GE 21FLP4 User manual

UMW

Vol.

13,

No.

5

COMPLETE

ELECTRONIC

SERVICING

INFORM

radio

• tv •

hi-fi

ATIOI

November,

1961

G-

E

SONIC

REMOTE

CONTROL

SYSTEM

I

The

RF

type

remote

control

sys-

tem

was

described

in

Vol.

12,

No.

2

through

Vol.

13,

No.

1

issues

of

TECHNI-TALK.

This

system

was

initially

used

in

the

General

Electric

"U4"

and "

M5"

lines

of

receivers

and

was

continued

in

a

portion

of

the

"M6"

line.

Sonic

Remote

Control

System

A

new

type

remote

system

was

also

used

in

some "

M6"

receivers.

This

new

system

has

but

two

function

buttons

on

a

new

style

remote

hand

unit.

The

electrical

differences

be-

tween

the

two

systems

are extensive

as the

former

system

engaged

a

modulated

RF

carrier,

while

the

lat-

ter

is

considered

a

super-

sonic

car-

rier

system.

This

new

control

system

will

be

discussed

in

detail

and

will

be

referred

to

as the

Sonic

Remote

Control

System.

The

units

which

make

up

this

system

are

pictured

in

Fig.

1.

Fig.

1

Units

used

in

General

Electric

Sonic

Remote

Control

System

The

sonic

system

carrier

operates

in

the

range

of

40KC

with

signals

produced

by

a

transistorized

hand

unit.

This

system

is

extremely

noise

resistant

to

provide

immunity

to

audible

noises

produced

in

the

area

of

operation.

While

the

transmitter

unit

has

only

two

operational

buttons,

the

operator

is

still

able

to

perform

all

the

functions

of

the

RF

models,

that

is;

turn

the

TV

receiver

off

or

-

on

remotely,

change

channels

and

raise

or

lower

the

audio

volume

level

to

suit

his

listening pleasure.

This

lat-

ter

function

is

performed

by

a

step

type

relay

which

provides

a

normal

position,

high

level,

mute

and

low

sound

level.

The

channel

change

operation

pro-

vides

one

position

where

the

TV

re-

ceiver

is

turned

off.

This

is

normally

set

at the

13th

position

of the

tuner

except

on

those

models

where

UHF

has

been

included.

Models

factory

shipped

with

UHF

have

the

off

posi-

tion

set

at

the

channel

9

position.

This

is

easily

changed

by

moving

the

nylon

contactor

on

the

OFF

selector

disk,

located

at

the

rear of

the

tuner

as

shown

in

Fig.

2,

to

an

unused

channel

position

and

then

programming

this

channel

with

the

front

tuning

knob

as

is

outlined

in

the

operating

instructions.

OFF-

SELECTOR

DISK

(/

y.

OFF-

BUTTON ....•""«.<-

55

2

Off

position

selector

disk

Fig.

The

transmitter

hand

unit

for the

Sonic

Remote

System

is

a

transistor-

ized

super-

sonic

oscillator

circuit.

This

unit

is

capable

of

producing

two

super-

sonic

signals

for

activating

re-

ceiver

function

relays.

No

audible

sound

is

produced

by

this

system

as

there

is

no

modulation

added

to

the

carrier.

The

new

sonic

remote

transmitter

is

a

simplified

transistorized

oscil-

lator

circuit

producing

two

tones.

The

higher

of

these

tones

is

a

41KC

sig-

nal

which

operates

the

channel

se-

lect

and

remote

off

relay.

The

lower

tone

is

39KC

and

is

used

to

key

a

stepping

relay

to

provide

four

steps

of

audio

level

change.

The

simplicity

of the

circuit

is

ev-

ident

when

you

view

the

schematic

of the transmitter,

Fig.

3.

The

cir-

cuitry

consists

of

an

oscillator

coil

L751

which

is

tuned

to

the

upper

fre-

quency

of

41KC.

When

power

is

ap-

plied,

switch

S752

is

closed

complet-

ing

the

ground

or

common

side

of

the

line.

The

double

pole

switch

is

used

to

insure

that

power

is

applied

to

the

circuitry

after the

circuit

com-

ponents

are

switched

to

prevent

transistor

failure.

The

tank

coil

is

tuned

by

C753,

a

1350uuf

capacitor,

and

is

loaded

by

R754.

The

oscillator

circuit

of

TR751

is

a

base

biased

NPN

type

transistor:

Pressing

S751

shunts

C754

into

the

circuit

and

lowers

the

frequency

to

39.0KC.

The

output

of

the

oscil-

lator

is

fed

to

a

PNP

buffer-

amplifier

circuit

TR752

which

has

its

output

fed

to

L752.

This

coil

placed

across

the

transducer

has

2

modes

of

opera-

tion

which

when

properly

set

provide

the

desired

amplification

for

either

frequency.

This

output

circuit

has

the

signal

fed

between

the

base

and

emitter.

R751,

the

680

ohm

resistor

in

the

emitter

of

TR751,

acts

as

a

Continued

on

Page

9

8753

y

47K

IR

751

26306

y

475

C754

NPN

co'qs7c5 3 I

F"

5°-530

s on

tl

v e

STEPPING

.1._

lerAvL

-11

7*;41

3309 _

1'

35

° I

3V

3.9v

C751

1022

R75,

680

C752

2

.911

5752

ON-

011

CHANNEL

SELECT

C755

24090

R752

15fl

TR

752

PNP

28319

AMP

33

VOLTAGES

TAKEN

WITH

a

vTvM

ALj.f

6ATc

TYPES

28

271321

1111100V/V9

KVCC

Lk

3 I

sz

73V

HAn

Fig.

