McMartin B-910, B-910T Instruction Manual

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1

INSTRUCTION MANUAL

8-9101·

10

watt

FM

Exciter/Transmitter

TECHNICAL

II

INTRODUCTION

III INSTALLATION

UNPACKING

IV GENERAL CIRCUIT

DESCRIPTIONS ... . . . . .

V

OPERATION .......

VI

CALIBRATION

VII

STANDARD

CURVE. . . . . . . . . . . . . . .

VIII

FCC

STANDARDS

IX

PARTS

X

SCHEMATIC

SPECI

...........

AND

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

PROCEDURES'

PRE-EMPHASIS

...........

LIST

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

DIAGRAMS

FICATIONS

....

. .

.....

.......

..

..

..

2

3

4

11
12

16
17

17

23

The

8·910

and B-910T
part 73 of
operation,
B-1l3
type

the

FCC

and with

Stereo/SCAassemblies,

accepted

for

are

type

Rules

and Regulations

the

addition

stereophonic

accepted

for

for

of

the

8-110

this

equipment is further

and/or

SCA

use

under

monaural

and/or

operation.

I.

OPERATING

RF

OUTPUT

POWER: ...•.

RF

OUTPUT

IMPEDANCE:

CENTER
FREQUENCY

STABILITY: .............

MODULATION
CAPABILITY: .

AUDIO

IMPEDANCE: ......

AUDIO

LEVEL: . ........... .........•...... ...........

AUDIO

RESPONSE: ... .

RANGE:

..........

...•............

...

INPUT

INPUT

FREQUENCY

.. .......

....

Specified frequency in
ronge.

6·

910

. . iusloble. 6·

10 watts n

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

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

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

. . •

....

. . .

.....•........

:!:

0.5

db

emphasi s)

E

x cite~

:

910T 10 watt

omina

30

Hz -

2·1

5W co

l.

. ....... ..... :t 500

.....

.......

600

15

kHz (75 usee pre·

TECHNICAL SP

88

to

lOa

MHz

nt

inuousl y ad·

rransmiller:

. .

..

50

ohms

Hz

. !

150

kHz

ohms, ba

lanced

t

10

! 2

dBm

,

ECIFICATIONS

AUDIO

FREQUENCY

RESPONSE:

DISTORTION:

STEREO

SEPARATION: . .

FM

NOISE:

PILOT

RANGE: ....

SUBCARRIER
SUPP

CR

OSSTA

A

UDIO

LEVEL: .... .

. . .

......

...

. . .

.......... . Greater than

STABILITY

. . . . . •.

RES

SION: ........

LK: ...........

INPU

T . .

...

[8SD~(Q)I·

.. . ± 0.5

.. ............•.•.

.•....

. . 39

....•...•

. .

•...•....•....•... .....

dB,

30

Channel

dB

through exciter

ti

on

! 1

......

................ . 55dB

47

dB

50

dB

4

0dB

S

CA

- 15,000

0.5%

or

greater, module only

65

Hz over rated temperature range

or

greater, less 15kHz LP Ii Iters;

(30·50

00

(10-15 kHz) with filters.

or

(50

dB

Hz)

Hz

Ius,

- 15000

below

; 45

. . .

Loft

30

- 15,000

Hz)

100%

dB (5·

.. + 10

or

modulo

or

10

, ± 2

Right

Hz

35

dB

greater

kHz);

dBm

-

TOTAL

AF
HARMONIC

DISTORTION: ......•...

FM

NOISE: ...........

AM

NOISE: ........

POWER

REQUIRED: .•.•.....

OPERATING
TEMPERATURE

MECHANICAL

8.

910

8.910T Transmitter ................

WEIGHT: ........... _ ..

FINISH: ...

: ....................... . . . -201>

:

Exciter

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

. . . . . .

...

.......

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

. . . 115 VAC

wo

50

...

...

. .

.......

. .

.. _ ................. -25

McMo

access

STEREO

EMISSION:

AUDIO INP

IMPEDANCE:

A

UDIO INP

LE

VEL: ... ......

......

. .

_. _ ............

UT

......

. . . . • . . .•• Lo

UT +

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

1/74

.......

. .

. .

68

dB belo

....

or

230 V

tts

. .

(W

) 19"

rtin beige w

ponel

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

ft

Channol

RighI

Channel

..

0.3%,

30

Hz -15

w

100"

;';

65

dB below carrier

AC,

:!:

1

5%,

to +

500 Ce

(E

IA

Std. Rock

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

Ibs

30

lb

•. (B·

ith woodgrain trim

. . .

...

600

ohm~,

600

ohms, bal

10

•. ,

kHz

m

odu

lat i

on

lev

50 _60

Hz

lsius

"'-'unl)

(H) lOt "

(0)

17

:"

. (W) 20"

(H

) l

W'

(0)

18"

. (6·910)

910T

fron

. . 3

00

ba

lanced

anced

± 2

dBm

IN

PU

T

IMPEDANCE: ...........

SCA

CARRIER

FREQUENCY: ..........

el

SCA

CARRIER

STABILITY: .....................

M

ODU

LATION

CA

PAB

ILIT

Y: .......

PRE·

EMPHASIS:

FREQUENC

RESPOHSE: .............

CROSSTAL

MA

IN INTO

SUBCHANNEL

C

ROSSTALK

SUBCHANNEL

INTO

}

DISTORTION:

t

FM

F9

AUT

REMOTE

MAIH

NOIS

E:

OMATIC

Y

K -

......

-

..........

.......

.......

MUTE

CONTR

. . . . . . . . . .

41
quencies "re avoilable

........

. .. ....

.. 150

usec avai lable

..

.

. 0.75% or less,

2.5%

....

60

deviation)

: .. .

Adi

modu

varia

..

seA

Iro
tral clos ure

OL:

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

kHz

Or

67

kHz

.

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

....

. .

..........

mic

roseconds, standard; 50

on

request

. .

.......

...

. ±

1.5

60

dB

Or

greater below

60

dB

Or

greater belaw

50

or

less,

dB below 10

USloble to a

lati

on and

ble mu

su

bcarrier moy

nt panel

50

1

50

usee

ny

te delay

swi

tch

- 5,000

- 5,000

0% modulati

3%

. . . . .

600

standard (other

On

special order)

...... ± 500

1:

7.5

kHz (100

dB

,

SO -SOO

program

program

Hz
Hz

modu

be

by

held
a remot

on

sis

lation, with

de-empha

level between

or

ohms

or

O

levels

level

LP

lilter

BP

Ii

rt 6kHz

100%

on

by a

e can·

fre-

Hz

%)

75

Hz

Iler

. , -

The

McMartin

10

watt

FM

the

most

recent
modular
ing
stereo,
by

modes.

and

the

design

Federal

accommodated

II.

INTRODUCTION

8-910

broadcast

direct
allows

All

possible

SCA

operating

Communications

by

use

modular

transmitter

FM

FM

exciter

designs

sol

id

state

complete

flexibility

comb~nations

modes

presently

Commission

of

optional

and

incorporate

technology.

in

of

monaural,

authorized

plug-in

8-910T

The

operat-

may be

modules.

SCA
carrier
Modules
on

special

be

turned
minals.
or

75

quest.

channels

frequencies

for

other

order.

on

or

150

microsecond

microsecond

are

available.

subcarrier

The

off

available

individual

remotely

preemphasis

preemphasis

The

standard

are

41

kHz

frequencies

SCA

through

is

rear

available

SCA

and

67

are

avai

generators

chassis

is

standard.

sub-

kHz.

lable

may

ter-

50

on re-

Electrical
the

requirements

and

Regulations.

ards

will
purpose
formance

A

tabulation

the

equipment

table

will

in

the

event

The

8-910T

pass

output

Mon

aural

The

standard

monaural

locator

wired

diagram.)

for
operation
includes
equipment.

seA

Operation

When

operating

parameters

be

found

of

aiding

of

the

of

serve

trouble

consists

filter

Operation

8-910

operation.

later

by

insertion

six

of

conservatively

of

Part

A

list

in

the

the

broadcaster

8-910

equipment.

actual

received

performance
is

as a reference

occurs.

of a 8-910

and

cabinet.

unit

(See

The

8-910

conversion

of

the

nine

in

the

73

of

of

minimum

rear

shipped

far

is

equipped

Figure

exciter

to

appropriate

possible

monaural

the

Commission

broadcast

of

this

in

checking

measurements

with

operating

exciter,

with
1--Plug-in
main

stereo

modules

mode,

meet

manual

the

plus a low-

modules

frame

or

stereo/SCA

modules.

as

two

or

exceed

Rules

stand-

for

the

the

per-

for

unit.

This

parameters

for

module

is

pre-

This

standard

optional

Stereo

Stereo
Module

place

sion
to
for

Operation

operation

in

of

the

in

Position
process
modulation.

additional
modated.
whi

Ie

operating
spectrum
19

kHz

vided

simple

a

remote

pilot

on

control

is

the

contact

Functional

Alarm/Control

Automatic
two

ways.

high

frequency

paring

the
frequency
nal.

For

deviations

of

an

IF

signal

age

from

the

employs a plug-in

Position

single

.:0

1.

the

left

When

67

kHz

sub

The

41

kHz

stereo

used

by

subcarrier

front

of

closure

operation.

Diagram.

Circuitry

off-frequency

First,

by

phase

output

detector

frequency

and

in

removes the

power

amplifier

Oc

2 and a

module

The

and

right

operating

channel

sub

since

the

L-R

is

controlled

the

stereo

on

See

detection

sampling

comparator,

utilizing

excess

Dual

used

in

dual

audio
channel
in

the

option
channel
thi s part

stereo

generator

the

rear

Fig.

the

AC

and

to a crystal

the

of

100

DC

collector

module.

Stereo

Audio

the

monaural

module

audio

stereo

may be

is

not

of

the

information.

by a

module

of

the

3,

System

is

accomplished

component

secondly,

resulting
kHz,

the
supply

Generator

Module

is
signals

mode,

accom-

available

composite

switch

or by

exciter

810ck

of

controlled

IF

absence

volt-

in

ver-

used

an

The

pro-

for

In

the

com-

sig-

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11/73

[850®lJ@1·

III, INSTALLATION

After

unpacking
should
If
ping
said

ly
the
for thi s

Module Complement

.1
'

.2

113

~

.5

;t6 Alarm

. 7 RF Power Amplifier RF

118

In

includes

and

McMartin
sonnel
citer
ning
tribute
exciter

be

any

damage

agency

action.

positioned

Plug-in

purpose.

Stereo

Dual Audio
Stereo
SCA

11

Modulated Osci Ilator

Reference

Power

addition

a module

repair

completely
before
based

to

.

the

FM

conducted

is

and advi

Check

in

Module

Generator

1 (if

used)

Generator

and

Control Alarm

Supply

to

the

purposes

Industries

proceeding

on

stable

to

noticed,

se

to

see

their

Locator

Regulator

above

extender

.

recommends

fam i

good

engineering

and

AND

exciter,

reveal

immediately

McMartin

that

respective

Diagram,

items

card (PI N

liarize

reliable

with

themselves

installation.

a thorough

any

all

Mono
SCA
SCA
Modulated

Reference

PowerSupply

each B-910

operation

UNPACKING

shipping

notify

Industries,

modules

locations.

