y8

inches deep.

.,

3- 6C4

1-

1- 6V6GT

..

1- 5R4GY

..

1-

Weight

cycles.

~

6BE6

12AU7

87!/z lbs.

OA2

[ 4 )

GENERAL PURPOSE

COMMUNICATIONS

GENERAL DESCRIPTION

The

SP,600,]X is a 20 tube Radio Communications

with

Receiver
suffix in
is made using components having characteristics which
are

the

equivalentofmilitary component specifications

insofar

steel, table model cabinet finished in dark grey
complement
ing in a standard 19 inch relay rack.

operation from a single phase, 50
ing current
primary
range from 90

is 130 watts.

loudspeaker reception
telegraph,
diversity

oyer a frequency range from 0.54 to 54.0 megacycles
in
control knob,
frequency
a small front panel window indicates
band in use.
indicator

has
vernier dial provides continuous expanded scales over
each frequency band for extremely accurate logging

and

design to permit maximum traverse speed as well as
exceptional operating ease.
and
extremely close calibration accuracy
accurate resetability. A tuning lock provides positive
locking action

main dial is 50to1

to

as

The

receiver is supplied in either a well ventilated

The

self contained power supply is designed for

is

The

receiver is suitable for either headphone

The

standard model provides continuous coverage

six bands.

In

additiontothe

an

arbitrary scale whichinconjunction with

resetability.

The

single tuning control is large

vernier dials.

The

tuning ratio from

the

main dial is 6 to

self contained power supply.

the

model number denotes

is practicable.

the

lighter grey front panelorfor mount'

power

provided

AM

applications.

band

This

with

source.
with

to

270 volts.

MCW

The

large easily operated band change

on

the

and a band indicator visible

control also aligns

the

proper dial scale.

frequency scales,

An

anti,backlash gear train provides

without

and

The

taps covering a line voltage

The

of

AM

telegraph signals and for

front panel, selects

It

affecting

the

the

ratio from

1.

that

to

60 cycle alternat'

power transformer

power consumption

.

radio telephone,

the

the

dial frequency

the

andofspecial

controls

tuning control to

both

and

the

frequency setting.

the

The

this receiver

CW

the

desired

through

frequency

main dial

the

the main

completely

the

vernier dial

to

or

RECEIVER

I

amplifier,IFoutput,

J

stage are provided.

The

frequency control unit provides
channel crystal controlled operation on any six
quencies within
panel controls permit the selection
stability continuously variable tuning
six selected fixed frequency signals. For crystal
trolled fixed channel operationitis
set

the

dial to
crystal frequency desired
frequency control. These crystals are not supplied

with the receiver,
order from
the signal frequency for which each is to function.

The

ferenc~

type noise.
of

the

The
a balanced line.
95

ohms.

conventional single wire antenna.

The
load
winding for balanced load operation. Maximum power
output
circuit
signals attenuated approximately
ohm power output.

The

but

leaves

tion between transmission periods.

Radiation

ments for shipboard operation and for multi,receiver
installations.

Frequency drift after a

ranges between .001 percent and
que1,1cy

very unusual degree
tuned
stability.

HAMMARLUND

noise limiter circuit effectively limits the inter'

from ignition systemsorother

The

limiter.

antenna input circuitisdesigned for use with

The

audio output circuit is designed for a 600 ohm

or

line and is provided with a four terminal split

is

approximately 2.0 watts.

when

referred toan8000 ohm load provides

send receive switch

the

is

depending on

HF

oscillators and closely approaches crystal

AF

amplifier and

the

range from .75 to 54

of

the

or

only necessary to

the

signal frequency, switch to

and

tune with

but

may be purchased on special

MFG. CO. specifying

sourcesofpulse

limiter switch permits optional use

The

input

impedance is nominally

receiver may also be operated with a

The

15

db below

desensiti~es

power ontoprovide for instant recep'

negligible

and

complies with require'

15

minute warm. up period,

.01

percentoffre'

the

frequency used. Thisisa

of

frequency stability for variable

output

power

for

fixed

fre,

mc.

Front

normal high

eitherofthe

con'

the

the

delta

headphone

the

600

the

receiver

Two

stages
provided on all bands. Single conversion is used for
signal frequencies
employing a crystal controlled oscillator, for signal
frequencies above 7.4
tion, detector
meter rectifier, beat frequency oscillator and buffer

of

radio frequency amplification are

up

to 7.4meand

mc.

andAVC

Four stagesofIF amplifica'
rectifier, noise limiter and

double conversion,

[ 5 ]

The

selectivity control provides three degrees of
crystal and three degrees
ranging from sharp (.2 kc) to broad (13.0 kc).
crystal filter embodies the same circuit fzatures
have provedsoeffective

Pro

Super
mechanical design.

Receivers, incorporated in an improved

of

non'crystal selectivity

and

desirable in Hammarlund

The

that

II

CIRCUIT DESCRIPTION

General­Figure 13. A block diagram, Figure 2, is provided
more clearly
the

various circuit sections.
tubes is
conversion, used
consists
Y'2,

First

four

stagesofIF

Yl1,

Detector
Y'15,
AF

amplifier

Y,17

and

B

Power

Voltage Regulator Y,18.

In

the
frequencies above
Second
the

Gate

Input
to provide optimum coupling from a
mission line. A balanced doublet
antenna

RF
turret
coil assembliesoftheRFamplifierV,1
Y,5

and
rectly adjacent
gang

tuning
assures maximum sensitivityathigh
ratio.

First

The

rotary

sign

of

capacitor

vide frequency stability
to

a previously unattained degree.

First
V.3)-For
frequency operation, a crystal controlled high fre,
quency
variable
of

six crystal positions, is effected
control. A second
mentofthe
or

minus .005

intennediate

to

sion

7.4 mc.
incorporating

circuit. Six positionsofselectivity provide 6dbband,
widthsof.2, .5, 1.3, 3, 8, and13kc.
narrower

operation.

treme selectivity
adjacent interfering signals.

The

circuit is shown schematically

show

the

arrangement

The

shown

of

Beat Frequency Oscillator

circuit

Heterodyne

tube

Coupling-

maybeused.

Ampli1ier -

is employedtochange bands

First

Heterodyne

the

Heterodyne

oscillator is provided.

to

455 kc is employed

There

in Figure

for

two

stagesofRF

Mixer

Y'5,

amplification

and

AYC

Y,16,A

the

Power

Rectifier

Y'19,

for

double conversion, used

7.4 mc,

Y'7.

An

Heterodyne

to

their

capacitor

turret

band

four

gang,

and

rugged

services requiring extremely stable, fixed

crystal controlled oscillator

front

crystal oscillator frequency over a plus

percent

Frequency Ampli1ier - Single conver'

are

the

Hammarlund

bandwidth

The

crystal phasing control provides

for

3.

signal frequenciesupto

First

Heterodyne

rectifier

and

Y,16,B,

Supply

C Bias Rectifier

the

Oscillator

The

antenna

ingeniously designed rotary

Oscillator

respective sectionsofthe

and

their

Oscillator- (Yariable

change switch, advanced de'

twin

construction

and

dial calibration accuracy

Oscillator - (Crystal Controlled

Instant

panel control permits adjust,

range.

for

four

stages

positions,

the

high

and

locationofthe

The

circuit,

amplification

Y'7,

Y'9,

Y'14,

Y'13,IFoutput

Output

system which includes

Second Mixer
Y,8

are substituted

coupling is designed

or

andtoplace

and

respective tubes.

signaltonoise

section, variable

throughout,

changeover from

byafront

signal frequencies below

of

IF

patented

the

crystal filter is in

attenuationofclosely

functions

various

for

single

7.4 mc

Y,l

Oscillator

Noise Limiter

Power

95

straight wire

Y,4

with

amplification

crystal filter

On

Y,to

stage

Y,20

for

signal

Y,6

ohm

trans'

Y'2,

Mixer

stages di,

Y.4)-

tuning

a choice

panel

the

three

Y'4,

four

This

pro'

and

and
and

and

and

for

the

ex'

in
to
of

Double conversion is employed for signal frequen'

cies above

by

mc
Y,4orY,3
signal is
Mixer
Oscillator

Detector
high
circuit is provided
for
output
applications.

Beat Frequency Oscillator ­oscillator employs a
which gives a high
minimizes oscillator harmonics.
Oscillator

through
lator
injection by means
the
beat frequency, from

Noise

limits
other
s\Yitch S'6, permits optional useofthe
mode
present.

Audio

amplifier triode Y,16,B, amplifies
signal from

Audio

transformer coupled
to

deliver 2.0 wattsundistorted
load.
of

the
teletype
ing

provides attenuated audio signal
phone
of15milliwattsinto
the
wattstoa 600

IF

a 70

(455 kc)
chassis. A PL,259 plug
plied, are used

Power

partofthe
and
low pass

power transformerisprovided

primary taps, covering a power line source range
90 to 270 volts, 50to60 cycles.
former
in

the

7.4 mc.

the

First

then

Y,6

and

Y'8,

and

level Detector

CW

and

terminals provide for connections in diversity

Y'13,

Buffer Amplifier

lock,in

chassis. A

(}OO

ohm

the

and

Limiter-The

the

noise interference from ignition systems

sourcesofpulse

of

operation

Frequency Amplifier - A resistance coupled

the

Output-The

The

split balanced winding permits balancing

direct current in

or

similar service. A separate secondary wind,

operation.

ohm

Output-A

impedance source of intermediate frequency
to

Supply-

receiver.Itincludes

C rectifier V,20, together with their respective

filters

and

primary

The

Mixer

for

high image rejection.

heterodynedto455 kcbythe

the

for selectivity.

AVC-The

MCW

permits variationofthe

front

detector.

power secondaryisdelivering 500 milli,

ohm

socket, SO'239,onthe

for

and

filter components are protectedbyfuses

and

signalisheterodynedto3.955

Y,5

and

Heterodyne Oscillator

The

3.955 mc

3.5 mc Fixed Crystal Controlled

Y,14

tube

is usedasa

and

AYC

Rectifier.

with

separate time constants

operation. A

The

high

capacity Colpitts circuit

orderoffrequency stability

The

is coupled into

y,n,

of

a control locatedonthe
Panel control varies

zero beat

noise limiter .circuit

type

when

audio

through

the

This

winding will deliver an output

an 8000

resistive load.

cathode follower

and

this

connection.

The

power supplyisan integral

the

Voltage Regulator

plate supply circuits.

the

which

to

~lus

noise. A separate control

pulse type interference is

the

output

a split, balanced winding

outputtoa 600 ohm

output

circuit, as used for

ohm

resistive load when

RG,I1/V

the

with

The

The

YC

and

beat

frequency

beat frequency
detector circuit

eliminates oscil,

beat

oscillator

the

or

minus 3 kc.

limiteronany

audio frequency

tube

output

Y,16,A

rear skirtofthe

for head'

cable,

B rectifier

Y'18.

screw terminal

power

Second

Diode

rear

Y'15,

Y'17,

provides

not

trans'

AVC

and

of

audio

or

sup'

Y,19

The

of

,

...

~

is

[6

]

Tuning

operation to indicate

Meter-

The

tuning meter is used on A

the

accuracy of tuning and

relative strengthofreceived signals. Depression

the

Meter Switch converts

tion

of

output level in db from 6 milliwatts.

RF

Gain Control

control

is

provided for manual control of sensitivity
to prevent overloading on strong signals
erating with
"MANUAL"
when

the

Power

"ON

the

position.

switchisin

-OFF" switchisoperatedatthe

clockwise extremity

Vi
RF

6BA6

V2

RF

6BA6

the

meter circuit for indica-

and

Power Switch -

AVC-MANUAL

This

control also operates

the

"AVC"

of

the

RF

gain control.

CR\'STAL

~.

.......

..,

:J..$'

.'

....

r--

switch in

position.

3.5

CONTROLLED

va

FFO
6C4

~

V6

;;fI

MIXER

•' 6BE6

...--

TheRFgain

when

counter'

me

.

'.

.

..

,;

..

~

C'

••••

'!)/

.....

~~

I

~

~

VC

the

of

op­the

The

IFAMP

6BA6

V9

The

Send-Receive Switch-

the

sensitizes

receiver

but

send-receive switch de-

leaves

the

power

"on"
provide for instant reception between transmission
periods.

Convenience Outlet - A convenience power outlet

is provided

of

tion

an accessory suchasa lamporelectric clock.

rearofthe

chassis for

the

connec-

on

the

Radiation - Advanced design and shielding of
high frequency, second conversion crystal and beat
frequency oscillators has reduced radiation to a

so

that

negligible point

interference of this nature,
common in multi'receiver installations, is reduced to
a minimum.

~

V13
BFO
6C4

Vi0

IFAMP

6BA6

~

~

V12

BUFFER

6BA6

Vii

DRIVER

6BA6

~~

~+

V14B

AVC

6AL5

V14A

DET

6AL5

~

Vi6B
AFAMP
i2AU7

~

V17

OUTPUT

6V6GT

~-<

to

the

V3

FFO

6AC7

CRYSTAL

CONTROLLED

V20

C

RECT

6ALS

•

BLOCK

DIAGRAM'

FIG.