3

Schematic

diagram

of

ceramic

transducer

transmitter

used

in

Sonic

Remote

Control

System

A75,

CERAMIC

TRANS-

DUCER

NEW

GENERAL

ELECTRIC

21FLP4

A

NEW

TYPE "

UNIVERSAL"

REPLACEMENT

TUBE

General

Electric

recently

an-

nounced

the

21FLP4,

newly

devel-

oped

21"

90° "

Universal"

replace-

ment

tube.

This

one

tube

type

will

replace

13

popular

industry

types:

21ALP4A

21BNP4

21CMP4

21ALP4B

21BTP4 21CVP4

21ATP4

21CBP4

21CWP4

21ATP4A

21CBP4A

21BAP4

21CBP4B

In

1960

the

13

types

accounted

for

up

to

25%

of the

replacement

picture

tube

market.

Now,

you

can

stock

one

out

of

every

four

replace-

ment

picture

tube

installations,

sav-

ing

you

time

and

enabling

you

to

provide

faster

customer

service.

The

G-

E

21FLP4

features

a

unique

designed

straight

line

high

resolution

gun

with

electrostatic

focusing,

which

does

not

require

an

ion

trap.

This

makes

the

installa-

tion

easier

and

faster.

The

21FLP4

uses

a

high

temperature

phosphor

developed

by

General

Electric

which

provides

improved

brightness

and

contrast.

The

carton

identification

has

the

tube

type

in

large

bold

print

and

is

followed

by

a

listing

of

all

the

types

it

replaces.

All

G-

E

replacement

picture

tubes

contain

all

new

material

and

parts

except

for the

envelope,

which

prior

to

reuse,

has

been

inspected

to

the

same

standards

as

a

new

envelope.

See

your

authorized

G-

E

tube

dis-

tributor

for

information

regarding

G-

E

Black-Daylite

picture

tubes.

*

Re-

used

Envelope

e

ELECTRONICS

ONE

G-

E

21FLP4*

PICTURE

TUBE

REPLACES

13

TYPES

FILLS

25%

OF

YOUR

REPLACEMENT

NEEDS

The

General

Electric

21PLP4

just

released.

Here's

the

only

picture

tube

you

need

for

one

out

of

every

four

replacements.

It

replaces

13

tube

types.

Thirteen

replacement

tubes

you

don't

have

to

order—

pick

up—

pay

for—

or

carry

in

stock

to

meet

your

customers'

re-

quirements.

ICs almost

like

getting

a

I3-

tube

inventory

in

one

picture

tube!

Quick

avail-

ability

for

more

of

your

replacement

needs.

The

General

Electric

21FLP4

is

a

low-

voltage

electrostatic

focus

tube

which

does

not

re-

quire

an

ion

trap

magnet.

Saves

time

and

work

on

service

calls

and

in

the

shop.

The

General

Electric

high-

resolution

electron

gun

and

deep-

cushion

phosphor

screen

help

pro-

vide

the

long-lasting,

brighter

picture

your

customers

want.

The

General

Electric

21FLP4

re-

places these 13

tube

types:

21ALP4 2IBAP4

21CBP4B

2IALP4B

2IBNP4

21CMP4

21ATP4 21BTP4

21CVP4

2IATP4A

21CBP4

21CWP4

2ICBP4A

Get

full

details

on

this

2I-

inch

90-

degree "

uni-

versal"

replacement

picture

tube

from

your

General

Electric

tube

distributor..

General

Electric

Company,

Distributor

Sales,

Elec-

tronic

Components

Division,

Roam

8238B.

Owensboro,

Kentucky.

73ogress

Is

Our

imporIant

Product'

GENERAL

ELECTRIC

BENCH

NOTES

G-

E

REMOTE

RECEIVERS

I

want

to

commend

the

boys

respon-

sible

for

the

remote

controls

on

the

new

G.E.

TV

sets.

They

are

neat

pieces

of

engineering.

On

several

R.F.

remotes

I

have

re-

cently

had

the

same

trouble.

The

sensi-

tive

relays

would

not

pull

closed

when

a

function

button

was

depressed.

The

reed

relay

was

working

in

each

case

and

the

actuating

voltage

was

present.

In

each

instance,

I

found

a

small

piece

of

steel

cutting

wedged

between

the

armature

and

pole

piece

of

the

relay.

When

this

was

removed

the

relay

was

restored

to

normal

operation.

Gerald

Chambers

3415 -

25th

Lubbock,

Texas

RECTIFIER

QUICK

CHECK

I

have

found

that

when

a

television

set

comes

into

the

shop

with

the

com-

plaint

of

gradual

shrinkage

of

hori-

zontal

and

vertical

sweep

during

the

warm-up,

it

is

usually

caused

by

the

power

rectifier

tube.

A

simple

way

to

determine

this

would

be

to

remove

and

replace

the

rectifier

tube.

However,

the

sets

that

employ

selenium

rectifiers

be-

come

more

involved

if

the

particular

size

of

rectifier

is

not

in stock.

It

has

been

nrit

experience

that

a

quick

way

to

check

whether

a

selenium

rectifier

is

bad

or

not

is

to

place

an

electric

fan

blowing

toward

the

recti-

fier

and

to

observe

the

picture.

Increase

in

height

and

width

of

pic-

ture

proves

the

rectifier

is

bad.

Lack

of

increase

in

height

and

width

proves

the

cause

is

elsewhere.

In

most

cases

the

input

filter

capacitor

is

at

fault.

Christopher

E.

Leone

Ridge

Television

Co.

7820

Third

Ave.

Brooklyn,

N.Y.

SET

PROTECTION

Protect

burned

out

V H F

tuner

coils

against

high

voltage

and

lightning

surges

by

inserting

two

fuses

in

T V

antennae

lead-in

of

1

43

ampere

or

less

rating.