Monaural

*2
.1

Power

that

practices

are

should

Audio

(If

used)

(If

used)
Osci
Generator

and

Control
Amplifier

FM

555009)

installation

with

Early

of

inspection

damage.

the

ship-

Inc. of

secure-

Figure

be

used

lIator

Regulator

Exciter

for

test

per-

the ex-

plan-

will con-

the

B-910

All

using

Power
The

exciter

single-phase

1,

ation.

proper

front

A.C.

Power
The
voltage
made
sis

wiring

IN

ground .

to

shielded

Requirements

power

transformer

may

For

230Y

transformer

panel

fuse

BlK

BlK

I RED I

WHT

BlK/WHT

Transformer

B-910

of 117 YAC, ±

to

TB-1

the

B-910

should

wire

to

prevent

located

be

operated

sources.

___

wi

II

terminals 1 and

Factory

operation,

primary

with a 1I2A

--'

FIG

Connections

operate

be

RF

an

from

either

wiring

refer to

connection.

slo-blo

E
E

E

. 2

satisfactorily

15%

AC .

2. Terminal 3 is

installed

pick

the

115 or 230 YAC

is

Figure 2 below

fuse.

RED

RED

RED
BRN

BRN

BRN
BlU

BlU I WHT

BlU

Power

in

up.

top

rear

for 110Y

Replace

I

YEl

35V

/

WHT

l2VCT

lOY

with a

connection

conduit

of

the

oper-

for

the

1.6A

IA

CT

IA

line

is

chas

-

Mechanical

The

modular
removal of
routine inspection
easily
dle

provided.
removal
top

cover

and

meter

r

--------------,

)

,~

I AUDI O I

IDELETE L
,

SeA

Ir

4

------------:..J

I
I

approach

practically

removed

Access

of

the

is removable for

amplifier

STEREO OPTI

and

by

exerting

screws

.

DUAL

used

all

to

21 S T ERE 0 I I

--

GENERATOR I J

MONAURAL

AU

D I 0

SCA

# 1

OPTIONAL

SCA

oJ

OPTIONAL

2

in

the

B-910

components

maintenance.

a forward pull on

the

rear

of

securing

access

ON

the

to

I'

R'

provides

for

service

Each

module is

the

the

cabinet

rear

panel.

the

meter

FIG, 3 SIMPLIFIED

easy

or

han-

is

by

The

switch

BLOCK

Input-Output

lB·l

1

2

3

4

5

6)

7)

Phase Lock

8)

FUNCTIONAL

Connections

Indi

DIAGRAM

cator

115VAC
115

VAC

Chassis

Ground

(Normally Closed
(Norma

lIy

(Pole

Open

":"

11/73

-3-

lB

-2

1

2

3

4

5

6

7

8

lB-3

1

2

3

4

5

6

7

8

Stereo

Generator

Exciters
Assembly
stereophonic

If

the

Stereo

date,

the

assembly

Modu I

e, a B-

Pass

Filter.

tion

of

the

To

install

of

the

B-910.

top

of

the
holding
are

these
Connect
nal,
of

and

now

Cables

two

and

the

fi
replace
equipped

it

the

the

Iter.

Assembly

which

as

part

include

of

operation

Generator

will

112

Stereo

See

Figure

B-lll

and

the

Band

Pass

Remove

unit,

by

removing

in

place.

No. 34 and 35.

cables

to

red

lead

red

lead

Secure

the

rear

for

stereophonic

the

the

RF
RF
SCA ~ 1
SCA n 1

SCA
SCA ~ 2

Connect
Ground

Monaural
Monaural
SCA
SCA
Stereo
Stereo
Stereo
Stereo

the

an

original

when

Assembly

consist

Generator

1 for

B-112

Filter,

the

Directly

"GND"

of

cable

of

cable
fi

Iter

cover

power

amp

power

amp
Audio
Audio

1/

2

Audio
Audio

to

ground

audio
audio i'nput -black

1/

1

Remote

1/

1

Remote

left

audio

left

audio

right

audio

right

audio

B-ll0

order

received.

is

of a

Modu Ie

the

proper

modules.

remove

sma

II

pi

ate

the

four

below

Solder

the

terminal

34 to

35

to

to

the

of

the

unit.

operation.

DC

voltage

DC

voltage
Input
Input

Input

Input

for

stereo

input -red

Contro
Control

input -red
input -black

input -red

input -black

Stereo

are

ordered

B-lll

module

the

located

machine

the

plate

black

of

the

"OUT"

the

"IN"

top

of

The

interrupt
interrupt

operation

I

(+)

(Ground)

Generator

ready

for

at a later

Dual

Audio

and a Band

loca-

rear

cover

on

the

screws

location

leads

of

the

fi

Iter.

termi-

terminal

the

exciter

exciter

is

oscillator

proximately

signal
frequency
thousandths
88

to

output

8.8

to

the

output
ence
MHz
two
derived
the

reference

and

converter

frequency

0.25-watt

is

sampled

in

the

of

108

MHz

frequency

10.8

kHz

frequency

crysta I osc i Ilator

(one-tenth

frequencies

from

the
oscillator,

phase-to-voltage

provides

variable-capacitor

ing

tank

circuit

"locks"

half

The

of

the

at

the

in

appear

the

output

phaselock

operating

phase

the

divider

and

the

comparator

the
"free-running"
sensing
an
The
trolled
To
frequency

B-910
circuit.
ruption

~ircuitry

external

exC

aural

iter

pending

further

insure

deviation

incorporates

The

of PA

center

B-910

at a frequency
the

center

frequency.

and

8.8

to

the

specified

FM

broadcast

is

compared

range

of a temperature-controlled

the

operating

in

the

modulated

a

circuitry

of

oscillator

frequency

loop

wi

and

circuitry,

modu I

condition.

in

the

alarm,

frequency

circuit

aga

limits
an

is

collector

more

is

doubled

level.

This

divided

10.8

ki

operating

spectrum).
with a frequency

generated

dperati

8.8

to

oscillator,

are

fed to a

converter.

correction

in

the

modulated

frequency

.

II

respond

reference

inputs.

the

control

ated

osc

When

B-910

indicating

repair.

in

st

operati

established

additional

automatically

voltage

than

100 k i

and

ampilfied

operating

by

10,000

10Hertz

range

frequency

by

dividing

ng in

the

frequency)

10.8

KHz

phase

The

DC

voltage

the

frequency

oscillator.

precisely

only

to

frequencies

If

malfunctions

voltage

ill

ator

wi

this

occurs,

may be

loss

can

be

ng

beyond

by

channel

disabled

if

the

unit

loHertz

frequency

to

produce

(one

This

by

8.8
range.
range,

the

other

comparator

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Hertz

the

main
This

to

return

100

MHz

the

of

100)

at a 1.0

the

cir-

up

to

error

of

to

:

'
l
l
l

.

OSC

fo-900kHz

FIG.7

11

/ 73

Q4

2

BLOCK

FUNCTIONAL

DIAGRAM

ALARM

8.

CONTROL

MODULE

-7-

alert

the

operator

the

unit

if a

occurs.
The

output

in

the

reference

low

pass

filter,

kHz

components
parator
quency,

of

wave
a DC

switches
co
LED
at
strip
operate
a
shou
exciter
trol

DC
sensitive
lock.

in
the
absence
be
represents a division
tor

produces

pass

condition
at
ate

duce

backup

operation.

Fig.

cy

and

which

the

phase

output

voltage

Q-2

Ilector

loss

current

lock

1.0A,

28

of

the
an

of

phase

I d

be
relay

permitting

amplifier,

Loss

an

ouf-of-tolerance

center

frequency

of

made

manually.

of

1000

a 1 Hz

filter.

of

the

carrier

on

frequencies

submultiples

system

7. A crystal

of

carrier

indicator

to

to

frequency

of

thE:

generator

FLI.

produced

passes

would

lock

of

the

which

on

and
de-energ i zes

VDC),

exciter.

external

lock.

operated

contact

adjustment

Q-l,

insure

of

phase

phaselock

times. A carrier

signal

The

detector

7500 x 1000

frequency.

is

Refer

to

oscillator,

frequency -900

2

The

with

lated
lated

oscillator

an

oscillator

oscillator

output

operating

module.

module

loss

of

deviation

100

kHz

This

only

be

present

condition.

fi

Iter

is

turns

off

Q-3

"off".

appear

This

visual

Alarm

by a

closure.

Q-2, Q-3,

early

lock

operating

should

and

The

100

of

the

at

the

Since

which

suitable

employed

the

Alarm

frequency

frequency

The

is

phase

in

phase

module

filter

by

the

the

low

The
detected
transistor

off.

When

re

lay

The

contacts

on

the

termination

or

aural

loads

in

slave

re

R-5

of

the

threshold

to a point

detection

does

riot

be

closely

frequenty

kHz

comparison
carrier
frequency

output

responds

or

an

error

it

when

divided

for

phase

to

prevent

Module

Q-4,

operates

kHz.

is

signal

RF

amplified

lock

and

to

excess

comparatOr,
is

eliminates

100

frequency

in

low

Q-3

rear

excess

lay

is a sensitivity

necessarily

frequency,

corrections

frequency

of

to

is

doubled,

fed

input

by

of

fed

to a 7.5

kHz

phase

the

event

freq

uancy

and

converted

Q-l.

Thisaction

is

turned

K-l

and

turn s the

of

K-l

terminal
may

be

alarm,

indicating

of

actuated

condition

sufficiently

of

loss

However,

monitored

frequency

by a

error

of

the

7,5

a loS!!

of

up

to

possible

by

10,000

lock, a second

off-frequency

Block

at a frequen-

then

from

the

from

the

the

field

disable

100

kHz

located

kHz

any

100

com-

slip

fre-

of

loss

sine

to

oH,

(rated

barrier

used

to

25

watts

by

the

con-

of

of

phase
result

in

the

should

fac-

1000

Hz

kHz low

of

lock

7.5

MHz

to

oper-

pro-

Diagram,

mixed
modu­modu-

effect

transistor,

intermediate

Q-7.

ter

provides a 900

detector,

shift

frequency

IF),

the

ficiently

is

turned

rent

of
contacts
The

normally

supply
relay
mounted
module
or

maintenance.

RF

Power

See

Figure 8 and

The

two-stage

imately
lator
pically
properly
The

the

drive

work

of

Q-l

output

push-on

module.

provide a relative

total

.47

ohm

this

DC

meter

The

RF

of

approximately 2 to

level

on/standby
of

the
from
abling

voltage

Q-5,

Q-7

drives a 900

D-6,

by

100

100

voltage

to

off

Q-l0

appearing

voltage

contact

On

the

is

removed

Amplifier

0.25

module

will

matched

RF

input

control,

comprised

matches
stage.

coaxial

RF

collector

resistor,

resistor

switch

output

from

switch

RF

module.

the

equipment

the

for

the

frequency

kHz

kHz

allow

and

en

closed

closure

R F

watt

to a rated

deliver

The

output

current

is

the

complete

and

fed

kHz

D-7.

