Ge Mastr ii User manual

• -fi...MOB/LE

RADIO

®

MASTRO

MAINTENANCE

MANUAL

25·50

MHz,

50-WATT

STATION

TRANSMITTER

EXCITER

ASSEMBLY

PA

ASSEMBLY

SPECIFICATIONS *

FCC

Filing

Designation

Frequency

Range

Power

Output

Crystal

Multiplication

Factor

Frequency

Stability

5C-ICOM

with

EC

!COM

EC-ICOM

or

5C-ICOM

2C-ICOM

Spurious

and

Harmonic

Emission

Modulation

Audio

Frequency

Characteristics

Distortion

Deviation

Symmetry

Maximum

Frequency

Spread:

(2

to

4

channels)

25-30

MHz

30-36

MHz

36-42

MHz

42-50

MHz

Full

KT-56-A,

C

KT-57-A,

C

Extended

local

control;

Intermittent

Duty

Extended

local/DC

&

Tone

Remote

KT-58-A,

C

DC

Remote/Tone

Remote;

Intermittent

Duty

All

controls;

Continuous

Duty

25-50

MHz

50

Watts

(Adjustable

from

15

to

50

Watts)

3

±0.0005%

(-30°C

to

+60°C)

±0.0002%

(

0°C

to

+55°C)

±0.0002%

(-30°C

to

+u0°C)

At

least

85

dB

below

full

rated

power

output

Adjustable

from

0

to

±5

kHz

swing

with

instantaneous

modulation

limiting.

Within

+l

dB

to

-3

dB

of

a

6-dB/octave

pre-emphasis

from

300

to

3000Hz

per

EIA

standards.

Post

limiter

filter

per

FCC

and

EIA.

Less

than

2%

(1000

Hz)

Less

than

3%

(300

to

3000

Hz)

0.5

kHz maximum

Specifications

l dB

Degradation

0.16

MHz

0.32

MHz

0.20

MHz

0.40

MHz

0.24

MHz

0.47

MHz

0.28

MHZ

0.54

MHz

Duty

Cycle

EIA 20%

Intermittent

(KT-56-A,

C &

KT-57-A,

C)

Continuous

(KT-58-A,

C)

RF

Output

Impedance

5o

ohms

d'lese

specifications

ore

intended

primarily

for

the

use

of

the

serviceman.

Refer

to

the

appropriate

Specification

Sheet

for

the

complete

specifications.

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t""'t""'

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CD

:::0:::0

=-:

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"%j "%j

=

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n

LBI-4732

TABLE

OF

CONTENTS

SPECIFICATIONS

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

.

DESCRIPTION

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

.

CIRCUIT

ANALYSIS

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

.

Exciter

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

.

ICOMs

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

.

Audio

Preamplifier

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

.

Audio

IC

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

.

Frequency

Divider

IC

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

.

Phase

Modulators,

Amplifiers

&

Multipliers

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

.

Power

Amplifier

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

.

RF

Amplifiers

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

.

Power

Control

Circuit

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

.

MAINTENANCE

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

.

Disassembly

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

.

PA

Transistor

Replacement

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

.

Alignment

Procedure

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

.

Test

Procedures

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

.

Power

Output

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

.

Tone

Deviation

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

.

Voice

Deviation

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

.

Troubleshooting

OUTLINE

DIAGRAMS

Intermittent

and

Continuous

Duty

Exciter

&

PA

Boards;

Intermittent

Duty

PA

Assembly

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

.

Continuous

Duty

PA

Assembly

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

.

Frame

Assembly

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

.

SCHEMATIC

DIAGRAMS

(with

voltage

readings)

Exciter

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

.

Power

Amplifier

(Intermittent

Duty)

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

.

Power

Amplifier

(Continuous

Duty)

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

.

PARTS

LIST

AND

PRODUCTION

CHANGES

Exciter

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

.

Power

Amplifier

(Intermittent

Duty)

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

.

Power

Amplifier

(Continuous

Duty)

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

.

Figure

ILLUSTRATIONS

l -

Block

Diagram

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

.

2-

Typical

Crystal

Characteristics

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

.

3 -

Equivalent

!COM

Circuit

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

.

4 -

Simplified

Audio

IC

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

.

5 -

Access

to

Exciter

(Front

View)

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

.

6-

Access

to

Power

Amplifier

(Rear

View)

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

.

7 -

PA

Board

Removal

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

.

8 -

PA

Transistor

Lead

Identification

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

..

9 -

PA

Transistor

Lead

Forming

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

.

10-

Frequency

Characteristics

Vs.

Temperature

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

.

WARNING

Although

the

highest

DC

voltage

in

the

MASTR

II

station

transmitter

is

the

12

VDC

supply

voltage,

high

currents

may

be

drawn

under

short

circuit

conditions.

These

currents

can

possibly

heat

metal

objects

such

as

tools,

rings,

watchbands,

etc.,

enough

to

cause

burns.

Be

careful

when

working

near

energized

circuits!

High-

level

RF

energy

in

the

transmitter

Power

Amplifier

assembly

can

cause

RF

burns

upon

contact.

KEEP

AWAY

FROM

THESE CIRCUITS

WHEN

THE

TRANSMITTER

IS

ENERGIZED!

ii

Cover

l

3

4

5

6

7

9

10

ll

12

13

14

16

17

19

15

18

20

l

2

3

4

6

7

8

9

•

DESCRIPTION

Transmitter

Types

KT-56-A,

C,

KT-57-A,

C &

KT-58-A,

C

are

crystal-controlled,

phase

modulated

transmitters

designed

for

one-

through

four-frequency

operation

in

the

25

to

50

megahertz

band.

The

solid

state

transmitter

utilizes

both

integrated

cir-

cuits

(ICs)

and

discrete

components,

and

consists

of

the

following

assemblies:

•

Exciter

Board;

with

audio,

modulator,

amplifier

and

multiplier

stages.

Power

Amplifier

Assembly;

with

ampli-

fier,

driver,

PA,

power

control,

filter

and

antenna

switch.

CIRCUIT

ANALYSIS

EXCITER

The

exciter

uses

nine

transistors

and

two

integrated

circuits

to

drive

the

PA

as-

sembly.

The

exciter

can

be

equipped

with

up

to

four

Integrated

Circuit

Oscillator

Mod-

ules

(ICOMs).

The

!COM

crystal

frequency

ranges

from

approximately

8,33

to

16.67

meg-

ahertz,

and

the

crystal

frequency

is

multi-

plied

three

times

(divided

by

four

and

multiplied

by

12

for

a

multiplication

of

three).

EXCITER

I

MOD

~ADJUST

I r

-1

~

H

MOD

I

AUDIO PHASE AMPL-1

r------1

LIMITER

MOD

0102

CRI02

Ul02

CVIOI CRI03

I

__

_j

~

FREO

MULT-I

Fl

t---r1

BUFF~R

~

DIVIDER BUFFER

r----

TRIPLER

YIOI

0101

(+4)

0105

0106

I UIOI

I

I I

---

LBI-4732

__

Audio,

supply

voltages

and

control

functions

are

connected

through

P902

.

Centralized

metering

jack

Jl03

is

pro-

vided

for

use

with

GE

Test

Set

Model

4EX3All

or

Test

Kit

4EX3Kl2.

The

test

set

meters

the

modulator,

multiplier

and

amplifier

stages.

ICOMS

Three

different

types

of

ICOMs

are

available

for

use

in

the

exciter.

Ea~h

of

the

ICOMs

contains

a

crystal-controlled

Colpitts

oscillator,

and

two

of

the

ICOMs

contain

compensator

ICs.

The

different

ICOMs

are:

• 5C-ICOM -

contains

an

oscillator

and

a

5

part-per-million

(±0.0005%)

compensa-

tor

IC.

Provides

compensation

for

EC-ICOMs.

• EC-ICOM -

contains

an

oscillator

only.

Requires

external

compensation

from

a

5C-ICOM.

• 2C-ICOM -

contains

an

oscillator

and

a 2

PPM

(±0.0002%)

compensator

IC.

Will

not

provide

compensation

for

an

EC-ICOM.

The

ICOMs

are

enclosed

in

an

RF

shield-

ed

can

with

the

type

!COM

(5C-ICOM,

EC-ICOM

or

2C-ICOM)

printed

on

the

top

of

the

can.

Access

to

the

oscillator

trimmer

is

obtained

l

MOD

PHASE

f-----.1

AMPL-2

f-----.1

MOD

0103

CVI02

CVI03

MULT-2 MULT-3

f----

DOUBLER

--

DOUBLER

0107

OIOB

---

1----i

r----

MOO

AMPL-3

0104

AMPL-1

0109

I I

I

HLIMITER

CRI05

CRI()6

I

---

~--

-~

I

F2

•

-1

I

POWER

AMP

~

I

Yl02

I ADJUST

0204-0210

~-

: I

I

I I

~---.

I PA

I

Fe

1-_j

AMPL-1

t-----

DRIVER

I--

FINAL

f----

I YIOB

0201

0202 0203

~--.J

Figure

1 -

Transmitter

Block

Diagram

LOW

ANT

PASS

I--

SWITCH

FILTER K201

RC-265B

I

_j

1

LBI-4732

CIRCUIT

ANALYSIS

by

prying

up

the

plastic

tab

on

the

top

of

the

can.

The

tabs

can

also

be

used

to

pull

the

ICOMs

out

of

the

radio.

Frequency

selection

is

accomplished

by

switching

the

!COM

keying

lead

(termianl

6)

to

A-.

The

oscillator

is

turned

on

by

applying

a

keyed

+10

Volts

to

the

external

oscillator

load

resistor.

CAUTION

All

ICOMs

are

individually

compen-

sated

at

the

factory

and

cannot

be

repaired

in

the

field.

Any

attempt

to

repair

or

change

an

!COM

fre-

quency

will

void

the

warranty.

In

transmitter

types

KT-56-A,

C

using

EC-ICOMs,

at

least

one

5C-ICOM

must

be

used.

The

5C-ICOM

is

normally

used

in

the

receiver

Fl

position,

but

('<Jn

be

used

in

any

transmit

or

receivr

rn~ition.

One

5C-

ICOM

can

provide

cnmpensatiqn

for

up

to

8

EC-ICOMs

in

the

transmit

and

receiver.

Should

the

5C-ICOM

compensator

fail

in

the

open

mode,

the

EC-ICOMs

will

still

maintain

2

PPM

frequency

stability

from

0°C

to

55°C

(+32°F

to

131°F)

due

to

the

regulated

com-

pensation

voltage

(5

Volts)

from

the

10-

Volt

regulator

IC.

In

transmitter

types

KT-57-A,

C

and

KT-58-A,

C

at

least

one

5C

!COM

is

required

for

the

transmitter

and

at

least

one

5C-ICOM

is

required

for

the

receiver.

If

desired,

up

to

8 5C-ICOMs

may

be

used

in

the

station.

RC-2443

-10

L.__L__-L~f-----+--+---+---f--.;..._-=-.....c:.....J

-15" +10° 26.5°

+42°

65°

DEGREES CENTIGRADE

Figure

2 -

Typical

Crystal

Characteristics

The

2C-IC0Ms

are

self-compensated

at

2

PPM

and

will

not

provide

compensation

for

EC-ICOMs.

2

Oscilla~or

Circuit

The

quartz

crystals

used

in

ICOMs

ex-

hibit

the

traditional

"S"

curve

character-

istics

of

output

frequency

versus

operating

temperature.

At

both

the

coldeot

and

hottest

temper-

atures,

the

frequency

increases-with

increas-

ing

temperature.

In

the

middle

temperature

range

(approximately

0°C

to

+55°C),

frequency

decreases

with

increasing

temperature.

Since

the

rate

of

change

is

nearly

lib-

ear

over

the

mid-temperature

range,

the

out-

put

frequency

change

can

be

compensated

by

choosing

a

parallel

compensation

capacitor

with

a

temperature

coefficient

approximately

equal

and

opposite

that

of

the

crystal.

Figure

2

shows

the

typical

performance

of

an

uncompensated

crystal

as

well

as

the

typical

performance

of

a

crystal

which

has

been

matched

with

a

properly

chosen

compen-

sation

capacitor.

At

temperatures

above

and

below

the

mid-

range,

additional

compensation

must

be

intro-

duced.

An

externally

generated

compensation

voltage

is

applied

to

a

varactor

(voltage-

variable

capacitor)

which

is

in

parallel

with

the

crystal.

In

transmitter

types

KT-56-A,

C a

con-

stant

bias

of

5

Volts

(provided

from

Regula-

tor

IC

U901

in

parallel

with

the

compensator)

establishes

the

varactor

capacity

at

a

con-

stant

value

over

the

entire

mid-temperature

range.

With

no

additional

compensation,

all

of

the

oscillators

will

provide

2

PPM

fre-

quency

stability

from

0°C

to

55°C

(+32°F

to

131°F).

Compensator

Circuits

Both

the

5C-IC0Ms

and

2C-ICOMs

are

tem-

perature

compensated

at

both

ends

of

the

tem-

perature

range

to

provide

instant

frequency

compensation.

An

equivalent

ICOM

circuit

is

shown

in

Figure

3.

The

cold

end

compensation

circuit

does

not

operate

at

temperatures

above

0°C.

When

the

temperature

drops

below

0°C,

the

circuit

is

activated.

As

the

temperature

decreases,

the

equivalent

resistance

decreases

and

the

compensation

voltage

increases.

The

increase

in

compensation

voltage

decreases

the

capacity

of

the

varactor

in

the

oscillator,

increasing

the

output

fre-

quency

of

the

ICOM.

The

hot

end

compensation

circuit

does

not

operate

at

temperatures

below

+55°C,

When

the

temperature

rises

above

+55°C,

the

circuit

is

activated.

As

the

temperature

•

CIRCUIT

ANALYSIS

LBI-4732

NOT

PRESENT

IN

EC-ICOM

REG

IOV COMPENSATION

~v

~--------------~2~------------------------------------,

COMPENSATION

I

IC

Ul

COLD END COMP

I

I HOT END COMP

I

-l

I

24K

I

COMPENSATOR~

OUTPUT

24K

I

OSCILLATOR

CIRCUIT

\

+IOV

..._

____

_.

________

.._.

____

._____,MID-RANGE

A-

RF

OUT

FREQ

SELECT

L

__

_

A-

_____J

L

__

TEMP.

COMPENSATION

__CAP_A_C_IT-OR

__

J

RC-2444

Figure

3 -

Equivalent

ICOM

Circuit

increases,

the

equivalent

resistance

de-

creases

and

the

compensation

voltage

de-

creases.

The

decrease

in

compensation

volt-

age

increases

the

capacity

of

the

varactor,

decreasing

the

output

frequency

of

the

ICOM.

SERVICE NOTE:

Proper

ICOM

operation

is

de-

pendent

on

the

closely-controlled

input

volt-

ages

from

the

10-Volt

regulator.

Should

all

of

the

ICOMs

shift

off

frequency,

check

the

10-Volt

regulator

module

or

check

output

of

5C-ICOM.

AUDIO PREAMPLIFIER

The

transmitter

Audio

Preamplifier

is

not

part

of

the

transmitter

and

is

covered

in

the

station

Maintenance

Manual.

AUDIO

IC

The

transmitter

audio

circuitry

is

con-

tained

in

audio

IC-Ul02.

A

simplified

draw-

ing

of

the

audio

IC

is

shown

in

Figure

4.

Audio

from

the

Station

Preamplifier

at

12

is

coupled

through

capacitor

Cl

to

the

base

of

Ql

in

the

operational

amplifier-

limiter

circuit.

The

operational

amplifier-limiter

cir-

cuit

consists

of

Ql,

Q2

and

Q3.

Q3

provides

limiting

at

high

signal

levels.

The

gain

of

the

operational

amplifier

circuit

is

fixed

by

negative

feedback

through

Rl9,

R20

and

the

resistance

in

the

network

(pin

9).