A

nthony

Tomashunis

826

Winters

Avenue

West

Hazleton, Pa.

* * *

Those

desiring

to

have

letters

published

in

this

column

should

write

the

Editor

Techni-Talk,

Electronic

Components

Division,

General

Electric

Company,

Owensboro, Kentucky.

For

each such

letter

selected

for

publication

you

will

receive

$10.00

worth

of

General

Electric tubes.

In

the

event

of

duplicate

or

similar

items,

selection

will

be

made

by

the

Editor

and

his

decision

will

be

final.

The

Company

shall

have

the

unlimited

right

without

obligation

to

publish

or

otherwise use

any

idea

or

suggestion

sent

to

this

column.

Caution:

The

ideas

and

suggestions

expressed

in

this

column

are

those

of

the

individual

writers.

These

ideas

and

suggestions

have

not

been

tried

by

the

General

Electric

Company

and

therefore

are

not endorsed,

sponsored

or

recommended.

2

111

AFC

Circuits

"Horizontal"

AFC

Circuits

AGC

Circuits

Addition

of

A.G.C.

to

G-

E

805

series

T

and

S

Correction

for

Overload "

U2"

Receivers

Video

Detector,

A.G.C.

and

Video

Amplifier

Anti-

Static

Cleaner

and

Polish

TV

Anti-

Static

Cleaner

and

Polish

Bias

Supply

for

TV

Construction

Details

Capacitance-

Resistance

Bridge

How

to

Get

the

Most

Out

of

Your

Test

Equipment

Capacitors

New

G-

E

Service

Designed

Capacitors

Capacitor

Kits

Capacitor

Substitution

Boxes

Construction

Details

Color

Box

Construction

Details

Color

TV

Part

I —

Color

Reproduction

Part

II —

Construction

of

a

Color

Box

Part

III —

Visible

Spectrum

and

Chromaticity

Charts

Part

IV —

Development

of

Color

Signals

Part

V —

Color

Signal

Frequencies

and

Balanced

Modulation

Part

VI —

Vectors

Part

VII —

Development

of

Chrominance

Signal

Part

VIII —

Color

Signal

Phase

and

Amplitude

and

Burst

Signal

Part

IX —

Gamma

Correction,

Delay

Lines

and

Block

Diagram

of

Transmitter

Part

X —

Aperture

Mask

and

Post

Acceleration

Type

Picture

Tubes

Color

Receivers

Part

I —

Tuner

and

Video

1-F

Amplifiers

Part

II —

Video

Detectors

and

Video

Am-

plifiers

Block

Diagram

and

Schematic

for

General

Electric "

CL"

Color

Receiver

Part

III —

Burst

Gate,

Subcarrier

Gener-

ation,

Synchronous

Detectors

and

Chroma

Amplifiers

Part

IV —

Matrixing

Circuits

and

Aper-

ture

Mask

Tube

Part

V —

Mechanical

Adjustments

on

Aperture

Mask

Tube

Part

VI —

Vertical

Sweep

and

Convergence

System

Conversion

to

Larger

Picture

Tubes

G-

E

Model

811,

Admiral

Model

4H16S

G-

E

Model

809,

RCA

Model

730TV2

G-

E

Model

820,

Philco

Model

48-1001

G-

E

Model

12C101,

Stromberg-Carlson

Model

TV-

12

V

OL.

N

O.

2 2

2 4

10

6

1 5

12

1

am».

12

5

1 3

6 2

3

6 4

6 5

6 6

7 1

7 2

7 3

8 2

9 2

9 3

9 5

10

1

10

2

10

3

2 5

2 6

3 1

3 2

COMPLETE

INDEX

Vol.

1,

No.

1

through

Vol.

13,

No.

5

G-

E

Model

802,

Capehart-Farnsworth

Model

651P

G-

E

Model

10C101,

RCA

Model

KRS-20

G-

E

Model

910,

RCA

Model

630TS

to

14

inch

G-

E

Model

815,

Motorola

Model

VF-

102

Motorola

Model

12VT16

RCA

Model

630TS

to

20

inch

D-

C

Restoration

D-

C

Restoration

and

Sweep

Circuits

Easy

Open-

Easy

Out

Tube

Carton

New

G-

E

Tube

Carton

Field

Strength

Meters

UHF

Antenna

Installations

Five

Star

Tubes

Characteristics

and

Prototype

Receiving

Tube

G-

E

Service

Policy

Statement

G-

E

TV

Service

Policy

Statement

Germanium

Diodes

Germanium

Diodes

in

Video

Detectors

Horizontal

Circuits

D-

C

Restoration

and

Sweep

Circuits

Deflection

Waveforms

and

RF

Supplies

Excessive

Width — "

M4"

Excessive

Width — "

U2"

Horizontal

AFC

Systems

Horizontal

Deflection

Circuits

and

Kick-

back

Power

Supplies

Horizontal

Jitter — "

M4"

Horizontal

Retrace

Elimination

Circuit

Kill

that

Retrace —

Horizontal

Replacement

Sweep

Transformers

How

Electronic

Components

Are

Made

and

Tested

Birth

of

a

TV

Bulb

How

G-

E

110°

Picture

Tubes

are

Made

How

G-

E

Picture

Tube

Phosphors

are

Made

How

G-

E

Receiving

Tubes

are

Tested

How

G-

E

Semiconductors

are

Made

How

G-

E

Service

Designed

Tubes

are

Made

How

G-

E

Transistors

are

Made

G-

E

Expands

Syracuse

Picture

Tube

Plant

New

G-

E

Copper

Core

Anode

Material

New

G-

E

23"

Picture

Tube

New

G-

E

Sandwich

Cathode

New

G-

E

Electron

Gun

How

to

Build

Bias

Supply

for

TV

Servicing

Capacitor

Substition

Boxes

Color

Box

Complete

Service

Shop

Picture

Tube

Tester

Resistor

Substition

Boxes

Service

Bench

Transistor

Radio

Power

Supply

Transistor

Tester

V

OL.