INSTALLATION

Tubes

and

Packing-

see

that

all tubes are firmly in their sockets and

any packing materialisremoved from

Power Supply - Make sure

at

lead

nectedtothe

the bottom of

tap

50 to 60 cycle power source voltage.

Antenna-The

socket,

UG-I03/U,isdesigned to match a
transmission line.
and connector plug,
ceiver, are for use with
be used with a balanced antenna installation.
desired to operate with a single wire antenna,
antenna lead-in wire should be connected to one

of

the

terminal

connector plug and a ground lead

should be connected from

After

unpacking

the

that

the

primary tap

the

power transformeriscon-

which most nearly agrees

input impedanceatthe

The

angle plug adapter,

UG-I02/U,

RG,22/U

supplied with

cable which should

the

other terminalofthe

the

receiver

that

receiver.

with

the

antenna

95

ohm

UG,104/U,

the

re-

If

it

the

~

IFOUT

i2AU7

IF

Vi6A

OUTPUT

---

••••••••••••

-----

Signal

LIMITER

Signal path

path

•

••

V15A
6AL5

common

for

Vi5B

METER

6AL5

TO

OUTPUT

LEVEL

10

all

frequencies

•

1+

METER

frequencies

above

below

7.4

7.4

me

me

2

III

connector plug to
adjacenttothe

ing unit.

Speaker -

The
magnet dynamic type and should include a
voice coil to 600 ohm line matching transformer for
connection

the

receiver. Caution:

not

used, connect a 600 ohm, 2 watt resistor

terminals

to

to
transient peak voltages. For applications requiring
insertion

is

voltages,
sections
the

of

the

of

the 600 ohm output may be removed and

insertion circuit, such as a low resistance balancing

potentiometer, connected in its place.

Headphones - Either high

the

ground terminal, which

antenna socketatthe

speaker should beofthe

rearofthe

permanent

tun-

.speaker

the

600 ohm audio output terminals of

When

the

600 ohm output is

to

these

avoid component damage from high

the

direct current control

jumper connecting

or

or

indicating

the

two balanced

low impedance head-

is

[7

]

P~()Il~'

jack..located

The·

..

table
in

protectiv~·

bottOm cover plates are supplied for mounting

Btahdaid

See

position which permits

Y6, are
supplied on special order for any signal frequency
in
ordertoinsure correct crystal controlled frequency
operation,
MARLUND
specify
be
loosen
quency Control Unit, T34, and

,spring assembly to

crystals in
retainer spring aSsembly forward

. press

thumb

.

each crystal wasseleeted,in.megacyCleS

. chart provide.d for

ma,y

be used by. plug connection to

at

the lower left side .of

high· impedance type is recommended.

Mounting-

Qr

a

well

Seetion:'

CI')"t8la for 'Frequency

the

rangeofthe

the

used. See noteatendofTable

the

on

screw.

The

receiver is. de$igned for either

rack mounting. Table models are supplied

ventilated, steel cabinet with handles and

rubber feet. Rack models, with

19

inch

rack..

The

VII.

. "..

panel is

The

receiVer shouldbeplaced 'in a

the

-.

free'access

10~

Control-

not

supplied with

receiver above .7S megacycle.

crystal units maybe.ordered from HAM,

MFG.

signal

knurled

the

top

of.

. . , .

CO.

frequency, for which each'unit is

thumbscrew

the

sockets, numbered r to<6. Bring

the

Mark

this·

the

receiver,

INC.

and the order .should

S.

dn'top

rear. Insert

80

crystal holders

the

signal

frequency for which

PurPose

alongside·the' crystal·

1'0

push

tha~··dre,~c6pririg.;

~d

the

the

front

t0l'

inches high.

of

air. '

~

. .

Crystals"

but

install crystals,

df

the

the

retainer

the

Crystal

tighten

QJ1

the plastic

phone

panel.

in.~

Y1

will

and

to

be

In

to

Fre'

or

the'

die

.swi.tch,

erasedifit

time.

that
poSitions, which

set~cfur

.

thekrid__reCeive

be

teimirliliofthe
S9 is left10the

..

, A.ve

1~4:

versity

;

ate

these tlttD1.inalsare·,

"

rearofth~c411sgis

.eeletypeor0th.er

kc,jn~ediate

~,d

'.

-an

..

.te8j8tiV~

"

lnict~~-

-

at

.

an.acc:el8Orr,

52. Pencil.
is

The

nUmerals

they agreewith.tb;e numerals

sWitch. . .

R~CoDnectiOns

made

by

'soldering a twin 'conductor cable to the

'

AVC~,~Output

J,qaand

~~

plpWded

""P~~>·

,providecf'Vritlia wire jumper connection when

1F00~t

ltG,ll/Ucableshould-be

~tput

C~nv.Ce

thertltr0(

(jf

.approXiniate1y

-lOad,

Signal.

or"

ink may

d~dtQ

on'

the chart Should

are

also

-

'functionisdesired,'connection may

Send·Receive switch, 59.

Sendoropen'position. ,

series

__

The

fre.quencyis required.

with a

butlet

t!techassis maybeused for operating

suCh

Ifextemal

connection to

.,.tthe

The

n()f~Ulled

I~

O~tput

provides!:iQr connection in diversity,

~pplicationswherea

norm~

-'

__

-The

as

an

electric clockorlamp.

..

·~.Used,

changewx.

an~

,bgures

be

()ntlie~staI

indi~tea

-

Shunt

rearofthe

Diode

.for external connection.

Used.

200

sensitivitY input

power outlet receptacle

by

'<

relay

the

o~tiOn

In

this

~lUlection

the

detector"diode

receiver for di,

Output

socket, SO,239, at the

ThiS will provide

millivolts to a 70'ohm

terminals

sourceof455

APL,2S9

. .

can be

at

any

used

socket

.crystal

.

case

to

plug

Of

so

for

the

2

.'

,OPERATION

Genftal...-·Before attemptii,lg operation
SP'6QO
familiame himself with
various controls.
this
the
front panel
example,
trol,
legend appearing adjacent to
to
ingthis,
are
are shown

is 'a 6,position switch which selects three
three
extremely sharp
fideUty mew
dial

.

control is a differential type, Variable air capacitor.
It
acteristic

channel
frequency.

receiver, the operator' should thoroughly

the

functions and usesofthe

When

descnption,

partofthe

when

the

word SELECTIVITY in capitals indicates

photograph~,

description. Front panel controts and dials

shown in Fig. 1 and rear controls and tertninals

Selectivity

non'

indicateli'the 6dbbandwidthateach.Setting.

Phasing'

permits adjustmentofthe

RF' Gain Control~The

the

name adjacent to

.oronthe

referring to

Figs. 1 and 6, is suggested while read,

ill

Fig.

COntrol

crystal degreesofselectivity, ranging from

for

pperation. .

Control-

for

highattenuationl>f

interference

referring to

words'in capital letters represent

rear skirtof,the chassis. For

t,he

the

6.
:-The'

ew reception to broad

SELECTlVITY

The

SELECTIVITY control

The

CRYSTAL

on

either side

..

RF

cry~

the

the

control

SELECTIVITY con'

control. Reference

selectiVity char'

closely adjacent .

'.

GAIN

of

the

controls in

on

the

th~,

control

crYstal

PHASING

of

control varies

for

good

th~

signal

.'

and

IV

the

overall gainofthe

in either positionofthe

tive

Power
combined with
counter,clockwiserotation

throws
cated on

:Auc:Jio
varies the input voltage
control

MAN

PhoneS

jack opet:ating with

to

isinthe
separate
former, which provides an attenuated signal for head,
phones.

.

A~

able at the four screw terminal board at the rear of the
chassis for

IIImst:cUlation. '

Noise Limiter...-

the noise peak limite.£m or·.outofthe
control is operative-independentlyofany position
any other control.

Switch-The

the

power switch to

the

RF

Gain

Control-The

is

also operative in either positionoftheAVC,

switch..' .

Jadt

-:Tne

receive any

~dard

circuit

~condary

See Section-

Output:-

connection to a' 600 ohm'

receiver:

the

RF

GAIN

to the audio amplifier. This

PHONES

the

sleeve grounded and is suitable

single circuit phone plug.

at

all

times'and is connected to a

winding of

III

The,

The

See

SectionIICircuit DesCription.

This

AVC,

power,

GAIN

of

the

control dial.

AUDIO

jn8~ation.,

A\,ibIO

, .

LIMITER

cOri'trolis opera' .

MAN

or

on'off switch is

control. Complete

the

RF

off position,asindi,

jack is a single circuit

the

audio output'trans'

OUTPUT

ioad~

control switches

GAIN

GAIN

circuit; This

switch.'

control

control

is

avajl,

See Section

.

It

of

[8J

,

f

~

~

I

AVC-Manual Switch -

AVC-MAN

the

to

holding
wide variation in
minimizes
received signal
when

switch applies automatic bIas potentials

controlled RF

the

audio

the

the

variationofoutput

and

tuning

through

output

prevents blasting

In

theAVC

and

IF amplifier tubes, thereby

position

relatively constant over a

strengthofreceived signals.

due to fadingofthe

and

overloading

signals

of

greatly different
strength while traversing a frequency band.
A

VC

position
indication
received signals.
on

AVC
tionally strong signals
meter is less effective
below maximum setting.
A

VC

potential is removed from

and

the

by

theRFGAIN

CW-Modulation Switch

in

the

CW

and

lator

theAVC

keying.

In

lator is inoperative and

for either voice modulated

the

RF

Meter

of

tuning resonance and relative strength

The

RF

operation,

when

or

when

gainofthe

receiver is manually controlled

circuit is operative for

GAIN

controlisoperative

necessarytocontrol excep-

to reduce noise,

the

RF

In

the

MAN

the

but

GAIN

position

controlled tubes

control.

-

The

CW-MOD

position energizes the beat frequency oscil-

connects an additional timing capacitor to

circuit to accommodate

the

MOD

position

the

conditions are established
or

theAVC

the

beat frequency oscil-

tone modulated signal

reception.

Beat Frequency Oscillator

trol varies

the

tuningofthe

oscillator over a range from

-

The

BEAT

455

kc beat frequency

zero beattoplusorminus

3 kilocycles.

BFO

Injection ­cathode self biasofthe
fier, thereby determining

The

BFa

IN]

control adjusts

beat frequency buffer ampli-

the

injection voltage to

detector tube.

This

In

the

control is

control

to slow

OSC

con-

the
the

the

the

of

RF
the

lock for
frequency setting
dental shifting

CHANGE
RF
assemblies, from one frequency band to
turret
tion desired. A positive detent mechanism assures

correct location
CHANGE
MEGACYCLES band indicating dial, located at

centerofthe

cator with

control selects either variable high frequency oscillator

operation
which similarly numbered crystal sockets are provided
in the Crystal Control Unit. See Section
tion.
small frequency tolerancetowhich
made.

pole, double
to
Tuning

control is used to adjust
meter when
RF position.Itis adjusted to produce a reading
plus 20 db on
microvolt
switch in

METER

circuit for indication

Send-Receive
pole, single
tion

it

desensitizes the RF amplifier, gate, second mixer

and

3.5

mc oscillator tubes during transmission periods.

.

Tuning

rotates

and

the

vernier tuning dials.
quency band scales, calibrated in megacycles, and
arbitrary outer scale.

ato 100 scale.

pointer
plete revolutions

dial at any setting. Thus, if

scale
the
this setting is read, 487.6.

vernier system divides
over each frequency band into approximately 600
vernier divisions,
points. Since
on
into approximately 6000 readable settings.
mits extreme accuracyinthe

of

the

of

of

the

vernier dial indicates 87.6,

the

vernier scale, this divides each frequency

stations.

Tuning

rightofthe

-

The

throw

Control

SEND-REC

toggle switch.

and

Dials -

control is a single

In

the

The

TUNING

SEND

main tuning capacitor as well as

The

main dial has six fre-

The

vernier dial has an arbitrary

The

numeral under

the

main dial indicates

that

have been madebythe

main dial indicates over

the

rotationofthe

with

one-half division calibration

the

the

numberofcom-

the

pointer for

the

the

readingtolog for

This

precise mechanical

upperorfixed

the

figure 4

main dial

itiseasy to estimate one-tenth divisions

This

Lock -

The

TUNING

logging

TUNING

cQntrol, provides a positive

and

LOCK, located to

posi-

control

the

main

vernier

outer

and

band

per-

resetting

an

db from 6 milliwatts.

the

pressed for
been adjusted for low power output, by means
headphonesorspeaker. Failuretoobserve this precau­tion may result in damage
AD]
when operating on

adjusted to obtain a
the
from
justedto6 milliwatts,or1.9 volts across a 600 ohm
resistive load.

Preliminary to Operation­"on"byturning
advance this control to
light. Place
the
in which it is desired to operate.
at

to permit

plug
See Installation, Section III.

MCW

its extreme counter-clockwise position and
SELECTIVITY

the

tuning mechanism without affecting

Band

and

whenitis

of

the tuning.

Change-Each

control turns

HF

Oscillator coil, trimmer and switch contact

desired to prevent acci-

revolution

the

of

the

turret, containing

the

next.

