GENERAL RADIO COMPANY 1383 Instruction Manual

INSTRUCTION MANUAL

Type

1383

Random-

Generator

A

GENERAL

Noise

RADIO

Contents

SPECIFICATIONS

INTRODUCTION-

SECTION 1

INSTALLATION-

SECTION 2

PROPERTIES OF

RANDOM

NOISE-

SECTION 3

PRINCIPLES OF

OPERATION-

SECTION 4

OPERATING

PROCEDURE-

SECTION 5

APPLICATIONS-

SECTION 6

SERVICE

AND

MAINTENANCE-

SECTION 7

PARTS LISTS

AND

DIAGRAMS-

SECTION 8

WARRANTY

We

warrant

that

each

new instrument manufactured and sold

by

us

is

free

from

defects in material

and

workmanship

and

that, properly used,

it

will

perform in

full

accordance

with

applicable specifications

for

a period

of

two

years after original

shipment.

Any

instrument

or

component

that

is

found

within

the two-year period

not

to

meet these standards after examination

by

our

factory,

District

Office,

or

authorized repair agency personnel

will

be

repaired or, at

our

option,

replaced

without

charge, except

for

tubes or batteries that

have

given normal service.

©GENERAL RADIO COMPANY 1969

West

Concord,

Massachusetts,

U.S.A.

01781

Form

1383-01

00-A

February,

1969

ID-0100

Specifications

Spectrum: Fl

at

(constant

energy

per

hertz

of

bandwidth)

± 1

dB

from

20

Hz

to

10

MHz, ± 1.5

dB

from

10

MHz

to

20

MHz.

Waveform: T

able

shows

amplitude-density-distribution spe

cifi

ca-

tions

of

generator compar

ed

with the Gaussian

probabi

lily-density

function

, as

measured

in a "window" of

0.2

o, cent

ered oo the

i

ndicated

values

:

Voltage

0

±a

± 2a

± 3a

Gaussian

Prob

.

Den

s.

Fun

ction

0.0796

0.0484

0.

0108

0.000898

Am

plitude-

Density Dist. of

138

3 Random-Noi

se

Gen.

0.079

6 ±

0.005

0.0484

± 0.

005

0.0108

± 0.

003

0.

000898

± 0.

000

3

(a

is

the

standard

deviation

or

rms

value

of

the

noise

volta

ge.)

Output Voltage:

At

least

1 V

rms max ,

open

circuit

.

Output Meter:

Indicates

open-circuit

output voltage

ahead

of

500

.

MlHR

fUll

Sf.Alt

Output Impedance:

500

. Can

be

shorted

without

causing disto

rtion

.

Amplitude Control:

Continuous

control

and

8-step,

10

dB-per-step

atten

uator.

Output Termin als:

GR874

<E

coaxial

connector

that

can

be

mounted

on e

ith

er fr

ont

or

rear pa

nel.

Accessories

Supplied: S

pare fuses,

lamp,

power

cord

.

Power Required: 100

to

125

or

200

to

250

V,

50

to

400

Hz ,

40

W.

Dimensi

ons

(width x height x depth): Benc

h: 17 x 37/a x 12

3/4 in.

(435 x

99 x 325

mm); rack,

19 x 3

1/2

x 103/4 in.

(485 x 89 x 275

mm).

Weight:

Net,

14

lb (6.5 kg);

shipping.

21

lb

(10

kg) .

Catalog
Numb

er

1383-

9700

1383-9701

Des

cription

Bench

Model

Rack

Model

Handbook

of

Noise Measurement

This 282-page book, by Dr.

A.

P.

G.

Peterso

n and Ervin

E. Gross, Jr

.,

of the

General Radio Engineeri

ng

Staff, covers thoroughly the subject

of

noi

se

and vibrat ion

measu

rement Copies are

ava

ilable from Gener

al

Radio

at

$2.00

eac

h, postpaid in the United

States

and Canada.

Introduction-Section

1

1.1 PURPOSE ......

. .

..

..

. . .

.. ..

. .

.

1

·1

. 1-1

.

1-1

.

1-1

.

1-1

1.2 DESCRIPTION

...

.

......

.

.......

.

1.3

CONTROLS,CONNECTOR S

AND

INDICATORS

.

1.4 ACCESSORIES SUPPLIED .

1.5

ACCESSO

RIESAVAILABLE

...

...

....

.

1.1

PURPOSE.

Th e Type 1383 Random-Noise

Gen

erator (Figure 1-1)

provid

es

a high level

of

electri

cal

noise at its

output

termi-

nals.

This type

of signa

l is useful in testing video- and radio-

fr

equency

systems

for

operation in the pr

esence

of

noise,

an

d for measurement

of

th e noi

se figu

re

of

such

systems.

The noise

si

gnal

can

be

used

directly, or

it

can

be

used

to

modulate the

output

of a

signa

l generator.

It

is

useful in

making

cr

ossta

lk

measuremen

ts and in determining the ef-

fective bandwidth

of

filters.

The 20-Hz to 20-MHz band-

width

of

th e noise makes

it

useful

for

even

wide-band video

systems.

1.2 DESCRIPTION.

Th e 1383 Random-Noise Generator consists

of

a therm-

ionic diode noi

se

source

with all-

semiconductor

ampli fi

ers

and

power supply. The noise

output

is useful

ove

r the fre-

qu

ency r

ange

from

20

Hz

to 20 MHz. Th e noise

output

am-

plitude

is

indicated by a meter on the

front

panel, and

an

output att

enuator permits reduction

of

the out

put

by a

total

of

80 dB in 10-dB st

eps

from a max imum

of

1 V, r

ms,

open ci rcuit. The outpu t imped

ance

is 50S1

.

1.3 CONTROLS, CONNECTORS

AND

INDICATORS.

The control

s,

connectors and indicators

on

the

front

and

r

ear pan

els

of

th e 1383 Random-Noise Generator are I isted

and d

esc

rib

ed

in Tabl

es

1-1

and 1-2, respectively.

The OUTPUT

connector on the

front

panel

is

a G R87

4®

coaxial connector.

If

desired,

it

may

be

removed

from

th e

front

panel and mount

ed

on the rear

of

the instrument. A

snap-

in hole cover (P/N 0480-2470) at the rear should

be

moved

to the front

if

this

change is made,

to

cover the hole

in the

front

panel.

1.4 ACCESSORIES SUPPLIED.

The

accessories

suppli

ed

with the Generator are listed in

Table 1-3.