N

O.

3 3

3 4

3 5

3 6

4 1

4 2

1 6

2 3

11

3

10

5

2 2

2

11

4

2

11

10

12

11

10

12

13

12

13

4

2

6

1

2

6

2

6

3

1

5

3

5

6

12

5

2 6

6 2

8 4

5

2 5

3

13

2

10

6

1

3

Hum

or

Buzz

Hum

or

Buzz

in

TV

Receivers

I

Hum

or

Buzz

in

TV

Receivers

II

Stereo

Hum

Problem (

5

Parts)

Sync

Buzz — "

U-2"

Indian

Head

Test

Pattern

Tele

-

Clues

No.

181

thru

188

Inventory

Guide

TV

Tube

Inventory

Guide

Lead-

In

Various

Types —

VHF

and

UHF

New

600

MA

Series —

String

Tubes

Substitution

in

G-

E

20"

and

21"

Models

Substitution

in

14",

16"

and

17"

Models

Noise

Canceller

Circuits

"EE", "

H", "

J"

and "

0"

Receivers

"G"

and "

K"

Receivers

"S", "

ST", "

U"

and "

U2"

Receivers

Oscilloscopes

How

to

get

the

most

out

of

your

test

equip-

ment —

Cathode

Ray

Oscillograph (

2

Parts )

Selecting

an

oscilloscope

for

TV

servicing

Phono

Cartridges

G-

E "

Golden

Classic"

and "

Stereo

Classic"

Stereo

Hi

-

Fi

Cartridges

Variable

Reluctance

Stylus

Wear

Considerations

Picture

Tubes

Aluminized

Picture

Tube

Replacement

Guide

Open

Heaters

Due

to

Arc-

over

Picture

Tube

Tester —

Construction

Details

TV

Picture

Tube

Warranty

and

Adjust-

ment

Policy

New

General

Electric

21FLP4

Replaces

13

Popular

Type

Picture

Tubes

Power

Tuning

TV — "

U-2"

Power

Tuning

Repairs

Printed

Circuits

Servicing

Procedures

and

Tools

Cracked

Boards

and

Arc-

over

Servicing

and

Servicing

Aids

Profit

Program

New

G-

E

Profit

Program

Streamlines

Your

Tube

Sales

for

Fast

Turnover,

Top

Volume!

New

G-

E

Profit

Program

Radio

Service

Manuals

Radio —

1961

Manual

Registration

Coupon

Radio

and

Phonograph

Service

Guide

Order

Coupon

Radio

Service

Notes

Radio —

Fading

and

Intermittents

Radio —

G-

E "

Silent

Partners"

Save

Service

Time

Radio-Motorboating

in

Transistor

Radios

Radio —

C435

and

T125

No

Audio

Radio —

P675

and

P720

Current

Readings

Radio —

P710,

P711-

A

Circuit

Revisions

Radio —

P715,

P765

Antenna

Support

4

-e

V

OL.

No.

5 2

MI

7 4

7 6

10

11

5 I

6

1

2

3,

4

10

5

1 6

5 5

7 5

5 1

13

J

10

5

10

11

3

4

5

12

6

13

5

13

1

13

3

12

2

12

5

10

6

12

4

11

5

Radio —

P715,

P765

Intermittents

and

Motor

Boating

Radio —

P715,

P765

Loose

Leatherette

Radio —

P745 —

Low

Sensitivity

Radio —

P745

and

P750

Circuit

Changes

Radio —

P755

Oscillation

and

Distortion

Radio —

P755

and

P805

Voltage

Readings

Radio —

RP1120

and

AS2

Tone

Improve-

ment

Radio —

T120

Dial

Cord

Breakage

Radio —

T120

No

AM

Radio —

T120

No

AM

on

1.f.

End

of

Band

Rectifiers

G-

E

Silicon

Controlled

Rectifiers

May

Revo-

lutionize

the

Electrical

Industry

New

General

Electric

Germanium

TV

Rec-

tifiers

with

Replacement

Guide

400

MA

Germanium

TV

Rectifier

IN1008

400

MA

Germanium

TV

Rectifiers

IN1008

and

1016

Remote

Control

Systems

G-

E

Wireless

Remote

Control

System

(6

Parts)

G-

E

Sonic

Remote

Control

System

I

Replacement

of

21AP4

with

21ZP4-B

Replacement

of

21AP4

Metal

with

21ZP4-B

Aluminized

Glass

Picture

Tube

Resistor

Substitution

Boxes

Construction

Details

Retrace

Elimination

Horizontal

Retrace

Elimination

Circuit

Kill

that

Retrace —

Horizontal

Kill

that

Retrace —

Vertical

Service

Aids

Bench

Mirror

ETR-1275

Fuse

and

Heater

Checker

ETR-981A

Magnetic Swing-

Beam

Service

Light

ETR-1593

Miniature

Straightener

ETR-2037

Paper

Bags-

4,

10

and

14

Lb.