BAND

The

has no stops and may be turned in either direc-

of

the

control simultaneously operates

panel

the

proper scaleofthe

Crystal Controlled

or

anyone

The

DELTA

FREQ

Meter Switch -

throw

various bands.

and

aligns

the

HF

Oscillator-

of

the

six

crystal positions, for

control compensates for

The

METER

toggle switch with spring return

The

BAND

the

small

dial frequency indi-

main dial.

The

XT

ALS

III

Installa-

the

crystals are

switchisa double

theRFposition. See SectionIICircuit Description,

Meter.

Tuning

least15minutes before using

Meter Controls-

the

METER

the

RF scaleofthe

RF

input signal and

theAVC

switchtothe

of

RF

position

AF

when

the

AF

scale unless

controlisusedtoregulate

the

a db reading on the

meter and is made

the

BAND

in

the

600 ohm

the

CHANGE

the

PHONES

Reception -

AUDIO

theRFGAIN

SEND-REC switch on

tubes to warm up. Insert the headphones

switch to 3

The

METER

the

resistance shunting the

AD]

switch is in the normal,

meter, with a

with

the

AVC-MAN

position. Depression

AF

position converts the meter

the

AF

power output level in

This

switch is spring return to

of

released and should notbede-

the

audio

to

the

meter.

the

AF

scale. This control is

with

the

audio power

OUTPUT

Turn

the

output

The

meter current

AF

terminals ad-

power switch

has

METER

scale

output

control clockwise and

10.

Note

that

the

dial lamps

REC

and

turn

controltothe frequency band

This

should be done

the

receiver, in order

jackoruse speakerasdesired.

Turn

the

TUNING

kc.

Put

the

LOCK

turn

the

CW-MOD

the

the

the

the

RF

or
of

10

the

of

of

to

[9]

switchonMOD,
AVC-MAN
controlatits center position
switchtoVFO.

in

the

proper

as indicatedbythe
AUDIO
the

quency on

mum responseorindication

resonance

quarterofone

just

level and as requiredtoprevent

fully tighten
wise,ifdesired.
turnedtothe

frequency responseifthe
ciently high.Ifthe
TIVITY
which provides
LIMITER
SELECTIVITY
positions,
justedtoeither sideofits center positiontoattenuate
an
may be
stand-by periods in

the
The

GAIN
AVC-MAN
very weak signals
throwntoCW
Locate and
then

fixed frequency operation at
which crystals have been provided. See Section III,

Installation.

correspondingtothatonthe

GAIN

TUNING

the

the

the

AUDIO

switch should be

theXTAL

adjacent interfering signal.

turned

tuning range,orduring deep fadesofthe

RF

Meter

control operation

throw

The

Crystal Frequency

the

LIMITER

switchonAVC,

With

the

position for

control until some noise is heard.

control

main dial

main dial reading should be within one-

percentofthe

GAIN

the

TUNING

The

8 kc

or13kc position for improved

the

switch should

switch is used on eitheroftheXTAL

down

scale calibration is for maximum

switch isonAVC.

and

tune

the

the

CW-MOD

Tum

the

MEGACYCLES

to

and

control for

SELECTIVITY

signaltonoise ratio is suffi-

noise level is high,

most intelligible reception

PHASING

somewhattoreduce noise, during

the

transmission,

and

the

CW-MOD

the

BEAT

signaltoobtain .

theXTALS

switchtoOFF,

the

XTAL

and

BAND

indicate

be

switch backtoMOD.

Control

CHANGE

frequency

tune

the

on

the

signal frequency. Read-

overloading. Care-

LOCKbyturning clock-

turnedtothe

thrown

control maybead-

The

indicates only

When

OSC

any

signal frequency for

switchtothe

panel chart for

PHASING

tum

the

XT

band

desired,

dial, advance

the

desired fre­signal for
RF

Meter.

the

desired

switch may be

the

SELEC-

bandwidth

and

"on."

RF

GAIN

when

traversing

when

searching for
switch may
control set

~ero

beat and

maybeused for

numeral

the

the

ALS

control

the

Tum

maxi~

At

output

high

the

If

the

control

signal.

RF

the

be

at

de-

sired signal frequency. Set
signal frequency and adjust
obtain
and
MOD
trol for maximum RF
mum response.

CW
above. Place
the
for
either direction,toobtain
AVC-MAN
gives
levelbythe
andbythe
RF
SELECTIVITY
positions, as found desirable,toreduce noise
provide rejectionofan
PHASING
ence from an adjacent, interfering signal.Ifinterfer­enceofthis kind persists,
tween

. realuedbyslightly detuning

opposite sideofresonance from
undesired signal is located and readjusting
PHASING

the desired signal.
may be used as described
above.

O.

short time intervals,
and
be

keeps

the
of

~ro

beat with

the

BEAT

switchtoMOD

CW

Reception -

reception is

the

BEAT

~ero

OSC

beat.

switch may be used in

the

best reception.

AUDIO

RF

Meter

does

control is adjusted for minimum interfer-

the

desired and

control

If

reception istobe

for such operation

throwntoSEND

the

receiver warm and ready for instant use.

When

operationofthe

power "off"byextreme counter-clockwise rotation

the

RF

GAIN

the

main

the

DELTA

the

CW-MOD

OSC

control

The

the

CW-MOD

control

Adjust

GAIN

GAIN

not

operate on

switch may be used in

and

The

the

between reception periods.

control.

atO.Throw
and adjust
Meter

preliminary procedure for

same as for

at0,tune

the

the

Adjust

control

interfering signal.

the

the

Crystal Frequency Control

suspended
power should be left

the

receiver is completed,

the

indicationorfor maxi-

switchonCW

BEAT

audio pitch desired.

the

the

control

whenonMAN.

the

MAN

further

undesired signals may be

SEND-REC

discrimination be-

the

desired signaltothe

that

BEAT

under

tuning

the

MCW

dialtothe

C control

switch on

the

TUNING

MCW

OSC

OSC

and

reception

and

desired signal

control, in

position which

desired output

when

on A

position.

the

TheXTAL

on which

theXTAL

control for

Reception

resumed

switch should

to

CW
CW­Con-

with

The

VC
The
The

XTAL

or

to

the

"on"

This

turn

at

General-

duty

and

yond

the

of

the
prevent a· heavy accumulation
cause calibration
gears.
brush,
different portionsofthe
be

usedonthe

the

receiver will be greatly facilitatedifthe

of

this instruction book are thoroughly digested.

Some sectionaluingoffaults is possible,ifthe

is

not
operationofthe
normal operationonthe

indicates

This

receiver is designed for continuous

should normally require little attention be-

replacementoftubes.

gear

teethinthe

error

and

This

may be done

turning

existant on allofthe

that

the

controlstoobtain accesstothe

gears.

gears.

Operation

three

the

fault is associated

An

occasional cleaning

gear train is recommended

of

dust which may

improper operationofthe

with

a small stiff bristle

No

greaseoroil should

and

maintenance

frequency bands. Non­lower frequency bands,
three

higher

frequency bands,

with

V

MAINTENANCE

of

tube V7.Ifonly

are affected,

contents

the

to

of

fault
with

circuits

ofV6or
to
section.

Visual evidenceoftrouble is usually a
darkened resistor, whichiffound is likely caused
excessive current duetoa
tube
a case,
should be replaced as indicated. RefertoFigures 10
to
ponents.
inspection failtodisclose
voltages and resistances should be measured and
checked against
Any

[ 10]

V8.Ifonly

HF

Oscillator

elementatthe

both

16 and

appreciable departure beyond a normal variation

Table

If

the

three

higher frequency bands

the

fault is associated

one

single

and

RF

Coil Assemblies

short

load sideofthe

the

capacitorortube
5 for location and valuesofcom-

the

checks

the

on

the

values given in

with

band

is affected, refer

circuited capacitor

resistor.Insuch

and

the

tubes, fuses

fault,

the

tube socket

Table~

the

burned

and

1 and 2.

circuits
in

this

or

by

or

resistor

visual

of

approximately15percent from

tables will generally indicate

at

fault.

If

the

foregoing does not reveal

by

then a stage
made

as

shown in Table4.Any

the

values of
stageatfault.Ifa tuned circuit component, suchasan
IF transformer,
found defective and replaced only
need be realigned. Follow
Section

Oscillator
assemblies are each mounted on
dently
semblies are easily removed for inspection of these
units, without disturbing
replacing these shields, make sure

springs are in place on
before the shield

are
faulty performance
ceiver.
and check them in a tube tester of reliable design.
tube tester
for each tube type and position should be tried. See
Figures 2 and
tube
detected
formancebythe

when
line fuse,
from
or
the
ceptacle on
light
or

blown, replace it with a spare fuse.Inreplacing fuses,
make sure
line fuse holder
inserted in
fuse
operation,

cabinet
trouble.

by

four screws through the slotted holesateach side of

the

with bottom

removed for purposes of inspection and repair.

variable coupledIFTransformers,

whether

tivity switch S5,oronly on one positionofthis switch.

If

position, check for continuity of

associated

soldered connections

and check

tion localizedatone transformer exists on all positions

VI,

TheIFTransformers, Crystal Filter, Beat Frequency

of

Vacuum Tubes -

the

most common cause of decrease in sensitivity,

In

at

a time in order

Locating Faults -

the

the

plug may be checked by plugging a lamp first in

power source receptacle and then in

but

speaker, check for a blown minus B fuse,F2and

be

two screws through

front panel.

IF

Transformers

the

faulty operation occurs on only one switch

stage check of amplification should be

input

shown in

RForHF

the

for the unit involved.

and

the

3.5

me Crystal Controlled Oscillator

their

respective shields.

the

the

inductance adjuster screws

is

installed.

Weakordefective vacuum tubes

or

failureofoperation in a re-

caseofsuch faults, first remove the tubes
is

not

available, substitution of a new tube

3.

Such substitutionisbest made, one

that

by

the

improvementorrestorationofper-

new tube.

If

the

power switchisturned on, check for a blown

FI

and

replace itatthe

spare fuses.

the

thereisno soundatall in

that

the

blown,

the

or

rack and inspected for visual signs

The

table model receiver is held in

and

the

fault exists on all positionsofthe

with

the

switch contact involved.Iffaulty opera-

An

open circuit in

rearofthe receiver.Ifthe

only a

1.6A

and

that

minus B fuse holder. Should neither

nor

replacement of

receiver should be removed from its

the

The

rack model receiverisprovided

top cover plates which should be

-If

a faultistraced to one of

that

position, check for imperfect

at

the

the

values in these

the

componentorcircuit

the

fault,

great difference from

the

table will indicate

oscillator coil assembly,

the

replaced unit

alignment procedure in

the

chassis indepen-

The

shield can

soldered connections.

that

the grounding

the

as-

If

the

faulty tube may be

dial lamps do not light

rear of the receiver

the

line cord

the

ac re-

dial lamps

the

headphones

Fusetronisinserted in
only a

cabinet bottom andbythe

0/8

ampere fuse is

the

fuses restore

T4

or

the

coupling coil

coil and switch terminals

the

T5,

the

cabinet

the

check

selec-

In

is

if

of

of

the

selectivity switch, make

the

plate coils, on the main grid coil and on the wiring
associated with these coils. Transformers
and Crystal Filter T3 have additional inner shield

that

assemblies

the

adjusting screws.

on
the

adjusting screws with a screw driver to prevent
turning
ment and loosen the tension nuts, using another small
screw driver engaging one of the slots.
ing these shields and tension nuts, employ
method and tighten

prevent

frequency oscillator
with
be necessary to set
its number 3 position and loosen
in the rigid shaft coupling and the two set screws in
the
shaft forward through
necessary to remove burrs, caused
from the switch shaft in order to slide the shaft
through
the

a

coupling forward on
panel. Remove the BFO shaft bearing bracket by

taking
Unsolder the leads from
unit
not overheat the wireofthe
wire

aged

to its shield, there will be no beat frequency voltage
input to the buffer tube V12 even though
oscillator is functioning properly. Therefore, with the

shielded lead disconnected from the lug of

unit, check with a continuity

tion of this wire to

from

BFO

14.
shield can to the chassis and
undersideofthe
When
Before tightening the two screws holding
to
bearing bracket, adjust
obtain alignment of
Make sure
with
tension nut, before replacing

switch on AVC, and the SELECTIVITY control on
the
maximum tuning meter reading. Set
switch to
adjust
Turn
check
audio frequency source such as a good audio oscillator.

If

is
the

the

the

Beat Frequency Oscillator -

the

disconthe

flexible coupling on

out

at

the underside of

is

insulated with polystyrene

by

the
unit

Now

replacing the unit, follow

the

chassis and

the

Adjustment of

.2

kc position, tune in an unmodulated signal for

the

the

the

the beat frequencies obtained at each 3
not within the range between 3 and

set screws of

are held in place by

screws and losing

the

adjusting screws from working loose.

T6,ifthe

Crystal Frequency Control

the

selector switch shaft. Slide

the

the

disc.

Now

the

the

two screws holdingitto

heat.