1.5 ACCESSORIES AVAILABLE.

A Rack Adaptor Set (P/N 0480-9702) is

ava

ilable

to con-

vert the portable bench model

for

mounting in

an E lA

standard 19-inch relay rack. (Refer

to para

graphs 2.3 and

2.4.)
Also

availab

le are various patch cords and adaptors, some

of

whi

ch

are listed in Table 1-4.

GR87

4-G

coax i

al

fixed atten

uators

can

be

used

to reduce

th e

output

beyond the r

ange

of

th e attenuat or in the instru-

me

nt. Units are

avai

lable

with

attenuation values

of

3, 6,

10, 14,

and 20 dB.

INTRODUCTION

1-1

3

4

5

6

Figure 1-1. Type

1383

Random-Noise Generator.

Table

1-1

Controls, Connectors, and Indicators on the

Front

Panel

FIG. 1-1

NAME

TYPE

POSITIONS

I

FUNCTION

REF

.

1 POWER 2-position toggl e switch

OFF, POWER Energizes lnstrumerrt.

2

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

Pilot

lamp --------------------

Indicates when instrument
is

ene

rgi

zed.

3

-----------

Meter

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

Indicates open-circu

it

output

volta

ge.

4

OUTPUT LEVEL

Continuous rotary

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

Varies

output

voltage.

cont

rol

5

METER

FULL

9-position

rotary

1.0, 0.3,

0.1'

0.03,

Attenuates

output

in 10-

SCALE selector

switch

0.01' 0.003, 0.001'

dB steps.

0.0003, 0.0001

6

OUTPUT

50 D

GR874®coaxial

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

Connection

to

gene

rat

or

output.
connector and ground
jack

1-2

INTRODUCTION

FIG.

1-2

REF.

2

3

4

5

6

2 3

4

5 6

Figure 1-2. Rear panel

of

the

Generator, showing

controls

and connectors.

Table 1-2

Controls and Connectors

on

the

Rear

Panel.

NAME

OUTPUT

3/

10 A

6/10

A

QUANTITY

2

TYPE

I

POSITIONS

l

FUNCTION

(The OUTPUT connector on the

front

panel

can

be

moved

to

this

location on the r

ear

panel.)

Extraction-post fuse
holder

Extraction-post fuse
holder

Screwdriver-operated
slide switch

3-terminal

male

connector

Table 1-3

100-125,
200-250

Accessories Supplied.

(Refer also

to

Parts List.)

ITEM

GR

PART

NO.

Power Cable, 7-foot,

4200-96L2

3-wire

Spare

Fuse

(0.3

A,

5330-0800

Slo-Bio)

Spare

Fuse

(0.6

A,

5330-1100

Slo-Bio)

Spare Pilot Lamps 5600-0300

Holds

3/10

A fuse

(Sio-Bio).

Holds

6/10

A fuse

(Sio-Bio)

.

Selects proper range
of

line voltage.

Line-power

input

connection.

INTRODUCTION

1-3

Table 1-4

Some

of

the many coaxial patch cords, adaptors,

and

other

accessories

available

for

use

with

the Generator (cables

are

approximately three feet long.)

GR

GR

PART

CATALOG

NUMBER

DESCRIPTION

NUMBER

Cables

874-R22A

GR874

to

GR874

0874-9682

874-R22LA

GR874

to

GR874,

0874-9683

locking connectors

1560-P95

Phone

plug

to

double 1560-9695

banana

plug

776-B

GR874

to

BNC

(plug)

0776-9702

Adaptors, non-locking

874-0BJA

GR874 to

BNC

(jack)

0874-9700

874-0BPA

GR874

to

BNC

(plug)

0874-9800

874-0UJ

GR874 to UHF (jack) 0874-9718

Adaptors, locking

874-0BJL

GR

874 to B

NC

(jack)

0874-9701

874-0BPL

GR874

to

BNC

(plug) 0874-9801

874-0UJL

GR874

to

UHF (jack)

0874-9719

874-02

GR874 to binding posts

0874-9870

Fix

ed

Attenuators, non-locking

874-G3

3

dB

0874-9564

874-G6

6

dB

0874-9568

874-G10

10

dB

0874-9570

874-G14

14

dB

0874-9568

874-G20

20

dB

0874-9572

Fixed attenuators, locking

874-G3L

3

dB

0874-9565

874-G6L

6

dB

0874-9569

874-G10L

10

dB

0874-9571

874-G14L

14

dB

0874-9561

874-G20L

20

dB

0874-9573

Miscellaneous,

non-locking

874-W50B

Termination,

50

D.

0874-9954

874-T

T

ee

0874-9910

874-X

Insertion

Unit

0874-9990

874-TPD

Pow

er Divider 0874-9912

Miscellaneous,

locking

874-W50BL Termination,

50

D.

0874-9955

874-TL

Te

e 0874-9911

874-TPDL

Pow

er Divider

0874-991 3

1-4

INTRODUCTION

Installation

-Secti

on

2

2.1 DIMENSIONS

.......

.

2.2 BENCH

MODEL

......

.

2.3

RELAY-RACK

MOUNTING.

2.4

MOVING

THE OUTPUT

CON

NECT

OR

2.5 CONNECTING THE POWER . .

...

.

2.1

DIMENSIONS.

The dimensions

of

the 1383

are

shown in Figure

2-1.

~

19

--,

I

.

2-1

.

2-1
. 2-2
. 2-2
. 2-2

r

~

0

g

/01

~

u

-:

~

0

n

~

_j

RACK

MOUNT

HANDLES ON RACK

MOUNT ONLY

~

RACK ONLY

f

'~

r

1-

124

I

17

----

I

I

g

[0j

~

~

~

.,..---

(0

0

I~

~

0

\

~)

LJ

_i

r2

t-

:.=:J

c::t=

I

BENCH

.d

~

~L

8

12

Figure 2-1.

Dimensions

of

the

Generator

in inches.

2.2 BENCH MODEL.

The 1383-9700 (bench model) Random-Noise Generator

TABLE

2-1

is

delivered completely assembled in a metal

cab

inet, ready

for

bench

use.

A convenient bail, located between the

front

feet,

can

be

pull

ed

down

to

raise

the

front

of

the instrument

PARTS

INCLUDED

IN

RACK

ADAPTOR

SET

P/N 0480-9702

and provide a better view

of

the control settings.

To

convert the bench model

for

relay-rack

use,

proceed Fig.

2

·

2

No

.

Ref Used

as

follows

(see

Figure 2-2) :

a.

Order

an

0480-9702 Rack

Adaptor

Set.

Table

2-1

G 2

lists the parts included in the

Set.

b.