The

output

of

Q3

is

coupled

through

a

de-emphasis

network

(RIO

and

C3)

to

an

act-

ive

post-limiter

filter

consisting

of

C4,

C5,

C6,

Rll,

Rl2,

Rl3,

Rl5,

Rl7

and

Q4.

Following

the

post-limiter

filter

is

class

A

amplifier

Q5.

The

output

of

Q5

is

coupled

through

MOD

ADJUST

potentiometer

Rl27

to

the

phase

modulators.

SERVICE NOTE:

If

the

DC

voltages

to

the

Audio

IC

are

correct

and

no

audio

output

can

be

obtained,

replace

Ul02.

For

radios

equipped

with

Channel

Guard,

tone

from

the

encoder

is

applied

to

the

phase

modulators

through

CHANNEL

GUARD

MOD

ADJUST

potentiometer

Rl28,

and

resistors

RllO,

Rl21

and

Rl24.

Instructions

for

set-

ting

Rl28

and

station

gain

Control

Rl4

on

the

Audio

Preamplifier

are

contained

in

the

modulation

adjustment

section

of

the

Trans-

mitter

Alignment

Procedure.

3

LBI-4732

CIRCUIT

ANALYSIS

OPERATIONAL

AMP-

LIMITER

--~~----.-----~~------------------+-------------~4

13r-----------+-~--~----+-_.

______

._

__

_.

TX

AUDIO

LO

R20

40K

10

9

Rl9

40K

DECOUPLER NETWORK

TO

Cl50

POST-LIMITER

FILTER

04

AMPLIFIER

Rl7

Rl5

REG

+IOV

A-

RC-2668

Figure

4 -

Simplified

Audio

IC

FREQUENCY

DIVIDER

IC

The

output

at

3

of

the

selected

ICOM

is

coupled

through

buffer

amplifier

QlOl

to

frequency

divider

UlOl,

which

di-

vides

the

oscillator

frequency

by

4.

The

divider

consists

of

two

J-K

flip-flops

con-

nected

as

a

binary

counter.

When

the

transmitter

is

not

keyed

(no

ICOMs

on),

QlOl

is

saturated

(turned

on)

with

its

collector

voltage

near

zero.

Key-

ing

the

transmitter

starts

one

of

the

ICOMs,

and

its

output

cuts

QlOl

on

and

off

once

each

cycle.

As

QlOl

turns

off

during

each

cycle,

the

drop

in

collector

voltage

causes

the

left

flip-flop

to

change

state.

Assume

the

flip-flop

was

in

the

"O"

state

(the

out-

put

at

"Q"

near

A-).

The

first

cycle

of

the

oscillator

output

causes

it

to

switch

to

the

"1"

stage

(output

at

"Q"

approximate-

ly

5

Volts).

The

second

cycle

will

cause

the

flip-flop

to

switch

back

to

the

"O"

state.

Therefore,

it

requires

two

oscilla-

tor

cycles

to

switch

the

left

flip-flop

through

one

complete

cycle

from

"O"

to

"1"

and

back

to

"0".

When

the

left

flip-flop

switches

from

"1"

to

"0",

it

causes

the

right

flip-flop

to

change

state.

It

requires

two

cycles

of

the

left

flip-flop

to

switch

the

right

flip-

flop

from

"O"

to

"1"

and

back

to

"0".

There-

fore,

four

cycles

of

the

oscillator

output

are

required

for

each

cycle

of

output

from

9

of

UlOl.

If

UlOl

was

operating

into

a

pure

re-

sistive

load,

its

output

would

be

a

square

wave.

However,

the

modulator

circuit

pre-

4

sents

a

tuned

load

to

the

IC,

so

that

harmon-

ics

are

filtered

out

and

the

waveform

at

the

junction

of

Cl02

and

Cl03

(modulator

input)

is

essentially

a

sine

wave

at

one-fourth

the

oscillator

frequency.

The

output

of

the

fre-

quency

divider

is

coupled

through

DC

blocking

capacitor

Cl02

to

the

first

modulator

stage.

PHASE

MODULATORS,

AMPLIFIER & MULTIPLIERS

The

first

phase

modulator

is

varactor

(voltage-variable

capacitor)

CVlOl

in

series

with

tunable

coil

LlOl.

This

network

appeHrs

as

a

series-resonant

circuit

the

RF

output

of

the

oscillator.

An

audio

signal

applied

to

the

modulator

circuit

through

blocking

capacitor

Cll5

varies

the

bias

of

CVlOl,

re-

sulting

in

a

phase

modulated

output.

A

volt-

age

divider

network

(Rl08

and

Rl09)

provides

the

proper

bias

for

varactors

CVlOl,

CV102

and

CV103.

The

output

of

the

first

modulator

is

coupled

through

blocking

capacitor

Cl06

to

the

base

of

Class

A

amplifier

Ql02.

The

first

modulator

stage

is

metered

through

a

metering

network

consisting

of

Rll5,

Rl50,

Cl07

and

CRlOl.

Diodes

CR102

and

CR103

re-

move

any

amplitude

modulation

in

the

modula-

tor

output.

Following

Ql02

is

another

Class

A

Ampli-

fier,

Ql03.

The

output

of

Ql03

is

applied

to

the

second

modulator

stage.

The

second

modulator

consists

of

two

cascaded

modulator

circuits

consisting

of

CV102,

Ll02,

Ll03

and

CV103.

Following

the

second

modulator

is

a

Class

A

amplifier

Ql04.

The

output

of

the

second

modulator

stage

is

metered

through

•

CIRCUIT

ANALYSIS

LBI-4732

Rl33, Rl45,

Cll7

and

CR104,

and

is

applied

to

the

base

of

buffer

Ql05.

Diodes

CR105

and

CR106

remove

any

amplitude

modulation

in

the

second

modulator

output.

Buffer

Ql05

is

saturated

when

no

RF

signal

is

present.

Applying

an

RF

signal

to

Ql05

provides

a

sawtooth

waveform

at

its

collector

to

drive

the

class

C

tripler,

Ql06.

The

tripler

stage

is

metered

through

Rl46.

The

output

of

Ql06

is

coupled

through

tuned

circuits

TlOl,

Tl02

and

Tl03

to

the

base

of

dobuler

Ql07,

TlOl,

Tl02

and

Tl03

are

tuned

to

one-fourth

of

the

operating

frequency.

The

doubler

stage

is

metered

through

Rl47.

The

output

of

Ql07

is

coupled

through

tuned

circuits

Tl04

and

Tl05

to

the

base

of

second

doubler

Ql08.

Tl04

and

Tl05

are

tuned

to

one-half

the

operating

frequency.

Ql08

is

metered

through

Rl48.

The

output

of

Ql08

is

coupled

through

three

tuned

circuits

(Tl06,

Tl07

and

Tl08)

to

the

base

of

amplifier

Ql09.

The

circuits

are

tuned

to

the

transmitter

operating

fre-

quency.

Ql09

is

a

class

C

amplifier

with

a

col-

lector

feed

network

consisting

of

Cl39,

Cl41,

Ll04,

Ll08

and

Rl43.

The

stage

is

metered

through

Rl49.

The

amplifier

collec-

tor

circuit

consists

of

Cl42,

Cl43,

Cl46

and

Ll05,

and

matches

the

amplifier

output

to

the

input

of

the

power

amplifier

assembly

.

POWER AMPLIFIER

The

PA

assembly

uses

three

RF

power

transistors

and

seven

transistors

in

the

Power

Control

circuitry

to

provide

a

power

output

of

50

Watts.

The

broadband

PA

has

no

adjustments

other

than

Power

Control

po-

tentiometer

R216.

Supply

voltage

for

the

PA

is

connected

through

power

leads

from

the

system

board

to

feedthrough

capacitors

C297

and

C298

on

the

bottom

of

the

PA

assembly.

C297,

C298

and

C299,

L296

and

L297

prevent

RF

fr.om

getting

on

the

Power

leads.

Diode

CR295

will

cause

the

main

fuse

in

the

fuse

assembly

to

blow

if

the

polarity

of

the

power

leads

is

re-

versed.

Centralized

metering

jack

J205

is

pro-

vided

for

use

with

GE

Test

Set

Model

4EX3All

or

Test

Kit

4EX8Kl2.

The

Test

Set

meters

the

Ampl-1

drive

(exciter

output),

Ampl-1

power

control,

Driver

and

PA

current.

RF

AMPLIFIERS

The

exciter

output

is

coupled

through

an

RF

cable

to

PA

input

jack

J203.

The

RF

is

coupled

through

DC

blocking

capacitor

C202

to

the

base

of

Class

C

amplifier

Q201

through

a

matching

network.

The

network

matches

the

50-ohm

input

to

the

base

of

Q20l,

and

consists

of

C205,

C206,

C235,

L201,

L202

and

L203.

Part

of

the

RF

input

is

rectified

by

CR201

and

used

to

activate

the

Power

Control

circuit.

Another

portion

of

the

rectified

RF

is

applied

to

~oltage

dividers

R223

and

R224

for

metering

the

Ampl-1

drive

at

J205.

Collector

voltage

to

Q201

(Ampl-1)

is

controlled

by

the

Power

Control

circuit,

and

is

applied

through

a

collector

stabiliz-

ing

network

consisting

of

L224

and

R225

and

collector

feed

network

L204

and

C207.

The

collector

voltage

of

Q201

is

metered

through

R235

at

J205.

The

output

of

Q201

is

applied

to

the

base

of

Class

C

driver

Q202

through

a

low-

pass

filter

matching

network

(C209,

C210,

L205

and

L206).

Resistors

R202,

R203

and

R204

lower

the

gain

of

Q202.

Collector

voltage

to

Q202

is

coupled

through

a

col-

lector

stabilizing

network

consisting

of

L225

and

R233

and

collector

feed

network

L208

and

C213.

Collector

current

for

Q202

is

metered

across

tapped

manganin

resistor

R230

at

J205

(Driver

Current).

The

reading

is

taken

on

the

one-Volt

scale

with

the

High

Sensi-

tivity

button

pressed,

and

read

as

10

am-

peres

full

scale.

Following

Q202

is

an

interstage

cou-

pling

network

(C214

through

C221,

L209

through

L211,

R206

and

R207.)

The

output

is

applied

to

the

base

of

the

class

C

PA

stage,

Q203.

Supply

voltage

is

coupled

through

a

collector

stabilizing

network

consisting

of

L226

and

R234

and

collector

feed

network

C222

and

L212.

Collector

current

for

Q203

is

metered

across

tapped

manganin

resistor

R231

at

J205.

The

reading

is

taken

on

the

one-Volt

scale

with

the

High

Sensitivity

buttom

pressed,

and

read

as

10

amperes

full

scale.

The

PA

output

is

coupled

through

an

output

matching

network

(C224,

C225,

C226,

L213

and

L214,)

to

an

M-derived,

constant

K

low-pass

filter.

C230

through

C233

pro-

vides

grtiund

isolation.

The

filter

output

is

applied

to

the

antenna

through

antenna

switch

K201.

r-----------------

WARNING

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

The

stud

mounted

RF

Power

Transis-

tors

used

in

the

transmitter

con-

tain

Beryllium

Oxide,

a TOXIC

sub-

stance.

If

the

ceramic,

or

other

encapsulation

is

opened,

crushed,

broken

or

abraded,

the

dust

may

be

hazardous

if

inhaled.

Use

care

in

replacing

transistors

of

this

type

.

5

LBI-4732

POWER

AMPLIFIER

POWER

CONTROL

CIRCUIT

When

the

transmitter

is

keyed,

recti-

fied

RF

from

CR201

is

applied

to

the

base

of

switch

Q204,

turning

it

on.

Turning

on

Q204

turns

on

voltage

regulator

Q206

which

supplies

a

constant

voltage

to

Power

Adjust

potentiometer

R216.

Q208,

Q209

and

Q210

operate

as

an

am-

plifier

chain

to

supply

voltage

to

the

col-

lector

of

Q201

(Ampl-1).

The

setting

of

R216

determines

the

voltage

applied

to

the

base

of

Q208.

The

higher

the

voltage

at

the

base

of

Q208,

the

harder

the

amplifiers

conduct,

supplying

more

collector

voltage

to

Q201.

The

lower

the

voltage

at

the

base

of

Q208,

the

less

collector

voltage

is

sup-

plied

to

Q201.

Reducing

the

supply

voltage

to

Q201

reduces

the

drive

to

Q202

and

Q203,

thereby

reducing

the

power

output

of

the

PA.

The

power

output

can

be

adjusted

by

R216

from

approximately

15

to

50

Watts.

Temperature

protection

is

provided

by

Q205,

Q207

and

thermistor

RT201

which

is

mounted

in

the

PA

heatsink.

Under

normal

operating

conditions,

the

circuit

is

inact-

ive

(Q205

is

on

and

Q207

is

off).

When

the

heatsink

temperature

reaches

approximately

100°C,

the

resistance

of

RT201

decreases.

This

increases

the

base

voltage

applied

to

Q205,

turning

it

off.

Turning

off

Q205

allows

Q207

to

turn

on,

decreasing

the

volt-

age

at

Power

Adjust

potentiometer

R216.

This

reduces

the

base

voltage

to

Q208

which

causes

Q209

and

Q210

to

conduct

less,

re-

ducing

the

collector

voltage

to

Q201

(Ampl-1).

This

reduces

the

transmitter

output

power,

keeping

the

heatsink

at

a

maximum

of

approximately

100°C.

When

the

heatsink

temperature

decreases

below

100°C,

the

temperature

control

circuit

turns

off,

allowing

the

normal

transmitter

power

out-

put.

MAINTENANCE

DISASSEMBLY

For

a

more

complete

mechanical

parts

break-

down

refer

to

the

station

manual.

To

service

the

transmitter

exciter

from

the

front:

1.

2.

3.

Turn

the

two

latching

knobs

~

coun-

terclockwise

to

unlatch

the

Radio

Panel

Front

Door.

Refer

to

Figure

5.

Swing

the

Radio

Panel

Front

Door

down

as

shown.

Remove

covers.

To

service

the

transmitter

Power

Amplifier

from

the

rear:

1.

Remove

the

top

two

screws

{8)

on

the

Intermittent

or

Continuous'nGty

Power

Amplifier.

Refer

to

Figure

6.

6

2.

Figure

5 -

Access

To

Exciter

-

Front

View

Figure

6 -

Access

To

Power

Amplifier

-

Rear

View

Swing

the

Power

Amplifier

down

as

shown.

Remove

the

top

cover

of

the

Power

Amplifier.

NOTE

If

the

heatsink

blower

option

is

present,

this

blower

must

be

re-

moved

before

the

Power

Amplifier

can

be

lowered.

•

MAINTENANCE

LBI-4732

To

remove

the

PA

board:

Refer

to

Figure

7.

1.

2.

3.

4.

5.

Remove

the

PA

top

cover

and

unplug

the

exciter/PA

cable

~

Unsolder

the

two

feedthro~

coils

~

and

the

thermistor

leads

~

.

For

Continuous

Duty

stations

only,

re-

move

all

heatsink

sections

from

the

heat

dissapator

plate.

Remove

the

PA

transistor

hold-down

nuts

and

spring

washer

on

the

bottom

of

the

PA

assembly.

Remove

the

four

PA

board

mounting

screws

fG)

,

th~ive

screws

in

the

filter

~ting

,

and

the

retaining

screw

in

Q210

,

and

lift

the

board

out.

PA

TRANSISTOR

REPLACEMENT

When

replacing

a

power

transistor

where

more

than

one

are

in

parallel,

make

sure

all

the

paralleled

transistors

are

from

the

same

manufacturer

for

proper

operation.

1.

2.

3.

WARNING

The

stud

mounted

RF

Power

Transis-

tors

used

in

the

transmitter

con-

tain

Beryllium

Oxide,

a TOXIC

sub-

stance.

If

the

ceramic

or

other

encapsulation

is

opened,

crushed,

broken

or

abraded,

the

dust

may

be

hazardous

if

inhaled.