If

or

more

removed

at

the

Q-8

Q-l0

erg i zes

on

to

the

main

frame,

from

Module

schematic

power

output

up

50

ohm

to

the

R-l

of

Cl,

the

input

RF

output

is

power

R4.

fed

to

is

in

power

modulated

SW-l

Thi s permits

following

RF

power

to

mixer,

output

kHz

the

filter

to

is

re

connector

contacts, 8 and

power

is

the

ampl i fi

to

first
and

C2

output

sampled

of Q-l

The

the

the

is

15

exciter.

of

band

IF

output

operating

(resulting

from

output

turn

on.

turned

lay

K-2

amplifier

by-passed

which

mounting

diagram

er i ncrea

level

of

10

watts

15

watts

load.

stage,

an

impedance

and

ll.

impedance

from

connector

by

output

and

voltage

front

Ipa

pOsition.

adjustable
watts

by

oscillator

is

provided

the

The

amplifier

Q-6

pass

signal

the

If

on.

and

terminals 8 and

operates

the

output

output

Q-l,

The

at

diodes

level

Q-2

penel

by

varying

removal

exciter

Q-6.

The

is

amplified

filter.

to

frequency

in a

mixer

norma I

wi

II

decrease

Q-8

turns

The

collector

opens

10,

connect

module.

by a

microswitch,

if

frame

for

Dwg.

::t

ses

th

modulated

level,

power

is

fed

matching

output

of

Q-2,

Q-2

appears

the

rear

Dl

indication.

passes

developed

meter

Rl

over a range

the

module.

on

the

front

of

without

+ 24V DC

can

be

900

kHz

The

fil-

the

diode

should

output

900

kHz,

suf-

on,

Q-9

cur-

the

re

lay

10.
DC

This

the

alarm

service

552073/1.

e a

pprox-

oscil-

and

ty-

into

through

net­circuitry
the

final

at

of

the

and

D2

The

through

across

when

the

RF

input

An

RF

panel

RF

power

dis-

supply

interrupted

by

a

a

to

a

R F

I N

A PR

1 4 W

PUT

OX

AMP

-8-

RF

Q 1

FIG. B BLOCK

RF

AMP

Q2

FUNCTIONAL

DIAGRAM

RF

POWER

AMPLIFIER

RF

REFERENCE

l-lSW

RF

OUTPUT

OUTPUT

11/73

at

several

the

Main

1)

The

2)

Channel-loss

control

3)

Main
alarm

4)

Standby

ule.
CAUTION:
operate
load,
amplifier
voltage
VSWR

2)
Amplifier
connectors.
pa
respective
tors
then
nectors

Power

See
The
DC
corporated
supply
A-5
divider,
+15
RF
is

Transistors
with
of D-1,
ohm
ficientto

under

good

represents

Use

extreme

ne I of

the

mounting

retighten

to

Supply

Figure 9 and

power

supply

for

.2

volt

volt

power

supplied

an

overload
D-2,

series

points

Functional

be

standing

Module

mounting

the

supply

IC-1,

supply

amplifier. Power

allow

in

the

Block

rear

term

ina

module;

frame-mounted

module

1)

engineering

operated

If

exc

Regulator

supply

voltages.

in

all

from a

Q-1

and

resi

is

switch

Although

normal

wave

a

transmission

care

to avoid

mi

sa I ignment

iter

and

bracket
hardware.
the

hardware

frame

.

schematic

regulator

the

module. These

logic

feeds

of

the

powers

+24 volt

and

Q-2

current

D-3.

stor,

R-11

current

exciter

I s

TB-2, 1 and

relay

removed);

on

the

the

conditions

practice

with a suitable

ratio

in

inserting

rea

Carefully

Module

Four

devices

the

modulated

all

act

protection

Current

develops a voltage

atthe

system,

Diagram.

contacts

microswitch (actuated

RF

power

RF

power

without a 50

dictates

of

less

efficiency

or

damage

I i gn

separate

high

source

to

occur

s,

the

by

loosening

securing

diagram

provides

and

phase

speed

oscillator

other

modules

to

the

RF

.

as a Darlington

drawn

bose

of

as

shown

2;

on

the

alarm

amplifier

amplifier

ohm

that

the

RF

load

with

than

2: 1.

of 89%;
removing
the

remove

con

nector

insert

the

(Dwg.:;552074/l)

all

regulators

include

100

power

ci

rcuit,
through

Q-1

the

push-on

the

s on

the

connec-

the

module,

coaxial

the

required

ore

a +5

comparators.

MHz

decade

module

except

amplifier

regulato

consi

the 0.27

drop

to

be

drained

on

and

when

Mod-

can

RF

RF

This

RF

coax

rear

the

con-

in-

volt

. A

the

sting

suf

from

the
Darlington
The

two

with

the

5 .6

ence

voltage

loss

of

Q-1,

5V, ± 10%,
meter.
exciter

a

and

urement

a

The
regulators,

with

the

The

i r

to

tively
be

i
metal
i

.

Q-7

the +24
on

main

voltage
at
requirements

F1,
regulator

occurs

power

r

former
Main
transformer

­nection

The

should

discrepancy

the

specified

of

operation

the

schematic

+

15

that

used

high

measured

stor

Q-6,

chass

nsulated

and

Q-8

the

externa I heat

chassis.

from

approximately 1.25A,

is

provided

in

module

with

Block

wiring.

base

through

combination

forward

volt

sufficiently

Q-2

as

measured

DC

meter
be

between

the

actual

of

is

simi

exception

diagram

volt

supply

in

the

current

with

an N

PN

is

of

from

the

operate

volt

supply. These

Q-7

Z-l.

of

the

to

protect

the

regulator

are

three

Functional

connections

~o@l](Q)I·

the

load,

thus

biased

zener

.

The

provided

used

+5

volts,

voltage

the -5.2
lar

in

of

uses

+5V

supply.

all

modules

powe r devi

the

chass

as

si nk

and

The

24

well

RF

between

the

supplied

separate

Q-1,

Q-2

from

diodes,

diode,

to
DC
with a high

as a reference.

the

operation

the

for

supply.

power

is

with a mica

Darl

Q-8

volt

power

the

power

section. All

secondary

Diagram

and

D6

Z-3,

overcome

output

on

the

front

panel

verify

the

at

the

volt

supply,

to

current

nominal

regulator

This

The

output

properly

ce,

supply

ington

transistors

located

receive a base

supply

above

the

amplifier. A 1.5A

rectifier

transformer

by a

common

for

power

preventing

being

turned

and

D7

increase

the

DC

voltage

quality

front

ponel

In

the

meter

reading

modules

the

shutdown.

is

pass

on

is

the

.

with

+ 5

volt

voltage values.

circuitry

supply

voltage

inserted. Trans-

mounted

regulator

washer

tr'ansi

ore

the

top

current

maxi

mum

diodes

if a fai

voltages

power

winding. See

proper

supply

in

series

the

refer-

voltage

should

DC v

olt-

of

event

reading

by

meas-

Q-3,

Q-4

supply

Refer

similar

is a rela-

should

on

the

and

.

stors
mounted

of

the

reference

limited

current

fuse,

and

the

lure

to

the

trans-

the

power

intercon-

the
on.

be

the

of

to

is

in

IS

r

POWER

TRANSFORMER

11/73

FIG

12 V I A

CT

3SV

1.6A

.9

BLOCK

TO

OVEN

FUNCTIONAL

DIAGRAM

POWER

• •

SUPPLY

TOR E LA

REGULATOR

YS

-9-

Meter

Ampl

ifier

and

See

Figure
The
panel,
modulation

VU

cover

Q-1

lower,Q-2.Q-3functions
Rectification
circuit
follower
ter

resistor.
amount
compensate
plied
adjustable

The

·.'of

the

to a zero

Model

The
od

of
advantage
and
stal

ly

coupled

ter

follower.
plifier,
square
changes
voltage

si~nal

provides a dual
by

four
provides
degrees
sq

uare

operate

10

and

meter

amplifier,

is

used

to

signals

meter.

stereo

excellent

oscillator,

This

plate.

provides

of

of

to

input

amplifier

B-1l2Stereo

generating a stereo

drives

to

wave

of

Q-3.

with

the
Since

DC

for thi s

the

opposite

1 K

calibrate

VU

reading

generator

of

this
stereo

to

Q-7,

The

Q-8.

Q-8

wave

from

at a 76

switching

19

kHz for

two

38

out

of

voltages

as

high

ampl

flows

ohm,

operates

output.

the

Switching

schematic

located

amplify

sufficiently

is

ification

the

The

meter

so

Generator

method

a

output

is

kHz

function.

kHz

phase.

impedance

the

accessible

as

DC

signal

transistor

connected

the

meter

through

voltage, a reverse

side

zero

adjust

control,
that

100%

on

the

module

composite

separation.

at

buffer

stage,

of

heavily

The

full

supply

rate.

integrated

It

pilot

carrier

signals

The

drive

diagram

to

aDC

the

of

R-1,

meter.

Module

utilizes a switching

is

simplicity

76 kHz.

Q-7

collector

Thi s square

divides

two 38 kHz

Q-1

shun!

(Dwg. #551049/1).

behind

various

to

by

drive

takes

operates

is DC

the

modulation

overdriven,

voltage

which

the

audio

drive

the

removal

the

meter

drive

place

as

to a tap

coupled, a small

meter

to

voltage

meter

potentiometer,

sets

the

(Dwg. '0'559048/1)

signal.

of

Transistor

Its

output

operating

drives a shaping

voltage

value

wave

circuit,

the

76 kHz

output

and

are

Q-2.

ing

and

precisely

switches.

on

overall

corresponds

resulting

out-of-phase

Q-1

front

meter

frequency

front

panel

of

the

emitter

amplifier.

in

the

base

an

emitter

the

emit-

ground.

is

through

R-14.

meth-

The

prime

adjustment

Q-6,

a

is

loose-

as

an

emit-

of
to

76

IC-1. IC-1

signal

secondly,

and

They

top

fol-

To
ap­the

gain

cry-

am-

Q-8

zero

kHz

180

Q-2

alternately
signal
When Q-1
in

and

composite
val,
13-14
in
the
setting
bration
bined
from
sine
plus

nal

to
range

to

lower,
modulator.

function
and
The
the
modu
pilot

in

panel

The
panel
mode.
at
adjusted

Q-5

cillator
by a

switch

coming

is

turned

its

"on"

state,

10

is

shunted
amplifier,

Q-2

is

turned

can

reach

the

collector

attenuation

of

these

and

Operation

signal

terminals

wave

derived

many

harmonics

switching

located
is

properly

produce a constant

Q-4,

out

of

providing

process

of

Q-3

on

the

a

simple

the

matched

fi

A front

justs

the

phase

insures

the

transmitted

amp

I i

tude

level

of

the

lation

would

carrier.

pi

19 kHz

switch,

terminals

to

relay

lot ampl

In

monaural

in

feed

module.

located

This

pi

9-10
level

the

out a segment

from

the
on, Q-2

the

to

Q-3.

off

Q-3.