Loo

sen

the

two

captive 10/32 screws

(5,

Figure

1-2)

in the rear

of

the cabinet

until

the instrument

is

free; slide

the instrument forward,

out

of

the cabinet.

c. Remove the

four

rubber feet

from

the cabinet. Sim-

ply

push

out

the

two

rear feet. Spread the bail (A, Figure

2-2) slightly , and the

two

front

feet (B) and the bail

will

drop out.

Be sure

to

save

all parts

as

they

are

removed

for

possible reconversion

of

the instrument

to

bench mounting.

d. Pierce and push

out

the plugs

from

the

four

bosses

D

E

Item

Rack-Adaptor Assemb li

es

(handles)
Hardware

Set

includes
8

Screws,

BH

10-32,

5/16"

(only 4 requ ired)

4 Screws, BH 10-32,

9/16"

with

nylon cup washers

GR

Part

No

.

0480-4902

0480-3080

INSTALLATION

2-1

D

J.._!!J!:x

F~~

.ti '

Figure 2-2.

Method

of

mounting the Generator in a relay

rac

k.

(C)

on the inner

sides

of

the cabinet, near the front. Do

not

damage the threads in the threaded holes.

Push

from

inside

the cabinet.

e.

Attach one Rack

Adaptor

Assembly (handle)

to

each

si

de

of

the cabinet,

as

shown, using

two

5/16-inch screws

(D) in

each

. Note that the screws enter in opposite direc-

tions, one

from

insid e the cabinet and one

from

outside.

Use

the upper and lower holes in the assemblies.

f. Install the instrument in the cabinet and lock

it

in

place

with

the

two

captive screws through the rear panel

that

were loosened in step

b.

g_

Slide the entire assembly

into

the relay rack and lock

it

in place

with

the

four

9/16-inch screws (E)

with

captive

nylon

cup washers.

Use

two

screws on

each

side and tighten

them by inserting a screwdriver through the

holes (F) in the

handles.

To

reconvert the instrument

for

bench

use,

reverse

the

above procedure.

2.3 RELAY-RACK MOUNTING .

The 1383-9701 (rack-mounted) Random-Noise Genera-

tor

is

delivered completely assembled in a metal cabinet

ready

for

mounting in

an

EIA

standard 19-inch relay rack.

(If desired, the OUTPUT connector on the

front

panel

of

the relay-rack mode l

can

be

moved

to

the rear panel. Refer

to paragraph 2.4).

To

install the rack model in a relay rack, slide the instru-

ment (in its cabinet)

into

the rack and lock

it

in pl

ace

with

the

four 9/16-inch scr

ews

(E, Figure 2-2)

with

captive nylon

cup washers.

Use

two scr

ews

on

each

side and tighten them

by inse

rtin

g a screwdriver through the holes (F) in the

handl

es.

To

convert the rack model

to

a bench model, remove the

ra

ck-adaptor

set

by reversing the procedure

of

paragraph

2.2.

2-2 INSTALLATION

2.4

MOVING

THE OUTPUT CONNECTOR.

To

move the OUTPUT connec

tor

to

the r

ear

panel

(see

Figure 8-2) •

a. Loosen the

two

capt

ive

screws at the rear

of

the in·

strument (6, Fig. 1-2), and remove the instrument

from

its

cabinet.

b.

Remove and

save

the gray cover plate (P/N 0480-

2470)

from

its hole in the rear panel.

c.

Remove the

four

screws

that

hold th e

OUTPUT

con-

nector in the

front

panel.

d.

Move the connector

to

the rear panel. Pull the rubber

grommets

from

the keyhole-shaped slots they are in, sli

de

them along the cable

as

necessary, and

press

them

into

the

other

slots

so

that the cable

eas

ily reaches

the rear panel

(see

Figure 8-2).

e.

Use

the

four

screws

to

fasten the connector

into

the

rear

panel. (The wider pair

of

outer-conductor contacts

are

usually aligned vertically.)

f.

Press

the

snap

plug removed in step b

into

the hole in

the

front

panel

to

serve

as

a cover.

g.

Place

the instrument back in its cabinet , and tighten

the

two

screws at the rear

of

the instrument.

h.

To

replace the connector in the

front

panel, r

everse

the above procedure.

2.5 CONNECTING THE POWER.

The wiring

of

th e power transformer can be s

wit

ched, by

means

of

the 2-position slide switch (4, Figure 1-2) on the

rear

panel,

to

accept 50-

to

400-Hz line power

of

either

100-125

V or 200-250 V.

Connect

the three-wire power

cab

le ( P/N 4200-9622,

supplied)

to

the line and

to

the 3-terminal male connector

(5, Figure 1-2) on the rear

panel. One 0.3-A fuse and one

0.6-A fuse are

used

for

either line voltage. Power consump-

tion

is

approximately 35

W.

•

Properties

of

Random

Noise-

Section

3

3.1

DEFINITIONS

•

••

• 0 0

••

•••

•

3.2 DESCRIPTION

OF

RANDOM NOISE

3.3

AMPLITUDE

DISTRIBUTION

3.4

SPECTRUM

...

.

3.5

STATIONARITY

·

3.6

SUMMARY

· · · ·

3.1

DEFINITIONS.

The acoustical term

"noise"

was

applied originally

to

certain electrical signals

because

of

the undesirable audible ef-

fects th ey produced at the

output

of

radio receiver

s.

Noise, in

the

electrical

sense,

is

now

a broad term that

means

any un-

wanted

signal, and therefore

can

include

not

only

input-stage

noise and atmospheric noise in radio receivers,

but

also

cross-

talk, hum, and distortion.

Random noise

is

a signal whose exact value at any

future

moment cannot

be

predicted.

It

is

even a little

more than

that;

it

means

a signal containing no periodic component

whose

future

value

can

be

'predicted.

Unlike

periodic signals,

whose spectra consist

of

one

or

more discrete lines correspond-

ing

to

the various frequency components, random noise

has

a

spectrum that

is

a continuous function

of frequency, contain-

ing no discrete

line components.

3.2

DESCRIPTION OF RANDOM NOISE.

It

is

only

possible to describe random noise in terms

of

its

average

properties

that

cannot

be

measured instantaneously

but must

be

averaged

over some

finit

e measurement time. The

two

most

important

characteristics

of

random noise

are

its

amp

I itude distribution and its spectrum.

3.3

AMPLITUDE

DISTRIBUTION.

3.3.1

Amplitude

Distribution

Functions.

The instantaneous

value

of

a random noise, at

some

particular instant, cannot

be

predicted,

but

for

many noises

we

can

speak

of

the

probability

that the voltage

will

lie in some

particular

range.