Use

care

in

replacing

transistors

of

this

type.

To

replace

the

PA

RF

transistors:

Unsolder

one

lead

at

a

time

with

a

50-

Watt

soldering

iron.

Use

a

scribe

to

hold

the

lead

away

from

the

printed

circuit

board

until

the

solder

cools.

Turn

the

transmitter.

NOTE

If

the

transmitter

has

a

continuous

Duty

Power

Amplifier

a

section

of

Heat

Sink

may

have

to

be

removed

to

get

to

the

transistor

hold-down

nuts.

Apply

a

light

coat

of

silicon

grease

when

replacing

the

removed

section

of

Heat

Sink.

Hold

the

body

of

the

transistor

to

pre-

vent

it

from

turning.

Remove

the

tran-

sistor

hold-down

nut

and

spring

washer

through

the

hole

in

the

heatsink

with

an

11/32-inch

nut-driver.

Lift

out

the

old

solder

from

the

printed

cir-

cuit

board

with

a

de-soldering

tool

such

as

a

SOLDA

PULLT®.

Specjal

care

should

be

taken

to

prevent

damage

to

the

printed

circuit

board

runs.

4_._·

5.

Trim

the

new

transistor

leads

(if

re-

quired)

to

the

lead

length

of

the

re-

moved

transistor.

Cut

the

collector

lead

at

a

45°

angle

for

future

identi-

fication

(see

Figure

7).

The

letter

"C"

on

the

top

of

the

transistor

indi-

cates

the

collector.

Figure

7 -

PA

Board

Removal

Applying

a

coating

of

silicon

grease

around

the

transistor

mounting

surface,

and

place

the

transistor

in

the

mount-

ing

hole.

Align

the

leads

as

shown

in

the

Outline

Diagram.

Then

hold

the

body

of

the

transistor

and

replace

the

holding-down

nut

and

spring-washer,

us-

ing

moderate

torque

(8

inch-pounds).

A

torque

wrench

must

be

used

for

this

ad-

justment

since

transistor

damage

can

result

if

too

little

or

too

much

torque

is

used.

6.

Make

sure

that

the

transistor

leads

are

formed

as

shown

in

Figure

8

so

that

the

leads

can

be

soldered

to

the

printed

circuit

pattern,

starting

from

the

inner

edge

of

the

mounting

hole.

7.

Solder

the

leads

to

the

printed

circuit

pattern.

Start

at

the

inner

edge

of

mounting

hole

and

solder

the

remaining

length

of

transistor

lead

to

the

board.

Use

care

not

to

use

excessive

heat

that

causes

the

printed

wire

board

runs

to

lift

up

from

the

board.

Check

for

shorts

and

solder

bridges

before

applying

power.

CAUTION

----------------~

Failure

to

solder

the

transistor

leads

as

directed

may

result

in

the

generation

of

RF

loops

that

could

damage

the

transistor

or

may

cause

low

power

output.

7

LBI-4732

COLLECTOR

MAINTENANCE

SOLDER ENTIRE LEAD

FROM

EDGE

OF

MOUNTING HOLE

TO

END

OF

LEAD

HOLD-

DOWN

NUT S

SPRING

WASHER

RC-2309

Figure

8 -

Lead

Identification

Figure

9 -

Lead

Forming

Copyright

©

1975,

General

Electnc

Company

8

MOBILE

RADIO

DEPARTMENT

GENERAL

ELECTRIC

COMPANY

o

LYNCHBURG,

VIRGINIA

24502

GENERAL.

ELECTRIC

•

Tritdemark

of

General

Electric

Company

US

A

Prmted

in

U

S.A

•

MODULATION

LEVEL ADJUSTMENT

The

MOD

ADJUST

(Rl27)

wns

adjusted

to

the

proper

setting

before

shipment

and

should

not

normally

require

readjustment.

This

setting

permits

approximately

75%

modulation

for

the

sverage

voice

level.

The

aduio

peaks

which

would

cause

overmodulation

are

clipped

by

the

modulation

limiter.

The

.limiter,

in

con.)

unction

with

the

de-emphasis

network,

instan-

taneously

limits

the

slope

of

the

audio

wave

to

the

modulator,

thereby

preventing

overmod-

ulation

while

preserving

intelligibility,

TEST

EQUIPMENT

l.

An

audio

oscillator

(GE

Model

4EX6Al0).

2.

A

frequency

modulation

monitor.

3.

An

output

meter

or

a VTVM.

4,

GE

Test

Set

Model

4EX3All

or

4EX8Kl2.

PROCEDURE

l.

Set

the

station

g:ain

control

Rl4

to

it::;

fully

clockwise

position.

2.

Connect

the

audio

oscillntor

and

the

meter

through

a

0.5

11F

(or

larger)

DC

block-

ing

capacitor,

across

audio

input

terminals

JlO

(Green-Hi)

and

Jll

(Black-Lo)

on

GE

Test

Set,

and

connect

the

Red

Test

set

plug

to

the

system

Red

metering

plug.

3.

Set

the

audio

generator

frequency

to

l

kHz,

A.

In

all

station

combinations

except

Local

Control

Intermittent

Duty

combina-

tions,

set

the

audio

generator

output

to

30

millivolts

RMS,,

B.

In

Local

Control

Intermittent

Duty

station

combinations,

set

the

audio

generator

output

to

1,0

volt

RMS.

4.

For

transmitters

without

Channel

Guard,

set

MOD

ADJUST

Rl27

for

a

4.5

kHz

swing

with

the

deviation

polarity

which

gives

the

highest

reading

as

indicated

on

tbe

frequency

modulation

monitor.

5.

For

transmitters

with

Channel

Guard

set

Channel

Guard

MOD

ADJUST

Rl05

for

zero

tone

deviation.

Next,

with

the

30

millivolts

signal

at

1000Hz

applied,

set

MOD

ADJUST

Rl04

for

:l.

75

kHz

deviation.

Then

remove

the

signal

from

the

audio

oscil-

lator

and

set

Channel

Guard

i\IOD

ADJUST

Rl28

for

0.75

kHz

tone

deviation.

6.

For

multi-frequency

transmitters,

set

the

deviation

as

described

in

Steps

4

or

5

on

the

channel

producing

the

largest

amount

of

deviation.

7.

Remove

the

audio

oscillator

and

key

the

mike.

While

talking

in

a

normal

voice

at

a

distance

of

four

to

six

inches

from

the

station

microphone,

adjust

station

gain

control

Rl4

for

a

deviation

of

3

kHz

as

measured

on

the

deviation

monitor.

PA POWER

INPUT

For

FCC

purposes,

the

PA

power

input

can

be

determined

by

measuring

the

PA

supply

voltage

and

PA

current,

and

using

the

following

formula:

i'i

PA

vol

Lage

x

PA

current

where:

Pi

is

the

power

input

in

Watts,

PA

voltage

is

measured

with

Test

Set

Model

4EX3All

in

Position

G

on

the

15-Volt

range

(read

as

15

Volts

full

scale),

and

with

the

polarity

switch

in

the

(-)

position.

With

Test

Set

Model

4EX8Kl2,

use

the

B+

position

and

tbe

1-Volt

range

(read

as

15

Volts

full

scale),

with

the

HIGH

SENSITIVITY

button

pressed

and

the

polarity

switch

in

the

(-)

position.

PA

current

is

measured

with

the

Test

Set

in

Position

Gin

the

Test

l

position,

and

with

the

HIGH

SENSITIVITY

button

pressed

(10

amperes

full

scale).

Example:

Pi=

12.6

Volts

x

5.0

amperes

63

Watts.

ICOM FREQUENCY

ADJUSTMENT

First,

check

the

frequency

to

deternine

if

11ny

adjustment

is

required.

The

i're-

quency

should

be

set

with

a

frequency

meter

or

counter

with

an

absolute

accuracy

that

lS

5

to

10

times

better

thnn

tho

tolernnco

to

be

maintained,

nnd

with

the

entire

radio

as

near

as

possible

to

an

ambient

temperature

of

26.5°C

(79.8"F).

MASTR

II

ICOMs

should

be

reset

only

when

the

frequency

shows

devintions

in

excess

oi'

the

following

limits:

A.

±0.5

PPM,

when

the

radio

is

at

26.5"C

(79.8"F).

B.

±2

PPM

at

any

other

temperature

within

the

range

of

-5°C

to

+55"C

(+23"F

to

+l3l"F).

C.

The

!:>pecification

limit

(±2

PPM

or

±5

PPM)

at

any

temperature

within

the

rnng-cs

of

-40cC

to

-S"C

(-40°F

to

+23"F)

or

-t-55''C

to

+70'-'C

(-t-131

"F

to

+l58"F).

If

an

adjustment

is

required,

pry

up

the

cover

on

the

top

of

the

ICOM

to

expoc;e

the

trimmer,

and

use

one

of

the

following

procedures:

If

the

radio

is

at

an

amblent

temperature

of

26.5°C

(79.8°F')

set

the

o:;,cillalur

:for

the

correct

operating

frequency.

If

tbe

radio

is

not

at

an

ambient

tempex·alure

of

26.5"C

setting

errors

cnn

!Je

minimized

as

follows:

A.

To

hold

~etting,

error

to

±0.6

PPM

(which

is

considered

l'Caf>onable

for

5

PPM

ICOMS):

l.

Maintain

tile

:t'adio

at

26.5°C

(±S"C)

and

~el

I

he

osclllntor

to

desired

frequency,

or-

2.

Maint:;in

the

radio

<1l

26.5'C

(±l0°C)

and

offset

the

oscillator,

as

a

function

of

actual

tempe:t'ature,

hy

the

amo11nt "'!1nwu

in

Figure

9"

B.

To

hold

setting

error

to

±0.35

PPM

(which

is

considered

reasonable

for

2

P~!

ICOMs):

Maintain

unit

at

26.5"C

(-t5°C)

and

offset

the

os~illator.

as

a

function

of

actual

tempernture,

by

the

amount

slwwn

in

F'ig:ure

9.

For

flxamplP.:

A"'sume

thf'

amhient

tomp('ratnro

of

the

radio

is

l8.5°C

(65.4°F).

At

that

temperature,

the

curve

:.:haws a

correction

fa~tor

of

0.3

PPM.

(At

25

MHz, 1

PPM

lS

25Hz.

At

50

tlliz,

l

PPM

is

50

Hz).

With

an

opernting

frequency

of

50

MHz,

set

the

oscillator

for

a

reading

of

15Hz

(0.3

x

50

Hz)

higher

than

thP

licensed

operating

frequency.

If

a

negative

correction

factor

is

obtained

(at

temperaturos

above

26.5°C),

set

the

os~illator

for

the

indL~u

ted

PPM

lower

than

the

lict2nsed

operating

Jrequency.

DEGREES FAHRENHEIT

618

654

690

726

76.6

79.8

834

870

906

942

978

;:Et0.6r--~

a._

+05

a._

+04

0:::

+

0.3

~

+02

0:::+01,

w '

of-

>-

-0

I

~

-02

w

--03

::)

0

-0.4

w

-0

5

0:::

lL

-06

L_

16

5

18

5

-1 i

T--,--T-~

I , .

I . .

-1--i---

---

-

-+-

----+----

----<

------+--

1

! +

20

01

22 S

24

2

26

5

28

5

30

5

32

5

34

s

36

5

-5" LIMIT

C<EF

+5"

LiMIT

DEGREES CENTIGRADE

F(-2453

Figure

9

-Frequency

Characteristics

Vs.

Temperature

11\ifU-tPIII

HP

T

-''N~>

CIJNli•'JIJOIJS

DLJTY

;\LL

CXCEPT

I

OU,L

r:0~JTROL

SYSJCP.'

ROAI:

lJ

.\·IL

T~RING

JACI<

MOD

ADJUST

R127

CHANNEL

GUARD

MOD

ADJUST

R128

EXCITER

ASSEMBLY

CONTINUOUS DUTY

PA

ANTENNA

JACK

J243

INTERMITTENT DUTY

PA

ANTENNA

-

..

JACK

J201

PA

ASSEMBLY PA

METERING

JACK

J205

TRANSMITTER

ALIGNMENT

LBI-4732

EQUI

P~'IENT

REQUIRED

1.

GE

Tust

Set

\Iodel

4EX3All

or

Test

Kit

4EX8Kl2.

2.

A

50-ohm

wattmeter

cormectud

to

antenna

jack

J906.

3.

A

frequency

counter.

PRELBIINARY

CHECKS

AND

fiD.JUSniENTS

l.

Place

ICOM::;

on

Exciter

Board

(crystal

frequency

-

operating

frequency

7

3).

2.

For

a

large

change

in

frequency

or

a

badly

mis-aligned

transmitter,

pre-set

tho

slugs

to

TlOl

through

TlOS.

and

LlOl,

Ll02

and

LlO::l

to

the

boltom

of

the

coil

form.

NOTE

The

tuning

frequency

for

multi-frequency

trnnsmitters

is

determined

by

the

operating-

frequency

Dnd

the

:frequency

spread

between

l'reqllencies.

Reier

to

the

tnblo

below

for

maximum

frequency

spread.

3.

For

multi-frequency

transmitterf>

with

a

fruquer:cy

spread

less

than

that

specified

in

column

(1),

tune

the

tn1nsmitter?

to

the

lowest

.frequency.

For

frequency

spread

oxceodlng

t!1e

limits

specified

in

column

(1),

tuno

the

transmitter

11sing

a

cent~r

[J·eqtJency

t11ne

11p

ICOM.

Except

the

maximum

frequency

spread

can

be

extended

to

tht>

linits

specified

in

~olumn

(3)

with

1

dB

deg-radation.

For

tuning

LlOl,

LlO~,

L103,

alwnys

tune

LlOl,

Ll02,

LlO:~

on

the

lowest

fl"uquency.

Multi-frequency

Transmitter

Tuning

,----

.

Trunsm1ttcr

MAXIMUM

FREQUENCY SPREAD

Frequency

Range

(l)

without

center

Luning

I

wi

t11

center

tuning

'

wit

11

canter

tuning

(l

dB

degradation)

25-30

MIIZ

.080

:V!Hz

I

.160

Ill

Hz

.320

11Hz

I

:l0-36

MIIz

.100

MI!z

I

.200

MHZ

.400

MHz

36-42

}!Hz

.120

Mil.-;

.240

M!Iz

.470

MHz

42-50

MHZ

.140

MHz

.2RO

.MHz

.

510

li!Hz

4.

Connect

t!Je

red

plu~

on

the

GE

Test

Set

to

the

Systom

Boord

metering

.Jack,

and

the

black

plug

to

the

Exciter

motoring

jack.

Set

the

polarity

to-:-,

and

set

the

rang-e

to

the

Test

1

position

(1-Volt

position

for

4EX8Kl2)

for

all

ucl,justments.

NOTE:

Witl1

the

Test

Set

connec1

ed

J·o

lhe

PA

metering

,jack,

the

voltr.ge

reading

at

position

"}'"with

the

HIGH

SE~SITIYITY

button

pressed

may

!Je

couverted

to

driver

collector

current

[)y

reading

t!1e

current

as

10

amperes

full

scale.

The

voltage

readinp;

at

position

''G"

witll

the

HIGH

SENSI-

TIVITY

bulton

pressed

may

he

converted

to

PA

ccllector

current

by

reading

the:

current

as

10

ampere;:,

full

scale.

5.

All

adjustments

;u·u

madu

with

the

transmitter

keyed.

Unkey

tile

Lransmittor

between

steps

to

avoid

unnecessary

heating.

STBP

\!ETEH

POSITION

TUNING CONTROL ' METER READING ! PROCEDURE

'

I

l.

o~'

'-"

I

LlOl

I Max.imum

Tune

LlOl

for

maximum

muter

reading.

S\

MOD-l

2.

l~lv'-l

B

Ll02

&

Ll03

~laximum

Tunu

Ll02

and

then

Ll03

for

the

nwximum

meter

readinJ.