Note

thatifthis cable wireisgrounded

the

buffer tube V12 and its freedom

chassis. Carefully observe the wiring of the

for correct replacement. See

remove

that

bowofthe spring downward against the

CW

top screwofthe

BEAT

output beat frequency against a known

the

chassis and remove the BFO unit.

the

the

the shield grounding spring is in place,

BFO-With

and with

OSC

the

BFO shaft coupling and turn the

the

continuity check on

the

To

remove these shields, hold

the

alignment adjust-

tension nuts just enough to

To

remove

receiver is equipped

Unit

crystal selector switch S2, on

the

four set screws

coupling and disc.Itmay be

by

loosen

the

four set screws of

the

BFO shafts and slide the

BFO drive shaft in the front

the

six terminals of the BFO

the

chassis, being careful

shielded cable since this

and

or

ohmeter the connec-

two screws holding

the

two screwsatthe

the

reverse procedure.

two screws holding
the

unit and shaft bracket

two shaftsatthe coupling.

the

shield can assembly.

the

the

BEAT

BFO unit for zero beat.

dial to each 3kcposition and

OSC dialat0,

T4

and T5

tension nuts

When

the set screws,

is easily dam-

the

replac-

the

the

T34, it will

the

switch

the chassis.

the

the

T6

on Figure

the

the

the

AVC-MAN

CW-MOD

k.C

position

3.5

kc,

loosen

same

beat

beat

BFO

BFO

unit

shaft

to

to

[11]

shaftofthe
repeat the above, resetting

screw

realized.

is
enough to allow
shaft until
screws.

Crystal Switch Adjustment-

drive

of

it

should be adjusted as follows: Carefully slide
switch shaft
coupling
tighten
the

knob indicator
originally set
set

the
holding
that

the
pin, lightly fasten
this disc is properly adjusted on
switch
between
should exhibit a slight amount
with

the

tighten

Crystal Control

that

the
necessary to remove
Refer to Figures

capacitor C60 from switch 83onthe
solder
leads
E13 underneath
of

the

XT

AL8
quency Oscillator. Loosen set screws
delta C control knob. Remove
at

the
transformer
chokes.
engages a grooveina mounting post
control unit. Remove
filter assembly panel to
corner
ciently to permit removalofthe
the

crystal control

screws are removed,

receiver.

handling it,

C shaft,

move
the

cover
enough
Hold
damaging
cover off
replaced, follow
Follow
menttoproperly reinstall

HF
operation occurs
receiver,
four coil assemblies for

BFO

with

respect to

the

of

the

BFO unit each time until

One

set screw shouldbeused just tightly

the

drive shaft to operate

the

range is correct

the

crystal control switch has been disturbed,

through

and

being careful

the

four set screwsinthe

under

crystal switchonthe

the

discina counter'clockwise direction, so

endofthe

in

the

number 1 position,

the

two discs should

thumb

the

set screws.

Crystal Control

the

black, black'white, blue'red and red'white

of

the

crystal control

unit

from filter capacitor C161. Remove

switch shaft, as described

topofthe

and

The

front

of

this panel

In

removing

be

careful to avoid

or

the

delta C capacitor may be damaged. Re,

the

four screws holding eachofthree sides
and

spring

to

make

these flanges aparttoprevent

therfchokesinthe

the

crystal

the

procedure

Oscillator

the

trouble should be found in oneofthe

the

on

the

Beat Frequency Oscillator.

slotinthe

the

set screwsofthe

and forefinger.

Unit

-

If

Unit

the

unit

15

and16and

the

chassis

bracket post adjacent to the power

remove

the

the

and

in

the

endofthis bracket is slotted

the

four screws

the

and

move

unittothe

the

unit

the

the

two top endsofthe

flanges clear

unit

box.

reverseofthe

under

the

RF

Coil Assemblies

only one frequency

that

the

drive shaft and

0 adjustment by

the

above range

and

then

tighten

If

the

disc

and

into

nottoturn

rigid coupling,

number
number 1 position
disc is against

not

it

is defective,itwill

for

repairorreplacement.

unit

and

unsolder

the
bracket over

mounting postsateach

the

chassis.

may be taken from

unit

any

unit

When

Crystal Switch Adjust-

switch mechanism.

bandinthe

3 position as

disc.

the

shaft,

the

connecting

be under tension

of

play

When

has been determined

unsolder

from terminal strip

nut

filter assembly suffi,

four screws holding

andinsubsequently

the

so adjusted,

gear plate.

the

under

and

and

of.

that

When

strain on

topofthe

their

while sliding

the

unit

above procedure.

bandofthe

the

top

the

BFO

both

mechanical

the

the

rigid

the

switch,

with

Now

and

the

drive

When

with

the

bar

and

when

tried

the

lead

Un'

red lead

the

Beat Fre-

remove

lockwasher

the

edges from

-If

tuning

the

crystal

secure

the

is to be

the

filter

and

the

these

the

delta

cover

box.

the

faulty

unit

be

of

of

turret. For example: Coil assemblies T13, 19,25and
31

should be examined if band 7.4 to 14.8 mc only,

To

does not perform normally.

the

assemblies stand

and

remove

Turn

unit.

question in its normal operating position and then turn
the

band change control two and
counter,clockwise. This will place
semblies parallel
Now

the

in
towards you and off the tongues of
best

to
inspect
sembly if available. Caution: Make sure

is

base

before going to the next assembly
change control. Failure to do this may
switch spring contacts beyond repair. Repeat this pro'
cedure until the faulty assembly is found.
these assemblies, first check for continuity
particularly
assemblies, where
receiver is operated in
transmitter signals.
be careful
coil is toward

Mixer Plate Coil Assembly - Trouble in the Mixer
Plate Coil Assembly
quiredatpin 7ofV5 is found to be greatly different
than
pin 7
ponents
sary to remove
assembly
cover plate and shieldofTl
replacement
assembly is to be replaced,
solder all
terminal boards
components

RF
form normally on
the

previous tests indicate

and audio frequency amplifiers is normal, including the

gain check in accordance with Table
pin 7
Platformorin
moving

move the top shield cover and inspect
capacitor connections. Refer to Figures 8 and
Observe
erly when
ture

tube adapter, see Section
modulated
andV2and to pin 7ofV5. For eachofthese positions
of

the
setting
orderof5or6 should be indicated for each stage and

loss

of
gated for the fault.
signal is applied to pin 7
in

the

the

the

remove the two springs holding one coil assembly

turret

remove only one coil assembly at a time and
it

for defectsorsubstitute a replacement as'

firmly seated

the

that

the values shown in Table4,and

of

V6

is normal.

of

the

as

described under Crystal Control Unit.

of

of

the

and

Tube

Platform

of

V5,

the

the

RF

that

the

rf

adapter and signal, tune through the proper dial

for

the signal frequency used. Gain of

signal will indicate

HF

oscillator section of

receiver on its rightorleft side

bottom cover plate from

band change control to place

and

at the bottomofthe

and

carefully remove it

and

securedbyits retaining springs

small primary coils as in

they

are liable to damage if the

the

In

replacing these coil assemblies

the

endofthe

the

frontofthe receiver.

Tl,

is indicated if the input re,

To

mixer plate coil assembliesitis neces'

the

crystal control unit and the filter

a defective component.

it

leadsatboth

of

the

unit. Refer to Figure15for

wiring of

Tl.

-If

anyofthe six frequency bands and

that

fault is indicated to be in the RF

the

main tuning capacitor. Before

Tube

Platform, it is advisable to re'

the tuning capacitor is operating proP'
tuning controlisrotated. Using a minia'

test signal successively to pin 1ofVI

No

signal output,

of

remove these coil

the

tuning

the

band in

one'

half revolutions

the

band coil as'

tuning unit.

by

sliding

the

shields.Itis

that

the coil

Or

turning the band

damage

In
of

theRFInput

presenceofvery strong

assembly nearest the

the

obtain access to

may then be removed for

If

will be necessary to

the

bottom and top

the

receiver fails to

performanceofthe

4 for the input to

the

main tuning

VI

alignment, apply a

the

section to be investi,

when

V5, will indicate trouHe

the

unit.

the

checking
the coils,

gain from

the

com'

The

the

entire

un'

per'

Tube

the

input

With

re'

15.

the

the

it

IF

[

12]

covers removed from
refer to Figure15and unsolder
red'white, red'green, yellow,black and blue'red leads
that

come from
Unsolder
stators and ground straps
the
Change control one,half
in order
and leave
tube platform is replaced, otherwise irreparable dam'
age to
screws
four screwsatthe
platform.Inhandling be careful to prevent damage to
the
ready

procedure.

the

leads from

lead from

the

switch contactsofthis assembly.

to

the

to

have

the

band switch in this position until

switch contacts will occur. Remove

at

the

cornersofthe

be replaced, follow

the

tuning capacitor-and

the

blue, white'black,

the

tube platformatthe

the

tuning capacitor rotors,

at

each section. Unsolder

tube platformat83.

turn

from any band position

the

band switch contacts disengaged

top of

the

side flange and carefully remove

the

reverseofthe

top of

Turn

the Band

platform and

When

the unit is

the

the

TI,

Tl.

RF

four

the
the

above

Main

Tuning

place

the

follows: Remove the top cover and unsolder

the

capacitorasdescribed underRFtube Platform.

of

Bring

the

capacitor to full meshbymeans of
control. Carefully remove
at

the front of

that

secures the capacitor frame front plate to
gear plate, looping a piece of small wire around
spacing washer between
The

front capacitor plate is located and held in posi'
tionbytwo dowel pins and will not move when the
front screw is taken out.
its frame with one
ing screw and spacer.
moved to
lifted from
in reverse when replacing the capacitor.

Capacitor-

main tuning ca.pacitor,

the

capacitor. Remove

hand

the

rear,todisengage

the

receiver. Follow

If

the

the

capacitor and gear plate.

Now
and remove the rear support'
The

capacitor may now be

itisnecessary to

the

procedure is as

the

spring and drive link

the

single screw

hold the capacitor

the

dowel pins, and

the

above procedure

the

re'

leads

tuning

the
the

by

..

[

13

J

TUBE

SOCKET

VOLTAGES-TABLE 1

Voltage to chassis. Measurements made with Weston Model

asterisk were made with Measurements Corp. Model62VTVM.

above 10 volts and the 10 volt

at

control

TUBE

V-I
V·I
V-2

V-2
V-3
V-3

V;3
V-3
V-4
V-5
V-6
V-6
V-6
V-6
V·7

V-7
V·7
V-7

V-8

V-8
V-9
V-9
V-10

V·10
V·U
V-U
V·l2
V-12
V-13
V·14
V-15
V-16
V·16
V·17

V-17
V·IS

V-19

V·19

V·20
V-20

minimum and

I 2 3 4

*-1

*-41

*-1

*-41

-

-

-

- -

BO

-

-

-

-

- -

*-1

·-54
*-1
*-54

0

30

*-1

*-54

*-1

*-54
*-7.8
*-7.8

- -

- -

H

-

-

50

57

-

-

150

-

-

-

-

CW-MOD

-

-

-

-

-

-

-

-

1.2 *6.3ae

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

300

320
*-96
*-97

scale for voltages below10volts. Line voltage 117, no signal input. Audio Gain

*6.3ac
*6.3ac
*6.3ac
*6.3ac

-

- -

-

-

*6.3ae

*6.3ac
*6.3ae
*6.3ac

*6.3ac
*6.3ac
*6.3ac
*6.3ac

*6.3ae

*6.3ae

*6.3ac

*6.3ac
*6.3ac
*6.3ac
*6.3ac
*6.3ae
*6.3ac
*6.3ac
*6.3ac
*6.3ac
*6.3ac
*6.3ac

1.5

1.6
260
280

-

-

-

*6.3ac

*6.3ac

switch on "cw"

SOCKET

5

200

-

260

-

210

-

260

-

-

-

-

-

-

-

-

130

-

140 110

-

225

-

260

-

225

-

260

-

215 125

-

265

-

215

-

265 0

-

-

-

-

-

-

0

30
205 90
260
205
260
210 140
235
210
240

25

*22

-

-

-

-

- -

150

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

228
265

AVe

PIN

6

95

-

245

-

95

-

245

*6.3ae

0

*6.3ae

150

*6.3ae

0

*6.3ae

150

-

-

-

*-1

-

*-55

-

*-1

80
75

*-55

304

245 .4

0 0

-

- -

-

-

-

150

90

-

150

140

40
45

-

- -

-

-

-

210

240

*6.3ac

-

*6.3ac

-

-

-

-

-

tap normal.

NUMBERS

7

0

-

-

- -

-

-

-

-

-

-

-

-

-

*-96
*-97

663

The

8

-

-

-

- -

265
265
290

290

-

-

-

-

-

-

-

-

-

-

- -

-

-

-

-

-

-

-

-

-

604

7.4
12

13

-

300

320

-

-

Volt-Ohmmeter, except those indicated

500 volt scale was used for all voltages

9

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

--

-

-

-

-

-

- RF Gain

--

-

MODE

RF Gain max.
RF Gain min.
RF Gain max.

RF Gain min.
RF Gain
RF Gain
RF Gain
RF Gain
RF

Gain max.ormin.
RF Gain max. or min.
RF Gain
RF Gain
RF Gain
RF Gain
RF

Gain

RF Gain
RF Gain
RF

Gain
Frequencies below 7Ame
Frequencies above 7Ame

RF Gain max.
RFGain
RFGain
RF Gain min.
RF Gain max.
RF Gain min.

RF Gain
RF Gain max.ormin.

- RF Gain max.

- RF Gain max.