This

probability

is

given by a function called

the amplitude density distribution, p(v).

When

multiplied by

a

voltage increment, dv, this

function

gives

the probability

.

3-1

.

3-1

.

3-1
. 3-3
. 3-4
. 3-5

that, at any given instant, the voltage lies between v and v + dv.
Because

the voltage must exist at some value,

it

follows that

th e integral

~-=

p(v)dv =

1.

Another useful

probability

function

is

the integr

al

over part

of

that range, called the amplitude

distribution,

P(v), defined

as

P(v) =

~

-~

p(x)dx

.

Thus defined,

P(v)

is

the

probability

that the volt

age

, at any

given instant,

lies below the value

v.

The values

of

these prob-

ability

functions lie on a

scale

between 0 and

1,

with 1 de-

noting certainty.

A probabi

lity

of

0.5 denot

es a 50%

chance

of

occurance_

3.3.2 The

Gaussian

Distribution.

The

Gaussian

or

normal

distribution

is

particula rl y im-

portant

for

several reasons:

It

describes the

"normal"

occur-

ran

ee

of

random measurement errors in experiments. The

amplitude

of

thermal noise in a resistance and shot noise in a

vacuum tube

are

Gaussianly distributed. The distribution

of

the

sum

of

many independent time-varying voltages approaches

the Gaussian

distribution

in the

limit

as

the number

of

such

voltages

is

increased, regardless

of

the dist

ribut

ion

of

the in-

dividual voltages

(derived

from

the Central

Limit

Theorem

of

statistics). An extension

of

this reasoning leads

to

the result

that

filtering

that

reduces the bandwidth generally makes a

non-Gaussian noise more Gaussian,

so

that, in this

sense,

the

Gaussian

is a stab

le

distribution. For th

ese reasons,

the

Gaussi-

PROPERTIES OF RANDOM NOISE

3-1

an

distributi

on is

of

fundamental importance and

is

the most

ap

pro

priat

e di st

ributi

on

of

random noise in most experiments.

For the

Ga

ussian

distribution,

v2

(_ 1 ) -

2a

2

p(v) =

\.

a.JE

e

and

P(v)

=

~

t + e

rf

(a-/7

)]

where a is the root-

mean-squa

re volta

ge

(in statist

ics,

the

standard de

vi

ation), and e

rf

denotes th e error function. Values

of th

ese

functions are given in Tabl

e 3-1 and t

he

functions

are

graphed in Figur

es

3

-1

and 3-2.

TABLE

3·1

Gaussian

amplitude distribution function

s.

v

p(v)

P(v

)

-

5a

.000 001 48 7 I a

.000

000

287

-

4a

.000 1

33

8/a

.000

031

67

-

3a

.004 43

2/a

.001 350

-2a

.053

99/a

.022

75

-1 a

.241

97/a

.1

58 65

0

.398 94/a .500

00

1a

.241

97/ a .841 34

2a

.053 9

9/

a

.977

25

3 a

.004 432/a .998

650

4a

.000 1

33

8/a

.999

968

33

5 a

.000 001 487

/a

.999 999 713

It can

be

see

n from Figure 3-2 that a

Gaussi

anly distr

i-

buted random noi

se lies

below its positive root-mean-square

value

(a = 1)

84

%

of the

time, and therefore exceeds that

value o

nly

1

6%

of the ti

me.

d

0., /

G"

0.4 /

0'"

0.3/

cr

(

\

I

\

0,2/cr

0 .1/

cr

I

I

\

I

'\

/

'-----

-

4a--3a-

-20'"

2o-

3.-

Figure 3-1.

The

Gaussian

probability

density func-

tion

of

a,

the

root-mean-square

amplitude.

3-2 PROPERTIES

OF

RANDOM

NOISE

40"

3.3.3 Importance

of

Knowing the Distribution.

Knowledge

of

the amplitude

distribution

of

a noise

is

important

in measuring its magnitude. Electronic voltmeters

respond

to

different

measures

of

the amplitude

of

the voltage,

su

ch

as

the rms, the peak,

or

the

(full

-wave-rectified)

average.

The peak and

average

values

of

various waveforms having

1-

volt,

rms, amplitude

are

given in Table 3-2. A voltmeter

re-

sponding

to

the

average

and calibrated

to

indicate the

rms

val

ue

of

a sine w

ave

will, when

measu

ring Gaussian noise, indi-

cate a

va

lue that

is

low

by the factor 0.

798/0.900

= 0.887

(-1.0

5 dB)

1

•

Voltmeters that respond

to

the true rms value are

quite approp riate

fo

r the

mea

surement

of

noise,

because

they

c

an

indicate the rms

val

ue

wit

hout correction, regardless

of

the

amp

I itude distribut ion.

T

ABLE 3-

2

Rm

s, peak, and full-wave recti fied average voltage valu

es

of various waveforms.

FUL

L-WAVE RECTIFIED

RM

S

PEAK

A

VERAG

E

Sine

Wave

1.0

1.414

(./2)

0.900

(

27

)

Square

Wave

1.0 1.0

1.0

(A)

Gaussian

Noise

1.0

0.798

The response

of

a peak-indicating voltmeter

is

depende

nt

upon the charging and discharging time constants

of

its recti-

fier c

ircuit

s; when random noise

is

measured, e

ach

type

of

pea

k-responding voltmete r may indicate a

different

value. The

resp

onse

time of

a rectified-average-responding

volt

meter is, in

practice, often shorter than that

of

a true rms

voltmet

er, and

it

can

be

used

with

the correction fact or cited above. However,

for

measuremen

ts

without

the correction fac

tor,

or

for

meas-

1

This

and

much other information

concerning random noi

se

is

con·

tained

in a General

Rad

io

publication, "Usef

ul Formulas,

Tables

and

Curves

for

Random

Noise",

Instrument

Note

1 N-1 03

(Ju

ne, 1963).

A

copy

of

this

six-page

compedium

can

be

obtained

f r

ee

of

ch ar ge

by

w r

iting

to

General

Radio,

West

Concord,

Mass.,

0 1781.

LOO

0.

75

0.50

0.25

0

-4.-

v

I

v

v

I

/

-3

a

-2a

2o-

3.-

Figure 3-2. The Gaussian

probability

distribution

function

plotted

as a

func

tion

of

a,

the

root-mean

-

squar

e amplit

ude

.

40"

•

..

urements on non-Gaussian nois

e,

it

is

necessary to

use

a true-

rms instrument.

3.3.4 Measuring

Amplitude

Distribution.

The

amplitude

distribution,

P(v),

can

be

measured by

means

of a circuit

that

measures

the percentage

of

time during

which the noise

voltage exceeds (or does

not

exceed) the volt-

age

level,

v.