>-----

~·

0V~

cI

3.

TlOl

& T

102

See

Procedure

j \ • MULT-1

I

4.

r-s·

Ol,i

D ':S!<-}

.,.

TlOJ,

T

102.

See

Procodux'e

~

\

JULT-2

TlOl

&

Tl04

1 F

l'r

c

~-

Tl05, Tl04,

Soe

Procedure

~~{

\'!ULT-:J

Tl06

&

Tl07

~----

f-

'

--

.

6.

""\~

G

~-;~

lC;]·_,_

TlOtl.

Tl07

~Iaximum

~\)~J

AMPL-1

&

Tl06

c

1'56

--~---+-·-

~----~-

?\

;;

---·-

--·-·-·-.

'--

---

I

1.

Cl<l::l , .lilaximum

I

-11

AMPL-1

/7\

DRIVE

~

I

(on

PA)

R216

L__

Tune

TlOI

for

'

dip

in

meter

re:1ding.

and

then tune

Tl02

for

maximum

meter

reading:.

Tune

Tl03

for

maximum

motor

reading

and

•·o-<Jdju!Oi

Tl

02

ocd

T101

for

maximum

meter

reading.

Then

tunc

Tl04

I.'

or

'

dip

"'

meter

readinp;.

Tune

TlO::~

for

maximum

met

or

rending

and

ro-adj

ust

Tl01

for

maximum

meter

reading.

Then

tunu

Tl06

for

'

dip

in

met

or

reading

and

Tl07

for

maximum

meter

reading.

-·~-~~~---

'

--

T

"me

T108

for

maximum

meter

reading,

and

then

ro-adju::;t

T!07

and

Tl06

for

maximum

meier

reading.

Move

the

black

motering

plu~

tn

the

PO\\·Ur

Amplifier

metering

jack

and

tune

Cl4J

and

Cl56

for

maximum

motor

reading.

Set

Power

Adjust

potentiometer

R216

00

tlw

PA

board

['or

tllo

desired

po·wer

output

(from

15

to

50

Watts).

ALIGNMENT

PROCEDURE

25--50

MHz,

50-WATT

STATION

TRANSMITTER

INTERMITTENT

&

CONTINUOUS

DUTY

Issue

2 9

LBI-4732

TEST

PROCEDURES

These

Test

Procedures

are

designed

to

assist

you

in

servicing

a

transmitter

that

is

operating--but

not

properly.

Problems

encountered

could

be

low

power

output,

tone

and

voice

deviation,

defec-

tive

audio

sensitivity,

and

modulator

adJust

control

set

too

high.

Once

a

de-

feet

is

pin-pointed,

refer

to

the

"Service

Check"

and

the

additional

corrective

meas-

ures

included

in

the

Transmitter

Trouble-

shooting

Procedure.

Before

starting

with

the

Transmitter

Test

Procedures,

be

sure

the

transmitter

is

tuned

and

aligned

to

the

proper

operating

frequency.

1.

Wattmeter

similar

to:

Bird

#

43

Jones

#

711N

4.

Deviation

Meter

(with

a

,75kHz

scale)

similar

to:

Measurements

#

720

TEST

PROCEDURE

TEST

EQUIPMENT REQUIRED

for

test

hookup

as

shown:

2.

VTVM

similar

to:

3.

Audio

Generator

similar

to:

Triplett

#

850

Heath

#

IM-21

5.

Multimeter

similar

to:

GE

Model

4EX6Al0

GE

TEST SET

MODEL

4EX3All,

MODEL

4EX8Kl2

or

20,000

ohms-per-Volt

voltmeter

POWER

MEASUREMENT

1.

Connect

transmitter

output

from

the

antenna

jack

to

the

wattmeter

through

a

50-ohm

coaxial

cable.

Make

sure

the

wattmeter

is

terminated

into

a

50-ohm

load.

2.

Key

the

transmitter

and

check

the

wattmeter

for

the

desired

power

output.

SERVICE

CHECK

Check

the

setting

of

the

Power

Adjust

Control

(R216).

Refer

to

the

QUICK

CHECKS

on

the

Transmitter

Troubleshooting

Procedure.

10

--·-··----

VOICE

DEVIATION

AND

SYMMETRY

TEST

PROCEDURE

1.

Connect

the

test

equipmlent

to

the

transmitter

as

shown.

2.

In

radios

with

Channel

Guard,

set

Channel

Guard

Mod

Adjust

Rl28

for

zero

tone

deviation.

3.

Set

the

audio

generator

frequency

to

1kHz.

A.

In

all

station

combinations

except

Local

Control

Intermittent

Duty

combina-

tions,

set

the

audio

generator

output

to

30

millivolts

RMS.

B.

In

Local

Control

Intermittent

Duty

station

combinations,

set

the

audio

generator

output

to

.1.0

volt

RMS.

4.

Key

the

transmitter

and

adjust

Deviation

Meter

to

carrier

frequency.

5.

Deviation

reading

should

be

±4.5

kHz

in

radios

without

Channel

Guard,

and

±3.75

kHz

in

radios

with

Channel

Guard.

6,

If

necessary,

adjust

MOD

ADJUST

control

Rl27

for

the

proper

deviation

on

plus

(+)

or

minus

(-)

deviation,

whichever

is

greater.

NOTES:

MASTR

II

station

transmitters

are

adjusted

for

4.5

kHz

deviation

at

the

factory.

The

ifactory

adjustment

will

prevent

the

transmitter

from

de-

viating

more

than

5.0

kHz

under

the

worst

conditions

of

frequency,

volt-

age

and

temperature.

7.

If

the

deviation

reading

plus

(+)

or

minus

(-)

differs

by

more

than

0.5

kHz,

recheck

Steps

1

and

2

as

shown

in

the

Transmitter

Alignment

Chart.

TONE

DEVIATION

WITH

CHANNEL

GUARD

TEST

PROCEDURE

l.

Set

up

the

Deviation

Meter

and

monitor

the

output

of

the

transmitter.

2.

Remove

the

1000

Hz

signal

from

the

audio

generator.

3.

Key

the

transmitter

and

check

for

0,75

kHz

deviation.

If

the

reading

is

low

or

high,

adjust

Channel

Guard

MOD

ADJUST

Rl28

for

a

reading

of

0.75

kHz.

NOTES:--

l .

On

units

supplied

with

Channel

Guard,

the

Phase

justed

carefully

to

insure

proper

performance.

mitter

Alignment

Chart).

Modulator

Tuning

should

be

ad-

(Refer

to

Step

l

in

the

Trans-

2.

The

Tone

Deviation

Test

Procedures

should

be

repeated

every

time

the

Tone

Frequency

is

changed.

EXCITER

ASSEMBLY

AN'TENNA

DEVIATION METER

PAASSEMBLV

'''

'

AC

VTVM

CONTINUOUS

DUTY

PA

---·-----··

..

------·----------·

------------

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

-·-·-·-

AUDIO

LO

TO

J11

AUOIO OSCILLATOR AUDIO

HI

TO

J10

GE

TEST

SET

4EX3A

11

4EX6A

10

INTERMITTENT AND CONTINUOUS DUTY

ALL

EXCEPT LOCAL CONTROL

SYSTEM

BOARD

INTERMITTENT DUTY

LOCAL CONTROL

SYSTEM BOARD

I

STEP I • QUICK CHECKS

--

METER

PROBABLE

DEFECTIVE

STAGE

POSITION

HIGH

METER

LOW

METER

ZERO METER

GE

TEST SET

READING

EXCITER

A

Ql02,

10-

QI02,

CVlOl,

ICOM,

QlOl,

UlOl,

LlOl,

(MOD-I)

Volt

LlOl,

10-Volt

Ql02,

CRlOl,

10-Volt

regulator

or

Channel

Selector

switch

ground.

B

Ql04,

10-

Ql03,

Ll02,

Ql03,

Ll02,

CVI02,

Ll03,

(MOD-2)

Volt

Ll03,

CV102, CV103,

CR104,

Ql04

regulator

CV103,

Ql04

c

Ql05,

Ql06

Ql05,

Ql06

Ql05, Ql06,

TlOl

(MULT-I)

TlOl

D

Ql07,

Tl04

TlOl,

Tl02,

TlOl,

Tl02,

Tl03,

QI07,

(MULT-2)

T103,

Ql07

Tl04

F

QlOS,

Tl06

Tl04,

Tl05,

Tl04,

Tl05,

QIOB,

Tl06

(MULT-3)

QlOB

STEP

3

CHECK

AUDIO

AC

VOLTAGES

EQUIPMENT REOUIREC

G

Ql09,

Cl46,

Tl06,

Tl07,

Tl06,

Tl07,

TIOS,

Ql09,

(AMPL-l)

Rl44

TIOB,

Ql09,

Ll04,

Ll07

• AJDIO OSCILLATOR

•

AC

VTVM

LlOS

POWER

AMPLIFIER

"D''

Low

Output

No

output

from

Exciter,

(AMPL-1

DRIVE

from

Exciter

CR201

STEP 4

"C"

Q210

No

Exciter

output,

(AMPL-1

POWER

Q2IO,

Q204,

CR201

AUDIO

a

OSC

WAVEFORMS

EOJIPMON

I

REQJIRED

CONTROL VOLT- • t\UDIO

oJS:'LLATOR

AG~)

•

0551L~os:u~E

"F"

Q202

Q202,

Low

Q202,

Q201,

Check

(OOIVER

Output

from

Pos,D&C

CURRENT)

Q20l

"G"

Q203

Q20l,

Q202,

Q203,

Q202,

Q20l,

(PA

CURRENT)

Q203

Q210

1--8.33

16.67MHi

--+---------

--------

~:-]---''

l_

(~~~

_j----

--

~~T

lougl~z:m~~~~~oR

~----_c:~~-'-''-'-::.:_

___

_

OUTPUT

QC

1.0\'

R"'S

~CfE-

A~

RMS

OR

PEAK

READI~G

VOLT METER

WILL HOM-'

112

TC

II~

oJf

Pl;.A~-

TC'- PEAK

READINGS

SCOPE

SETTING

IOOMV

P-P

46

MV

RMS

1.1

V

P-P

0.36V

RMS

FREOUEN~>

D

VIOUl

1-41

BUFFER

0101

MOD

AMPL-1

0102

MOD

AMPL-2

0103

STEP 2

CHECK

TE~~!~~~

R~~~~~~LTAGES

•--~)>~~~~

~---'---''-"---

• G

~

TEST

MOOEL

4EX3~'1

"

•

2·~',000

01-llot-PER-VOLT

METER

Nl)-[

A~c

DC

RF:AOINGt. TAKEN WITH

~HE

TRAI>:SMITTER

KEYED

~-~·8-417MHZ

MOD

AMPL-3

0104

BUFFER

0105

---

6-Z~~I('

';MHZ

--------4---

MULT-I

TRIPLER

0106

TYPIC,\L

MULT 2 'lE-"'DING AT ,

POS

D

ShC·~LD

BE

0.56V

~-~

I

~'

___

____j

MULT-2

DOUBLER

0107

V-DC

T

fPIC4L

M"JLT

3 READING

AT

p

)$.

F SHGULD

BE

0.45V

l_

______

_j

-~~~-25MKZ------o~------

MULT-3

DOUBLER

OIOB

TYPICAL

MIPl-1

READIN~

AT

POS.

G SHOULD

BE

0.3V

(3E-50MHZ)

I 0.5V

(25-36

Mill)

r~

AMPL-1

0109

qr~

V-DC

IYPICAL

Ar~PL-1

RE~'JINGS

AT

POS.

0

~HGUI

D "

~~

_'\OMHZ

I0.5VI25MHZ)TO

C.45V

{30

MHl)

3C-~6MHZ

0.6V

130MHZITO

'0.5V

136MHL}:::-

36-42

M~Z

0.5V

136MHZITO

~QMHZ

0.4V

142MHZI

,

0.65V142MIIZITO

[

0.5V

ISO

MHZI

25-50

~HZ

------------

AMPL-1

0201

'\ICLTAGf

~VCLTACE

READI~3

X

15

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DRIVER

0202

{PelS

HJN

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PA

0203

l

rA

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(+i

J205-5(-)

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0~

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LBI-4732

J201

'"

TROUBLESHOOTING PROCEDURE

25-50

MHz, 50-WATT STATION TRANSMITTER

INTERMITTENT & CONTINUOUS

DUTY

Issue

l

ll

LBI-4732

EXCITER

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ti-

.

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2,

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:'li

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0

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[ Q201

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~

c

0

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202

203

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IS

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SIDE

(l91l4l7:<7l,

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2,

Hev.

3)

(l9D4l7~J7J,

Sh,

::J,

Rev.

2)

•

(1.9J;•tl7Wi"1,

Sh.

2,

liev.

:;

•

SEE

NOTE I

PER

TRANSISTOR

r

.,±.02

"'

"'"

A201

19D416712P3

INSULATOR

54921:78

P2

SPRING TENSION

WASHER

19AI16023PI

MICA

INSULATOR

A201

19D417513G

I

COVER

NARROW

#4

FL

WASHERS

7140624P6

SPACER

19D416712P3

INSULATOR

BEFORE

SOLDER

#8

(Q201 6

0202

ONLY) 0

#

10

(0203

ONLY)

SECTION

A-A

TYP

MTG

FOR

0201

THRU

0203

4-40

X .312 6

L'WASH

6

NUT

SEE

NOTE I

0

SECTION B-B 0

VIEW

AT"c"

#4

SCREW

#4

L'

WASH

SECTION

0-0

0

0 0

0

J241

0

6-32

X

.250

A201

#6

WITH

NARROW

FL

WASH

4 PLACES

26

PLACES

A203

TO

PLATE

0 0 0

+~

B c

~

E 0201 c

02

RT201

4

~

P201

J201 @

0 0 0 0 0

RT201~~

SEE

NOTE

I

LEAD

ORIENTATION

NOT IMPORTANT

TIGHTENING

TORQUE

TO

BE

WITHIN

35

TO

45

IN.

LBS

19C301208P7

SLEEVI

NG

SEE NOTE I

B

19B219391PI

SEE

DETAIL"E"

FILTER

CASTING

0

.,

0

o;

"'

..

"'

.,

r

C!

RED

Hell

A203

@Gil

0

119C320904G2

PLATE

0

WIRING

ROUTED

THRU

CLAMPS

AS

SHOWN

~--------------------------------------------------~

II

•

#6

NARROW

FL.

WASHER

BOTH SIDES

OF

LOOP

CLIP

('

" " " " n

0 0

ro-.,

r---

-.,

I I c

I I

lo

o I

I I

L

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-:_

__

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0 0

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v v u v v

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I

I I

I

i:

i

I:

i,

i:

I:

I

I'

I:

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I I I I

I I I I I I

I

IV

I:

I

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L

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AT

SINK

n n n

\J

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,.......

I !I

I

I I I

I'

I

I I

L I

v

(l9D423085,

Rev.

0)

" "

v

)

v

#8

WITH

FL.

WASHER

TIGHTEN

TO

15-20

IN.LBS

12

PLACES

LBI-4732

A201-L220

A201-L221

A201

-L222

A201-L223

OETAI

L"E"

(VIEW

OF

A201 WITH

COVER REMOVED)

NOTES:

!.APPLY

SILICONE

GREASE

TO

BOTH

SIDES

OF

MICA INSULATOR

TO

MOUNTING SURFACE

OF

0201

THRU

0203

6 RT201 AND UNPAINTED FLAT

SURFACE OF HEAT SINKS.

NO

GREASE ALLOWED

ON

THE

THREADED PORTION

OF

THE

MTG

STUD.