250

leads

of

the

controls

in

Q-3

13-14;

from IC-1

of

Q-1

is

filtered

lower

top
by

Iter.

The

gain

a low

panel

of

the

proper

38

of

the
composite
include

amplitude

itude

control,

lot

carrier

SW-1,

placing

operation,

and

and

monaural

The

above

on

input

is

input

ground,

During

and

an

ohm

of

Q-1

two

transistor

wi

II
section
consi

sts

the

19 kHz

generated

and
by a 53

cover

the

group

output

stage,

impedance

pilot

transmitted

timing

kHz

switched

pi

lot

is

10%

may be di

13-14

connected

signal

switching

the

module

of

terminal s of

turned
signal
hence

input

controls,

and

be

of

through

Q-2.

input
delay

of

and

phase

of

signal.

injection

is

R-47.

the

the

are

from

cannot

the

signal

Q-2,

switches.

covered

the

manual.

of

the

pi

lot

in

the

The

kHz

of

the

and

over

the

fi

Q-5,

output

control,

19

the

transmitted

composite

norma

Ily

Thus

established

sabled

system

audio

resi

stively

directly

to

the

itself.

the

audio
the

off.

When Q- 1

terminals

reach

same

time

on

terminals

R-11

and

serve

to

in

the

The
chopped
which

a 19 kHz

square

composite

low

pass

unit.

This

output

the

frequency

Iter

is

connected

an

emitter

to

drive

kHz

pilot.

set

at

100%

of

the

by a front

by a front

in a

monaural

input

combined,

to

modulated

is

accomplished

The

relay

input

module.

inter-

R-12,

balance

Correct

Cal

com-

signal

is

now a

fi

Iter;

wave

filter,

filter

ci rcu i

R46,

This

pi
signal.
1I10th

total

19 kHz

signals

Q-4

is

9

the

i-

sig-

ts

fol-

the
ad-

lot

and

os-

can

COMPOSITE

IN

J

1

1

ST

f

IN

PU

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a I

GAIN

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J

l

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02

EMITTER

FOLLOWER

FIG

10

BLOC·K

FUNCTIONAL

03

OETECTOR

AND

METER

DRIVER

DIAGRAM

METER

~r---7lH

~L....LJ

AMPLIFIER

D.C

ZERO

TO

METER

11/73

be

controlled

by

an

externally

minals

in
stereo

Model

The
able
kHz.
tions
quency
of R-16,
the
the

signal

is

put

R-3,
modulation

Q-1

lower
to
pre-emphasized
gain

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frequency
ter
consisting
resistor

ing
of
beIng
wave
sisting
form.

filter,

isolation.

potentiometer
tion

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and
of

vides
age.
tified
ronic
voltage

combination
circuit.

istor

indicating

Thet
and

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the

mono

modes.

8-113

SCA

Generator

on

two

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transistor

as

the

is

primari

R-20,

pos

ition

front

panel

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also

frequency

of

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which

acts

and

Q-2,

to

provide

properly

output

follower

circuit.

emitter

level.
emitter

adjusts

Q-7.

regulated

modulate

of

Q-1

of

modulated

Q-4,

of

diode

follower
transmitted. FL-2
harmonics

only

To

prevent

Q-S,

an

The

Q-7

40dB

The

limiter

DC

output

mute

switch,

is

bled

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Q-8

on,

lamp

35-40

volt

11173

by

the

front

connected

8.

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position

SCA

standard

free-running

of

bandwidth

level

for

Generator

(Module

frequencies,

Q-3

Iy

determined

C-S,

C-8

R-10,

the

fine

adjustment. The

applied

connected

both

serve

to

limited

as a load

control. The

as

the

necessary

remote

(a

and

coar

the

an

Q-3.

frequency

as

the

modulation

Q-3

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signal

through

R-21, R-22, R-23,

switch

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67 or

and

of a

frequency

emitter

output

R-29

of

Q-2

the

modulation

functions

of

limiting

output
voltage

off

which

presence

allowing

mounted

unregulated

by

trans i stor Q -6.

a DC

is

used

41

kHz sq

Q-4

must

eliminates

produces a clean

undesirable

follower

level

to

vary

is

connected

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to

voltage

is

R-21,

R-23,

to

ground

functions

of

the

current

external

panel
switch

front

panel

selection

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position 2 or

matched

master

by

the

se

adj

bases

by

filter

to

a 1 K ohm

to

the

following

ampl

ifier

level

C-2

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response

frequency

kHz or

which

voltage

to

provide a silent

uare

be

filtered

modulated

loading

provides

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Q-S

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SCA

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voltage

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sampled

is

used

to

D-6,

through

as

a var

mute

to

flow

source

switch,

closure

control

of

It

559049/1)

either

41

silicon

oscillator.

the

time

voltage

ustment,

audio

of

Q-3.

FL-1,

potentiometer,

fi

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and

and

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by

increasing

is

67

kHz

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coupled

controlled

and

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wave

by

the

unwanted

subcarrier

sinusoidal

of

the

the

is

controlled

sub

level

ampl

ifier.

modulating

rectified.

turn

on

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D-7.

the

iable

voltage

through

to

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voltage

or

remotely

across

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3)

is

avai

kHz or

pair)

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constant

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ied by

and

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modulating

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audio

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and

as

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square

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signal

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low

necessary

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wave

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wave-

Q-7

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the

elect-

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R-44, C-21
mute

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the

module.

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be

67

fre-

out-

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the

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out

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pass

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R-9,

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rec-

mute

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Amplifier
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switching
to

insure

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Rotate
this

position,

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is

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turn

on
100%. Within
modulated

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ence
matically
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LED

few

seconds

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50

the

modulated

to

the

the

control

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not

control.

the

reference

vern

ier

or

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the

vernier
other
rotation
the

control

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a

few

tion

for 100%

Setting

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attempt

made

in

operation
temperature.
temperature
control
adjust

monitor

frequency

Adjusting

With a
output

on

the

PA

module

Connect

power

to

proper

Phaselock

the

meter

connected

resistor,

observing

the

exc

osci

oscillation

of

the

AC sl ip freq

attained,

indicator

MHz

vernier

left,

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negatively,

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Check

frequency

unit

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frequency

until

lock

of

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to

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hours

of

the

Station

to

unti I the

on

the

the

freq

or

to

measuring

the

properly

of

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~°®lJ(Q)I·

V.

OPERATION

Exciter

drive

in

AC

power

ohm load

switch.

the

tSV,

operation

switch

the

output

to

the

R-14A.

the

iter.

15

seconds,

Ilator

of

the

the

on

later.

To

freq

oscillator

to

the

the

to

be

generator

control

extremely

is

attained

control.

position

if a

operation,

reading.

Frequency

adjust

system

long

enough

Allow

to

stabi

reference

uency

concur

RF

Output

matched

B-910

FM

control

its

Turn

The

approaches

the

meter

certain

30

I i

to a properly

service.

located

extreme

to

Check

-SV, t lSV,

to
of

meter

phase

meter

uency

quivering

verify

uency

right.

then

is in

cold,

control

After

the

loss

the

is

minutes

ze.

with

exciter,

counterclockwise

to

terminals

the

exciter

DC

of

the

phase

the

10

through a 4.7 K calibra-

the

exciter

lock

meter

shou

the

meter

needle

signal.

alarm

module

pro,Per

control

module

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positively.

wi

II

not

the

the

ha s

been

cantinue

from

and

lock

meter

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recheck

station

phase

to

reach

The

fron t

osci

lIator

measurements

50

ohm

flip

on

the

TB-1, 1 and
RF

meter

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the

power

lock

kHz

phase

off

meter.

Id

come

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the

lock

is

due

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wi

II

stop

wi"

phase

R-30

front

panel)

meter

should

follow

phase

lock

lock

pasition.

improper

to

one

extreme

the

meter

is

attained,

at

100%.

power

the

phase

frequency

locked,

for

load

and

normal

the

pane I frequency

module

calibrated

connected

the

RF

RF

Power

output
readings

positions
suppl

position.

compara-

momentarily

Once

again,

up

to

quiver

If

slowly

freq

to

the

lock

abruptly

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lock,

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phase

the

switch

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follows

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occurs.

lock

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crystal

is

frequency

taken

on/

as

uency.

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slowly

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vernier

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used

to

standby

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jack.

by

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on

lock

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the

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switch

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Adjust
ing

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corresponding
the
trol

shou
Normally
approximately

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meter
per
wattmeter
adjust
output

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cond

Connect a 400
terminals

signal

mately + 10dbm.

located
position.
desired

FCC
position
tion

semi-peak
100%
When
must

100%
respond

perienced

located

"on"

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the

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meter

RF

output

until

the

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the

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and

output

the

power,

current.

ition

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level

on

percentage

type-approved

the

and

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feeding

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modulation

to

po

sit

PA

meter

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desired

fina I current

an

RF

position

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only

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in

series

PA

or

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for

the

Audio

located

feeding

the

Adjust

front

adjust

reading

complex

intermittent

wi

th norma I

on

the

i on .

drive

control

position.

ampere

to

lA.

As

wi

II

increase.

RF

output

600-900

scales

used

obtained,

with

tune-loading

adjust

procedure

power

ampl

Hertz

audio

on

the

the

Position

front

of

the

the

audio

of

modulalion

panel

the

level

device

with a sine

wave

to

maintain

point

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program

RF

Power

meter
the

o~tput

read

of

10

milliamperes

the

as a reference.

either

the

the

loading

rear

exciter

the

module

level

modulation

meter

accordingly.

and

program

modulation

peaks

clockwise

in thi s

PA

Advance

is

achieved.

i n9

watts

meter

connect

output

controls

wi

II

ifier

output

source

of

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flat

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to the.

monitor.

switch

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calibrated

wave

of

short

materi

Ampl

drive

exceed

is

to a 0-28

coaxial I ine
for maximum RF

control

result

to

the

exciter.

should

to

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os

in

audio

material,

peaks

a

I.

ifier

Modu

while

monitor-

position,

is

increased,

the

drive

In

no

1

ampere.

achieved

of

PA

Current.

volt

After

the

an

in-line

for minimum

in a

resonant

network.

proper

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be

approxi-

pre-emphasi

exciter

indicated

Alternatively,

the

audio

The

meter

to

display

input

allowance

below

meter

duration,

Ie to

100%

con-

case

with

DC

pro-

RF

and

input

audio

switch

for

the

on an

posi-

is

signal.

the

cannol

as

ex-

REFERENCE

Osci

lIator)

Place

extender

1.

Turn
tion.
Adjust

2.
lator

Pos

3.
front

Connect

4.

Q-3

FCC

should

If

the
tate
direction

sired
range

frequency

5.

Adjust

(lOOK)

REFERENCE

age

1.