Apparatus

for

this purpose generally includes

some

form

of

level-crossing detector and,

for

high-speed opera-

tion,

Schmitt-circuit

wave-sh

apers.

The measurement must

be

made by averaging over a time long enough

to

smooth the

fluctuations in the indication

to

negligible

size.

The amplitude density

distribution,

p(v),

can

be

meas-

ured

by

similar,

but

somewhat more complicated, apparatus

that indicates the percentage

of

time that the noise voltage

exists

within

the range

from

v to

(v

+ dv). In making any

of

these measurements, averaging

is

important,

bacause

only

the

av

erage

characteristics

of

the noise

can

be

measured meaning-

fully.

In the present state

of

the art, l

evel-crossing detector cir-

cuits

can

not

be

made

to

operate fast enough

for

measurements

on random noise containing such high frequencies

as

those pro-

duced by th e 1383. However, measurements

can

be

made

by

sampling the noise at a lower-frequency rate,

such

as

50 or

100 kHz.

If

the sampling efficiency

is

unity,

the sampled-and-

held

waveform

has

the

same

amplitude

distribution

as

the high-

frequency random noise,

but

it

contains much lower frequency

components, and

it

can

be

applied successfully

to

the l

eve

l-

crossing detector circuits mentioned above.

3.3.5

Amplitude

Distribution

of

the Type 1383.

The noise source

used

in the 1383

is

a thermionic diode.

The noise

is

generated

as

shot noise in the plate current

of

the

diode, the

amp

litude distribution

of

which

is

definitely

Gaussi-

an

because

the total current

is

the sum

of

a very large number

of

,independent pulses.2 The amplifiers in th e 1383

have

been

specia

lly

designed

so

that, at

full

output

amp I itude, pulses

be-

low 3a

will

not

be

clipped.

3.4 SPECTRUM.

3.4. 1 General.
The spectrum

of

a random signal

is

different

from

that

of

a periodic signal, which

is

composed

of

one or more discrete

lin

es,

each

of

which corresponds

to

a frequency component

of

the periodic signal. A

truly

random signal contains no peri-

odic

fr

equency components, and

has

a spectrum that

is

a con-

tinuous function

of

frequency.

3.4.2 Spectrum Functions.
The frequency content

of

a random noise

is

described by

a

function

called the spectral intensity, which

has

the dimen-

sions

of

voltage squared per

unit

bandwidth. (When divided

2Bennett

, W.

R.

,

"Electrical

Noise",

McGraw-Hill

Book

Co.,

New

York

(1960),

p.40.

by a value

of

resistance,

it

is

equal

to

the power that voltage

would

dissipate in that resistance, per

unit

bandwidth). The

spectral intensity

is

the Fourier transform

of

the autocorrela-

tion

function,

and

is

the spectrum function most often

used

in

mathematical

analysis

of

random noise.

It

is

not

the most co

n-

venient function

for

practical

use,

~owever,

because

spectra

are

usually measured

as

voltage, rather than voltag e

squared

, in a

given bandwidth, and

filter responses,

used

in shaping noise

spectra,

are

usually

measured

as

voltage functions. Therefor

e,

for

practical

use,

we

define the voltage spectrum

as

numerical-

ly equal

to the square

root

of

the

spec

tral intensity .

It

has

units

of

voltage per

squa

re

root

of

bandwi

dth,

but

may

be

spoken

of

as

voltage in a given bandw idth. Spect

ra

shown in

Figure 3-3

are

plotted

as volt

age

spectra.

3.4.3 White Noise.
Noise whose

spect

ral

intensity

is

constant

ov~r

a range of

frequencies

is

called white noise, by

ana

logy wi th

white

light,

which contains more or l

ess

equal

int

ens

iti

es

of

all visible

colors.

3

White noise cannot contain equal amplitudes at all

frequencies,

for

then the total power in t

he

noise would

be

in-

finite. White noise, therefore,

means

that

the spectrum

is

flat

over the range

of

interest,

for

example,

throughout

the audi

o-

frequency rang

e.

Because

of its

flat

spec

trum,

whit

e noise,is

part icularly

convenient

as a sta

rting point

for

many experi-

ments.

3.4.4

Importance

of

Knowing the Spectrum.

In most experiments involving random noise, kno wl

edge

of

the spectrum

of

the noise being

used

is vita lly

necessa

ry.

When

noise

is

used

as

a driving-po

int

signal to

determine the

response

of

some

sys

tem, the response is meaningful

only

when

the

input

spectrum

is

known, and

is

usual

ly most conveniently

studied when the

input

spectrum is flat. There are,

of

cou

rse,

cases

where other spectra are more convenient.

If,

in such

cases

, a

filter

can

be

constructed whose r

espo

nse has

the

shape

of

the desired spectrum,

white

noise

is

the proper

input for

that

filter

to

produce the desired spectrum at its

output

3.4.5 Noise-Spectra Measurements.
The spectrum

of

a noise

can

be

measured

with

any

wave

analyzer whose frequency

range

is

appropriat

e.

For the out-

put

indication to

be

free

of

fluctuations that

might cause

reading errors, the product

of

analysis

bandwidth and th e

av-

eraging time must

be

large. As in the

measureme

nt

of

the

amplitude

distribution,

the spectrum can only

be

measured

accurately

by

averaging

ove

r a relatively long

tim

e interval.

Wave

analyzers generally indicate the vol

tage

in the

ana

l-

ysis passband. The indi cation

is

therefore propo

rti

onal

to

w(f)

,

not

W(f).

It

is

convenient

to

reduce all measurements

to

a

3Aithough,

as

Bennett

(op.cit.,

p.

14)

points

out,

the

analogy

has

been

drawn

incorrectly,

because

spec

troscopists

were

measuring

Intensity

as

a

function

of wave

length, and

found

it

to

be

substantially

con

sta

nt

per

unit

wavelength,

not

per

unit

frequency.

PROPERTIES OF RANDOM NOISE 3-3

<J>

_J

"'

"'

0

"'

0

0

I

~

-2

_J

"'

~

-3

_J

"'

<!>

..

~

-7

0

>

-8

-9

"'

cr:::

-10

,......,./

v

0 . 1 MHz

J.O

MHz

FREQUENCY

IO

MHz

Figure 3-3.

Typical

voltage spectrum

of

the

1383

Random-Noise Generator.

common bandwidth

basi

s,

and the most-often-used bandwidth

is

one cyc le. Units

for

W(f) are "volts

squared

per cycle band-

w

idt

h,"

and considerable u

se

has

been

made

of

the

unit

"volts

per root-cycle"

for

w(f).