Sizes

Picture

Tube

Pillow

ETR-1469

Profit

Program

ETR-2033

and

2034

Rear

Control

Extension

ETR-2089

Safety

Glass

Puller

ETR-1592

Service

Call

Board

ETR-2144

Service

Drop

Cloth

ETR-1021A

Soldering

Gun

Holder

ETR-2582

Soldering

Iron

Holder

ETR-2790

Soldering

Tool

ETR-2377

Techni-talk

Binder

ETR-2000

Tele

-

Clue

Binder

ETR-1095

Tool

Toter

ETR-2338

Tube

Inventory

Display

Rack

ETR-2033

Tube

Puller

ETR-1094

Twin-

X

Wrench

Set

ETR-752

Vinyl

Tape

with

Dispenser

ETR-2791

Wire

Stripper

ETR-2376

Service

Cases

Matched

Service

Case

Set

Service

Shop

Plans

A

Plan

for Success (

Complete

Service

Shop)

Make

Your

Own

Service

Bench

Signal

Generators

AM

Signal

General

in

Place

of

Cross-

Hatch

Generator

V

OL.

N

O.

13

11

10

11

12

11

12

11

2

5

6

3

4

1

2

1

11

2

9 1

9 3

10

5

12

1-6

13

5

7 6

2 5

4 2

2 6

1 4

10

5

12

3

12

4

13

3

13

1

12

5

12

3

13

3

13

2

12

5

4 6

13

2

13

5

13

2

12

6

3 3

13

11

13

2

4,

5

2

5

2

11

5

G-

E

ST-

16A

Color

Alignment

Generator

I-

F

Alignment

I

I-

F

Alignment

II

Snivets

Description

and

Photos

Snow

TV

Receiver

Noise

Sparker

to

Check

for "

Gas"

or "

Air

Leaker"

Speakers

TV —

Speaker

Phasing

Stereo

Components

Variable

Reluctance

High

Fidelity

Cartridges

Stereo

Hum

Problem

Description

and

Correction (

6

Parts)

Successful

Service

Management

1959

Business

Outlook —

A.

E.

Kimball

Dealer

Modernization —

H.

B.

Nelson

Electronic

Components

Preview

of

1959 —

L.

B.

Davis

Increased

Electronic

Business

Forecast

for

1960 —

L.

B.

Davis

Planning

for

Success

in

the

Soaring

Sixties —

Andrew

E.

Kimball

Profile

of

the "

Boss" —

L.

M.

Robb

"Swim —

or

Sink!" —

G.

E.

Burns

The

Interrelation

of

Large

and

Small

Business —

Senator

J.

Sparkman

You

and

Your

Customers —

W.

F.

Greenwood

Promote

Your

Business —

F.

J.

Nataly

The Four

C's

of

Credit —

K. E.

Kenny

Small

Marketers

Aids —

A

U.

S.

Government

Service

Friendly

Tips

at

Income

Tax

Time —

V.

R.

Dahlgren

Sweep

Transformer

Replacement

TV — "

EE"

Sweep

Transformer

Replacement

Sync

Signals

and

Circuits

Synchronizing

Pulses

and

Circuits

Techni-Talk

Index

Complete

Index

of

Techni-talk

Vol.

1,

No.

1

thru

Vol.

10,

No.

2

by

issue

Complete

Index

of

Techni-talk

Vol.

1,

No.

1

thru

Vol.

13,

No.

5 —

by

subjects

Tele

-

Clue

Index

Tele

-

Clues

from

Vol.

1,

No.

1 —

Vol.

12,

No.

6

Indexed

by

Circuit

Tele

-

Clues

No.

1

thru

8

9

thru

16

17

thru

24

25

thru

32

33

thru

40

41

thru

48

49

thru

56

57

thru

64

65

thru

72

73

thru

80

81

thru

88

89

thru

96

97

thru

104

V

OL.

No.

8 6

1 6

2 2

11

10

6

11

3

1 5

1 6

2 1

2 2

2 3

2 4

2 5

2 6

3

2-

4 3

3 3

3 4

3 5

No.

105

113

121

129

134

141

149

156

163

171

181

189

195

203

208

214

222

229

236

241

252

263

274

thru

112

120

128

133

140

148

155

162

170

180

188

194

202

207

213

221

228

235

240

251

262

273

284

Tele

-

Clue

Schematics

"LW"

Chassis

"MM"

Chassis

"M-4"

Chassis

"M-5"

Chassis

"M-6"

Chassis

"MW"

Chassis

"N"

Chassis

"S"

Chassis

"U"

Chassis

"U-3"

Chassis

"U-4"

Chassis

"U-5"

Chassis

Tele

-

Tips

No.

1

thru

5

No.

6

Ulm

10

No.

11

thru

15

No.

16

thru

20

No.

21

thru

25

No.

26

thru

30

No.

31

thru

35

No.

36

thru

39

No.

40

thru

43

No. 44

thru

47

No.

48

thru

51

No.

52

thru

55

No.

56

thru

58

No.

59

and

60

No.

61

No.

63

and

64

No.

65

No.

65

thru

67

No.

68

and

69

No.

70

No.

71

No. 72

and

73

No.

74

and

75

No.

76

No. 77

Test

Equipment

AM

Signal

Generator

in

Place

of

Cross-

Hatch

Generator

Capacitance-

resistance

Bridge

Cathode

Ray

Oscillograph (

2

Parts)

G-

E

ST-

16A

Color

Alignment

Generator

Signal

Generator —

1

Signal

Generator —

2

Tube

Tester

Vacuum

Tube

Voltmeter

V

OL.

No.