Connect

ing

2.

With
form
MHz
Just
be

If

shown
R-19,
ramp
is
normally

Converter)

similar

the

s

a

VI.

CALIBRATION

GENERATOR

the

reference

card.

meter

switch

inductor

voltage.

iti

on

the

frequency

of

the

module

a

frequency

or

observe

type-approved

be

within

frequency

the

slug

to

bring

frequency.

wi th

the

correction.

the

Reference

for a 100% '

GENERATOR

an

osc i II

capacitor,

the

system

across
oscillator
prior

amplitude

eliminated,

the

to

phase

to

Fig.

observed

in

Fig.

slightly

will

generator

to

L-l

to

the

frequency

frequency

1 kHz

deviation

in

inductor

the

This

front

oscope

C-14.

in

capacitor.

vernier

11

wave

12,

in

until

as

phase

operate

PROCEDURES

MODULE

module

the

Reference

for maximum

ad j ustment

its

mid-position.

counter

mon

of

the

is

greater

L-l

frequency

will

insure

contro

I,

Oscillator

ading

on

MODULE

to

the

phase

lock

below.

adjust
the

theglitch

lock,

until

loss,

form

the

direction

lock

in

its

Slowly

the

is

full

(

Oscillator

reference

to

the

of

the

itor.

desired

in

closer

sufficient

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perm it

calibration

the

front

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.005

tanta I um

observe

advance

system

the

wave

more

ramp

voltage

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on

the

is

lost.

clockwise

Reference

on

the

module

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control

exc

The

than 1 kHz;

the

similar

leading

on

collector

iter

with

frequency

frequency.

appropriate

to

the

tuning

long-term

pot

panel

meter.

to

charg-

the

the

loses

form

should

to

control,

lowers

edges

This

control

position.

posi-

the

of

an

ro-

de-

R-l

Volt-

wave

50

lock,

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the

0

Stereo

Audio

Conr.Ject
channel

Adjust

-1

Operation

suitable

terminals

left

input,

the

Pi

lot

Level

Remove

justed
of
pi
erator

the

FCC

measuring

lot

level,

modu Ie for 8-10%.

?-

sources

on

TB-3, 5 and

levels

as

described

audio

from

type-approved

the

19

located

on

of

the

6;

the

kHz

the

audio

rear

af

right

input,

in

exciter.
modulation

pilot

front

panel

to

the

left-

the

B-910

TB-3, 7 and

the

monaural

With a

monitor

injection,

of

the

and

exciter;

section.

properly

capable

adjust

stereo

right-

ad-

the

gen-

8.

----J

FIG.

11

L-I--'

FIG.

'--

12

11/73

MODULATED

Place

the

card.

1.

Turn

generator

2.

Position

mid-position.

3.

Position

4.

Connect a suitable
the

RF

required

to

prevent

5.

Position

near

6.

Connect a 100
to

the

7.

Slowly
the

phase

the

coil

the

beat.

dication

8.

Flip
snap

the

LED

should

9.

Observe
the

doubler

10.

Adjust

L-l1,

these

11.

Observe

quency

sired

12.

Remove

watt

13.

Adjust

for maximum

should
res i sti

MONAURAL AUDIO

1.

Connect

internal

put
quency
the

output

2.

Adjust

3.

Set

an

4.

Vary

recording

sary

tenuation

dard

in

section

A

reproduction

is

included

OSCILLATOR

modulated

phase

their

the

to a

carrier

non-inductive

termi

the

to

75

lock

modu Ie).

the

vernier

meter

output

between

damage

all

coil

mid-position.

RF

output

adjust

lock

slug

Set

as

possible.

phase

steady

lock

come

on

the

coil,

the

three

and

L-14,

inductances

the

mon i tor.

operating

the

counter

the

series

be

between 3 and 5 volts

ve

load.

an

accurate

or

external

no

I s

response

terminals.

the

input

output

input

the

maintain a constant

settings

mi

crosecond

73.3330f

following

osci

switch

frequency

switch

100

jack

(J-l).

the

to

the

slugs

MHz

jack.

the

oscillator

meter

for a low

very

slowly

the

slug

lock

position

indicator

after a few

output

frequency

output.

level

attenuation

voltage

L-6,

remaining

for max i

wi

II

The

and
resi
output

MODULE

col

and

on

over

level

reference.

frequency

should

the

of

the

MODULE

lIator

module

off

(located

control,

in

phase

lock

MHz

frequency

CAUTION: A pad

exciter

oscilloscope

as

switch

for maximum 100

be

frequency

frequency.

stor.

The

signal

a

at

pre-empha

this

latter

(L-2,

as

close

indicating

on

the

seconds.

of

sluga

mum

extremely

on

the

repl

ace

coupling

final

ibrated

output

SO

to

250

between

of

the
output

follow

FCC

Rules

standard

section.

output

unit.

L-6,

L-8,

Or

coil,

frequency

it

is

possible

to

the

on.

The

alarm/control

the

in

Olltput.

counter

shou

wi

capacitor,

RF

across

generator

attenuator

vol

tmeter

15,000

Hz

to + 10

50

input

voltage.

closely

sis

and

pre-emphasi s curve

on

the

extender

on

reference

R-30,

in

its

position.

counter

and

the

L-ll,

RF

voltmeter

L-2,

and

beat.

zero

meter

phase

module.

MHz

inductor~

The

tun

broad.

or

Id

be

th a

47

voltage

the

with

to

of

Hz

range,

dBm.

and

15,000

signal

the

curve

as

Regulations.

may be
counter

L-14)

watch

Turn

to

miss

beat

.hould

lock

module

Adjust

dUtpUt.

L-8,

ing

the

the

ohm, 1-

C-37,

output

47

either

the

flat

neces-

The

stan-

shown

to

in-

and

of

fre-

de-

ohm

in-

fre-

to

Hz,

at-

5.

If

the

measured
scribed
slightly
capacitor,

switch,

6. Do
filter.
adjusted
ductor

justment.

ALARM AND
Connect
card.
module.

per

frequency

Fc(MHz} =

Oscillator

1.

Connect a voltmeter

point
bler

2.

Adjust

imum
direction
age
mately

This
the

Doubler

1. Adj
in
point.
The
volts

R F Coi I

1.

Connect
istor,

mediate

maximum
peak-to-peak.

Off

Frequency

1.

Temporarily
socket.
the
insert
(relay

curve,

by

SW-l.

not

alter

This

at

sore

the

alarm

Check

for

Use

the

fo+900kHz

Adjustments

TP-l,

coi

Is,

the

voltage

to

reoding.

10·15%

will

unit

is

Adjustment

ust

the

the

output

Set

final

DC.

Ad i ustment

an

Q-6,

frequency.

900

Adjust

point

the

de-energizes.)

varying
C-6,

the
epoxi

CONTROL

of

L-3

slug

insure

turned

doubler

the

voltage

(the

where

crystal.

~o@IJ(Q)I·

response

the

the

in

the

adjustment

is

an

extremely

factory.

ed

and
proper
formula
the

crystal.

:2

located

and

L-2.

in

the

at

the

increase

Adjust

below

reliable

on.

voltage

slug

reading

oscilloscope

mixer),

kHz

output,

Detector

remove

the

the

K-2

does

pre-emphasis

value

of

series

in

control

frequency

with

between

test

the

the

coi

for

Adjust

Threshold

K-2

coil

with

of

stable

The

tuning

place

MODULE

module

below

for

or

a 5

theoscillator

oscillator

point.

inductance

slug

maximum

crystal

I,

L-2, for a

observed

the

exact

will

to

the

Observe

the

which

the

crystal,

threshold

of K-2

contacts

not

follow

may

the

nominal

the

pre-emphasis

the

15

kHz

filter,

slugs

after

fi

na I

to

the

crystal

determining

Fc(MHz} =

volt

range

coil,

L-3,

Rotate

for a

be

the

for maximum

reading

voltage

starting

noticeable

at

the

minimum

between 1 and

collector

the

900

RF

coi

is

typically 2 volts,

Xtal-1,

control,

just

energizes.

should

the

be

low

precisely

in

factory

extender

in

the

fo-900

to

the

and

for

slug

approxi-

obtained.

whenever

above

reading.

of

kHz

I,

L-1,

from
R-33,

then

pre-

altered

1500

pass

the

in-

ad-

alarm

the

pro-

kHz

2

test

dou-

max-

in a

volt-

dip

test

trans-

inter-

for

Re-

reopen,

pf

2

its

to

11173

-13-

Phase

1.

2.

3.

RF

modu
the
Ampl

2.

3.

5.

Lock

Turn

the

tate

the

oscillator
position.
Adjust
relay

Turn

just

trol for
relay

Remove

1.

Connect a cal

Connect a high
output

meter,

waveform
harmonics
Switch

,' ing of

4.

Sw

correct

front

6.

7. An R F

eres

8.

for

9.

50

the
K-1
the

the

phase

K-1

POWER

the

Ie,

remove

Alarm

and

ifier

.

jack

(J-l)

Jack,

C-14

for a maximum

and

to

ascertain

the

between

indicated.

itch

the

tween

22

p,eat

step

Return

milliamperes
reading
Observe
wattmeter

with a total

Adjust
si
recommended

Switch
adjust
a
reading
and
brated

power

the

paMI

output

.

the

red

RF

which a B-910

the
the

100%

is

not a precise

RF

ohm load

readings

Loss

Threshold

phase

lock

vern i er

modulated

AMPLIFIER

Ipa

is

read

is

frequency

module

loss

is

phase

should

RF

Control

on

simultaneously

as

and

DC

DC

and

between 8 and

the

and

output

wattmeter

to

of

lock

de-energized.

lock

lock.

energizes.

Power

the

Reference

ibrated

the

rear
frequency

adjust

atthe

same

displayed

spurious

Meter

600

Meter

24

volts

and

Epa

2 unti I

DC

Meter

RF

Drive

is

indicated.

indication

adjust

power of

lpo

current

front

panel

power

required

is

DC

Meter swit"ch

RF

Sample

i ng

on

relative.

should

are

switch

switch

osci

After

module

C-1, C-2, C-7,

and

sw

correct

being

the

It

terminated

be

to

to

control

the

extreme

threshold

to

Ilator

ver,nier

approximately 3 seconds,

MODULE

Amplifier

Osc i Ilator

to

gain

RF

wattmeter

of

the

exciter.

osci

signal

function

readings

control

indication

as

observe

time

that

shows

signals.

900

millamperes

itch

to I pa, a read i ng

DC

should

readings

switch

C-13

be

to

until a reading

The

12

watts.

of

RF

for maximum RF

10

watts

of

less

RF

Drive

(10

watts

RF

drive

used

to
Calibration
meter,

is a sampling

used

whenever

made.

the

off

position.

on

the

modu I

counterclockwise

control,

its

on

cover,

access

to

Iloscope

shown

the

the

the

minimal

switch

be

are

not

Epa

RF

output

shou

than

control

for a

for

as

an

the

The

of

RF

with a non-inductive

R-5,

position

freq

uency

reinsert

modu I e

to

the

RF

to

the

C-8, C-13,

on the

osci

Iloscope

sinusoidal

amount

to Ipa, a

should

indicated.
obtained,

are

obtained.)

and

adjust

output

power on

I d

be

obtai

900

milliamp-

for

B-910T

the

transmitter

exciter).