Now

that

"cycles"

have

become

"hertz

," this term

is

even

more cumbersome, and

is

perhaps

best

replaced by

"volts

in a 1-hertz band."

In

order

to

convert

to

volts in a

1-hert

z band,

it

is

neces-

sary

to

divide th e voltage indication

of

the analyzer by the

square

root

of

the

ana

lysis bandwid th. For exampl

e,

using the

General Radio Ty

pe

1900

Wave

Analyzer, mu

ltiply

by the

fa

ctors given in Table 3-3

to

convert measured values

of

ran-

dom noise to volts in a

1-hert

z band.

TABLE

3-3

Correction factors

for

converting voltage indication

of

the Type 1900

Wave

Analyzer

to

voltage in a 1-hertz band.

ANALYZER

BANDWIDTH

3

Hz

10Hz

50 Hz

CORRECTION FACTOR

4

0.650

(-3.

7

dB)

0.357 (-9.0

dB)

0.159{-15.9dB)

4These

numbers include

the

correction

for

the

average-responding

voltmeter

in

the

1900

Wave

Analyzer.

In a constant-p ercentage-bandwidth analyzer, the

analy-

sis

bandwidth

is

directly

proportional

to

the center frequency

of

the

pass

band.

Thi

s necessitates dividing the voltage indica-

tion

by the square ro

ot of

the frequency

as

well

as

by the cor-

rection

factor

for

the fractional bandwidth itself. When using

constant-p ercentage-bandwidth analyzers,

su

ch

as

th e General

Radio Type 1564

Sound and Vibration Analyzer or t

he

Type

1558 Octave-Band Analyzer,

multiply

th e analyzer voltage in-

dication by the appropriate conversion fac

tor

in Table 3-4.

3-4

PROPERTIES OF

RANDOM

NOISE

TABLE

3-4

Correction factors

for

converting voltage indication

of

a

constant-percentage-bandwidth analyzer

to

voltage in a 1-hertz band.

BANDWIDTH

1/10 Octave
1/3 Octave

Octave

CORRECTION

FACTOR

3.80/

JT

2.

08/JT

1.19/JT

3.4.6 Spectrum

of

the Type 1383.

The no

is

e produced by the Type 1383

is white ove

r a wide

range of

frequencies; the voltage spectrum is

flat

within

±1

dB

for

frequencies

from

20Hz

to

10

MHz, and within ±1.5 dB

for

frequ encies

from

10

to

20 MHz. A typical spectrum is shown

in Figure 3-3. T

he spec

trum

is

cut

off

very

sha

rply at 20 MH

z,

so

th at the e

ffectiv

e bandwidth

of

the noise

is

quite

closely 20

MHz.

At

the o

pen-circuit

output

amp

litude of 1 V,

the voltage

spectrum

level

is

224

J..l.V

in a 1-Hz bandwidth.

3.5

STATIONARITY

.

A random noise

is

said

to

be

stationa ry5 if

its various

statist i

cal para

mete

rs,

such

as

the amp I itude

distribution

and

the spectral

int

ensity, do

not

change with time. Random noise,

of

course, never repeats the

same

pattern

from

one moment

to

the next, but,

if it

is

stationary, many measurements

of

the

spec

trum made at

different

times

will

all indi cate the

same

re-

sult, except

for

the unavoidable errors

of

measuring a random

quantity

in a

finite

time. In discussing tests

for

stationarity,

Bendat and Piersol

6

po

int

out

th at,

for

most nois

e-ge

nerating

5sennett,

op.

cit.,

p.

52-54

.

6sendat, J.S.,

and

Piersol,

A.

G.,

Measurement

and

Analysis

of

Random

Data,

John

Wil

ey

and

Sons,

Inc

.,

New

York,

1966, pp.

219-223.

processes,

it

is suffi

cient

to

determine

that

the

mean

and the

varian

ce

(square

of

the standard deviation,

a)

do

not

change

with th e time at

whi

ch

they are measured.

Because

the

output

of

the 1383 is

ac

coupl

ed,

the

mean

is

automatically zer

o,

and

it

is

only n

ece

ssary

to observe the r

ms

amp! itude

to

prove

stationa

rit

y. This

can

be

done by

seeing

that

the fluctuations

in long-time recordin

gs

of th e amplitude

of

the noise are no

greater than the value predict

ed

from the

bandwidth

of

the

noise and the smoothing time

of

the detector.

The importance of stati ona

rity

in a random-noise genera-

tor

is analogous

to stabilit

y in

an

osc

illat

or; the

user

is

assured

th at there is no chan

ge

in th e spectru m

or

the amplitude distri-

buti on during the cour

se

of

an

experiment. The stationarity

of the

noise

output

of

the 1383 comes, first

of

all,

from

its

noise

source;

the temperature-limited thermionic diode

has

long been r

ecog

nized and

used

as

a standard noise

source

for

nois

e-

figure

measurements of high-frequency amp!

ifi

ers. 7 The

noise current

it

produ

ces

is proportional to the square root of

7spa

ngenberg,

K.

R.,

Vacuum

Tubes, M

cGraw-Hill

Book

Co., Inc.

New York ,

1948,

p,

307,

the

de

plate current , which, in the 1383, is held constant by

feedback cont ro

ll

ing the filament current. The gain

of

the

noi

se-cu

rrent amp!

ifi

ers

is

stabili

zed

by feedback.

3.6 SUMMARY.

Because vari

ous

ter

ms

used

in speaking

of

random noise

are

some

times confused, a summary is presented here of the

most-often-used

word

s,

together

with

a brief exp lanation of

their

meaning: "Noise"

is

any unwanted signal.

"Random

noise"

is

a si

gna

l whose future value cannot

be exac

tly

predict-

ed

and

that

does

not

contain any periodic componen

ts.

To

diffe

rent iate

clea

rly

between the spectrum and the amp! itude

distribution, in this book the word

"densi

ty"

is

used only

in

co

nnec

tion

with

the amp

litud

e distribution. The word

"inten-

s

ity''

is

used

only

in connecti on

with

the spectru m. "Gaussian"

appli

es only to t

he

amplitude dis

tribution

and refe

rs

to a pa

r-

ticular theoretical distribution.

"Whit

e" refers o

nly

to

the

spect

ru

m,

and means

that the

spec

tral

int

ensity is constant

over some

ran

ge

of

interest.

PROPERTIES OF RANDOM NOISE 3-5

Principles

of

Operation-Section

4

4.1

DESCRIPTIONOFC

IRCUIT ...