*6.3ac
*6.3ae

-

-

-

-

-

-

-

RFGain

RFGain
RF Gain max.
RFGain
RF Gain max.ormin.

RF Gain
RF Gain

RF Gain max.
RFGain

OF

OPERATION

max.-VFO
max.-Crystal
min.-VFO
min.--erystal

max.-Freqs.

min.-Freqs.
max.-Freqs.
min.-Freqs.
max.-Freqs.
min.-Freqs.
max.-Freqs.
min.-Freqs.

min.

max.

max.-BFO
min.-BFO

or

min.

or

min.
max.
min.

min.

max.-*5
min.-*5

min.

V ae Pin 2 to Pin 8

V ae Pin 2 to Pin 8

operation

Freq. Control

operation

Freq. Control

below 7Ame

below 7Ame

above 7Ame

above 7Ame

below 7Ame

below 7Ame

above 7Ame

above 7Ame

Injection max.

Injection max.

by

[ 14 ]

TUBE

SOCKET

TERMINAL

RESIST

ANCE-TABLE

2

Resistance to chassis. Measurements made with Weston Model
Tube

removed from socket under measurement. Audio Gain Control at maximum, RF Gain Control at mini·

mum.

Limiter Switch

Socket

Pin No.

Tube

Socket

Y·I

Y·2

Y·3

Y-4 In£. Inf.

Y·4 19K

Y·S

Y·6

Y·6 22K 0 0

Y-7

l.8M

l.8M

0

47K

22K

980K

"OFF".

Z

0

0 0

Inf. 0 In£.

150 0

0 0

0

CW·MOD

47K

0

4

0 16.7K

0

0

Switch on

S

16.7K 50K 0

0 17.5K

Inf. 47K 0

19K 22K

17.4K

17AK

17.4K

"CW".

6

50K

47K 0

In£.

37AK

Inf.

663

Volt-Ohmmeter.

AVC-MAN

7

0

26K

l.1M

l.lM

390 freq. Bands above 7.4mc

8

15.6K

Switch on

9

"AVC".

MODEOFOPERATION

Crystal Freq. control pos.

Crystal Freq. control pos.

YFO

Operation

Freq. Band

Freq. Bands below 7Amc

Freq. Bands above 7.4mc

AVC

l.3S-3ASmc

tap normal.

1-6

1-6

Y-7

Y·8

Y-8 0

Y-9

Y-10

Y-ll

Y·12

Y·U

Y·14

Y-15

Y·16 125K

Y-17

Y·18

Y-19

980K

l.1M

l.1M

93K 0

1.5

0

69 K

0

118K

0 0

0

0 0

0

816K

In£.

500K

0

15.8K

1K

15.6K

0

15.2K

17.4K

0

117K 22K

0

17.SK

17.SK

17.SK 19K

0

17.SK

0

162K

0

lS.6K

0

0 In£.

0 0

470K

20K

42

48K 390

In£. 22K 0

9.5K

9.5K

115K

lOOK

0

196K

196K

0

17.4K

470K 680

In£. 360

40

Freq. Bands below 7Amc

Freq. Bands below 7Amc

0

0

0

0

•

0

0

15.8K

Freq. Bands above 7Amc

·0

to1K(BFO Injection control)

Y-20

49K

65K

49K 0 6SK

0

[15]

.

,.

.

ALIGNMENT.

VI:'

The

alignment

ceiver requires _predsion instrumentt

·knowledge

109 a doubleauper'heterodyne,

dure

Under

ment for

•

The

recommended method for aligning

IF

involves the useofa

erator and an oscilloScope. Since theae inSttuments are

not availableatthe

nate method

· erator
The

_alignment method will be covered in-a later paragraph.

_-

The

of

~e

·

proX1ma~y

be

reqwredtomake
able. A suitable adapter.
available as

of

is even more involved

normal serVice

ext~mely

low

and

additional -information required

si~algenentor

DUXer

Co., 117 N; Maul Street, Brockton,

meter should be connected across
of

the

·

receiver or

controls should

Control

Selectivity
Send- Receive
CW-Mod

Phasing -

AVe-Man

Audio Gain

RF

Gaul

.Band SwitCh

Dial

·

The

signal generator shouldbemodulated 30
centat400 cycles.
3kc

position
maximum. Set
kc

and

adjust.its

on

the

output

of

the

various alignment adjustments. Adjust L42,

L41

•.L39, L3S, L36 and
ducing
control as requiredtoprevent overloadorexcessive
output.

the'

Now

of

a modern communications

an~_

a thorough

the circuits involved.

thanisusual. -

the

receiver will Stay in align,

long periodsoftime, consequently

This

receiver,

the

alignment proce,

ALIGNMENT

frequencyIFshould be aligned first.

SVJeep

average service _station

using

an amplitude

an

output

meter will·

,shouid

tube

V.5

.01

mfd.A

P~

now

.

and

the

meter. Refertofigure 3 for

signal generator

tum

through'

oUniature

the

,mixer grid connection avail,

A/NNo.

No. 977fl'Om Alden Manufacturing

the

.~er

be set as follows: -

;See

Receive
Mod
Arrow
Man

Set for

See text

1.35 - 3.4.5

i.

.5

Tum

the
advance
signal generator frequencyto455

output

until some deflection is noted

Ln

th~

selectivitY

the

low frequency

frequency signal gen,

the

modul~d

be

be coupled'

a capacitanceofap'

Mass.

the

voice coil. .The receiver

signalgen'

deacribed6rsf.

fOr

the

to

the

tube adapter

CV,49519, ill

An

output

terminals

POIition

text

approx.20

mc

selectivity

the

RF

Jor

maximum outpUt,

output

and

switcll

volts

me

~tch

Gain control to

the

the

RF Gain

to

thellarrow'

re'

be'

OF

The

alter'

visual

grid

Will

output

per'

to

the

location

realignment should not be attempted unless all'other
possible
inated.
ment should
should

r~quired

slight

caU8e$ofa particular trouble have been.elim'

When

it has been determined that any realign'

be attempted, a

be exercised in making the adjustments, as any

readjustment should not entail more than a

angular motion of

gl'eatdeal

the

adjusting screw.

THE·IF-·S.TAGES

est

poSition;.2kc. and adjust the

quency'

c;orrectsignaLfrequency

--

If

should­frequency
dllaestahliilhment-of-crystal frequencytomake sure

. :.-that

d~ring

L36

'.

Now

.

-a(;ross the diode detector load resistance, froin
,junction of R64

re'

for

the

maximum output.

by

amplifier

tumtd'to

and

and adjust L37
ingthisset'up.theBFCbhouldbe
Qigthe
beat,
neceSsary L44 should be adjusted for
check and adjustmentofthe
the

Signal generator Carrler.uhmodtilated.

The
low frequency IF should
cept.that
amplitude and coincidence
The

.

The
the

band switch to
lectivity switch should be in
the

signal generator frequency to 3.955

L31,

The.
oscillator
erance and
multiplesof3.5
to

do
radiation from
temporarily
wire
of this lead around
oscillator tube
be removed except while in
standard.

'and

the

frequencyofthe

not:

be

-disturbed for the reJriainder

IFa!ignment,

the

<Signal

the' alignm.ent.

L32 are' again adjusted for

tUrn the: selectiVity switch

OW,Mod

with

procedure for

oscilloscope vertical input should be connected

high frequency IF should be aligned riext. Set

L33

3.5

this. in viewofthe

to

the

gene~tor

~be

3kcposition and L42, L41, L39; L38,

formaxi!.n\lm output. Before chang'

the BFO

the

adjustments are made for both maximum

and

and L34 for maximum output.

mc

crystal used in the second conversion.

circUit is heldtoa very close frequency tol,

maybeused as

this oscillator, it will be neceas3ry to
connect a two foot length
ailtenna terminal and

VS.This

unleuitshould be to recheck

The

switch.to.OWand

knQb

the

visual method of aligning the

be

R65 to

the

7,4 - 14.8 me band.

me

from10.S

the

si~nal

This

the

455 kc crystal for

si/(nal j:(enerator

frequency has not drifted

selectivity switch is now

muimum

to

the

~ed

checked for

dialatits

BFO should be done with

the

of

chassis~

the3kc

.afrequency

complete shielding against

tube shield on

test lead should,ofcourse,

~ro

~ro

same as

the

oscilloscope images.

position. Adjust

mc

upwards.

dr~

use

as

of

caution

generator fre,

establishes the

the

of

the

low

output.

1.3

kc.

position

onbythrow'

output.

the

me

~ero

reading;

This

above ex'

the

The

and adjust

standard

In

order

of

insulated

the

free end

the

3.5

a frequency

If

se'

at

me

[

16]

ALIGNMENT

To

adequately align

cillator an accurately calibrated signal generator and

an

output

quired are shown in table3.The

justments is shown in Figure3.The
and

Figure 3 should be made in following this

the

alignment which will now be described for one

frequency band.

followed for

To

is coupled to the antenna input terminal

100 ohm carbon resistor.

modulated
meter connected across the receiver
The

meter are required.

The

the

other

align

the

.54-1.35 me band

30

percentat400 cycles and

receiver controls should be set as follows:
Control

Selectivity
Send-Receive
eW-Mod
AVe-Man
Audio
RF
Band Switch
Limiter

Gain

Gain

OF

the

RF

same procedure should

frequency bands.

3kc
Receive
Mod
See
Set for approx. 20 volts
See text
set for band

off

THE

Amplifier and

The

frequencies re-

locationofthe

useofTable 3

the

signal generator

The

generator should be

output

Position

Text

to

the

be aligned

RF

HF

part

then

through

output

terminals.

AMPLIFIER

Os-

ad-

be

Set

the

receiver and signal generator dials to .56

The

RF Gain control shouldbesetatmaximum and

Ave

the
adjustment shown in Figure

maximum output.

of

L adjustments should be set for maximum output.
receiver
mc
be adjusted for maximum
beginning with the Osc e adjustment and
ing

a

RF.
til no increase in
Man
generator should be set for approximately 3 micro
volts.
checked for maximum output, adjusting the RF Gain
control as found necessary to maintain the output
approximately 20 volts.

Following
the
above.

-

and

and the C adjustments, shown in Figure 3, should

the

e adjustments for

This

procedure should be carefully repeated un-

switch should then be set to

The

remaining bands using

&

HF

OSCILLATOR

Man

switch set on

Then

signal generator dials are now set to

output

Land

the

e adjustments should now

frequencies, shown in Table3,align

AVe.

3,

should now be set for

the

Ant., 1stRFand

outputinthe

the

Ant,

can be realiz.ed.

Man

the

same procedure as

The

HF

Osc. L

2nd

same order,

then

1st RF and 2nd

The

AVe-

and

the

me.

RF

The

1.3

mak-

signal

be

at

TABLE

RF

AND

HF

OSCILLATOR ALIGNMENT FREQUENCIES

FREQ.
IN

RFfSHF
ADJUST

RF
ADJUST

30

Ave-MAN

BAND

MC

fS

HF

OSC

LAT.

OSC

CAT.

."'-1.35

.56 1.4 3.75 7.5 15.0 30.0

1.3

1.35-3.45

3."

TABLE

APPROXIMATE SIGNAL INPUT

Output

percentat400 cycles. Signals applied to tube grids through a

. BAND

measured across a 600 ohm resistive loadatoutput

SWITCH

Any
Any

1.35-3."5

1.35-3.45

1.35-3.45

1.35-3."5

1.35-3.45

7.40--14.8

7.40--14.8

switch on

mc

me
me
me
me
mc

mc

MAN.

CW-MOD

FREQUENCY

Audio 400 cycles
Audio 400 cycles
Mod RF 455
Mod RF 455
ModRF
Mod RF
Mod RF 455
Mod RF 3.955
Mod RF 3.955

455
455

ke
kc
ke
kc
kc

mc
mc

3.45~7.4

7.15 14.5 29.0 52.0

No.4

AT

IF & AF STAGES FOR20VOLTS OUTPUT

switch on

No.

3

AND

ADJUSTMENT DESIGNATIONS

7.4-1".8

terminals of receiver. RF signals modulated

.01

mfd. capacitor.

MOD,

RF Gam and AudlO Gam at maximum.

INPUT

Pin 7, V5

TO

5,

V17

Pin
Pin 2, V16B
Pin1,Vll

Pin I,

VI0
Pin I, V9
Pin I, V7
Pin 7, V5 90 microvolts

Pin 7, V6 100 microvolts

14.8-29.7

~lect~vity

29.7-5".0

switc~

APPROX.

5.5

15000 microvolts

300 microvolts

INPUT

volts

.5

volts

.6 volts

75 microvolts

70 microvolts

at 3

kc

,

[17]

..

",'

e

e

L41

o~o

e

L38

OT40

e

L37

OT30

8

e e

L42

I

L39

I

IEYe

.L:

L36

e

e

0120

L34

m I

r--------.,

I

T9

V6

.

________

®

V8

80

I

l

I

:J

0

GND

0

s

~c

. 0

ANT

0

L

Gc

0

.

1~

e~

,0

2ftF

0

@L

c

0

H~..

6?