3 6

4 1

4 4

4 6

5 1

5 3

5 4

5 5

5 6

6 2

6 3

6 5

7 2

7 3

7 5

9 5

10

1

10

3

11

1

11

2

11

3

11

4

12

1

13

1

8 3

10

5

11

6

12

4

13

5,

7 1

8 1

8 4

10

6

11

5

12

5

2 1

2 2

2 3

2 4

2 5

2 6

3 1

3 2

3 3

3 4

3 5

3 6

4 1

4 4

4 6

5 3

5 4

5 5

5 6

6 3

6 5

7 2

7 5

10

1

10

3

4 2

1 3

2

3,

4

8 6

1 6

2 2

1 2

1 5

5

Transistors

Transistor

Theory

How

to

Make

a

Transistor

Tester

How

to

Make

a

Transistor

Radio

Power

Supply

Transistor

Tester

G-

E

Transistor Tester

How

to

Make

a

Transistor

Tester

Tube

Testers

How

to

Get

the

Most

Out

of

Your

Test

Equip-

ment —

Tube

Tester

Tuners

G-

E

Model

FA-

10

and

FA-

12

Hi

-

Fi

Tuner

The

G-

E

UHF

103

Tuner (

2

Parts)

The

Head-

End (

2

Parts)

UHF

Converters

or

Tuners

Servicing

TV

Tuners (

6

Parts)

TV

Antennas

Television

Reception (

2

Parts)

UHF

Antennas

UHF

Antenna

Installations

TV

Channel

Frequencies

Complete

list

of

channel

frequencies

TV

Circuit

Description

D-

C

Restoration

Deflection

Circuit

Waveforms

and

RF

Power

Supplies

Horizontal

AFC

Systems

Horizontal

Deflection

Circuits

and

Kickback

Power

Supplies

Synchronizing

Pulses

and

Circuits

The

Head-

End (

2

Parts)

Video

Detector,

A.G.C.

and

Video

Amplifier

Vertical

Sweep

Circuits

TV

Picture

Tubes

Aluminized

Picture

Tube

Replacement

Guide

Part

I —

Phosphor

Specifications

and

Implosions

Part

II —

Electron

Gun

and

Gun

Defects

Part

III —

Gun

Defects

continued

and

Cathode

Images

Part

IV —

Construction

of

a

Picture

Tube

Tester

Open

Heaters

Due

to

Arc-

Over

Replacement

of

21AP4

Metal

with

21ZP4-B

Aluminized

Glass

Picture

Tube

TV

Receiver

Noise

or

Interference

TV

Receiver

Noise

TV — "

U-3"

Apparent

Ignition

Interference

TV

Reception

Report

on

UHF

Reception

The

Antenna (

2

Parts)

UHF

Antenna

Installations

TV

Service

Guides

Volumes

1,

2,

3

and

4

TV

Service

Manuals

1961

TV

Manuals

Plan "

D"

and

Plan "

E"

V

OL.

N

O.

II

1

5

12

13

1

2

3,

4

3,

4

2

6

1-5

1

1,

2

5 2

4 3

1 6

2 3

2 2

2 4

2 1

1

3,

4

1 5

1 6

5 5

4 4

4 5

4 6

5 1

7 5

7 6

4 1

11

2

5 2

1

1,

2

6 4

13

5

12

6

TV

Service

Notes

Apparent

Ignition

Interference

On "

U3"

Receivers

Color

Receiver —

Models: 21T500,

21C700

and 21C701

Correction

for

Overload

on

Strong

Signal —

"U2"

Receivers

Electrical

Safety

Test

Excessive

Width — "

M4"

Sets

Excessive

Width — " U2"

Receivers

Horizontal

Jitter

in "

M4"

Receivers

Identifying

Dual

Diodes

Intermittent

Channel

Selection "

M6"

Pincushioning

Correction

Power

Tuning

Repairs — "

U2"

Receivers

Removal

of the

Metal

Back

on "

M4"

Models

Replacement

Sweep

Transformers

Servicing

the "

M6"

Contrast

Control

Circuit

Slippage

in

Fine

Tuning

Control

Speaker

Phasing

on

2-

Speaker

and

3-

Speaker

Models

Special

Components

in

TV

Receivers

Vertical

Sync Buzz

Trouble-"

U2"

Chassis

1961

TV

Manual

Subscription

6CD6

Horizontal

Output

Tube

Failures

6GH8

Replaces

6EA8

in

Remote

Receivers

TV

Signal

Description

Synchronizing

Pulses

and

Circuits

TV

Sound

Systems

Delta

Sound

System

Repair

of

Ratio

Detector

Transformers

TV

Test

Tubes

8YP4

Universal

Picture

Tube

UHF

Reception

Report

on

UHF

Reception

UHF

Antenna

Installations

VOM &

VTVM

How

to

Get

the

Most

Out

of

Your

Test

Equip-

ment —

VOM —

How

to

Make

HV-Multiplier

How

to

Get

the

Most

Out

of

Your

Test

Equip-

ment —

Vacuum

Tube

Voltmeter

Vertical

Circuits

Kill

that

retrace —

Vertical

Sweep

Circuits

Video

Amplifiers

Video

Detector,

A.G.C.

and

Video

Amplifier

Video

Detectors

Germanium

Diodes

in

Video

Detector

Circuits

Video

Detector,

A.G.C.

and

Video

Amplifier

What's

Wrong

with

This

Picture?

What's

Wrong

With

This

Picture?

What's

Wrong

With

This

Picture?

What's

Wrong

With

This

Picture?

V

OL.

No.

11

2

11

5

10

6

12

2

11

3

10

5

11

4

13

1

12

5

13

3

10

6

11

2

11

1

13

2

11

3

11

4

12

4

11

6

12

6

12

3

12

3

2 1

10

3

10

5

10

41

5 2

6 4

1 1

1 5

1 4

1 6

1

11

2

3

4

Copies

of

all

issues

are

still

available.

If

you

are

miss-

ing

any

copies

and

cannot

obtain

them

from

your

dis-

tributor,

send

five

cents

for

each

issue

to:

Editor,

Techni-

Talk,

General

Electric

Company,

316

E.

Ninth

Street,

Owensboro,

Kentucky.

A

complete

set

of

all

back

issues

including

Vol.