OUTLINE

DIAGRAM

25--50

MHz,

50-WATT

STATION

TRANSMITTER

CONTINUOUS

DUTY

Issue

1

13

LBI-4732

W241

5491689P104

6 ( 4 PLACES @

"B"

# 4 X

1/4

THO FROM

198201074P204

OUTLINE

DIAGRAM

FRAME

ASSEMBLY

FOR

INTERMITTENT

AND

CONTINUOUS

DUTY

TRANSMITTERS

14

Issue

2

-,

I

__

,

r-+

t

I

t-

I

+

19B226203GI

FRAME

19B226203G2

FRAME

FOR

UHF

At-

·t-

A

r-

---,

+

~I

A+

---

A203

19B226207P2 PLATE

FOR

LOW

BAND

8

HIGH

BAND

+--

I

+

I

+

+-,

+

I

+

I

+

-----,

+

I

L+

-----

---~

6-32

X

.250

( 6

PLAC.ES

@ A l

(

l9D423098,

Rev,

1)

r-.,.1

I I

L-._j

I

W244

5491689PI04

~

•

+

•

SYMBOL

C\Ol

Cl02

ClO:l

Cl04

Cl07

thru

C\0~

CllO

'"'

Clll

Cll2LL

C112L

C112\!

C112R

Cl13

..

,

Cll4

C1l.'i

Cll6

Cll7

lh

""

Cll~

Cl20

Cl21

'"'

Cl2~

Cl23LL

Cl23L

Cl23M

Ct24LL

C124L

Cl24M

Cl~1H

Cl2~LL

Cl~5L

GE

PART

NO.

19A110C55.013

5494-181Pl05

\9A1\~080PlOS

19A:16655P19

4029ll(J:JPI04

402900JP104

54933R7P1000K

b-1J3367l-'IOOOK

HIA~l6655P21

1~AllCO~Ol'IU.'i

54962671'9

19All6~l!Ol'l0t>

549oooer1::m

19Al16080P1

54962191'262

54952191'258

.>496219P2C>7

19A700013Pl5

19A700013P1.9

l9A700013Pl3

l~A700fJUI'1~

5496219P262

M9621!JP25~

PARTS

LIST

LBI1110P

~'\-;\~

MF7

''"'l~n

!f*•I<>M>~<71-<7R

DESCRIPTION

2:"i-30

M'l~

(LL)

:lG-:JO

MH7

i

L)

19D41Ari,->'lG l

P~EQ

l~JJ11H~5~(;:l

L ¥1!0\j

1~D41~R."\%:l

~

rHI~Q

\9D4l665~G4

2

fREQ

%-'1~

M~z

<'~)

-

PSi

K

~2-SO

Mllz

(Ill

19D4166.'i9GC,

FREq

2:,-30

WI~

(U)

190-11665906

FREI)

:JU-36

Mllz

(L_l

HJJ11~~b%7

FHI:Q

:l6-1~

MHz

(

-~)

J(:O'i

K

1nD41AROm>A

F"-FQ

4?-.'\0

\1117

(HJ

CAFACl:ORS

- -

t:~Tamin

olio~

lllOO

rF

:20'f,

ll!lll!

\'lJCW,

f,im

to

~MC

T:fJ><'

.TF

l'i

"''"!'.

c~,.ami~

di"c

170

pf

~2·W,

10<1D

v~r·~:

"'"'to

~MC

Typ~

.rr

l»s~ap.

Cc·?~rnin

~lo~

1000

pF

•20%,

1000

'iJJCW;

c.im

to

~MC

Ty~•e>

Jf

lli"''"l'·

Ce,-amlc

diSc;

330

pF

~20~,

1000

V.lO';

~1m

to

T;'pe

)P

P•sca~.

C<·rarnie

~isc

2700

pi'

:20%,

1000

v~r.w

,(m

I••

~Mr.

'T'ype>

.TR

1!

ocap.

Po1y<>st<>r·

0.047

uF

:_lO'l;,

50

vncw.

Ceramic

disc

1000

uP

:20~.

1000

VDC'III;

sim

to

RMC

Type

.rF 'JI

scop.

3ilver

~~0

pf

!10'%,

.'100 \"DCW,

l!otlve

hpe

nl!-20.

S1lver

m1ca

GBO

pF

!10%,

500

VDC\1',

J!c•t1v~

'fY]Je

DM-20.

~o

Electro

Mica:

1000

p~

±10'1',

~irn

to

Rl~~tro

l!oT've

Tyrc•

0~-20.

Mica:

1000

pF

~10%,

Mw

to

F.lPetro

~ocn·e

Type

OM-20,

Cer~mi•

~;,..

~7011

pP

~~0'},

1000

V~fW:

~~'"

In

RMr

Type

J't

Dhcap

.

Tantalillll:

3.3

uF

±~01,

t5

VDCW;

oi~.

\o

Spra~ue

Typ<?

150Tl.

Polye~ter:

U.IJl"i

~!-'

:':101,

00

1'1JCW.

Silver

rrnca:

330

pF

~10~,

500

i'!JCW.

s1m

to

Electrc

lr!ottv€'

'J'ype

!J.~.-\5.

G.Ol

~rF

:<:20'},

50

'.'JCW.

Ceramic

disc:

91

pF

~51,

5GO

\'~CW,

temp

coef

-HO

PP\1.

Ceramic

di~o·

62

pF

:!;51,

500

VCICW,

temp

coel

~80

PP\1,

Ceramic

d1sc:

56

pF

!5'1.,

500

I'DCli,

tem?

~aef

-f\0

POll!.

C<>l'"-m1r.

dtsc·

4~

pF

:':~'!.

..

'iOO

Vlll'li,

TPml'

O<>Pf

-SO

PPM.

Phenolic:

1.50

pF

~51,

500

".'DCW.

Ph<'Oolio•

],00

pl'

~ii%,

fiOO

I'DCW.

Ph<>nolic·

1.00

pl'

~51,

500

I'DCli.

l'henol~c:

0.82

pF

:<:t>%,

t>OO

I'!JCW.

Ceramic

disc:

91

pF

~5~,

500

VDCW,

tern~

coef

-BO

PPM.

Ceramic

diec:

62

p~

:5%,

t>OO

V!JCW,

t<?mp

coef

-tli

FPIA.-

*COMPONENTS ADDED,

DELETED

OR

CHANGED

BY

PRODUCTION CHANGES

SYMBOL

Ct2DM

Ci2B1L

C'

2f!J.

261'

~1271.L

<'271

C:27M

r.•

27R

~~!.!.•

C

29L•

C:2011•

C13DT.L

Cl3DL

C:

~OM>

c1o

.n

Cl~.~

"'

.

~133

Cl341

CJ:l4M

C13~11

C135L

Cl35ll

Cl35H

Cl3<)L1

Cl361

CJ36M

C13<)H

C137LL

CH7L

GE

PART

NO.

<>491601?134

'•49l5l!li'l24

'9A'IOOO!lP14

J1%2!9:>257

5496219?251

51%21~?244-

\OA70001:1P9

~491C01PIJO

\

9.\7000\

~~7

5491<WP107

1~A'IU001~~~

519G219P251

~4962\f'IP244

l9Al160SilP'

.";4962191'240

"4Hfi2l

~P242

5196219P238

19A7000BPll

5401601P114

19A'/0001JP1~

19A700813J'9

54962191'243

51962191'210

5496219P242

b19G2191'238

549160\Pl

H

51!!1BU.:CP111

DESCRIPTION

CeraTI".lC

d>Sc:

>G

p¥

±5%,

t>OO

l'llC~,

temp

(Oet

~Hu

rn•.

<"'<·r><ml

·

d_h,

-RO

DP\1.

-J:J

pf

~51,

,wu

1-r>cr t,.,,,

,_.,,.r

Phenolic

•

Pt.eno1io

~

....

,,.,]

;,.

r~r"-m1c

0•

-~[)

;>D~.

pF

~5t,

580

VDC'~.

. 8

pf

~5%,

500

'!DCW.

.20

pf

l5~.

'SOO

'.'DCW.

!

('~~'m1'

O>sn·

H:J

pf

!01,

~00

i'~~w.

-'1"P

cnr'f

-80

~'~\!.

Ce~amic

dHc

-RP

PP\1.

r'-""mlc

01sr

-BO

PPI!.

l'ul)'e&ter

56

pF

±51,

500

i'JCW, •,etnp

cue!

r,.,,_,ni

·

11

L7

pP

+01,

:>on

i'~CW,

"""I'

end

-~0

Pl'l!.

n~le>t<o"<l

by

HeV

P.

Ceramic

dHc

33

?F

+51,

500

\'.)(~,

umr

ro~f

-80

PP\l.

Or·l~•ed

by

1\FV

P.

~''''"'"!'·

~•~•'

n

,p

.-,1,

fiOO

·,•;JrW,

tc

..

p

coef

-80

PPI!.

Dole

ed

by

iiEV

f.

r~ralll;''-

dJsc

-8()

L'l'l!,

r>hcnol

ic

·

l~

pf

:_.01,

500

i'DCW,

t<\mp

coef

17

pF

~:,~,

500

\'DCW,

3G

pf

~;;~,

C,OO

\'DCW,

.:1:1

pi'

!l%.

sou

VJJCW.

1P

R~';

ear

I

Phe>nolE

G.27

pf

!5%,

500

v:lCW.

~t-~IWlic

0.27

pF

!5%,

"00

\'Dell.

Phenolio

0.

22

pf

!51.

5CQ \'JCW.

C<•rarnl"

Ot~r·

,17

p<

!ilh,

hOU

\'lJC~.

t~mp

~u~f

-~0

PP\t.

C<>r•rnlc

d1sr,·

3:J

pF

•51

500

i'DCW,

t~mp

coef

-80

P?l!!.

C~r"-'"'"

dcsn

~g

pt

:U'l;,

.'>OU

VlJC~,

t<jmp

noet

-80

P?~.

('('ramlc

d1sc:

15

pF

:S%,

500

\'DCW,

l~mp

coet

-Kl'

??M.

C~nmic

Cisc:

13

pP

~51,

500

VDC~,

t~mp

cod

-80

PPM.

CcroJ:Ji.c

dL~c

9.0

p~

!51,

~nn

VllCW,

~'"!'

co~r

-80

HI>!.

C:"raoh'

d1sc

12

p¥

!~%,

JOO \'Ot'W,

t•,mp

coef

-~0

PPM.

C~U~ic

dJ,g~·

7.0

pP

~5%,

500

VOCW,

1~mp

'OCf

-30

FPM.

Phenolic

0.0~

~I

:b%,

t>UU

\'JLW-

Phenolic

O.Jl

~F

~51,

500

Vlll'~.

P~enoCic·

(1.56

pF

!5%,

500

I'DCW.

Ceramic

di~c·

1~

rl'

:<:C>%,

.'\~~

VOCW,

t~mp

C.'H'f

-BO

PPM.

c~ra:n1c

d1~c:

B.O

vF

~~%,

500

VDCW.

temp

coet

-~0

PPM.

Ceramic

di~•·

-80

PPM.

t2

pF

±5X.

500

vncw.

t•-rrm

"'"'

r

Ceramte

d1se:

7.0

pr

~5%,

500

VDC'!',

temp

coQf

-Rn

PPM.

Ph~nolic·

0

~1

pF

.!;5%, .'500 \'DCW.

l'herrolic:

O.o1

p!

±~'t,

oUO

Vf!CYI.

SYMBOL

('':'7H

{'U~I.I

r'138L

G138M

C'l~8H

C14il

Cl11L1

C141L

C\4\M*

Cl41U

Ci4~LL

C14?J.

Cl12M

Cl42ll

('144

C14~

C'14'3*

Cl1\iLL"

C146L•

Cl15.P

C146H•

C147

Cl4B

Cl50

Clb1

Cl52

thru

Clb~

C\56*

Cl57"

t~ru

c1o:>•

ca:o:

thru

CR:06

CVlOl

t~ru

CV10,0

GE

PART

NO.

3-1~~21!11'240

,'\·196213P238

WJ\L60~01'1U7

1~A11G655n9

>1!JOOO~I'lJ7

54~0008PIJS

-,4HOOORP127

5490008_>12:!

5490QObPJ27

S4~000EP24

~4944S1P105

19AllG080Pl

54962:9P238

1%116656?12J8

19A116606?12.TR

I~A1'!i0ROP\117

549448:Pl05

549G207Pl4

19Al:5080Pl

19A116867Pl

i9All6030Pl

19A11b2b0Pl

5495759.?12

DESCRIPTION

Ph~nol

\c:

39

pF

t51,

500

\'DC~.

Ce>t'"'"

lc

d'

>oc·

-~0

J'-:>M.

1:1

yf'

~~%,

500

VDCW,

temp

coef

Ceramic

dcsc·

9.0

~P :5~.

500

VDCW,

cPrnp

ooe!

-80

P~ll.

Ct!'ami~

diS('

-PO

]>-:>)>!.

12

rF

!~%.

liOO

vncw.

T~mp

"''~f

l'<-rarnic

d1sc·

7.0

~r

-5% .';00

VDCW,

temp

coef

-SO

PPM.

Polyester

0.1

>F

~10'<,

~0

VlCW.

Ceramic

disc·

1000

pF

<20\,

:ooo

vncw;

siC"

to

P.MC

Ty~<?

Jf'

DiScap.

-

8il<'cr

::JiM

\!Hl

pP

•10'1',

,-,oo

V!JCW,

~im

to

~ko·lt'"

M"liv

.. Ty;<>'

niii-l!i.

Sll<•er

'[]lea

82

;'F

01,

500

vnc~·;

stm

to

eet~.--,

\!otlYe

<p~

D\!-15.

Slh-Pr

'''"

1<10

p\'

Ol,

500

Vl'CW,

"-int

(o

t

Pclcn

Mutin•

:ypc

DM-15.

ln

Rl:'.' G &

~arl1er

3ilver

G8

p!'

:':llJ%,

500

VDC~

sim

to

Elf"ctro

Motive'

'!'ypc_'

DM-15.

~ilv<"r

100

p"

~lOt,

500

VDC11,

Bim

to

Electro

~!otil·e

Type

!JM-1.0.

~IJ>·

..

r

.,;,.~

100

p"F

±5'~,

~00

'.'DC11,

~\m

to

~l~clrr;

Motil·c-

Type

OM-l.'i.

8iJ"Je"

011ce·

82

p7

~51,

~00

VDCW

~1m

to

~1ectro

M0tivf"

Typ<"

DM-I!i.

Sil..-f'r

"'''a

82

pF

+C,%,

!"tOr

I'TlC11,

,;,"

t"

~:l~c\m

Motive

Type

lJM-1~.

-

nuver

:ntca·

75

pF

~5%,

500

I'DCW,

sim

to

Electro

Moth"<>

Typ~

OM-15.

Variable

~pprux.

0-bU

pf,

~hO

VDC~;

to

Mc-pco

Rl,.o·lc"

,.???-RWI-OROO~.

CPtam1c

ii,c·

~>30

pl'

~20l,

1000

I'DC~·;

stm

to

Type

JF

IH&cap.

Polyester

0.01

u.t'

!2C%,

.00

YlJC~.

Ceramic

:\!.sc·

7.0

pF

10.25

pF,

500

VDCW,

temp

coef

-80

PPM.

,\dded

b;:

REV

B.

CNarnl<'

'2

pP

,,,'f,

r-,no

vorw;

,,,~,

,,,.,.r

--~D

PPM.

Tlel~tt•d

b)·

REV

B7

Ceramic

:2

pF

t51·,

500

VDCW;

t~:np

coef

dO

PPM.

D~l~C<?d

by

HEV

B7

Ceramic;

C:l

pP

~5~,

Ulll) \·JJCW,

tc:np

coct

-dcl

PPM.

n

..

1,.,,.., "l'

q~v

R.

C'eramtc·

'2

pF

+57.,

BOO

VDCW;

te.~p

coef

-S•)

PPM.

D<

Jete~

by

nnv

n7

Pol;PHIPr

1

""

:':'0%,

!",O

I'~CW.

Ceram1c

1ioc:

330

pF

~20~,

1000

YDC~;

sim

to

~ypc

JP

Discap.

T"'

'"I'""

~~

"" ±:>o%,

15

vncw;

Type

1500.