'\

T8

.~

"

~

0

L32

0

Tt

0

L31

L52

-

(

V3

o

o 0 0 0 0 0

0000'00

o

000

t 2 ! " 5 I

T34

0 0

Om

.8

L~

)

iii

0

z

z

0

~

::;)

z

~

.~

::;)

D.

~

::;)

0

-"---------

5

0

5

10

15

20

TOP

SHOWING

•

AUDIO

CURVE-Audio
CURVE

- Overall
Selectivity switch in

Rf

OutpUt

Audio gain

VIEW

ALIGNMENT

AND

frequency amplifier.

fidelity

Gain

measured

OF

FIG.

OVERALL

at

set

for

~ontrol

.,"

3

20

across a

at

CHASSIS

ADJUSTMENTS

FIDELITY

2.5

me.

13

kc

volts outputat400

maximum

CURVES·

InputtoPin

Modulation

position.

600

ohm
fo,. bath curves.

resistive load.

2.

cycles.

-

visa

30

..

percent.

!

25

40

100

CYCLES

FIG. 4

PER

[18]

1000

SECOND

10,000

• SELECTIVITY CURVES

Overall

at

2 Megacycles

~

1000

100

NUMBERS

1,2

1

I'-

\

\

\

2 3

,

\ 1

'\

,

\

,

~

\

~

l

r\

\

\

1

DENOTE

AND3NON

45

\

\

\

\

.\

\

,

\

\

,

,

SELECTIVITY

CRYSTAL

6 6

-

SWITCH

4,5

54

POSITIONS

AND 6 CRYSTAL

II

r

,

3 2

, ,

I

I

I

T

J

7

J

T Ir

rr

,

,

iI

r

J

I

1

,

I

I

J

I

I

~

11

J

10

,

1\

,

\

J

I

I

J

,

,

I

I

T

J

T

~

1

15

10

\,

\

\

.....

,,~

505

KC

OFF RESONANCE

FIG.5

I;' I

J

~

~

....

,j

....

~~

J

10

15

[

19]

VII

CONVERSION OF

MODEL

The

SP-600 Receiver is designed for either table
cabinet
ordered,
cover plate since
rack models are ordered

a bottom plate
vent
train

conversion to rack mounting where table models have

been ordered and where the covers are desired.

kit number, 3I478-GI, shouldbespecified when order-

ing for

installing

plate, remove the two
by removing the three screws at
of

or

rack mounting.

the

receiver is

the

and

dirtotloose hardware from falling into

of

the

receiver.

A cover plate kit is provided, on separate order, for

this conversion.

The

following instructions should be followed when

the

cover kit;

the

large side mounting brackets

not

cabinet serves this purpose.

the

a top cover plate assembly to pre-

rear

RECEIVER

When

receiver is supplied

To

corner

table models are

supplied

install the bottom cover

with

nut

plate brackets

the

lower rear ends

and

replace these

a bottom

When

the

with

gear

The

TABLE

FOR RACK

two

nut

plate brackets with

ones from the kit, using the same screws. Remove the

nut

and lockwasher from the screw, nearest the bot­tom edge of the chassis, holding capacitor CIS1 (see
bottom
bracket, from the kit, using
which the
tapped (smaller end)
The

10-32 screws from the kit and the two
that
cabinet.
the

chassis and with pressure appliedatthe
plate, to slightly compress the rubber channel against

the

place with

them in the tapped holes in the brackets through the

clearance holes in the side mounting brackets.

of

bottom cover plate is now installed using the
previously held

To

cover with the angles facing downward toward

rearofthe

MOUNTING

the

two slightly shorter

chassis photograph). Install the short angle

the

same screw from

nut

and washer were removed. with the

of

the

bracket replacing the nut.

the

bottomofthe

install the top cover plate assembly, place

front panel, secure the assembly in

the

four 6-32 screws from the kit, engaging

receiver to

10-32

screws

rearofthe

five

the
the

[20

]

TABLE

No.5

Symbol

Designations

CIAtoH
C3

C5
C6
CS
Cg
Cll
C12
C14
CIS
C17
CIS

to

C19
C2S
C27
C29
C30
C32
C33
C3S
C37
C39
C40
C47
C49
CSO
C52
C53
C55
C57
C59
C60
C61
C62
C63
C64
C55
C66
C67
C68
C69
C70
C75
C77
C78
C79
C80
C82
C83
C85
C87

C88

C89
C91
C92
C93
C95
C96
C97
C98

C99
C102
CI05
CI06

CI07

CI08-109

CllO
Cll1
C1l2-ll3

C1l4

24

to

44

to

74

to

Capacitor,

8

Capacitor,

SameasC3

Capacitor,20mmf

Capacitor,

Capacitor,33mmf

Capacitor,
Capacitor,7mmf
Capacitor,
Capacitor,15mmf
SameasCll
Capacitor,
SameasC3
SameasC18
SameasC3
SameasC3
SameasC6
SameasC8
SameasC9
SameasCll
SameasC18
Capacitor,51mmf
SameasC3
SameasC3
SameasC3
SameasC6
SameasC8
SameasC9'
SameasCll
SameasC18
SameasC39
Capacitor,12mmf
SameasC3
Capacitor,
Capacitor,39mmf
SameasC3
Capacitor,
SameasC3
Capacitor,
SameasC3
Capacitor,
SameasC3
SameasCIS
Capacitor;
Capacitor,
Capacitor,S
SameasC79
Capacitor,
Ca,pacitor,10mmf
Capacitor,
Capacitor,

SameasC60

Capacitor,
SameasCI8
Capacitor,51mmf
Capacitor,
SameasC39
Capacitor,
Capacitor,65mmf
Capacitor,
SameasC39

104

SameasC98
SameasC3
SameasC98

SameasC69
SameasC98
SameasC18
Capacitor,

SameasCIS

Capacitor,

DESCRIPTION

variable,

sections

...........

.01

mfd

2400

1500
1000

100

2200

variable

85

mmE

220

3300
404

mmf

810

1200

120

190

379

mmf

610

.01

mfd

variable

270

mmE

mmf

mmf
mmf

mmf

mmf

mmf

mmE

mmf

mmf

mmf

mmf
mmf

mmf

.....

.....

.....

......

.....

.....

......

.....

.....

......

.....

.....

.....

.......

PARTS

Hammarlund

Part

No.

34001-G1
231134-8

23003-41C

...

230ll-40C
23003-45C

...

23011-62C
23061-168F

'"

230ll-58C
23061-155J C127

23003-94C

'.0

",

23003-87C

23023-65UJ C149
230ll-17C

'"

23003-47C

11726-G109

.'"

..

23071-59

....

23003-102C

...

230ll-69C

....

23071-67
23023-8UJ

....

23072-53
23003-2B

...

23011-60C

....

23071-50

....

23071-64
23023-45UJ

....

23071-63

....

23072-52
23071-5S
23034-8

.....

11776-G1

....

23003-104C

LIST

Symbol

Designations

C1l5-ll6
C1l7
C1l8
C1l9
C120
C121-122
C123

C124
C125
C126

C128
C129A, B

C130
C131
C132
C133
C134
C135
C136
C137
C138-139
C140
C141-142
C143
C144
C145
C146
C147
CI48

C150
C151

C152
C153

to

B,

155

C

C156-157
Cl58to160
C161A,

C162
C163
C16.4

C165-166

C167

C168-169

E2

E3

E4-5

E6

E7

ES

E9to12

E13

E14 6

E15-16 8
E17

E18

F1

F2

11to4

Jl

DESCRIPTION

SameasC3
SameasC69
Same

as

S Can,

Can,

asC143

as

as

HS

as

Terminal,

AVC

1.6A

Lamp,

C98

300

mmf

1300

Electrolytic.

2 x .05

Paper
27mmf
430

mmf

.25

mfd,

100

mmf

5100

.05

mEd

2500 mmE,

e12s"

.01

mfd

C3

3 :It20mfd,

Can,

.........

.25

mfd,

C3

Terminal,

Output

...........

Terminal

...............

Terminal

.............

Terminal

Terminal

Terminal
Terminal

Terminal

Terminal

.............

Fusetron

.........

No.

..............

input

socket,

...........

Capacitor,
Capacitor,

SameasC3

SameasC98

SameasC69
SameasC1l9
SameasC120
SameasC3

Cailacitor,10mfd,
Capacitor,

HS
Capacitor,
Capacitor,

SameasC8
SameasC131
SameasC39
SameasC3
SameasC98
Capacitor,
SameasC92
SameasC131
Capacitor,
Capacitor,

Capacitor,

SameasCIS
SameasC98
SameasC143
SameasC9S
Same
Capacitor,

800V

Same

Capacitor,
Same

SameasC98
SameasC128

Capacitor,

450V,
Electrolytic

SameasC98

.

Capacitor,

SameasC131
Same
SameasC98
SameasC152
4

Screw
Audio

4

Screw

and

Solder

1

(left)
1

Solder

(right)

2

Solder

SameasE4
SameasE6
10

Solder
Solder
Solder

15

Solder

3

Solder

(meter)
Fuse,
Fuse,%Amp
Dial

Mazda

Antenna

UG-103/U

.....

mmf

...

100V

mfd,

......

.....

..... 23003-109C

200V

....

mmf..,

.....

........

500V

600V

.......

Diode

strip
strip

strip.

.

Board

strip.
strip.

strip

strip

....

47

115959-1

Hammarlund

Part

No.

23003-105C
230ll-61C

15462-1
15461-1

23023-71UJ

23911-79E

23024-24SL
23015-16A
239ll-77E

23070-40

23072-11

15463-1
23915-1

31141-1
31480-1
16650-9
16650-11

16650-12

33928-G1
16650-10
31163-G1
3ll62-G1

31454-G1
15893-1
15928-13

16004-1

(-21

]

PARTS

LIST

(Continued)

Symbol

Desienations

J2
J3

JS
L7

LI4
L21
L22

L23
L24

L3S
L46

L47
L48

L49-S0
LSI

LS2
LS3

141

PI
P2

P3
P4

Rl

R2
R3
R4
RS

R6

R7-8
R9

RIO-ll

RI2

R13

RI4

R15

RI6

R17-18
R19
R20-21
R22-23

R24-2S
R26

R27

R28

R29-30
R31

R32

DESCRIPTION

IF

Output

SO-239 .

Phone
Power

RF

192
SameasL7
RF

Choke,Imillihenry.

RF

Choke,

10mi11ihenries
RF

25

RF

Choke,
SameasL7
RF

12

RF

3.0

RF

Choke,2ohmsdc..

RF

1st

Filter

170

2nd

440

IF

Output
Tuning
Power

Antenna

UG.I02/U

Antenna

Connector

Cable

PL-259

Resistor,

1/3

Resistor,

V2

Resistor.

lf2

Risistor,

1/2

Resistor,

V2

SameasR4
Resistor,5Iohms

lf2

Resistor,24ohms

V2

Resistor,22ohms

1/2

SameasR2
SameasRI·
SameasR3
SameasRS
SameasR4
SameasR7
SameasR9
SameasRIO
Resistor,

112

Resistor,

lf2

SameasRl
Resistor,

V2

Resistor,

V2

SameasR4
Resistor,

1/2

SameasR5

Socket,

Jack,

JK-34-A

receptacle

Choke,

microhenries

Choke,

millihenries

2.5

Choke,

microhenries

Choke,

millihenries

Choke,

Filter

2.7

Choke,

ohms

Choke,20Hy,

ohmsdc.,

Meter

plug

In~ut

Adapter

Connector

(for

S10K

watt

10K

watt

33K

watt

1000

watt

510

watt

watt
watt
watt

47K

watt

180

watt

150

watt

6800

watt

2200

watt

dc

transformer.

and

millihenrys

ohms

cord

Plug,

UG-I04/U.

J2)

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

....

8.5

Plug

16111-1

.
.

....

15618-1

.

15619-1

15615-2
15616-GI

15611-1

dc.

15613-1

Hy,

.

31030-2

.

31031-2

31488-1

.

..

.

16016-1

15987.1

.

16071-1

.

19317-76BF

.

19309-278BF

.

19309-282BF

.

19309-49BF

.

19309·170BF

.

19309-193BF

.

19309-189BF

.

19309-9BF

.

19309-89BF

.

19309·31BF

.

19309·259BF

.

19309-69BF

.

19309-57BF

Hammarlund

Part

No.

5066-1

35013-1
15612-GI
15617-GI

15627-1

4903-2
6143-1

II

Desienations

R33

R35
R36
R37

R38
R39
R40

R41
R42

R43
R44

R45
R46

R47

R48

R49
R50

RSI
R52
R53
R54
R55
RS6
R57
R58
R59

R60-61
R62
R63

R64

R65

R66
R67-68

R69

R70

R72

R73

R74
R75.76

R77
R78

R79
R80

R81
R82
R83
R84

R85
R86
R87-88

R89

Symbol

DESCRIPTION

Resistor,

lf2

Resistor,

lf2

Resistor,

1/2

SameasR31
SameasR35
SameasR3

Resistor,

1
SameasR31
Resistor,10ohms

1/2

SameasR35
SameasR2
Resistor,

V2

Resistor,

1/~

ReSistor,

112

Resistor,1megohm

112

Same
SameasR42

SameasR35 I

SameasR2
SameasR2

SameasR31
SameasR42
SameasR35
SameasR2

SameasR31
Resistor,

1
SameasR48
Same
Resistor,

V2

SameasR22
SameasR36
SameasR47
SameasR35
Resistor,

3300

SameasR2

Resistor, 7500

20

Resistor,

20

Resistor,

1000
SameasR35
SameasR22
Resistor,

V2

Resistor,

V2

SameasR31
SameasR35
SameasR2
SameasR4

Resistor,

500K

Resistor,

10

Resistor,

112

Resistor,

1/2

SameasR86

1500

watt

lOOK

watt

22K

watt

20K

watt

watt

240

watt

1100

watt

18K

watt
watt

as

R31 i

2200

watt

as

R35

27K

watt

variable

ohms

watt

10K

watt

variable

ohms

470K

watt

680

watt

variable

ohms

2500

watts

82K

watt

120K

watt

ohms

ohms

.