1,

No.

1

through

Vol.

13,

No.

5

can be

ordered

as

ETR-2579

for $

3.50.

6

Te

lellil

"MW"

SCHEMATIC

1111111111111111

Schematic

diagram

for "

MW"

line

of

General

Electric

receiv-

ers.

These

receivers

use

19

and

23

inch

electrostatic

alumin-

ized

picture

tubes.

SCHEMATIC

DIAGRAM

ET86X111

and

ET86X113

VHF

TUNER

IMP

o

e

o

tza.

NEW

TELE

-

CLUE

BINDER

ETR-1095-A

A

3-

ring

binder

complete

with

all

Tele

-

Clues

and

Tele

-

Clue

Schematics

plus

tabbed

dividers

is

now

available

from

your

General

Electric

tube

dis-

tributor.

This

binder

will

also

hold

over

100

issues

of

Techni-Talk.

Ask

your

distributor for

ETR-1095-A

or

use

order

coupon

on

page

9.

SCHEMATIC

DIAGRAM

ET86X115

and

ET86X117

VHF/UHF

TUNER

HO

811>e-

SCHEMATIC

DIAGRAM

ET86X112

and

ET86X114

VHF

TUNER

7

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RADIO

TELEVISION

New

TV

Service

Guide,

Vol.

4

The

new

TV

Service

Guide

Volume

4

is

now

available

from

General

Elec-

tric

tube

distributors.

This

volume

covers

from

1958

to

1960

and

in-

cludes

M4, M5, M6,

U3,

U4

and

U5

series

receivers.

Similar

to

Volumes

1,

2,

and

3,

Volume

4

includes

such

features

as

a

photo

index

for

quick

set

indenti-

fication;

schematic

diagrams

of

chassis,

VHF

and

UHF

tuners;

a

complete

replacement

parts

list;

elec-

trical

components

and

main

chassis

diagrams

describing

tube

and

trim-

mer

locations

and

VHF

and

UHF

tuner

photos

with

component

loca-

tions

clearly

indicated.

All

four

volumes

are

available

from

G-

E

tube

distributors.

If

your

dis-

c>

tributor

is

unable

to

supply

you,

use

order

coupon on

this

page.

New

Radio

Service

Guide

r • '

RADIO

The

1946

to

1961

Radio

Service

Guide

combines

all

the

information

of

earlier

volumes,

and

updates

the

coverage

to

1961.

In

addition,

photos

of

every

model

listed

have

been

add-

ed.

Here's

what

this

convenient,

one-

step

reference

source

will

mean

to

you

in

your

service

shop:

•

Quick,

easy

identification

of

un-

known

models

from

photos

•

Complete

schematic

diagrams

for

all

post-war

models

•

Alignment

procedures

outlined

•

Complete

parts

lists

with

parts

description,

and

G-

E

catalog

number

Ask

your

G-

E

Distributor

for

ETR-2975

or

use

handy

order

coupon

on

this

page.

ORDER

COUPON

General

Electric

Company

Department "

B"

3800

N.

Milwaukee

Ave.

Chicago

41,

Illinois

Enclosed

is

money

order

or

check

payable

to

General

Electric

Company

for:

Quantity

ETR-2790

Soldering

Iron

Holder

ETR-2791

Vinyl

Electric

Tape

and

Dispenser

ETR-1765

Volume

1

TV

Service

Guide

Years

1946-1953

ETR-1766

Volume

2

TV

Service

Guide

Years

1953-1955

ETR-1767

Volume

3

TV

Service

Guide

Years

1955-1957

ETR-2892

Volume

4

TV

Service

Guide

Years

1958-1960

ETR-2975

Volume

3

Radio

Service

Guide

Years

1946-1961

ETR-2000

TECHNI-TALK

Binder

(with

tabbed

dividers

for

Tele

-

Clues

and

Tele

-

Clue

Schematics)

ETR-2579

Complete

Set

of

TECHNI-

TALK

back

issues

Vol.

1,

thru

Vol,

13,

No.

5

(Includes

all

Tele

-

Clues

and

Tele

-

Clues

Schematics)

ETR-1095-A

Binder

with

Tele

-

Clues

and

Tele

-

Clue

Schematics

Price

$1.10

$ .

49

$2.50

$3.00

$1.95

$2.00

$3.50

Name

Street

Address

City,

Zone

No.

and

State

(Please

Print)

If

you

are

receiving

more

than

one

copy

of

TECHNI-TALK,

please

cut

out

the

order

coupon

with

your

address

on

the

other

side.

Mark "

Duplicate

-

and

mail

to

Editor,

TECHNI-TALK,

Gen-

eral

Electric

Co.,

Owensboro,

Ky.

G-

E

Sonic

Remote

Control

System

I

Continued

from

Page

I

limiting

protection

resistor

while

R752

provides

emitter

stabilization

for

TR752.

A

standard

8.4V

transistor

radio

battery

provides

power

for the

trans-

mitter.

A

total

drain

of

22

ma

is

the

normal

load

with

about

15

ma

being

used

by

the

output

section.

One

indication

of

no

oscillation

is

low

battery

drain,

when

measured

by

a

low

scale

milliammeter.

The

transducer

employed

is

a

ceramic

type

similiar

to

that

used

in

ceramic

cartridges.

Each

unit

is

tuned

to

40.0

KC

for best

output.

Close

examination

of

this

unit

will

show

that

the

transducer

employed

by

the

transmitter

is

identical

to

that

used

in

the

receiver

except

for

physical

size

of

the

case

and

the

fact

that

the

unit

used

in

the

trans-

mitter

is

wired

and

soldered

into

the

circuit

while

the

receiver

unit

has

a

phono

socket

for plug-in

connec-

tion.