T,•otal·l:n;

~5

1!?

l20%,

20

VDCW:

Mr.1

to

Sprd.j>Ue

Type

1~00.

('eramc

dH<':

~~0

p¥

:~L'~,

1000

VDCW;

sim

t<r

·:•ypc

IF

Di

Rn~p.

PoJ;,·ester:

01

uF

:20%,

50

VDCl.

l'ariab\•-':

~-5-6

pF,

t60

I'OCW;

Added

~y

REV

ll.

tu

?S-TRIK0-02.

:>olyester:

0.01

uF

~20%,

.~0

VDC11.

Added

by

P.Jll'

C.

DIODES

AliD

P.3CT!FrERS

- -

Silicon,

~ast

recovery,

225

mA,

50

P1V.

Diode,

Sliieon.

SYMBOL

JlOt

Jl

OJ

1101LL

!.I

Oll.

1,1011!

IJOJTT

L102LL

L102L

LHI2.~

L1021T

LlOJL(,

T

'0~!,

Ll03M

1.:~41.1

L1041

Ll04M'

LC04H

Ll05L1

1C05L

llO~M

1105~

1.\06

and

I

'07

L:OB

P902

Q101•

<,(0"1*

!1101

GE

PART

NO.

tn70004DP2

19n2t9374G1

\9A

ll<i~"JP:

19D~lti~35G9

19041

r;r;:;~c;~

7

19D416635G~

l9D416H35Gl

7

:9D416635G!8

19D4tGGJ5G'

l904166.)SG13

\

9A

700000Pl0

19A700000P15

i9A'IQ0000Pl4

7488079P7

,9Ai00000~14

t9,\7ooooor12

C9~700000PJ0

19.~700000P8

19A700000P6

191\1

1533DP1

19A11!"o910Pl

19Al15330P1

1~A11h:l28Pl

19A115JJOP1

19AI15328Pl

UlAllo3B6AP1

19All5329P2

19A700113P57

DESCRIPTION

-

-.JACKS

,",Nn

Ft~cn~~CT.PS

- - - - - -

roonector,

receptacle:

500

VDC

maximum;

sim

-r:o

NT1'F-J058.

Connector,

lnclud~s

Contact,

<"1f'ctnnal;

sim

t.o

l!!~lno

:m-2Afi4.

- - - - - - TRANSFORMERS - -

Cail.

Coi

\.

Coil

Cai

1.

Coil.

r.ol

!.

Cot

I.

Coil.

Coil,

RF:

2.7

1H

2:o~:

~11n

t

...

r ..

rr~,-~

4411-l~K.

Coli,

RF

Co>!,

RF

'lll

:101;

slm

to

J~H<?rs

4411-12K.

'lll

!10~:

S1m

to

.Teff<?tS

4411-lOK.

Coil

llF

1.~

•o!l

10%,

.00

ohms

]}C

res.

max;

to

Jef±ers

4Hl-t0.

COil,

RF:

(.')

u~

+10%;

Slm

to

JeUers

4411-lOK.

Coil,

RP:

1.0

·1H

!10%;

stm

to

.Jrffers

4411-HK.

Coil,

RF·

680

nH

:10%;

·sim

to

Jeffers

4411-6K.

Cot\,

RF

470

nil

:':12%:

~1m

tu

Je!f<?r&

441l-4K.

Cuil,

RF

330

nH

!20%;

~im

to

J~ffHs411-3.

con,

Rf

10

ull

':10%;

sl'"

to

-Jeff<>rs

4~21-7K.

Coil

HF

39

u!l

10%,

J~ffe•s

4422-11.

C

ohms

DC

res.

max;

sim.

t

-----.-

PLU(,~-----------

lncJ10des:

Contact,

<>leetncal

Contact,

c-lcctcical:

pins.

-

~

-'fRANSIS"rORS - - -

~ ~

- - - -

Silicon,

NPN.

In

!lEV C &

earher;

311

I <'On, NPN; ,_; m

to

T)"j1f•

2N.l904.

Sillcoo,

Nl'N.

SiU.con,

NPN.

Slllcun,

NP!I.

~ili'-''-'"•

!'lPN;

~;,

l<>

Typ"

2'<4427.

In

G1, G2,

G5,

G6

of

REV

F &

earlier:

ln

G3,

07

of

REV

H &

eariier:

ln

G1,

GH

!lEV G &

f'nrlier:

Silicon,

NP'I.

-

RESISTORS

-

Composition·

560

ohms

~5't,

1/2

SYMBOL

R103

Rl04

R1Q.~

H107LL

Rt07f,

R107\!

Rl07B

Rl

OR

Rl09

J\110

Rill

J\112

Rll3

Rll4

Rll5

Rll6

Rll7

Rl18

R'1~

Rno

H12:

Rl22L1

Rl22L

Hl22l!!

R122H

H123LL

Hl231,

R123H

Rl24

R127

Rl28

Rl29

Rt30

R131

R1J2

Rl:J3

R1~4

R135

H136

R137

!U3S

Rl39

R140

RJ.41

GE

PART

NO.

19A700106P83

JnA70G\1~1'55

19A700113P35

19A7!l01131'1.7

19A

70011.~P6~

3R77P303J

1~-~7001101'~1

19H00113P91

19.~700113P~l

~R77P474J

3H771'1D4K

19A700113P95

l9A7~01Di':JU

19A

7001131'59

19A700\l31'75

3R77P511,.J

3R77P473J{

19A700!13P57

19A70Cll3P61

3R77P222K

19A700113P59

3R77P51IJ

19A700113P9C>

:lR77P303J

19A700113P91

19A7001J3r~1

19A700113P9~

3R77P~O~.J

!9A700113P91

l~A70011~P9\

19A7001131'91

l9A7001:3P95

19A70lllt:lP63

3R77P431J

:JR77l':J9H

I\IB?.00~5HPI06

19E209358Pl08

19~7Q011~P~fi

1%7001131'59

19A700ll~Z'7t>

:JR77P511J

3R77P473K

l9A700113P57

19A700113P95

19A700ll3P63

19A

700

l13P27

3R77Pl81K

19A700ll3P41

19A700\1~P2:l

1!147_00)J3P3~

DESCRIPTION

Corr.position

6.~!:

ohrnCJ

:~%,

1/·1

w.

Composition

390C

ohms

!_Ill~.

1,12

.,,

Campositlon

1·10

oLms

~"1,

1,12

w.

Col!Lpositlon·

68

ot·rn~

±5%,

:;2

,.

Cu~.posltloo

22Q

ohms

!5~,

"i/2

"·

Cn~_po~ition

lK

ohms

:<:5%.

1/2

"·

Composition·

30K

ohms

!5r,

'I~

CO~-POSitlo~·

l5K

ohms

~5%,

112

Composition:

l.'iK

ohm~

~5%,

l/~

Composition:

\5R

oMm3

±5~,

112

Composition:

470K

ohms

5%

113

w.

~"'"l'"slt.ln>l

0.10

rnegobo

~101,

112

Composition·

22K

ohms

!5~,

1/?

Composition

75

ohms

~5~.

If?-..

Composition

(:omposition

~.3K o~mq

:.'\%,

1/2

"''

510

ohms

~5%,

l/2

~-

Composltlon

1n

"''"''

;:10~.

1/2

~.

Compos1tioo·

560

o~ms

±-~'!:.

1/2

Composttton·

820

o3rr.s

!5'1:,

1/2

Composlllon:

2200

-,hrr.s

!10%,

1/2

Composition·

680

ohm~

:!:S't,

1/2

CuOlpu~lt!ofl:

e>lO

ohms

;1:5%,

1/2

w.

Cnmnosit1on

22ll.

oh:ns

±~'>,

1/2

C=position·

301::

ohcns

~5%,

1/~

Compositlon:

15K

ohms

~5'!,

1/2

w.

CmoposHion:

l5K

ohl!S

~bt,

l/2

Composit\or.·

lSK

ohl!Ls

~5't,

1/2

r.ompGsiClOn:

30K

oh~s

!-5'l;,

l/2

Composition:

1.5K nhm>;

:+:C>'l.,

1/2

w.

Compon

non:

15K

obrns

~~%.

i

/2

C'ornpooitwn:

lt>K

otma

~~t,

1/2

"·

ComDosltton·

2~:'

ohms~~$,

1/2

Compositloo:

lK

ohms

~5~.

1/2

w.

Coonpns1

tion

39G

obms

~tO%,

1,12

"'

Vnri~ble,

~arten

f1lm:

~pprox

300

to

JCK

ohms

:+:10%,

1/4

w;

lu

c·rs

T~pe

X-20\.

Variable,

carhun

fl1m

~,,,

.

.,,

2K

tD

fillK

ohms

!10\,

1/~

w;

s\m

to

CTS

Type

X-20\.

Cornpu~lllon:

75

ol1ms

!:~%.

1/2

w.

Compositl.on

680

ohm~

~!".'!'.

1/2

w.

ComposH~on

3.3K

obrns

~5%,

1(2

w.

C011tpo~ttion

510

ohms

±b't,

l/2

w.

Compositioo·

47K

ohm~

::1()%,

l/2

w.

Composition:

560

ohms

!5%,

1/2

w.

ComposiC1on:

22K

ohms

!5$,

1/2

Composition·

1K

ohm~

~5%,

1/2

Composition:

~~

otlms

!5%,

1/2

Composition:

\RO ohm>:

~to%,

1/2

Composition-:

120

ohms

~5%,

I/~

w.

Composition:

22

ohms

!5'l;,

1/2

CompositioJJ:

68

nl'""'

t5'l;,

~/2

w.

SYMBOL

R:

12

R14~l.l.

!11

l~l

R 13M

13H

-1·11!.

~J441

~144M

H1-Jo!H

R\H

tbr<l

R150

Rl

01

R1

52

H153

and

H151

TI011L

Hl01L

TIIJJM

T10111

T102Ll

Tl02L

Tl02M

T102H

TI03J,I

'l'lOOL

T103M

Tl03H

no~·.;.•

')'1041•

Tl04l!!*

GE

PART

NO.

19A700\l:JP23

:JR771'101K

19A7001Hl'~'l

''lA"/00l1~Pl9

l9~70il11

:w1

~

19~'/00!lJJ--2;

1'J~'I00t13Yl5

10A700ll:ll'~Y

\9A7~0113PJ07

1~A?00113P99

1~A'i00

l t

1P63

10A7notJ:lrJ~,

1Ciil700113P83

\9!)416635GlG

lf!D416635G10

54~3185P13

19D4

t

6635G2

5493185Pl3

1~0416H35Gl1

191)1166~5G3

b19J:doi'1J

19DH6635G3

l904!6635G12

S'1!J:llH5Pl.l

19D416635<14

.'5493185Pl3

l9U41~63~U\9

19D418G35G13

:->4-9~1

B~PJ

3

19D41rm~~G20

19D1l663~tG13

549:JlH5Pl:J

19!l4C6635G21

l9D416635G5

54931851'13

DESCRIPTION

.

Compo>ltlon;

22

or.m~

~5~,

1/~

w.

l'<>mr()sitiono

100

ohm~

!:o~.

1/2

~nmpCJs\Hon:

'l2

ohms

~0~,

1/2

w.

Cornon~iti.an~

d~

ohm~±~~.

1;2

Cornpo5Ltloo;

1~

ohms

!51.

1/2

Corn~OSllLUJ+

\5

uhffi,;

":J~,

iZ

Composct~oo:·

18

onrn~

±0i,

i?.

Com~osltlo"\:

10

ohm~

~51,

1/2

C'ompo~i

tl

""I'

Compositio{

Ce>rnfC51,lO~:

10

0hms

~5%,

1/2

(''-""""~

r;o•(

lK

ohms

!b~.

112

l

C'ni\.

h<·

['"!~~

Tuning

s1u)j,'

C'>ll.

lr.c.'.~uaes:

Tuning

~luj).

Co1l.

runing

Tuning

t:oil.

Coil.

Inc

iud<>s·

slu~.

l

lnejutle&:

:::i~Qps:

;,j~des

Co\

I.

lrH'

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390

330

270 270

C220

330

270

180

C221

330

270

180

C222

1000 1000

680

r---~224

500

430

360

C225

500

430

360

C226

200

240

22C

180

C235

210 210 220 180

C236

22C 150 100 150

C237

220

150

100 100

C250

100

150 100

C258 100

C259

100

C260

91

68

56

5I

C261

110

91

68

56

C262

15

13

12.

10

C263

140

110

91

82

C264

120

100

82

75

C265

91

68

56

5I

R201

10

20

R202

5.6 5.6 2 1

1.2

R203

56

5.6

2.7

1.2

R204

5.6 5.6

2.1

1.2

R207

C280

6.8U

C281

6.8U

XIOIT

r.;;-

---

--

--,

0

LBI-4732

I

TO

J910

OH

SYSTEIIIS

BOIUtD

IW904)

; :

J200}

>---+J207

ANT

~--------------1.J----}J203

TO

AHT

SEE

NOTE

2

J202

TO

fiCVIt

r-----------------~sE=E~~==~.--~

c

VOLTAGE

READINGS

VOLTAGE READINGS

ARE

TYPICAL

READINGS

MADE

WITH

THE

TRANSMITTER

KEYED,

AND

MEASURED

WITH

A

20,000

OHMS-PER-VOLT

METER

WITH

REFERENCE

TO

A-

AND

NOT

CHASSIS

GROuND.

AN

RF

CHOKE

125-50

MICROHENRYSI

IS

USED

IN

THE

HOT

METER

LEAD

TO

AVOID

OETUNING

RF

CIRCUITS.

NOTE: READINGS

AT

Q20t

COLLECTOR

AND

IN THE POWER

CC:WTROL

CIRCUIT

WERE

TAKEN

WITH

TH£ TRANSNITTER ADJUSTED

FOR

50

WATTS OUTPUT. THESE READINGS

WILL

VARY

DEF'EJIIOIHG

CJif

THE

SETTING

OF

POWER

ADJUST

CONTROL

R216.

PA

ASSEMBLY

REV

HEAT

SINK

ASM

REV

l

TR

l

TR

t9C321395GI

A

"'"'

t9C32129:5G2 A

....

C<(

19821968861

Z><

19C321295

63

A

..

u

.....

~

..

19C321295G4

•

19C321295

69

•

19C321295GIO

•

198219688613

19C32129!5811 •

19C32129!5612 I

J208

SHIELD

OF

W904

NOTE: CHANGES TO

THIS

DIAG

.

MAY

AFFECT 19R622108.

IN ORDEII

TO

IIETAIN RATED EQUIPMENT

P'EIIIFOIIMANCI£.

tfii[P'LACEMENT

OF

ANY

SERVICE

PA.IfT

SHOULD

5E

WADE

ONLY

WlTH

A

COMPONEHT

HAVIIiiG

THE

SPECIFICATIONS

SHOWff

C.

THE

PAIIHS

L~T

FQIII

THAT

PART

NOTES:

L

CAL.LEO

FOJt

ON

~LI9C3ZI29S.

Z..SOQ

MICRO

STRIP,

PART

OF

PWil

l.

.JJ.-INOICATES

A-

*

-INDICATES

VEHICLE

GROUND

CPNT.

80.

ASM

REV

FREQ.

RANGIE

LTR

19041796861

0

25-30

IlHZ

:19D4179H62

c

3Q

...

IlHZ

19D41~63

E

36-42

IlHZ

19041796184

,

42-50

IlHZ

190417968

cu

D

25-30

IlHZ

190417968

G2 c

30-38

MHZ

190417H8

G3 F

36-42

MHZ

19D4179UCi4

F

42-50

MHZ

SCHEMATIC

DIAGRAM

25--50

MHz, 50-WATT STATION

POWER

AMPLIFIER

19C321295Gl-G4

Issue

4

17

•

LBI-4732

SYMBOL

C2AO

""'

C281

1.295

..

,

L296

Q201

Q202

Q203

Q210

RT201

C201

C202

C203

C204

C205LL

C205L.