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

ohms

Hammarlunc

Part

19309-53BF

19309-97BF
19309-178BF

19310.179BF

19309-1BF

19309-201BF

19309.208BF
19309-79BF

I

19309-121BF

'I

,

'I

19310-57BF

19309.83BF

15366-1

19397-41
19397·43

15363-1

19309-113BF
19309-45BF

15342-11
19396-1

19309.287BF
19309-181BF

No.

122 J

PARTS

LIST

(Continued)

Symbol

Designations

R90

to

R93

R94
R95
R96
R97

R98
R99

RI00
RI0l

RI03to110
RIll
R1l2

R113

R114

R115-116

SlA,B,C,D
82

S3
S4
S5A,B,C
S6
S7
S8
S9
S10

92

Sl1

Tl

T2

T3

T4

T5

T6

T7

T8
T9

TI0

19309-133BF

19310-211BF

15342-4

19309-162BF
19309-241BF

/19309-125BF

.

31234-Gl
31469-1

..

part

111

37

31102-G2

134

..

Hammarlund

15879-1
15862-1

15856-1
15864-1
15866-1
15867-1

-

15880-1

31102-G2

31106-Gl
31086-2

31029-2

31131-Gl

31387-GJ

DESCRIPTION

SameasR2
Resistor,

50K ohms,

switch
SameasR46
SameasR86
SameasR36
Resistor,

If:z

SameasR78
Resistor,

1
SameasR35
Resistor,

25K
SameasR63
SameasR35
Resistor,

If:z

Resistor,

1/

Same as R4
Resistor.

Y2

'Switch

assembly

Cry
Crystal
Switch,

Selectivity
Toggle
Toggle
Toggle
SameasS6

Switch

ofR93

Switch,

return

Mixer

assembly,
C67, 69, 70, L31, 32,
R31 31183-Gl

IF

assembly,
C97, 98, 99, L33, 34
R35 31116-G2

Crystal

includes
112, 113, 114, L36,
R41, Y8 31114-Gl

IF

assembly,
C117, 118, 119, 120,
L38, 39, 40, R49

SameasT4,

C 123, 124, 125, 126,
L41, 42, 43, R54

Beat

assembly,

C130, 131, 132,

L44, 45, 46, R76,

Transformer,

Output

Transformer,

3.5

includes
L35, R38, 40, Y7

RF

includes
switch
SIA

variable

includes

S10 15342-21

3.3

watt

watt

watt
watt

2

watt

tal

Transformer

Transformer

Frequency

mc

Input

megohms

360

ohms

variable

ohms

390

ohms

330K

1.5

megohms

base

and

selector

switch

conversion

switch

switch

switch

switch
"ON-OFF"

DPDT,

plate

coil

includes

includes

Filter

CI07, 110,

includes

includes

includes

Audio

power

Osc.

assembly,

CI03, 104,

assembly,

C2, 3,Lland

contacts

ohms

sprtng

switch.

SPST

DPST.

DPDT.

spring

assembly

Osc.

13~

for

....

....

77..

.....

Part

No.

Symbol

Designations

Tll

T12

T13

T14

T15

T16

T17

T18

T19

T20

T21

T22

T23

T24

T25

T26

DESCRIPTION

RF

Input

includes
switch
SlA

RF

includes
and
for

RF

includes
and
for

RF

include~

L5
for

RF

includes

L6

for

RF

assembly,

C26, 27, L8, R7,

and
for

RF

assembly,
C28, 29, L9, R8,
and
for

RF

assembly,
C30, 31, 32,
107
contacts

RF

assembly,
C33, 34, 35, L11, RIO,
109
contacts

RF

assembly,

C36, 37, L12
switch
SIB

RF

assembly,

C38, 39, L13
switch
SIB

SameasT16

C46, 47, L15, R17, 104
and
for

SameasT17,

C48, 49, L16, R18, 106
and
for

SameasT18,

C50, 51, 52, L17, R19,

108
contacts

SameasT19,

C53, 54, 55, L18, R20,

110
contacts

SameasT20,

C56, 57, L19
switch
SIC

assembly,

C4,5,L2

contacts

Input

assembly,

C6,7,8,

switch

SlA

Input

assembly,

C9,

switch

SIA

Input

assembly,

C12, 13, 14,

and

switch

SlA

Input

assembly,

C15, 16,

and

switch

SlA

Transformer

Transformer

Transformer

Transformer

Transformer

Transformer

switch

SIB

switch

SIB

and

and

contacts

contacts

switch

SIC

switch

SIC

and

and

contacts

includes

contacts

includes

contacts

includes

switch

for

includes

switch

for

includes

includes

includes
contacts

contacts

switch

for

switch

for

contacts

10, 11,

contacts

contacts

contacts

LI0,

SIB

SIB

and

and

for

includes

includes

SIC

includes

SIC

includes

and

for

for

103

105

for

L3

17,

R9,

....

....

....

....

and

31390-Gl

31393-Gl

L4

31396-Gl

31399-Gl

31405-Gl

31386-Gl

31389-Gl

31392-Gl

31395-Gl

31398-Gl

31404-Gl

31386-Gl

31389-Gl

31392-Gl

31395-Gl

31398-Gl

Hammarlund

Part

No.

[23

]

PARTS

LIST

-Continued

Symbol

Designations

T27

T28

T29

T30

T31

T32

T33

T34

XI-2
X3
X4

X5

X6to15
X16
X17
X18
X19
X20

to

X21
Ylto6

26

DESCRIPTION

SameasT21,

C58, 59,
switch
SiC

HF

Osc.

includes

L25

and

contacts

HF

Osc.
includes
and

switch

for

SiD

HF

Osc.
includes
L27

and

contacts

HF

Osc.
includes
89, L28
contacts

HF

Osc.
includes
93,

L29

contacts

HF

Osc.
includes
L30

and

contacts

Crystal

includes
63, 64, 65,
L21, 22, 23, R23, 24, 25,

21to26 .

X3,

Tube

socket,

Tube

socket,

Tube

socket,
ceramic,
shield

Tube

socket,
ceramic,
shield

SameasXl
Tube

socket,
SameasX3
SameasXl
SameasX3
SameasXl
Crystal

for

crystals

Crystal,

note

below

L20

contacts
assembly,

C76, 77, 78,
switch

for

assembly,

C81, 82,

contacts

assembly,

C83, 84, 85,

switch

for

assembly,

C86, 87, 88,

and

for

assembly,

C90, 91, 92,

and

for

assembly,

C94, 95, 96,
switch

for

control

C60, 61, 62,

E7,

octal

miniature

less

miniature

with

noval

socket,

CR-18/U,

includes

and

SID

SID

switch

SID

switch

SID

SID
assembly,

8, 11, 12,

miniature.

center

center

ceramic,

YltoY6.

for

L26

.....

.....

see

.

....

.

....

....

....

.

.

.

Hammarlund

Part

31404-Gl

31385-Gl

31388-Gl

31391-Gl

31394-Gl

31397-Gl

31403-Gl

31409-Gl
15989-4

16082-1

15989-5

15989-3

16100-1

16092-5

31473-spec

No.

Symbol

Designations

Y7
Y8

Miscellaneous

DESCRIPTION

Crystal,
Crystal,
Chart,
Dial,
Dial,

Dial,

Dial,
Fuse
Knob

Knob
Knob
Knob
Knob
Knob

Knob,
Knob,
Knurled
Shaft
Shaft

Shaft
Snap

Spare
Spring,
Spring,

Spring,

Spring,

Spring,IFadjuster
Spring,

Spring,
Spring,

Window,
Window,
Wrench,

Wrench,
Wrench,

3.5

me

455

kc

frequency

band

indicator

Lamp

assembly

Gain)

Freq.
Phasing)
Gain)

(Selectivity)

soft

stiff

Detent

Switch

grounding

Coils
Coil

6 11806-2
8 11806-3
10

Socket

main

tuning

vernier

Holder

and
and
and

and

and

and

frequency

tuning

Coupling,

Coupling,
Coupling,

Button

fuse

assemblies

tuning
Dial
Dial

Osc.)

Dial

Dial

Dial

Skirt

lock

thumb

Plug

cover

anti-blacklash

Band

Change

Conversion

Crystal

Indicator
Retainer

Retainer

Band

Tuning

Set

Screw

Set

Screw

Set

Screw

(Audio
(Beat
(Crystal

(RF

(large).

screw

rigid

flexible
flexible

Retaining

Indicator

control

control

.....

Slide..

for

RF

for

RF

Dials.

No.
No.
No.

.
.

...

.
.
.
.

.

..
..

.

.
.
.

..

.

31130-1
31471-1
31463-1

31201-Gl

31453-1
31438-1
31439-1
15923-1

31227-G2
31227-G4
31227-G3
31227-Gl

31227-G5
31215-Gl
31434-Gl
31462-Gl
31495-1
31275-Gl

29619-2
31494-1

31239-1

31205-1

31125-1

31417-1

31023-1
31126-1

31004-1
31003-1

31282-1
31281-1

11806-4

Hammarlund

Part

No

415-G3
415-G2

NOTE:

Hamtnarlund

Crystal
madeinaccordance
CR-18/U.
plusorminus
ance

00.75000to07.39999

07.40000

07.40000on7.40to14.8

07.40001to12.04499

12.0450

44.0450

which
double

.

~ccurs

)//

with

NOTE:

Frequency

.to54.00000

the

conversion

at

Crystals

Specification

The

HC-6/U,orCR-7.

Signal

on

3.45to7.40

to

44.04499

Since

intermediate

the

high

supplied

Control

with

frequency

.005%.

Frequency

7.40
and

frequency

No.

Unit,

Signal

tolerance

The

holder

Me

band
band

meisthe

frequency

since

endofthe

on

special

31473,

see

Corps

shallbein

signal

this

order,

for

useinthe

page8,shall

Specification

shall

be

frequency

is

changed

signal

frequency

3.45to7.40

per

be

within

accord-

0.455000

0.455000

3.955000

3.955000

3.955000

3.955000
at

for

me

[ 24 ]

The

Signal

used

shallbestampedonthe

The

oscillator

given

signal

following:

Add

IF

Frequency

(see

note

(see

and
and

below)

note

below)

divide
divide

band

14.8meband,itis

as

for

sumby3
sumby4

and

wellasSignal

exactly

Frequency

or

frequency

Me

alsoatthe

necessarytospecify

7.40mesignal

Frequency

for

which

the

topofthe

actual

crystal

shallbedetermined

ModeofOperation

low

frequency

when

operation

.

crystalisto

holder.

frequency

from

Fundamental
Fundamental
Fundamental
Fundamental
3rd

Harmoni~

4th

Harmonic

endofthe

frequency

ordering

for

the

7.40
band

crystals

be

a

to

iI-

, -

-

;'-~l

--

.,

...

<

",

REAR

FIG.

VIEW

[25]

OF

6

RECEIVER

TOP

FIG. 7

VIEW

OF

RECEIVER

[ 26 ]

CAPACITOR

SHIELD

TOP

AND

VI

[27

FIG.

EW

OF RECEIVER

SPARE

]

8

FUSE

COVER

REMOVED

BOTTOM

TUNIN6

FIG. 9

VIEW

UNIT

OF

RECEIVER

SHIELD RElr10VED

[

28]

Note1:T2-IF
earlier models,

!/z

watt-19309-208BF.
31116-G2
be checked

and

when

Transformer-31116-GI,used

contained

is re-locatedonE-13.

making

<0

R94,

Resistor, 1100

This

resistorisomitted

This

replacementofT2.

'"

ohms,

should

in

in

Note2:Items

C163,
are locatedonE13.
catedonthe

Note3:Ignore

front

items

end

R48,

Items

of E 17.

CI63,

R94,
CI65

R48

R115

and

and

and

RI16

R53 are lo-

R53.

._

.......

--:::;;lI~-R83

!.__.....

~

__

':.Iiiii

..

,.:....l

R86

XI9

..,...-CI51

T7

CI02
54

£3

£2

CI50
CI69

R70

XI7
CI49

RIOI

R81

CI48

-XI6

......

CI47

J2

L53

£5

R80

BOTTOM

VIEW

FIG.

OF

[

29]

10

RECEIVER

SP-600tJX

C 71

C74---+_..l:

C

79

-_--'+-_-=

R

29

---t--:~

R30-_-..I:~

51C

----l

R26

CI54-

__

516---,;

.....

~.

X2---+--:,

RII---t=:;c-,,.....,..

RI3

-_"'!~~'£~.