A

voltage

impressed

between

the

two

silvered

surfaces

causes

the

wafer

to

bend

and

when

this

voltage

is

part

of

an

AC

waveform

the

unit

vibrates

at

the

desired

frequency.

When

used

as

a

pick

up,

the

reverse

is

true;

that

is,

the

mechanical

vi-

brations

cause

a

voltage

to

be

pro-

duced

across the

two

silvered

sur-

faces.

L771

77A.

•

Mt..

71‘17-003

X771

CTROSOXIE

5772

VOLUME

STEPPING

R-

VOLTAGE

ARIES

AIN

INPUT

APED/AGE

or

SCOPE

Fig.

4

Schematic

diagram

of

electrostatic

transducer

transmitter

used

in

Sonic

Remote

Control

System

A

second

type transmitter

is

also

used

in

some "

M

6"

receivers.

Basic-

ally

the

operation

of

this

unit,

shown

schematically

in

Fig.

4, is

the

same

as

Fig.

3.

The

principal

differences

include

the

use

of

a

single

transistor

and

an

electrostatic

transducer.

Since

the

voltage

output

of

the

elec-

trostatic

transducer

is

higher

the

amplification

provided

by

the

second

transistor

is

not

required.

One

extra

note

on

service

to

be

emphasized

is

that

often

low

range

is

a

direct

indication

of

a

weak

bat-

tery.

Alignment

for

the

transmitter

will

be

covered

in

a*

later

issue.

The

Sonic

Remote

Receiver

will

be

described

in

the

9

TWO

NEW

G-

E

SERVICE

AIDS

Soldering

Iron

Holder

ETR-2790

on

bench

edge

ETR-2790

on

bench

top

The

new

General

Electric

Solder-

ing

Iron

Holder

is

designed

to

rest

on

a

flat

surface

or

to

be

mounted

on

the

edge

of

a

service

bench.

This

holder

will

accommodate

soldering

irons

up

to

inch

in

diameter.

If

you

use

a

soldering

iron

you

need

a

holder

that

will

protect

your

Il

_ _

Vol.

13,

No.

5

In

this

issue:

hands,

wires,

diagrams

and

tools

from

burns.

Since

this

soldering

iron

holder

completely

covers

the

tip,

it

provides

adequate

protection

for the

user.

The

General

Electric

Soldering

Iron

Holder

can

be

mounted

vertical-

ly

on

the

service

bench.

This

places

the

iron

off

the

working

area

but

still

readily

available.

It

can

also

be

used

in

a

horizontal

position.

The

Soldering

Iron

Holder

is

made

of

heavy

gauge

perforated

metal

withacadmium

aluminum

finish

which

resists

heat

discoloration.

Holes

in

both

the

inside

and

outside

cylinders

provide

maximum

air

circulation.

Ask

your

G-

E

tube

distributor

for

ETR-2790

or

use

the

handy

ordv

coupon

on

page

9.

Vinyl

Electric

Tape

and

Dispenser

ETR-2791

Here

is

a

real

time

saver

when

using

vinyl

electric

tape.

Since

this

type

of

tape

does

not

tear

easily,

it

is

usually

necessary

to

use

a

knife

or

cutting

pliers.

When

using

the

General

Electric

tape

dispenser

the

cutter

is

built-in

and

extra

tools

are

not

required.

11

Nov.,

1961

Page

G-

E

Sonic

Remote

Control

System

1 1

New

General

Electric

21FLP4

Replaces

13

Popular

Type

Picture

Tubes

2

Bench

Notes

2

Complete

Index

of

TECHNI-TALK

Vol.

1,

No.

1

thru

Vol.

13,

No.

5

New "

MW"

Tele

-

Clues

Schematic

7

New

TV

Service

Guide —

Volume

4 9

New

Radio

Service

Guide

1946-61

9

Techni-talk

on

AM,

FM,

TV

Servicing,

published

by-

monthly by

ELECTRONIC

COMPONENTS

DIVI-

SION,

GENERAL

ELECTRIC

COMPANY,

OWENS-

BORO,

KY.

In

Canada:

Canadian

General

Electric

Co.,

Ltd,

189

Dufferin

St.

Toronto

3,

Ontario.

R.

G.

Kempton,

Edito,.

Copyright

1961

by

General

Electric

Company.

HUI

111111111111111

Built-in

cutter

speeds

work

lent

ETR-2791

is

Each

dispenser

contains

00

inches

of

5/8

inch

vinyl

tape

with

dielectric

rating

of

7000

volts.

This

igh

qual-

ity

tape

will

give

both

ele

trical

and

mechanical

protection

whe

used

for

splicing

or

insulating

wir

s

or

hold-

ing

wire

assemblies

in

pl

ce.

Ask

your

G-

E

tube

dist

ibutor

for

ETR-2791

or

use the

ha dy

order

coupon

on

page

9.

ELECTRONIC

COMPONENTS

DIVISION

GENERAL

ELECTRIC

OWENSBORO,

KENTUCKY

MR

DONALD

L

HANSEN

17

79

WOODALL

OR

MISEAPOLIS

21

MINN

E221

BULK

RATE

U.S.

Postage

PAID

Schenectady,

N.Y.

Permit

No.

148

This

copy

of

Techni-talk

comes

to

you

through

the

courtesy

of

your

General

Electric

tube

distributor.

NOTE:

The

disclosure

of

any

information

herein

con-

veys

no

license

under

any

General

Electric

patent and,

in

the

absence

of

an

express

written

agreement

to

the

contrary,

the

General

Electric

Company

assumes

no

lia-

bility

for

patent

infringement (

or

any

other

liability)

arising

out

of

use of

such

information

by

others.

GE 21FLP4 User manual

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