C2051d

C205H

C206

C207LL

C207J,

C207M

C207H

C208LL

C208L

..

,

C208M

C208H

C209LL

C209L

C209M

C209H

GE

PART

NO.

19A134202Pl5

1911.

12935flP1

19A116965Pl

19A1168:J9P2

19-~116839P3

19All6375Pl

19A129379G1

19A116080P101

1%116655P19

19A116080P101

19A116655P23

19A700105P36

19A700105P44

19A700105P46

7489162P41

741'\AHl2P~9

19A700105P46

19A700105P44

7489162P39

19A700105P46

HIA700105PH

7489162P41

19A700105P46

:9A71J0105P46

19A700105P46

PARTS

LIST

'-'BI4897B

25-50

IlHz,

50

li'A'::r

POW:;:R

AMPLIFIER

19C321295Gl

G4

19C321295G9

G12

DESCRIPTION

19C321295G1,

G9

25-30

l!Hz

19Cl21295G2

010

~0-36

MHz

19C321295G3,

Gll

36-12

l!Hz

!9C321295G4,

Gl1

42-50

M!Iz

(Li..)

(C)

,,,

(ll)

-

REV

B

-CAPACITORS - - - - - - - -

Tantalum:

6.B

uF

,!:20't,

35

VDCW.

- - - - - - - INDUCTORS - - - - - - - - - -

Cot

1.

---

TRANS!STO~S

---------

S1\1cor_,

NPN.

S1J1cor,

NP~.

Sillc<>n,

NPN.

Silicon,

PNP.

----------THERMISTO:\S - - - - - - -

Thermistor:

40:{

ohms

+-20':1;,

color

code

white;

~im

to

Ca,-borundurn

Type

M0806J-5.

POWER

AMPLIFIER

BOARD

:9041796801

25-SO

MO!z

:IJD117968G~

~0-~6

M:l.z

:90417968G3

36-42

M'!z

~9041796804

42-50

MHZ-

REV

F

CA!'ACITOR01 - -

Poly

..

stpr·

0.01

uF

,!:Hl'i,

50

von;,

Ceramic

d~sc:

1000

pF

~20%,

1000

VDCW;

sim

to

RMC

Type

JF

'liscap.

Polyest

..

r

0.01

uF

~10'>,

50

VOCW.

Ceramlc

disc:

3900

pF

~20'1',

1000

VDCW;

sim

to

RMC

Type

JF

Jts~ap.

Miea:

120

pF

!5%,

GOO

I'DC'IL

Mica:

120

pF

-!;5%,

500

YDCW.

Mica:

120

pJ<'

;!:5%,

500

VDCII.

Miea

·

220

pF

:!:5$,

5CO

VDCW.

Mica·

~70

pF

!!'i%,

C>C•O

VDC'Ii'.

Silver

mica:

390

pF

:!:5$,

500

VDC\l';

slm

to

Sprag,,.,.

Type

118.

Silv"r

mi""

330

pF

,!:51,

.~00

YOCW;

~lm

"'

Sp:r-a(Pe

Type

118.

Mica·

270

pF

,!::5%,

500

VDCW.

I!

lea;

220

pF

!5%,

500

VDCII.

Silver

mica:

330

pF

,!::5%,

500

VDC'II;

sim

7.o

Sprague

Type

118.

lr!ica

270

pF

,!:5%,

.~00

VDCW.

Mica:

220

pF

:!:5$,

500

VDCII'.

S1lver

mica·

390

pF

!5't,

500

VDCII;

"'lm

to

Sprague

Type

118.

Mica:

270

pF

,!::5%,

500

VDCJI.

Mica

:

270

pP

!5%,

c.oo

vnr.w.

Mtca:

~nn

pP

!5't,

c;oo I'DCW.

*COMPONENTS ADDED,

DELETED

OR

CHANGED

BY

PRODUCTION CHANGES

18

SYMBOL

C21JL

ond

C21

J>.l

("21

0!!

C211

l":J12

C21.l!.

C:ll3M

and

C211H

C214J,J,

o

nd

C214!.

(:214M

C214H

C215I.L

'"'

C2J

5L

C21

~M

C21 5H

C216

C217LL

""'

C2171~

C217M

C217E

c:HH!.L

C218L

C218M

"''

C218E

C2HH.L

C219L

C219!i

"""

c~u;u

C:J~I)J,

""'

(;2?.0W

C220H

C221

LL

C22tL

e.n.d

C221M

C221H

r:nnl.

i?.:ld

C2221

C222.~

'"'

C~:l~H

C223

("?~41

I

'"'

C224!

C2241!

C221H

GE

PART

NO.

7-18Jl6?P:J9

19

A

700

1ot'•l'41

10.!1116GilOP107

519626

11'13

19AJ166.5~!'19

l9All665~PJ

7

19A11665SP56JO

19A1166t>Cil'4'/,J

r,

l9A

11665SP3GJO

19A

116656P56.10

19A1161i.'iHP47.!0

19All6655I•39JO

J9A11608JP107

74B9162P39

19A700105P44

19.47001051'41

748GI62P38

19A700105r46

741\9162P41

74K916~~39

13A700105P46

7189t6:<P39

1~A70010~~46

19A70010~1'41

74891621'39

19A70010JP46

19 A

'/UO

1().~1'41

1'1~11fifi5~PI9

19A

116655P1

7

l[!All6080Pl07

19A

116f\7~P~il(),1

19A700015P41

19!1

700015P12

DESCRIPTION

Silver

.'llica·

330

pF

!5%,

500

VDCW;

slr•

~"

Sprague

'ryp1•

!Ill.

M:c•:

:no

pi'

~5'1;,

500

vvcw.

M1ca:

180

pF

~5%,

500

VDCJI.

Polyceter:

.1

uF

2:10%,

5·1

VDCW.

l'antaluT.:

6.~

u,,.

±~n%,

:05

VOCW;

aim

to

Sprague

Type

1500.

Ceramic

disc:

1000

pF

:':20%.

1000

I'DCW;

s1m

:o

RI!C

Type

,JF

D~scap.

Ceramic

disc:

680

pF

,!:2C%,

1000

VDCW;

slm

to

RMC

Type

JF

Di.soap.

Ceramic

cti.,;c:

.~6

pF

-!;5'1:,

500

VCCW;

temp

coef

0

PPM.

(:Pramic

di~c:

47

pF

"!;-~'t,

.~00

VIJCW;

temp

coe!

0 PPM.

Ceramic

d1sc:

39

pF

:!:5%,

500

I'CCW,

temp

~oef

0 PPM.

C<eramic

difw:

56

pF -!;51,

500

VCCW;

temp

coef

0 PPM.

CPr>tm~r-

ctisc

47

pF

:~;.~'t,

-~00

I'IICW;

temp

coef

0 PPM.

Ceramic

<:lise·

39

pF

;!:5%,

500

I'DCW, tE'mp

co~f

0 PPM.

Polyest8r:

0.1

uF :t:10%,

50

VDCW.

Silver

mica'

330

pf

~5%,

500

VCCii;

s~m

to

Sprague-

Type

118,

\Ilea

220

pF

!;5~,

500

VDCIV,

Mica

180

pF

!B't,

500

YIJCW.

~ilver

~90

pf

!5%,

~00

VDCW;

to

Spragu"

Type

118.

SUver

mica·

330

pf

,!::5%,

500

V!lCW;

sim

to

~pr,_g,,.

Tyr"'

118.

llica·

270

pF

_1_5%,

500

I'DCW.

Sliver

mira

390

pF

:!:~%.

5()0 I'DC'II';

to

Sprague

Type

118,

Sliver

mica

CJ:>O

p~·

!;5%, 5()0

VDCII';

sim

to

Sprague

Type

118.

llica

270

pF

,!:5't,

500

V!.:CW.

Silver

mica·

330

pF

0

,!:5i,

500

VDCII";

sim

to

Sprague

Type

118.

Mica

~70

pf'

,!::5%,

500

\'L~C\1.

Mica

lSO

pP

:!:G%,

GOO

\'DCW.

Silver

mica:

3~0

pP

_!:5%,

.500 \'DCW;

sim

w

~prague

Type

118.

Mi ''"-

270

pF

.!::-~'>,

~00

VDCW.

~jca

180

pf'

~5%,

5CO

VDCW.

Ceramic

disc·

1000

pF

~20%,

1000

vncw;

sim

to

RMC

Type

JF

Discup.

Ceramic

disc:

680

t>F

~20%,

1-JOO

I'DCW:

si.m

to

RMC

Type

JF

lliscap.

?olyester

0.1

uF

!10%,

50

VDCI'I.

Silver

Mica:

500

pF

_!:5%,

25C·

VDCW.

Metalli7.ed

teflon:

130

pF 2:5%,

250

·mew.

ll<'tal1i?.cd

tdlnn;

360

pF

!5%,

250

".'DCll'.

SYMBOL

C225LL

""'

C225J,

C22~fi

C2~6LL

C226!,

C226M

C226H

C230

C231

C232

C23J

C234

C235:_.L

'"'

C235L

C236LL

C236L

C2.1fllt

C236H

C~:J'/LL

C237L

C237M

'"'

C2~7H

C238

""'

C239

C240

C241

'"'

C2~2

C211

thru

C246

C248

C250

C250ll

""'

C250H

C251

thru

C253

C255

thru

C257

C358LL

C259LL

C260LL'"

GE

PART

NO.

lYAll6b7Y?51JO,

19A700015P44

19A700015;'42

19A7()()01:>,•36

J9n00015?38

19.~700015?~7

19A700015P35

19.~

116655~23

19H160807103

19A116655P23

19.~

116080P103

5496267H3

19A700105P16

19A700_05P/.4

19.~700105P41

19A1161356P220J

4

19All6656PJ50H

19~

11116Fi6P100.Tl

19Al16656Pl

5Q,J

1

l~M116606

~220J

4

19Al16656P150Jl

19A1113656P1

OOJ1

19.UII3655P19

19A

1lf\080Pl01

19.~

11661'5['17

19A

116080P

101

19A116080PlO:J

19A115680P1

19A

116656PlOOJ

1

19All66~6P150J

1

19A116655Pl9

191Lll66Jti'?19

19.~

1

166S!i?1

OOK4

19.~1166561'1

OOK·l

19A1166G61'91J2

19A

l166~6P82.J:

DESCRIPTION

st

1

v<:>r

Mlca

·

500

pF

,!:5'1-,

?50

vr;cw.

M8talli7.<ed

teflon:

430

pf

,!:5't,

2.50 VDCll.

Mdalli,;ed

teflon:

360

pF

!5't,

250

VDCW.

Teflon/Mica:

200

pF

:;5%,

250

VD2W.

':'eflon/Mica:

?40

pF

!:~'!..

250

VDCW.

T~f

!on/Mica:

220

pF

~5%.

250

\'D:C\1.

T~flon/Mlca:

180

pF

~~~.

250

VDCW.

Ceram1c

disc·

~900

pF

+21~,

JOOJ

VDCW;

sim

to

RMC

Type

~F

Oiscap.

-

h>lyester·

0.022

uF

!10%,

50

1-'DCW.

Ceram1c

disc:

l900

pF

+20%,

!COO

VDCW;

sim

to

Rl!C

'type

,'F

Iliscap.

-

Polyester:

0.022

uF

:!;18%,

50

VDCW.

l'~ntalum:

2.2

'IF

!20%,

20

VDCI'i;

Type

150J.

Mica:

270

pF

!5%,

500

VDCW.

Mi

CR

·

220

pF

:5'l,

500

VDCll',

Mica:

lBO

pl'

.'.5%,

500

VDCW.

to

Sp:r-agu"

Ceramic

jisc:

220

pF

!5%,

500

VDCW;

te:np

cocof

-470

PPM.

C<eramlc

jisc:

150

pF

,!::5%,

500

VDCW,

te:np

cod

-150

PPM.

c.,ramic

:lise:

100

pF

,!::5%,

500

VDCW,

te:np

coet

-150

PI-'M.

Ceramic

jisc·

150

pf

!5%,

FiOO

VflCill,

lF·np

<·o..-r

-150

PPM.

Ceramic

disc:

220

pF

,!::5%,

500

VDCI'I;

te'llp

co!"f

-170

PPM.

Ceramic

disc:

150

pl- :':5%,

500

V!JCW,

te11p

CO<Jf

-150

PPM.

Ceramic

::lise:

100

pF

±5%,

500

YOCW,

t<"mp

co,,r

-1.~0

PPM.

Ceramic

disc·

1000

J'F 2:20'l.,

1000

VDCW;

»1m

to

RMC

Type

JF

Disc:ap.

Polyester

0.01

·~F

~lJ't,

50

VDCW.

Ceramic

d

sc:

380

pF

:t:20't,

1000

VDCI;;

sim

UJ

HMC

Type

JF

[)iscap.

Poly.-,;t"r

0.01

uf

!lD't,

50

VDCW.

Polyester:

0.022

uF

:;10%,

50

VDCW.

Electrolytic:

.~0

w?

+150%

-10%,

25

·mew;

si~.

1:0

Mallon

Type

TTX.

Ceramic

disc:

100

pF

:!:5%,

51JIJ

VIJCW,

temp

''""f

-150

?PM.

Ceramic

disc:

150

pP

!5%,

500

VDCW,

temp

co<•f

-1

BO

:>PI!.

Ce:-am>t

rllsc·

1000

pF

!~O'f,

1000

VDCW;

~lm

fo

rutC

Type

.)F

Ji.~('ap.

Ce,-amic

disc:

1000

pF

~20%,

1000

VOCW;

sim

to

RMC

Type

:F

Dlscap.

Ceramic

disc:

100

pF

-!;101, 5()0 I'DCW, t"?mp

coef

-470

PPM.

Ceramic

disc:

100

pF

!10%,

500

VOCW,

temp

C'"''

-470

PPl!.

C<>ramic

jisc:

91

pP

!5%,

500

VDCW;

temp

cocf

-220

PPM.

111

19D417968G1

of

REV.~

and

earlier:

Ceramic

::!lsc:

82

pF.

2:~%,

500

VOCW,

temp

coet

-150

PPM.

SYMBOL

C260L

C260M

C260H

C261LL

C261L

C261M

C26JIJ

C262LI..

C~62L

C262M

C2621!

C263k,

C262L

C263M

C26311

C284LL

C264L

C264M

C264H

C265L!,*

C265L

C265M

C265H

C270

•"'

C271

C272

C273

C274

CR201*

CR202

thru

CR205

,J201

I

bru

.J203

J205

J206

"n,J

J207

,1208

GE

PART

NO.

19All665~1-'i:i~Jl

19All6656P56Jl

19A

116656P51J

1

19A7000l[;P30

19A700015P28

18A700015P25

19A'IOUU151'23

19A

1166~6!>13Jl

19A

1166.36Pl2.Jl

19A116656P10J1

19A116679Pl40J

19A700015P30

111A700Ut5P~~

19A700015P27

19A700015P3:

19A700015P29

19A700015P27

19A700015P36

HlA

1166.%P9'

.12

19A

ll665!iP82.11

l9Al

tli656P68,Jl

19A116656P56Jl

19A11EI356P51Jl

19A116080P101

19Al16655P23

19.~11

E080Pl

03

19All6655P19

19A116052P~

19A115350Pl

19Al15250P1

19A700049P2

J

9B219371GJ

19C317957P1

19A116651P1

1

9Al34263P2

4033513P4

DESCRIPTION

Ceram1c

d1sc:

68

pF

~~%,

500

VDCW,

temp

coef

-150

PPM.

Cerami~

disc:

56

pP

~5%,

500

VDCW;

temp

coef

-150

PPM.

Ceramic

di

~c:

51

pF

~5~,

500

VDCW;

temp

coer

-lC•fl

PPM.

silver

mica·

110

pP

!5%,

25C

vncw.

Teflon/Mica:

91

pF

.!_5%.

250

VDCW.

SUvcr

mica:

68

pF

.!::5~,

~50

VllCI/.

TE'flon/Mica·

56

pP

,!::5~,

250

VDCW.

CenrFi"

rlisr·

1.~

pF

!5%,

500

VOCW,

temp

"oef

-150

pp],j,

c

..

ran:lc

disc

12

rF

~5%,

500

vrncw,

t~mp

~-C'"f

·150

PPM.

Cerall'_ic

disc

1~

~F

~5%,

51JO

VDCW;

temp

coef

-150

PPM.

Cerarr.ic

di~C'

10

~F

~5%,

500

VDCW;

tomp

cocf

-1.~0

"PPM.

Si.lv~r

Mk·.a·

140

pP

,!::5%,

250

VDCIV.

Silver

mica:

110

pF

!:5%,

250

VDCll.

Tetlon/lllica:

91

pP

-!;5%,

250

VDCW.

Sii>"er

mica:

82

pF

,!::5$,

250

VDCW.

Teflon/Mica:

120

pf

!5%,

250

VDCW.

Teflon/Mica:

100

pF

~5%,

250

I'OCW.

Silv<•r

mica'

83

pP

±5%,

~50

VDCII'.

'::eflon/Mica:

75

pf

~5%,

2~0

VDCW.

C>'ram1~.

d1~c·

91

pF

,!::5%,

500

VDCW;

tecp

coef

-220

PPM.

Cn

19D417968Gl

of

REV

A

and

earlter:

f:<>climi"

rlisf"

-150

PPI!.

fl2

pF

.!:-'i%,

500

VDCW,

temp

coef

Ceramic

disc·

68

pF

,!::5$,

500

VDCW,

tPr>p

roPf

-150

PPI!.

Ceramic

disc:

56

pt'

::.<t,

500

\'DCW;

tecp

coef

-150

PPII.

Ceramic

disc:

51

pF

!5%,

500

VDCW;

temp

coef

-150

PP!d.

Polyester:

0.01

uP

~10%,

SO

VDCW.

Ceramic

disc·

3900

pr

+70%,

1fl00

VDCW;

slm

lo

RMC

Type

JF

Discap.

-

Polyester:

0.022

uF

~10'!:,

50

VDC'II.

Ceramic

disc:

100~

pr

!;?.1''1'-,

1000

VDCW;

~im

l.o

RMC

Type

JF

Discap.

DIODES

AND

RECTIFIERS

- - - - - -

Si:icon,

fast

rPccn•ery;

slm

to

Hewlett

l'ackard

~082-28:1.

Earlier

than

REV

A:

Sillcou,

fa~t

rer.1wery,

225

mA,

50

PIV.

St:l~on,

fast

reco<•ery,

225

mA,

50

PTV.

- - - - - JACKS

AND

RECEPTACLES ---

Connector,

receptacle;

500

VDC'II'

m~xlrnum;

sirn

to

NTU-10!'>8.

Ccnnf'~.tor,

lnr:Oldf'S'

Shell.

Contact,

electrical.

Cont~ct,

clcctrlNr.l•

sim

to

Selectro

:<<!9-1071.

Conhct,

ele~t:r-ical·

~im

t.r>

RP><l

ChJLJn

1.9~-3.

SYMBOL

K201

L201LL

L20lL

L~OI_~

L201H

L202!,L

L202L

L202~

1.2021!

!.204

L305LL

and

L205L

!.205M

L205H

L206J.L

L206L

L?.06M

!,20~H

L207

L208LL

and

L208L

L208!-'

~·'

L208H

L209LL

L209L

""'

L209!1

L209H

L210LL

l-2101.

[,?.101-'

L2ll

L212LL

..

,

L212L

L212M

.,,

L2!2H

L213LJ.

L211L

L213M

L21

3H

L214LL

L214L

L211J,I

L2HH

L22JLL

L220L

J,22·JM

L~~Oli

GE

PART

NO.

"9P.7000i)l?l

1~~-129317P2

J GA12934-'/P1

1'JA129347P3

1~~-l29~~2P9

19~.129351P1

19P.l29352l-'8

19P.l29352P7

19~_700000P122

1J.'.700000I'6

13A129:151P2

19Al29352Pl

1

J,\

1293521'1

19~

129~.'i2P3

13P.l29318P2

l!JA700000f'122

1GA129349P1

JM.129349P2

:9A12935SP1

;8A129352P4

19Al29352P2

19A

129J58Pl

l9/,129359P1

19Al29357P1

1BA

139357n

l9A700000P122

19/,12931gP1

J9AJ29349P2

19Al2~351P1

19Al3\l~5~1'~

l9Al29~5Fil'3

1RA129.'J.~lP•1

19A12935~PJ

19A12D255P5

19A129~~2P10

19A129~1)0P9

19Al29360P6

10A129360P4

19A129360Pl

19Al29J60Pl0

DESCRIPTION

RELAYS - - - - - - - -

Hermetic

sealed:

180

to

341

ohm~

Goil

res,

8-16.3

-,,DC;

~im

to

GE

3SAV1760A2,

CP

Clan•

f!fW-1201558.

Pott<'r-Bnm!leld

HCMbJQ(j.

INCDCTORS - - - - - - - - - -

Coil.

:'nil.

Coil.

C<nl.

Col

l.

Coil.

Co;J,

RF;

8.2

t:ll

_1_10%;

to

Jeffers

4422-:W.

Coil,

RF: .)3[) r.H -f:20'>;

~im

to

Jeffers

111-3.

Coil.

Coi

I.

Coi.l.

Coil.

Coil,

Rf:

8.2

ul!

,!:10'>;

sim

:a

Jeffers

4422-31:.

Coil,

Col

1.

Coil.

Co11.

Coil.

Coil,

Coil.

Coi

1.

Coil.

Coil,

RF

8.2

ul!

2:10%;

sim

to

Jeffers

4422-3K,

Coi

1.

Coi

1.

Co:ll.

Coil.

Coi

1.

Coi

\.

Coi

1.

SYMBOL

L221L

L221M

1.221H

'L222LL

L222L

L222M

L2~2H

L223LL

L223L

L223M

L223H

L224

L225

""'

L226

Q204

Q205

thru

Q207

Q208

Q209

R201LL

..

,

R201L

R201M

'""

R201H

R202LL

""'

R202L

R202M

R302H

R203LL

..,

R20~1.

R203M

R203H

R204LL

""'

R204L

R204M

R204H

R205

R206

R207

R208

R209

R~lO

R21l

R212

R213

R2J4

R215

R216

R217

R218

R2:9

R220

GE

PART

NO.

19Al29360P7

19Al29~601'3

19Al29360P2

19A129360Pll

19A129360P8

19A1293601'5

19A I

29.160P~

19A129360P9

19A

129360P6

19A129360P4

19Al29360Pl

19A71lOOOOP17

19A129346G~

19Al15910Pl

19Al1~768Pl

i9Al15910Pl

19Al29187Pl

19A700113P:5

3R77P.:.l00J

19A700li2P9

t

9A

700112P1

7147161P22

19A'700112P9

19A700112Pi

7147161P22

19A700112P9

l9A700112P1

7147161P22

3H78P200J

19A700113Pl

:9A700112Pl5

19A700106P91

l9A700106P83

l9A'/00106P39

19Al1627fiP~~i3

19At16278P217

19A116278P261

l9Al16278P269

19Al16278P26i

19All6559Pl02

19A

7001

061'59

19A70010AP57

19A700106P69

19A7001

!3P55

DESCRIPTION

Coil.

Coli.

Coi

1.

Coli.

Coi

1.

Coil.

Col

I.

Coil.

Coli,

RF:

~.3

ufl

!10%;

s\m

tu

Jeffers

4121-1K.

Coil.

-TRANSISTORS ---------

Silicon,

NPN;

stm

to

TypP

21>:'1904.

Silicon,

PNP;

sim

to

Type

21'3702.

S1!1con,

NPN;

~1m

to

Type

21<3904.

S1licon,

PNP.

- - - - - - - - -

EES!STORS

- - - - - - - - - -

Composition:

tO

ohms

!5%,

1/2

w.

Composition:

20

ohms

!5%,

1/2

w.

Compos:t:tiou·

~-~ohm~:~%.

1

w.

Composition·

2.7

ohms

,!::5%,

1

w.

Composition·

t.2

ohms

~5%,

1/2

w.

Composition

5.6

ohms

::5%, t

w.

Composition:

2.7

ohms

,!:51·, 1

w.

Composition:

1.2

ot>ms

!5%,

1/2

Composition:

5.6

ohms

!0%,

1 w.

Co11posltion:

2.7

ohms

~5%,

1

w.

Composition:

1.2

o~ms

!5%,

1/2

w.

Compositior.:

20

otuns

2:5%,

500

VOC\1',

1

w.

Composl.tlor.:

2.7

o!lms

-!;5%,

1/2

Compostttor.·

10

ohms

:!:5%, 1

w.

Composition:

15K

ohms

:':5'l,

1/4

Composition·

6.8K

ohms

~5'1;,

l/1

w.

Composltior,

100

ohms

.';:5%,

1/4

1/"Pial

f!lm

2150

ollm~

~2%,

1/2

l!etal

:"ilm:

1470

ohms

,!::2%,

1/2

l!etal

!ilm:

4220

ohms

!2%,

1/2

Metal

f11m:

5110

ohms

!2%,

1/2

Metal

film:

4220

r>hns

-!;2'1-,

1/2

Var~able

cermet

5000

ol-.ms ,!:20%,

1/2

w;

sim

to

C'rs

SeriPS

360.

Cnmpmdti<>n:

560

ohm5

:!:G%,

1/4

Composlhon:

l.RK

ohm~

:st.

1/4

w.

Composition:

470

ohms

:!:5'!,

1/2

w.

SYMBOL

R~21

R222

R223

R224

R225

R233

a~d

R234

R235

R236

YR201

VR202

11'201

C297

.

""

C298

C299

CR295

GE

I

\RT

NO.

-sA·too

1~1'41

:

9A

700

•061'8.1

l9A700l06P77

3Rl52P511J

;gA7GOJ13Pl5

_9C850~05P2

:

9A

700_,_12P

15

:91'.700iCo6P75

3R152P241J

403688iP5

:

9A

l29571P:

19Al16'108PC

C9All53~0Pl0

l9A116783P1

:9D416275P2

:90416112Pl

51Y~I7~!-'2

:9A7027S2P5

N207P13C6

:

C!A

70CJ68P1

:IJAIJ6J23P:

'9A

1

~8:161

Pl

•

9Al29361P2

DESCRIPTION

COOlpOSltion·

120

OllmS

!5%,

1/2

w.

Composition

6.8K

ohms

~5%,

1}4

Cumpu~L~ion

3-9K

ubmo-;

,!:51,

1/4

Composition

510

ohms

,!:5\[.,

1/4

w.

Composition

10

ohms

:!:5'I,

l/~

w.

Shunt

res1stor.

Compo5i.tion

10

ohms

:s%,

1 w.

Comt:o~:ltion.

3.3K

ohms

~5%,

1}4

w.

Composition·

?:40

ollms

~~'1,

1/4

w.

VOLTAGE

REGDLATORS -------

7,Pn~r:

.~00

1nll',

2.~

noEninal.

Z<>ner:

500

mW,

5.4

nominal

.

-CABLES----------

~·i,-e

Strap.

HEAT

SINK

ASSEMBLY

19B2l9688Gl

M

llOD~L

&

INTERMJTTAC\"T

J)IITY

S'I'A'I'TO'I

19B219688C13

E

MOD3L

- - CAPACI'tCJtS

ce,-amtc:

0.01

uF

-0

+100't,

500

VOCW,

rat~d

~0

amps;

sim

to

Erie

327050X5W0103P

•

Electrolytic·

200

uP

+-150-lO:t,

18

V:JCII';

~1m

to

Mallory

Type

TTX.

- -

DIOm:S

AND

RECTTF!ERS

- - - - -

Rectifier,

silicon:

100

VDC

block1ng,

b

amp;

to

MR751,

-MISCELLANEOUS - - - - - - - - -

Filter

casting.

Insuhtor.

(Loc

...

tod

1>nder

printed

wiring

boardj.

Wash<>r,

sprin~

tenslon

·

375-20.

to

WallacE'

Barnes

Nut,

t>ex,

brass:

No.

8-32.

(Us<ld

with

Q201

and

Q202).

Hex

nut:

No.

10-33.

{Used

with

Q~O:J;.

Insulator,

hushing.

(Used

with

Q210).

Insulator,

plate.

(Used

with

Q?lO).

:lh

i

<•1

Ei,

(Lo::a

tHd

hetween

L221-L222

and

L22~-L2~:J).

Shield.

(Lo~a

ted

betwe<>n

r

~?.0-!.221)

.

PRODUCTION

CHANGES

Chang.es m

IIHJ

PCJUipmerEt

to improve pertorll"ance or

'O

Simplify circuits are identifieC

by

a

ReVISIOn

Lener_

wh1ch

:S

stamped afterthe

nodcl

number

of the

un•t

The revisionstamped

on

theunit i'lcludes all

Re'er to the Par:s List for descnpt10ns nf

P"Ei~

il'IPcled

by

the8e revlSions

RF\'.

A

REV. B

~!l_~a.r~

19D?l7968G1-1

To

lmprov"

np,.r"tion

in

~<lld

temperJ.ture

en;ironmc-nt~

witC

~id<e

fr<•quency

spacing.

Changnd

8R20!.

PA

Boarr!

19n'1l7968G1

1',-,

impr·~YC

sto~band

attcnuatLon

LD

11..-,

2.~-:{C

llll/

nwge.

Ch"nE<'cl

1'260

an(:'

C~65.

l'A

B<1ard

19D4179i)8G2-04

RI-'V.

B - 'l'o

att.,nuate

3,12

c•oEtductGd

spur1<nm

by

chanJ;iug

PA

in)

lEI;

swa!Jped

posit1o"s

,,r

1.~01

ar_d

C20.~.

PA

llnard

1GD117£'63G:J G4

RF:V. C -

'!'cJ

stab1ll7.<'

Q?C3

h)'

r('d,!ccog

base

rc•si~tanoo;

R207

cba,g:ed

l'rom

:JH7R200.J

to

:JR7~10(),J,

REV. D

l'A

Boar~

__

l9D117968G3

To

increa~c

!JO~~r

ouLJlLEt

at

low

end

of

36

t•>

4~

Mf:z

'Jplit.

f'huEtged

C3l7M

fr<Jm

7·18916~P37

(270

pF)

V>

7489162P35

(22C

pl).

and

C250M

from

18All-3656Pl00Jl

1100

PF)

to

1AA1\6E5e)Pl50Jl

(1.~0

pF).

PA

Board

19D417968G1

REV. D - To

1~crease

power

uutput

ar.d

stablllty

at

l•JW

end

of

b~nd.

RFV,

A -

Chan~cd

C205

from

7189162P29

(120

pF)

to

7489162P35

(220

u.'),

Changf'li

C?:711

1re>rn

74~RI621'35

(2~0

rF)

to

7189162Jl:J3

(180

pF).

Ch~ngyd

C2381!

ani

C23'/ll

fr'lm

l9A1l66G6P~6JO

~56

pF)

t.-,

l9A:l66~6P68JO

(68

pf).

PA

fl~~~n-hly

l9C321295G2

&

G:o

~~Gi~~reas~

power

'>Utput;

deleted

Q201

(l0A116839PI).

Added

£_!1-_!ssembl)-

19C:J21395Gl-G4,

G8

GI2

RJo:V.

TC!

in<:r.-,"s''

p0wer

outpu-:.

Changed

Q201

trom

l9A116838I'1

to

19A11696t.~l.

P.EV. B

PA

As6Hmhly

19C32129_5~~--~

'l'o

improve

ope,-ation

of

rx>wer

control

""

42-50

I<!Hz.

50-~'JLtt

PA.

Add.-,d

C280

anc

C2f\1.

GE MASTR II User manual

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