RF

position

control,

R F

output

of

RF

power. A cali-

absolute

the

output

of be-

of

ot

output.

the

or

R-6 for

voltage

Ro-

ated

until

. Ad-

con-

the

and

RF

RF 5.

and

watt-

RF 6.

of

read-

be

(If

re-

the
800
this

the

ned

de­the

and

meter

RF

are

zener

diode

ments

are

required

NOTE: A 1)12

module

STEREO

1.

2.

3.

4.

7.

8.

9.

GENERATOR

Place
card
Connect
and
B-910.
Locate
minals
Connect

level
adjust

left
total
meter
Switch

19 kHz
e I
pilot
Switch

left­manner
phase
Adjust
Connect
terminals

be
control,
Observe

kHz
stereo
arrow

below

the

provided.

an

pilot

the

located

to

the

the

channel

modulation

of

the

the

pilot

contro I located

injection

the

and

wh

with

the

readi

Iy

R-31).

the

phasing

generator

heads

in

referenced

or

Amp

fuse,

protecting

stereo

frequency

an

composite

stereo

signal

right-channel

i ch

the

level

an

of

connected

Fig.

generator

FCC

Type

left

and

on

the

audio

left-channel

modulation

monitor

stereo

modulation

injection.

on

.

generator

wi

II

left

for 100%

oscilloscope

the

stereo

bow-tie

control,

module,

exactly

13.

and

possible

source

modulation

(L =

horizol1tal

(Fig. '14, i

.
F-1,
the

RF

MODULE

Approved

Monitor

right-channel

rear

apron
of

audio

output

indicated

and

Adjust

the

front

audio

have

the

-R).
total

generator

to

the

waveform

located

no

is

located

Power

module

to

250

level

90% on

monitor.

monitor

the

of

to

100
input

right

modulation.

to

the

arm of

and

on

to

phase

to

ncorrect

calibration

inside

amplifier.

on

the

stereo
the

of

Hz

input

the

module. (This

each other

modulation

output

audio

the

control

by 100%

19

Hz.

composite

adj
the front

input

exciter.

at

a + 1 0 dBm

terminals

for 100%

the

left

to

monitor

kHz

pilot

modu Ie for 10%

Parallel

terminals

channel

the

output

ust

the 19-

the

hori

as

adjustment)

adjust-

of

the-

extender

of

the

ter-

and

on

the

channel

the

lev-

the

in

out-of-

output

can

level

38

of

the
zontal
shown

a

.

POWER

All

REGULATOR

output

DC

voltages

MODULE

from

the

Power Regulator

-14-

Module

FIG.

14

11173

10.

Feed a 400

11.

Adjust

the
amplitude
the

Repeat

12.
connected

just

Select

13.
base
adjust

R-20,

the

composite

base

line

steps 9 and

the

right

an

audio

line

of

the

filter-matching

and

R-24

lines

Hz

signal

oscilloscope

waveform.

switch

to

as

control

as

shown

the

right

channel

frequency

the

composite

for minimum

shown

to

the

to

Adjust
for minimum

in

Fig.

FIG.

15

lOw

channel

amplitude

near

series

in

Fig.

left

channel

properly

15.

ith

the

input

control.

10 kHz.

wave

phase

16.

input.

synchronizeon

the

left

channel

curvature

signa I generator

termi

no

Observe

form.

Alternately

and

shunt

trimmers,

error

and

straight

(Fig.

17,

improper

ls.

17.

in

18.

19.

20.

Ad-21.

the

Front

Remove
compartment
calibration

1.

2.

3. T

4.

5.

6.

sary)

of

±

0 Hz,

with
Connect
minals

in-phase
L = + R.
nel
for
50 -15,000

Repeat
feed
L - R
Measure
should

Position

mono

Adjust

100%

+10

nel

Remove

Place

if

Adjust

meter
Re-insert

modulate
wave
tion
Adjust

100%

of

into

the

measurements.

step

L=

- R

into

be

position.

the

reading

dBm, 1000 Hz

input

Panel

top

adjustments.
all

the

emporar i Iy

used.

the

amplifier

signal

monitor.

the

as

~°®lJ(Q)I·

the

19 kHz

the

the

signa I generator

the

signals

Measure

L - R

Hz

16

signals,

L + R.

the

suppressed

below

the

front

monaural

on

terminals.

Modulation

cover.

directly

input

meter

remove

DC

balance

the

stereo

the

transmitter

as

input

indicated

signal

trimmer,

exciter

to

the

the

channel

Complete

spectrum.

except,

1%.

panel

gain

the main

signal

Meter

The

meter

behind

audio

select

the

card,

for

generator

indi

cated

cal

ibration
on

for

C-11.

to

in a manner

left

and

crosstalk

using

the

connect

and

measure

38

kHz

stereo-mono

trimmer

channel

connected

ampl

the

meter

signals
switch

control,

the

stereo

zero

100%

by a cal

control

front

.

in

reading

with a 1,000

exactly

the

rear

which

the

right

of

the

the

stereo

above

the

the

carrier

switch

control,

monitor with a

totheleft

ifier

located

panel

the

Audio

generator

R-14,

located

on

module

ibrated

R-1 for

panel

meter.

19,000

aud

i 0

will

channels,

L + R

monitor

across

generator
crosstalk

level.

in

R-2, for

in

has

position.

modu Ie,

on

the

meter.

if

used,

Hz

modula-

exactly

Hz,

ter-

feed

chan-

the

to

of

This

the

chan-

the

two

the

and

sine-

FIG.

17

14.

Check
modulation

into
than
and

15.

Recheck

justment
output

16.

Check
ing a
justment

11/73

the

stereo

left

measurements.

35

dB for

15

kHz.

steps 3 and

of

level

the

frequency

control.

audio

monitor

adjustment.

frequency

the

for both

all

pilot

counter

Adjust

separation

Separation

freq

uenci

4.

This

level

of

the

to

the

left

control

19 kHz

the

using

into

should

es

between

will

be

and

pi

lot ampl

frequency

right

the

pilot

the

stereo

and

right

be

greater

50

Hertz

final

ad-

composite

connect-

itude

ad-

(if r'!eces-

B-113

SeA GENERATOR

1.

Position

card.

2.

Connect
and

modu

exciter.

3.

Adjust
actly

67

trol

positioned

4.

Pos i tion

position.

5.

Connect
±2,

dBm,

6.

Adjust

modulation

7.

Adjust
subcarrier

the

SCA

generator

an

FCC

Type

lation

mon

i tor

R-10,

the

coarse

kHz

with

the

front

approximately

thel flat /pre-empha

an

audio

signal

to

the

rear

audio

R-29,

the

Injection

as

indicated

R-3,

the

Modulation

modulation.

module

Approved

to

the

frequency
panel

sis

source

input

Level

on

the

Level

output

fine

in

the

swi

tch

of

terminals

control

SCA

control

on

an

extender

SCA

frequency

of

the

control
frequency

mid-position.

in

the

1000 Hz,

.

for 8-10%

monitor.

for 100%

B-910

for

con-

II

fl

+10,

ex-

at"

-15-

8.

Reduce
the
waveform
peaks
holding

Mute

just

the

the

input

level

at

start

SeA

the

signal

control

output

to

cl ip.

carrier

level

R-9, whi Ie

of

Q-7

This

will

on

and

by

40

unti I

prevent

wi

II

dB

and

observing

the

wave

noise

avoid

unwanted

adjust

the

form

from

dropouts

9.

Remove
delay
mute
iod.

of

the

for

delay

carrier.

audio

input

the

carrier

potentiometer

signal

to

and

squelch.

for

the

observe

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desired

the

R-M,

delay

time

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11/73

VIII.

FCC

STANDARDS

[8)0

®lJ

(Q)I·

BROADCAST

MODULATION
AUDIO

FREQUENCY

REQUIREMENTS

PRE·

EMPHASIS

OJRVE
TOTAL

HARMONIC

DISTORTION

SO%

and

(FCC R &

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

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

.........

111m!.

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

FOR

25%,

.......

......

R,

Section 73.317, Nov., 1972)

...........

...........

..

...

.....

50·100

100·7500

7500

- 15,000

The transmitter should not produce over
maximum

FM

(SO

AM

(SO

CARRIER
DEVIATION.

All

in

distortion figures.

SIN

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

Hz·l5kHz) Modulation

SIN

..........

Hz.15kHz)

FREQUENCY

..

unwanted emissions must

..

......

.. ..

. . . .. . . . . .

..

Greater
Greater

Modulation

....

than

than

......

be

Watts) below the carrier power.

60
50

... . ..

43 + 10

STEREO

± 75

..

50

- 15,000

75

microseconds

.

Hz

Hz

Hz

Y2

of

dB

below

dB below

•..

Log (Power

kHz

=

100%

Hz

3.5%

2.5%

3.0%

the above

100%

FM

100%

AM

±

2000

Hz

STEREO
SUPPRESSION

THAN

SUB

FREQUENCY
MAXIMUM

MODUU

MAXIMUM

(MAIN
STEREO

(FOR
BETWEEN

15,000

Cross talk:
Main

SUB

CARRIER

1%

CARRIER

CHANNEL)

Left

Right into

ALL

Hz)

LESS

MODULATION

RESPONSE ......

L - R

TION ................

L + R

SEPARATION

into

Right... . ...

L.ft . .. ..

FREQUENCIES

50

AND

Main

shall

be

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

tion.

When

monaural

SCA

carrier must

SCA

subcarriets shall
carrier.
shall

If

be

engaged

between

shall not exceed

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

..........

•. . .

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

.. . ..... . .

..

• .

.... . .....

into Subchannel,

greater than

main

channel programming is used, the

be

between 20-74

in

stereo, the

53

10%

40

not

exceed

to

75

kHz.

modulation

......

..

...... ..

.....

.. . . . ..•...

.. . .. ... . . . 29.7 dB minimum

. .

..

..

dB

50 - 15,000

....

...

29.7 dB minimum

or

Subchannel into

below

kHz.

30%

modulation

SCA

carrier frequency

Total

of

of

the

main

1%

= -

40

45%

of

total

45%

of total

90%

modula-

Total

of

subcarriers

carrier.

dB

Hz

all

of

PILOT FREQUENCy
PILOT INJECTION

The majority

...................•....

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

of

the components used are

ctronics jobbers. Those components

SYMBOL
R-7,

8,

10

R-9

C-2,

7,

11
C-5,8
C-l0

Q-l,

2,

3

Q-4

SW·l
T-l
FL·l

19,000

Hz,

..........