...

.

......

.

.....

.

..

4·1

@OUTPUT

1383·9

Fi!PJre

4-1. Block diagram

of

the

1383

Random-Noise Generator.

4.1

DESCRIPTION OF

CIRCUIT

.

Figure 4·1

is

a block diagr

am

of

the Type 1383

Random- Noi

se Generator. The noise source is a the rmon ic

diode operated in

th

e temperatur

e-l

imited mode. T

he

noi

se

o

utp

ut of

suc

h a diode operated in this way

is

exactly

Gauss

ian,

it

is spectr

ally flat

to

ext

remely high frequenci

es,

and it

s l

eve

l is pro portional to the square

root

of

the de plate

curren

t. To keep the amplitude stable, the filament current

of

the noi

se

di ode

is contr

oll

ed

by feedback,

to

maintain a

co

nsta

nt curr

ent. The noi

se

ou t

put

of

the diode

is

amplified

in

4-1 PRINCIPLES OF OPERATION

the frequency range from 40 to 80 MHz. By heterodyning
aga

inst a 60-MHz l

ocal osc

illator, the noise frequency is

tr

ans

lated

to

the 0-to-20-M Hz band. A sharp-cuto

ff

low-

pass

fil

ter

ensures

that higher noi

se frequenci

es

and residual

l

oca

l-osci llator signals are removed. An ac-coup led amplifier is

used

to

increase the power

of

tha t noi

se

to the o

utput

level of

1 V. The voltmeter (whi

ch

indicat

es

the o

utput

leve

l)

and the

output

attenuator complete the circuit

. A ll power s

uppli

es

are

regulated except the

plate supply to the no

ise

di od

e.

•

..

Operat

ing

Proc

edure-

Section

5

5.1 GENERA

L.

5.1

GENERAL

...........

. .

5.2

OUTPUT

LEVEL

CONTROL . . .

5.3 MET

ER' FULL

SCALE CONTROL

5.4 OUTPUT CONNECTIONS

..

5.5

OUTPUTIMPEDANCE

5.6

MODIFYING

THE OUTPUT

With the instrument in position on the bench or installed

in a relay rack,

set

the screwdriver-operated slide switch S502

(4, Figure 1-2)

to

the

range corresponding

to

the power-line

voltage. Connect

the instrument

to

the line power, using the

power

ca

ble supplied (P/N 4200-9622),

and

turn on the

POWER

switch.

Follow

the instructions given

in

paragraphs 5.2

and

5.3

for

sett i

ng the OUTPUT

LEVEL

and

METER

FULL

SCALE

controls.

5.2 OUTPUT

LEVEL

CONTROL.

The OUTPUT

LEVEL

control

is

a continuous rotary

control by

means

of

whi

ch

the

output

level

can

be

set

at any

selected value between its maximum open-circuit value

and

ze

ro. The open-circuit

output

voltage

is

indicated by the meter

on the

front

panel, wh ich must

be

read

on the

scale

appropri-

ate

to

the setting

of

the

output

attenuator (the METER

FULL

SCALE control).

5.3 METER

FULL

SCALE CONT ROL.

The METER

FULL

SCALE control

is

the

output

attenu-

ator and permits reduction

of

the output-voltage

level

by 80

dB

from its maximum, in 10-dB

steps.

Th e voltage indicated

is

the open-cir

cuit

output

voltage; when the

output

is

loaded by

50

n,

the

output

voltage is reduced by half. Decibel readings

on

the dial

of

the METER

FULL

SCALE control

can

be

added

to

the decibel indication

of

the meter

to

obtain the open-cir-

cuit

output

vol

tage

in decibels below 1 V.

5.4

OUTPUT CONNECTIONS.

T

he

output

connector on the

front

panel

is

a GR874,

locking-type, coaxial connector. Generally, the

output

shou

ld

be

taken by

means

of

a mating G R874 connector

into

a closed

.

5-1

.

5-1

.

5-1

.

5-1

.

5-1

. 5-1

coaxial system. Adapto

rs

to other types

of

high-frequency

connectors are

available (refer

to

Table 1-4). The

output

con-

nector

can

be

moved

to

the rear panel

if

more convenient,

as

when the instrum ent

is

mounted

in

a relay rack (refer

to

para-

gr

aph

2.4 and Figure 8-2).

5.5

OUTPUT IMPEDANCE.

The

output

impedance

of

the 1383

is

50 ohms, ±2%.

Th e

output

can

be

sho

rt circuited

without

causing

distortion

of

the

output

current. The maximum

output

current

into

a

short circu

it

is

20 mA, rms,

with

occasional peaks that may

exceed

four

tim

es

that value.

5.

6 M

ODIFYING

THE OUTPUT.

5.6.1

Producing Lower Levels.

GR874-G fixed coax

ial

attenuato

rs

(refer

to

Table 1-4)

in reducing the

output level

beyond the

range of

the 1383

out

-

put attenuator (th e METER

FULL

SCALE control).

These

units are

avai

lable

with

attenuations

of

3,

6, 10, 14,

and

20 dB.

They

are

designed

for inse

rti

on in a 50-ohm line.

5.6.2 Generating Band

s of Noi

se.

It

may

be

necessary

to rest

rict

the bandwidth

of

the

noise output

of

the 138

3.

For inserting a tuned cir

cuit

or

filter

in series

with

the 50-ohm

output,

it

may

be

convenient

to

use

the GR874-X insertion

unit,

which permits totally-shielded

connection

of

any circu

it

that

will

fit

in its 2-inch long, 9/16-

inch-diameter

space.

5.

6.3

Generatin

g H

igher

Levels.

The noise generated by the 1383 Random-Noise Genera-

tor

can

be

amplified by any amplifie r whose frequency

range

is

adequate. The high crest factor

of

Gaussian

noise must

be

kept

OPERATING PROCEDURE 5-1

in mind

in

choosing the power rati

ng

of

the amplifier

so

that

the noise

will

not

be

clipped. In order

that

peaks

of

3a

be

passed

without

clipping, the amplifier must

be

capable

of am-

plifying

a sine wave

without

distorti

on

to

a power l

eve

l 4.5

times greater than the

average

noise power desired.

5.6.4

Generating Noise at Higher Frequencies.

Noise at higher frequen c

ies

can

be

gen

erated by using a

double-balanced mixer

to

modulate a high-frequency carri er

from

an

oscillator or signal generator. Th e result

will

be a band

5-2

OPERATING

PROCEDURE

of

noi

se

40 MHz wide, centered on th e carrier frequency.

(There

will

be

a notch

40

Hz wide at th e carrier frequency.