....

C25--=---lt~~:~~~~L!t::t~~~~~~_

CI65

C41

51A
CI9

L48

C23

R2

BOTTOM

VI

FIG.

EW

0 F

II

RF

CI53
C21
R3

RI

CI8

R4

JI

PLATFORM

[ 30 ]

R25

BOTTOM

VI EW

e61

E7

FI

Of

FREQUENCY

[31]

G.

L21

12

X3

CONTROL

UNIT

IOOuJ

ANT.

INPUT

1ST

RF

VI

68A6

FREQ.

CONTROL

I

I

I

I

I

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I-~~M~ER

R24

180

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V 5

1

I

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FIG.

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13

OF

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a:

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V.

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10K

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-----

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1.5

MEG

OF

DIAGRAM

IF

-<?'-

FIG.

__

-+-

...

_-_-_-_-~-

--_/

13

OF

_l~

.

....I

YH-"'-IOV.

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15

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...

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8

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57

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CI48

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2

-'"

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CD

II::

OUTPUT

[33]-[34]

MAIN

E3

..

,

ORANGE-GRN

BLK

BLK

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U~~F:;'-+WH-BLU

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WH-BLK

WH-BLK

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RD-WH

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,-

0 0 0

©>

TERMINAL

LOCATED
ON

NOTE: SWITCH IS MOUNTED
ON
BY
2-3

1-2

T9

REAR

o

0 0

--,

o

OSCILLATOR

BOARD

OVER

BOTTOMOFCHASSIS.

VB

BLACK

13

TUNING

BANDSWITCH

CLOSED BELOW 7.4

CLOSED ABOVE 7.4MC

a V6 SOCKETS

UNIT

OPERATED

T9

FRONT

[!H~Qj.fQ]

'----

MC

000

o

1

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II

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0

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w

:s

IX

R43

CONNECTION

FIGURE

DIAGRAM-

[35)

NUMBER

RECEIVER

-[

36]

14

CHASSIS

'*

THESE
ONLY.

TERMINAL

NUMBERS

THEY

DO

STRIP.

ARE

FOR

NOT APPEAR

59

REFERENCE

ON

J.fj

MAIN

E3

L53

WHITE

ORANGE-GRN

LACK-WHITE

(/:;::==t:==::::t~BLK

a~=K'..l

BLK

YEL-BLK
WH-BLK

WH-BLK

D-WH 0 0 0

RD-WH 0

RD-GRN

T9

..--_~~"'-'-'---_--,

REAR

L.l:~~~=t:-+WH-BLU

D-GRN ©

©

0 0

OSCILLATOR

TERMINAL

LOCATED
ON

OVER

BOTTOMOFCHASSIS.

NOTE:

SWITCH IS MOUNTED

ON

TUNING

BY

BANDSWITCH

2-3

CLOSED BELOW 7.4

1-2

CLOSED ABOVE 7.4

BOARD

VB

a V6 SOCKETS

UNIT

OPERATED

[!H~hP.fQJ

MC
MC

000

0

:l':

Co)

41:

:l':

....

....

m

I

~

:t:

I&l

~

It:

~

R43

13

BLACK

'-----t'li

!:

II

II

C\I

CONNECTION

FIGURE

DIAGRAM-

NUMBER

[35}

-[

RECEIVER

36]

14

CHASSIS

*THESE NUMBERS ARE

ONL~

THEY

DO

TERMINAL

NOT APPEAR

STRIP.

FOR

S9

REFERENCE

ON

E3

L53

(AF METER ADJ)

MAIN

NOTE:

SWITCHISMOUNTED

ON

TUNING

BY

BANDSWITCH

2-3

CLOSED

1-2

BLK

1J?:=~:::::::tClYEL-BLK

;-;=~+==1\",-1

BLK

WH-BLK,­WH-B

LK

RD-WH
RD-WH

RD-GRN

000

T9

REAR

o

CLOSED

---,

UNIT

BELOW
ABOVE

T9

a~~t==r,:.--tWH-BLU

RD-GRN

©

OPERATED

7.4

MC

7.4

MC

FRONT

000

o

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WHITE

0

C129B

.05uf/SOQV

CI29A

.05uf/50DV

0

© 0 0

OSCILLATOR

TERMINAL

LOCATED OVER va aV6SOCKETS

ON

BOTTOM OF CHASSIS.

BOARD

[§"H~~.fQJ

BLACK

13

AF GAIN

'-----!l,l

(\J

II

II II

:ll::

o

<l:

~

SEND·REC

II

:I

-

FIGURE

CONNECTION DIAGRAM- RECEIVER CHASSIS

BLACK-WHITE
BLACK-WHITE
BLACK-WHITE

NUMBER

14

*

THESE
ONLY.
TERMINAL

NUMBERS

THEY

STRIP.

DO

ARE

NOT

FOR

APPEAR

SWITCH

S9

REFERENCE

ON

[35}-[36]

BARE

TO

C60ONFREQUENCY

CONTROL

NOTE:
CLOSED

1-6OFS2.

SHOWNINVFO

UNIT

THIS

ON

SWITCH

POSITIONS

POSITION.

YELLOW-BLACK

=1~=~

NOTE: NUMBERS
SWITCH-BASES ARE

SAME AS
ON

SCHEMATIC DIA-

GRAM

FOR
BASES AND
AND SWITCH
ASSEMBLIES.

THOSE

SWITCH

COIL

ON

BLUE-BLACK

TO

CHASSIS

T2

TERMINAL

16S.

TI

GREEN-WHITE
TO

CHASSIS

EI4

TERMINAL

EI4

TERMINAL

FIGURE

15

CONNECTION DIAGRAM

TUNING

*

THESE

NUMBERS

8
7

THEYDONOT

ARE

FOR

APPEARONTERMINAL

REFERENCE ONLY

UNIT

STRIP

TO

C60ONFREQUENCY

CONTROL

NOTE:
CLOSEDONPOSITIONS

1-6OFS2.
SHOWNINVFO

UNIT

THIS

SWITCH

POSITION.

GREEN-RED

NOTE: NUMBERS

-.7-lL--~

YELLOW-BLACK

SWITCH-BASES
SAMEASTHOSE

ON

SCHEMATIC
GRAM
BASES
AND SWITCH
ASSEM

NOTE: THIS IS THE 7-WIRE RF DECK. IT HAS THE SEPARATE
SCREEN SUPPLY FOR
VALUES OF

NORMALLY

R3

BE

V1

AND V2 (GREEN-RED WIRE). THE
AND R14 ARE 3.3K HERE. THEY WOULD
33K.

FOR

AND

BLI

SWITCH

COIL

ES.

ON

ARE
DIA-

BLUE-BLACK
TO

CHASSIS

T2

TERMINAL

168.

TI

GREEN-WHITE

TO

CHASSIS

EI4

TERMINAL

EI4

TERMINAL

FIGURE

15

CONNECTION DIAGRAM

TUNING

TO

R72ONCHASSIS

*

THESE

NUMBERS

8

7

THEYDONOT

ARE

FOR

APPEARONTERMINAL

REFERENCE

ONLY

STRIP

UNIT

Notes

[

38]

?

8LP.-WH

Cli

T

T34

o

o

e

e

FEED

THRU

TO

WITCH

SEE TUNING UNIT DIAGRAM

85

C

0

_1_

L..-

---,

• THESE NUMBERS ARE
THEYDONOT

APPEARONTERMINAL

FOR

REFERENCE

STRIP.

ONLY.

FIGURE

CONNECTION

FREQUENCY

[39

]

16

DIAGRAM

CONTROL

UNIT

BLK-WH

T

CI61

TO

CI61

RED

T34

*

THESE
THEYDONOT APPEARONTERMINAL

NUMBERS

ARE

FOR REFERENCE

ONLY.

STRIP.

CON NECTION DIAGRAM

FREQUENCY

[ 39 ]

TO

SWITCH

SEE

TUNING

FIGURE

CONTROL

S3

UNIT

16

C65

DIAGRAML-_

UNIT

12pf

C

_6_

FEED
THRU

0

-----.J

VII

SUPPLEMENT

MODELS

Frequency

JLX

have a frequency rangeof.100 to .400 me and

1.35 to 29.7mein

Crystal Frequency

not have

the

in

the

to
they do not apply to Model SP-600-

ModelSP600-

Control

In

Position

Range--

the

Frequency Control Unit. All indications

text, photographs

Frequency Control

Models SP-600-JLand SP-600-

six

bands as follows:

.100 to .200
.200to.400

1.35 to 3,45

3.45 to 7.40

7.40 to 14.8

14.80 to 29.7
Control-

and

me
me
me
me
me
me

ModeLSP-600-JLdocs

diagrams, with reference

Unit,

should be ignored as

JL.

JLX

Unit

as described in

of

includes

the

Crystal Frequency

the

text.

FOR

SP-600-JL

DESCRIPTION

USE

WITH

AND

SP-600-JLX

Alignment

With

HF

Oscillator, see page 13,

the

for

For

of

theRFAmplifier

reference to alignmentofthe

.100 to .200 mc

the

.100 to .200 mc

and

and adjust C at .200 mc.

the

For

and

Parts

SP-600-JLX -

23

and

.200 to .400mcband;

adjust Cat.400 mc.

List Errata

and

With

24

reference to Table

Delete Items TIO, 16,22and

54~o1.35

for

Delete Items

for 29.7 to 54.0

Add

to Parts List

me

and .200 to .400mebands:

mc

T15,
mc

band).

21, 27

band).

the

following, for

andHFOscillator -

RF

Amplifier and

the

alignment frequencies

.200 to .400 me bands are:

band;

Addenda

AdjustLat

Adjust

for SP-600-JL

.100 me

L at .200 me

No.5,

T28

(coil assemblies

and

T33 (coil assemblies

the

.100 to .200

HaMmarlund

Part

and

pages

No.

TI0

T16

T22

T28

TIS

T21

T27

T33

RF

Input

capacitor

RF

Transformer

1st

fixed

shunt

2nd

RF

Transformer

fixed

shunt

shunt

resistor

HF

Osc. assembly,

capacitor

23071-65, coil

RF

Input

capacitor

1st

RF

Transformer

fixed

shunt

RF

2nd

HF

Transformer

fixed

shunt

shunt

resistor

Oac. assembly,

capacitor

23071-66, coil

assembly, .100to.200 me, includes C2 trimmer,43mmf

Pt.

No. 23063-68C, coil

assembly, .100to.200 mc, includes C26 trimmer,43mmf

capacitor

capacitor

Pt.

No. 23003-91C,

and

assembly,

Pt.

No. 23063-68C, coil

capacitor Pt. No. 23063-68C, coil

capacitor

Pt.

No. 23003.90C,
and

Pt.

No. 23063-68C, coil and switch contacts

assembly,

Pt.

No. 19309-182BF and switch contacts

.100to.200

switch
.200to.400

assembly,

assembly, .200to.400

Pt.

No. 19309-182BF and switch

.200to.400

switch

.100to.200 me, includes

Pt.

No. 2£063-68C, coil, 200,000

me, inclu:les C76 trimmer,75mmf
102

contacts

mc, includes C16 trimmer,43mmf fixed

.200to.400 mc, includes C38 trimmer,43mmf

Pt.

No. 23063-68C, coil, 200,000

mc, includes

204

contacts

SUPPLEMENT

MODEL

This

Receiver-Model SP-600-J25 (25 cycles) does

not

have

the

Frequency

in

the

text, photographs

to

the

Frequency Control

theydonot

The
cially designed
cycle power line

apply to Model SP,600-].

Power

Transformer

for

and
line frequencies from
terminal primary voltage taps are provided.
taps cover a power line source rangeof90to270

Control

and

Unit. All indications·

diagrams,

Unit,

with

should be ignored as

used in this model is spe-

operation

on

a single phase

will operate satisfactorilyonpower

25

to

60 cycles.

reference

Eight

SP-600-J

25

screw

These

and

switch

contacts

mmf

for

and

mmf

for

FOR

fixed series

SID

switch

mc, includes C58 trimmer,43mmf

C94

fixed series

SID

...."..........................

USE

(25

volts.
er

is shipped from

ceiver

padder

...............................

contacts

and

switch

contacts

trimmer, 68

padder

WITH

CYCLES)

The

117 volt

is

installed for operation make sure

primary tap lead on

the

transformer

to

the

power source voltage.

The

manufacturer's

power transformer,

exceptions this receiver is

JX

in all respects.

for

SIA

............

C46

trimmer,43mmf

ohm~watt

for

SI

cap:lcitor

for

SIA

.............

contacts

ohm~watt
for

SI

mmf

capacitor

tap

the
the

tap

which most nearly agrees

T8,

fixed

shunt

for

SIB

fixed

...........

fixed

shunt

Pt.

No.

shunt

for

SIB

fixed

...........

fixed

shunt

Pt.

No.

is connected

manufacturer.

..

..

31381-01

31380-02

31380-01

31379-01

31384-01

31383-02

31383-01

31382-01

when

When

the

receiv-

the

that

re-

the

power transformerisconnected

with

part

number for

is 31029-3.

the

same as Model SP-600-

the25cycle

With

the

above

[40

]

May

1956-1M

lithoinU.S.A.byD.L.Terwilliger

Co.