8 -

IX.

of

standard

of

unusual tolerances

MODULE

II

1,

PIN DESCRIPTION

540001
540019 3010
670002 3.3
600027
600019 1000

201050 SE-4010 transistor
201056 2N3569 transistor
480004 Single pole, double

910046 600

Hz

10%

PARTS

Crosstalk
shall
for

LIST

± 2

valuesand

or

MONAURAL

of

the

SCA

subcarrier into the

be

greater than

the frequency range

60

of

50

tolerances generally available

of

McMartin

AUDIO

10K

20

Manufacture are listed here.

CARD

ohm,

1%,

metal film

ohm,

1%,

metal

mf,

35V,

10%

tantalum capacitor

mf,

16V,

electrolytic capacitor

mf,

16V,

electrolytic capacitor

throw

ohm

cud

io

transformer

15

kHz

low

pass filter

dB

below

- 15,000

film

100%

resistor

resistor

switch

main

Hz.

from

channel

modulation

local ele.

11/73

-17

-

MODULE

II

1,

STEREO

AUDIO

(OPTIONAL)

SYMBOL

R-7,

8,

BA,

R-9,

28
R-20
R-21
C-2,

8,
C-6,

20
C-14

C-l3,

27

Gl-l,

2,

3,
Q-4,8
SW-l
T-l,

2

FL-l, 2

SYMBOL

R-2,

31

R-4,

5

R-6,

9

R-11,

12,20,24
R-46
R-47

C-3,

4,

C-7

C-11

C-15
C-18
C-20,

22
C-21
SW-l

D-l

RL

Y-l
Q-l,2
Q-3,

4,

6,

Gl-5

IC-l
L-l, 2
Xtal-l
Z-l

26,

12,

16,22,26

5.

5

7,

6,

8

27,

7

28A

MODULE

PiN
540001
540019
400059
400041
670002
660015
600019
600009
201050

201056

480026

910046

II

2,

STEREO

PiN DESCRIPTION
400053 2.5K
540001
540021
400050 250
401012
401017
670005 220
600019 1000
660026 5-25

670004
670011

116049 6800
116104 12000

480004 Single Pole,
210008

470027
201088 2N709 transistor

201050 SE-4010 transistor

201056 2N3569 transistor
230041
932041
090018
220007

GENERATOR

DESCRIPTION

10K
3010
250

ohm,

ohm,

1 K

3.3

mf,

5.5 -

1000

160

mf,
SE-4010
2N3569 trans i stor
Double pole, double throw switch
600

ohm,

15

kHz

10K

4750

ohm,
5K

ohm,

lOOK

mf,

2.2

mf,

3.9

mf,

IN-4006

5000

MC7473P

12.0mh

76

kHz

13V

ohm,

1%,

Y2w

ohm,

1%,

Y2W

trim

pot

trim

pot

35V,

10%

18

pf,

variable capacitor

mf,

16V,

electrolytic capacitor

25V,

electrolytic capacitor

tra

ns

i stor

audio transformer

low

pass filter

(OPTIONAL)

ohm,

trim

pot

ohm,

1%,

Y2W

ohm,

1%,

Y2W

trim

pot

pot

ohm,

pot

10V,

tantalum capacitor

mf,

16V,

electrolytic cappcitor

pf,

variable capacitor

20V,

tantalum capacitor

35V,

10%

pf,

33V,

polystyrene capacitor

pf,

33V,

polystyrene capacitor

doubl'e

rectifier diode

ohm

relay

integrated circuit

pot

core inductor

crystal

SIR

13B

Zener diode

metal

film

resistor

metal

film

resistor

tantalum capacitor

metal

film

resistor

metal

film

resistor

tantalum capacitor

throw

switch

MODULE

SYMBOL

R-3

R-9

R-l0

R-11

R-16,20

-18-

II 2 or

3,

SeA

GENERATOR

PIN

400041
400053
400055

402006
540017 68380

DESCRIPTION
1 K

ohm,

2.5K
10K
250

(OPTIONAL)

trim

pot

ohm,

trim

pot

ohm,

trim

pot

ohm,

Pot

ohm,

1%,

Y2

W metal

film

resistor

11173

SYMBOL

R-44
D-l,

2,

D-5

through

Q-l,4,5

Q-2,8
Q-3,7
Q-6
Q-9
Z-l,2
Z-3,5
Z-4
SW-l,2

T

-1

3

D-l0

MODU

LE

# 2

or 3 (continued)

PIN DESCRIPTION

400038

210008
220005
201049

201056
201074
201024 2N3053 trans istor
201

055
220019
220018
220011

480004 Single pole, double

910046

1 megohm,

IN-4006
IN-3604

SE-4002 transistor

2N3569 tra

2N2060 trans i stor

2N4355 trans istor

5.6V Zener diode

6.8V Zener diode
24V

Audio input -

diode

diode

Zener diode

~D®](Q)I·

trim

pot

ns

i s tor

throw

switch

600

ohm

transformer

SYMBOL

R-30
C-2
C-3

,4,
C-5
C-8
C-13,

16

C-37

C-39,

41
L-l
L-2
L-3,

4,

7,
L-5,!9,
L-6,

8,

L-14
L-15

Q-l,

2,

6

Q-3
Q-4,5

IC-l
IC-2

VVC-l,

D-l,2

Z-l,
Z-2

J-l

22, 23, 24,

10,

13

12

11

2,

3

25

MODULE

II

4,

MODULATED

PIN

402003
600019
660030
670015
640040

670014

660032

670004

930099
930100
930010
930011
9-30101

930102
930029
201065
201079
201081

230042

230007
660034
220005
220019
220007

173022

OSCILLATOR

DESCR

5K

1000
.001

30

18
18

7-100

2.2
25
50
3

10

100MHz doubler coil
100
.85
MPS
2N5179 trans i stor
2N3866
95H90
SN
MV2205

IN

IN5232
SlR 136 ·zener
RF

IPTION

ohm,

pot

mf,

16V

electrolytic capacitor

mf,

500V,

feed-through capacitor

mf,

25V,

10%

tantalum capacitor

pf,

N470,

disc ceramic capacitor

mf,

20V,

10%

tantalum capacitor

pf,

variable capacitor

mf,

35V,

10%

tantalum capacitor

uH,

rf

choke

MHz

oscillator coil

uH,

rf

choke

uH,

rf choke

MHz

amplifier coil

uH,

rf choke

6539 transistor

trans

is

tor

integrated circuit

7490 integrated circuit

voltage variable capacitor

3604 diode

5.6 V zener diode

output jack

MODULE

SYMBOL

R-l0
R-19

R-37
C-2
C-14

11173

II

S,

REF.

FREQUENCY

PIN

400043
400042
4Q2013
650033
670016

AND

CONTROL

DESCRIPTION

lOOK

oh

50K

ohm,

1 K

ohm,

15

pf,

N750,

.005

mf,

AFC

GENERATOR

m,

tr

i m

pot

trim

pot

pot

mica

capacitor

10%,

tantalum capacitor

-19-

SYMBOL

C-20A

VVC-1
L-1
L-2

L-3

Q-1,

2,

3

Q-4,

5,

10,

Q-6,

8,

9

Q-7

IC-1,

2,

3,
0-1
0-2,3

Z-l, 2

LEO-1m,2
X-tal

oven

X-tal

SW-1

4,

11

5

MODULE

PIN

670017
220023
930016 Oseillator coil
930095

930029
201065
201022

201056
201655 2N4355 transistor
230007

220004 lNS42, diode
220003

220007 SlR 13B,

062321

700031

090001
480004 Single pole, double

5 (continued)

DESCRIPTION

12

MV1876voitage variable capacitor

33

.85

MPS
SE-4001
2N3569

SN7490

1

N462,

M'{5054-1

7S

8

to

mf,

25V,

10%,

uH

rf choke

uH

rf

choke

6539 transistor

transistor

transistor

- integrated circuit

diode

13V,

(mounted

C,

7.5 watt,

10

MHz

crystal

tantalum capacitor

zener diode

on

front panel)

12V,

crystal

throw

switch

oven

SYMBOL

R-5, 33
0-1,

2,

6,

0-3,5

0-4

LED-1
K-1,

2

L-1
L-2
L-3

X-ta

I,

1

Q-1,

2.

7.

Q-3;

10

Q-4

Q-5
Q-6

Z-l

7

8.

MODULE

9

It

6,

PIN

400043
220004
210008

220005
062321
470027
930080
930076
930083
090011
201050
201033
201022
201062
201079
220007

ALARM

AND

CONTROL

DESCRIPTION

lOOK

ohm, tri m pot

1N542, diode

1N4006,

1N3604,
MV5054-1,
5000

ohm,

Mixer

coil
Doubler coil
Osci Ilator

Crystal

SE'4010,

2N2102, tran s i stor

SE

-4001, tran s i stor
2NS246,
2N5179,
SlR 13B,

diode
diode

phase

29V,

coi

HC-6

transistor

field effect transistor
tranS i stor

13V,

lock

relay

I

holder

zener diode

indicator

SYMBOL

R-1
R-6

C-1,

7,

8

C-2,

13,

14

L-1,

5,

6

-20-

MODULE

It

7,

PIN

402002
400042
660033
660032

930103

RF

POWER

AMPLIFIER

DESCRIPTION

100

ohm,

pot

50K

ohm

trim

55-300

7·100

RF

coil

mfd

mfd

variable capacitor

pot

variable capacitor

11/73

[850®lJ(Q)1·

SYMBOL

L-2
L-3
L-4,

8,

10,
L-7
L-9

L-ll

D-1,

2

Q-1
Q-2

SW-l

J-l,

2

SYMBOL

R-1

Q-1,

2
Q-3,4
Q-5

Q-6
Q-7,

8

D-l

through

15,16,17,18

D-8,

9,

Z-l

Z-2
Z-3
Z-4

10,

12

11

D-7,

D-12,

13,

14

MODULE

PIN DESCRIPTION

930104 R F
930105
930106
930107
9301
930109

220005

201090
201089 B-25-28
490004 Single pole

17~022

MODULE

PIN

512003
201024
201055
201033
201068
201039
210008

210009
220011

220012
220019
220018

08

It

8,

7 (continued)

RF
RF
RF

RF
RF
1

N3604

B3-28

RF

POWER

SUPPLY

DEseR I PTION

1.5K
2N3053,
2N4355,
2N2102,
MJE2801, transistor

2N3055,
1

N4006,

1N4142,
24V, 1 W,
15V, 1 W,

5.6

6.8

ch

oke
choke
toroidal choke
choke
choke
coil

diode

eTC

RF

transistor

eTC

RF

dou.ble

jack

ohm,

10%,

lW
tran s i stor
tran s i stor
transistor

transistor (located

rectifier diode

rectifier diode

Zener Diode

Zener Diode

V, 1 W,

V, 1 W,

Zener

Zener

transistor

throw

switch

resistor

Diode

Diode

on

heat sink)

SYMBOL

R-1
R-14

Q-l
Q-2,3

D-l

Z-l

SYMBOL

F-1
LED-3,
M-1

SW-l

T-1

4

1T!73

METER

PIN

400042
400041
201050
201056
220004
220007

BLOCK

PIN

280002
062321
700047
484024
900063

AMPLIFIER

DEseR

50K

ohm,

1K

ohm,
SE-4010, transistor
2N3569,

1

N542,

SlR

13B,

INTER-CONNECT

DEseRI

1

amp s low
MV-5054-1
Meter

Push button on-off switch
Power

IPTION

input calibrate

DC

balance

trans istor

di

ode

13V,

zener diode

PTION

blow

indicator

transformer

pot

pot

fuse

-21-

SCHEMATIC

DIAGRAMS

page

BLOCK DIAGRAM
MODULE 1
MODULE 1

MODULE 2
MODULE 2
MODULE 4
MODULE 5 REFERENCE OSCILLATOR
MODULE 6
MODULE 7
MODULE 8

or

MONAURAL AUDIO

DUAL

AUDIO (STEREO) (optional)

STEREO GENERATOR (optional)

3

SCA

GENERATOR (optional)

MODULATED OSCILLATOR

ALARM

RF

POWER

METER

AND CONTROL

POWER

AMPLIFIER
SUPPLY REGULATOR
AMPLIFIER

PIN 000252
PIN

552072

PIN

559047

PIN

559048

PIN

559049

PIN

554021

PIN

553031

PIN

550161

PIN

552073

PIN

552074

PIN

551049

23
24
25
26
27
28
29
30
31

32
33

·22·

11/73

FL-t

PA VOLTAGE

ADJUST

IIF

OUT

f!lF

LOW

PASS

FILTER

I-----H

J-I

-:

USED

ON

.-IIOT

ONLY

IIF OUT

MODULE

-8

POWER

SUPPLY

- s.

ZV

+(lIV

1

I

J

(;

8

10

12

14

16

20

22

215171

fl

~11'JlISI/7121

1IIIIIIIIIljl

lWI

1I0DULE

-7

II,.

POWER

AliI'

I

1

r-

-----

-,

I I

I I I

I

I

21

I

2°

l

l'

RI
IK

4

":'

NODULE

"'I

ALARII

+.0

51

10

6

8

IJ

5ill-2

~I

":'

,.IIEQ

.

ADJUST

LOOK

SW

ITCH

(

VERNIER

n

r-

________ ~ ________

~IIFOUTrt~----------

--~

MODULE

"5

/lAODULE

....

TOA::R

2 IIOO/JL£

"J

REFERENCE

f FIIEQ CONTROL 1I0DULATED

08C-e LOW

PWII

II

.K

1100"

SOA

...

SCA

,

- I/IIHZ

R2

III

OK

-12

ICA

IN

-+

40

OUT

•

i,o

,~

IB

to

III

I II I II "

15

"

1/

AFC

COMP IN

®~E

o -

~

STEREO
INDICATOR

.---

I

I
I

I

: I

III

OIETER

AOIP

]

II

II IIII~L

,.---

R I

WCATED

I

1.51<

ON HEAT I

L-----+++-----------ttt-I-rR4~

I

II'

SINK, I .

~

0i4$SIS

TrY'

1 q

L.--+--+-t+lf-!PA;;;;RT~OF

OIOOULE~

I

I SCHEIIATIC I _ \ AUDIO

L..--

______

.....J

...

\

'<-'

1

":ill

I

'I~::::"""

A.

'!bLOCK

B.

P.A. VOLTS

C.

RA

. CURRENT

D.

-lI.ZVDC

E.

+SVOC

F.

+15VOC

S.

REF

OSC'

H.

R.F:

OUT

I.

CONTROL

I'IlLTA6E

J.

AUDIO

IN

II

LJL

J

~

E~

S W·I
POWER

BRN

I -

I

--

---

·1

I

SC~

..,

TII-2I

P P

~A~'

~A~

~.~

iCA

"I!

INPUT

PILOT

CONTROL

NOTES;

11173

BL

Ue

1

0VAc/CT

T-I

(Q)

I POWER

LIGHT

n

....---

r

TB

-I

1 P §

(B

0 0

(}j

())

<Z

I

Ne

NO

COOl

"HASE

LOCK

ALARII

R£LAY

L--.I

IIOVAC

INPuT

I) REIIOVING

MOOULE·'

(ALARIII) ACTUATES SII'-I!

TO

ALLOW

f!

A.

TO

CONTINUE

TO

OPERATE

1

I

I

Rtl

1

50

I

I

1

LEO-I

d'

~

ON

, <'O-2~

~

\!:!7

orF.

L

PART

0'

IIIOoULE"S

SCHEIIATIC

--------

Rill

"0

1

I

I

I

I
I

_.J

L......-

II

,K POWER

II INTERIIVPT

r-t\ L

Eo

-4

~

SCA

INOICATOR

INPUT

TB-J

I(})

($

(2)

0 0

(2)

Q)

0

on

)

IIONU

AUDIO

i.e,.,

RICHT

,

AUDIO

AUDIO

~

STEREO

5~k

Hz

LOW

PASS

FILTER

-

rL-1

1

IIOOII

LE

.,

AUDIO

~°®lJ(Q)a·

COIH'OSITE
INPUT

Joe

":'

2

22

I I

~I

I

up

":'

BLOCK

DIAGRAM

FM

EXCITER

Pf'l'o4

000252

-23-

4/74

CI

BIOOpf

TI

C3

47pt

12VOC

= 210

(4

6 •

NV'

~

NV'

•

~

ISO

470

~."~

C60(']

II

E

:#c

00

'

Fi

t

R2

~JVDC

C4

47pf

-=-

RI9

CB

910pf

820

+-1-

CIO

lJOool16v

2)

,--I

_---'

FL-

J

15 KHz

LO-PASS

FRON T PANEL FUN

CTIO

N

-=-

I)

UN

LESS

OTHERwISE

SPECIFIED

:

ALL

CAPACITORS IN

MFO

NOT

ES·

ALL

RESISTORS

112 WATT

5%

R27
330K

-=-

R22

15K

Q3

SE4010

IVDC

f

3VDC

Q4

2NJ569

CI3

+

220125V

r~p,

& SEE

OWG.

A-1997

FOR

SCHEMA

TIC

C~~

1500pf

I

PRE

I '

-=-

1°

/",

R-28

10 K

R25

lOOK

RB

10K

1%

R9
3010

I

Q/o

TO

MODULATED

OSCILLATOR

-=-

RI3

CI4

I

220125V

RII

15K

12VOC

Q2

SE4010

+,

C8

22125V

8-910 :t:t 1

MONAURAL

AUDIO

PIN

552072

JANUARY

17,

1973

R26
220

~D®1J(Q)I·

MODULE

1

MONAURAL

AUDIO

PIN

552072

-24-

(;R

AUDIO IN

~ I

Ii

l-

WHl

8LXl

AUDIO IN

~Iil

wd

&SEE

0.,&

A-1997

FOR

SCHEMATIC

.

.llf 1

FRONT

PANEL

SWITCH

2J

ALL

VOLTAGES SHOWN

ARE

DC

IJ

UNLESS

OTHERWISE

SPECIFIED

ALL

RESISTORS

1/2

WATT

5°/0

ND&

ALL

.CAPACITORS

IN

MFO

10/74

RI

18

0

Rc

47

0

R20

R21

25C

IX

-:-

R.3

C2

+

p~

470

.3.3/35V

TANT

7V

C4

R5

pf

r

820K

R22

C'

,;

VVV

I

oj

47

0

J .

JU!>\

rANT

Clf:'
pf

r

-:-

C€;

QI
SE4010

1500pf'

+

C5

R7

RB

10K

I

10K

22125V

I

1

0

/

0

101

0

R6

I

R9

4.7K

I

3010

I

1

0

/0

-:-

1-:-

-:-

I

1

I

1

I

I
I

I

I
I

I

I
I

I

I

I
I

I

I

C20

\

10

V J.("

\

\

f"''':J;

--

I::JUUpT

R27

R26
10K

10K

1%

1%

R2B

301

0

1%

-:-

-:-

~

ql

2

N\I'

+.lC

.9

220

1

2

?0'?!;V

Q2
SE4010

FL-I

15kHz

CIO

RII

LO

W +

PASS

w9Jo

Fi

LTER

RIO

CII

4.7K
910pf

220

R31

+

lC23

220

rl

IC2O/25V

fL

-2

RJO

ISkl-fz

LO

W

PASS

820

r

lLTER

C25

910pf

IX

-:-

-:-

~D®lJ(Q)i·

~

RI5
15

K

-:-

-:- -:-

+

..l..

CI4

I

1000/16

V

~

R3

4

15K

R.j3

)Q8

2N3569

1.5

M

Llf

/IV

SE4010

R35

C27

A

IX

r

e

opr

-:-

-:-

-:-

R36

560

-:-

MODULE

1 (optional)

DUAL

AUDIO

(STEREO)

PIN 559047

-25-

R6

VV'-

4750

RS

1%

-L

CJ

10K

.fIZZO/IOV

InA

rANT

/t'7

RIO

100

CI

I

~

f:'4

0.8V

RMS L - ,-

-,

I I

2.?12~

-s;~O

1

3JK

R7

~

.

_-

II

~

I

01

M

)2N709

0.8V

RMS

~

-'-I--

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l

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2)

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112WIITT

5°1o

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100kHz

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4.7K

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1°02

7.5

kHz
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2N5246

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AI2
100

68

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2.2K

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58K

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33K

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~

FIL

TER

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AS

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SEE

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IN PRODUCTION

B-f!024

FOR

SCHEMA

TIC.

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ALL

CAPACITORS

IN

MFD

-

-

-

-

TP-

I

R24

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1°

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~

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MODULE

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RJ8

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ALL

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5°1

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CONTROL

PIN

550161

11173

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rn

o

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I

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1

I

1

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08

I

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09

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CI

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011

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1

2N.3055

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1

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1

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01.3

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5°1o

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04

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1 •

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+

019

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560

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3)

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5)

TO

METER

56K

-

S.2V

SUPPLY

MODULE

8

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SUPPLY

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PIN 552074

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........

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w

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lA/

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A

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1

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TONIETEI!

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WARRANTY

McMartin
manship

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under

specifically

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Upon

agrees

parts

fective

turned

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turn

Nebraska.

tin's

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prepaid,

the

specific
environmental

notification

for

McMartin's

the

prior

ment.

should
pair

parts

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to

without

as

in

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at

be

products

for a

period

normal

any

accordance

defective

number

usage

has

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prior

described

charge,

properly

to

design,

sole

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or

authorization

merchandi

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included

or

repaired

FOB

factory.

are

warranted

of

one

and

altered

authorization;

conditions

in

within

the

to

maintained

materials,

with

di

scretion,

part of

equipment

and

issued

se

risk.

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by

so

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as

or

to be

year

service.

or

repaired

or

McMartin

applicable

repair,

or

McMartin's

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equipment

may

must

McMartin's

returned

details

to

expedite

replaced

free

from

after

shipping

All

warranties

by

others

or (b)

circumstances

replace,

equipment

Buyer

be

equipment

equipment

literature

warranty

or

or

workmanship

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