1

)

The

degree

of

discrimination

aga

inst th e carrier and the upper

ca

rrier frequency

that can

be used

will

depend upon th e char-

ac

teristi

cs

of

the mixer use

d.

Many

such

mixer

units

are com-

mercially available.

2

1

Perhaps

wider,

depending

upon

the

characteristics

of

the

mixer

.

2Relcom,

E. G. ,

Mountain

View,

Cal.

'

•

Applications-

Section

6

6.1

GENERAL

......

.

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

. .

6·1

.

6-1

.

6-1

.

6-1
. 6-1
. 6-2
. 6-3

6.2

SIMULATION

OF BACKGROUND NOISE

....

.

6.3

MEASURit\G

INTERMODULATION

DISTORTION.

6.4 MEASURING CROSSTALK

...........

.

6.5

MEASUREMENT

OF

EFFECTIVE

BANDWIDTH.

6.6 NOISE TEMPERATURE

....

..

. .

6.7

NOISE FACTOR

OR

NOISE FIGURE

......

.

6.1 GENERAL.

The Type 1383 Random-Noise Generator

is useful where-

ever

a broad-band, high-level source

of

white

noise

is

needed.

Its 50-ohm

output

impedance and spectral intensity that

is

substantially constant

to

20 MHz make

it

particularly useful at

radio frequencies.

For audio-frequency

applications, Types

1381

and

1382

Random-Noise

Gene

rators1 may

be

found

to

be

more useful.

They

are

intended

for

applications

in

the fields

of aco

ustics,

electroacoustics, psychoacoustics,

and

vibration analysis, in ad-

dition

to

their general

use

as

audio-frequency generators

of

random electrical noise.

6.2

SIMULATION

OF BACKGROUND NOISE.

In studying the performance

of

radio, telemetry, radar or

sonar systems

with

regard

to

their

ability

to

transmit, detect,

and

recover signals in noise,

it

is

convenient

to

simulate the

r

eal

mixtu

re

of

signal and naturally occurring noise by adding

noise

of

controlled

cha

racteristi

cs

to

a standard signal. Noise

sometimes becomes the

signal itself in tests

of

correlation

re-

ceivers

and

other modern signal-processing systems.

A

mixture

of

signal

and

noise

can

be created by adding

the

output

of

a signal generator (possibly modulat ed in

some

appropriate m?nner)

to

the noise from the 1383. This c

an

be

accomplished

with

the GR874-TPD or GR874-TPDL Power

Divider

(see

Table 1-4),

with

which signals in two 50-ohm

systems

can

be

added together. Noise that

has

been

hetero-

dyned

to

higher frequencies

(see

paragraph 5.6.4) c

an

be

used

for

this purpose.

6.3 MEASURING

INTERMODULATION

DISTORTION.

Random noise

is

used

in

one very effective method

of

measuring intermodulation distortion. 2 White noise, which

1

Faran, J.J.,

Jr., "Random-Noise

Generators", General

Radio

Experimenter

Vol. 42, No.1

,

pp.

3-13

(January, 1968).

2MIL

STD-1886.

has

been

passed

through a band-stop

filter

that reduces the

level

of

the noise by,

say,

80 dB over a narrow

range

of

fre-

quencies,

is

applied

to

the

input

of

a system. Spectrum

meas-

urements

of

the system

output

indicate how much the

"notch"

in the noise spectrum

has

been

filled in by intermodulation

products. This

is

an

especia

lly

significant

measu

rem-ent

be-

cause

white noise contains all the frequencies

to

whi

ch

the

system responds,

and

represents,

in

this

sense,

a "worst-case"

type

of

test signal.

6.4 MEASURING CROSSTALK.

White noise

is

a very appropriate signal

for

use

in

meas-

uring crosstalk in multichannel telephone, radio, or telemetry

systems. Spectrum analysis

of

the crosstalk signal identifies

the frequencies that

cause

the greatest disturbance, thereby

providing some

assistance

in determining the

cause

and specify -

ing a cure.

6.5 MEASUREMENT OF EFFECTIVE BANDWIDTH.

When

wave

analyzers or filters (or more complex

sys-

tems)

are

used

to

measu

re the spectral density

of

noise,

it

is

necessary

to

know the effecti

ve

bandwidth

of

the

filter

or

of

the system. The effective noise bandwidth can·

be

thought

of

in terms

of

an

ideal

filter

having a rectangular frequency char-

acteristic (constant over a

range

of freq

uencies, and zero every-

where else). The effective noise bandwidth

of a filter

is

the

width

of

the

pass

band

of

the ideal

filter

whose ou

tput

is

ex-

actly equal

to

the

output

of

the actual

filter when

the inputs

are

the

same

white noise, provided the maximum transmissions

of

the

two

filters

are

the

same.

It

can

be

measured

by finding

the

total signal transmitted when white noise

of

known

spec-

tral

level

is

applied

to

the input. The frequency

range

of

the

white noise must

include all frequencies

for

which the

filter

being

measured

has

appreciable transmission.

When

the effective bandwidth

of

the

input

noise

is

known, the

necessary

computations

are

simplified. Then the

APPLICATIONS

6-1

effective bandwidth

of

the

filter

is

whe

re

EBWn

is

the effective bandwidth

of

the noise;

Nout

is

the

output

noise voltage;

Nin

is

the

input

noi

se

voltage;

Gfmax

is

the maximum or

peak

gain

of

the

filter

(as

measured with a sine-wave signal).

The effec tive bandwidth

of

the noise

output

of

the 1383

is

very close

to

20

MHz. In measuring the

output

voltage,

it

should

be

kept in mind that the voltmeter

used

should respond

accurately

to

frequencies

as

high

as

20 MHz

and

its operation

(average,

peak, or r

ms)

should

be

known (refer

to

paragraph

3.3.3). The

voltmeter should

not

be

connected at the

end

of

an

unterminated cable,

but

should either terminate the cable

(if

a 50-ohm

input

adaptor

is

available) or should

be

bridged

onto

a terminat

ed

cable.

6.6 NOISE

TEMPERATURE

.

6.6.1

Definition.

It

is

sometim

es

convenient

to

express the noise

level

in a

circuit

in ter

ms

of

noise temperature. The noise voltage

across

a r

esi

stance due

to

thermal agitation

of

the free electrons in

it

(thermal noise)

is

where

en

is

the rms noise voltage,

k

isBoltzmann'sconstant(1.38X

10-

23

joules/°K),

Tis

the absolute temperature

of

the resistance in o K,

R

is

the resistance in ohms,

and

B

is

the bandwidth in hertz in which the noise

is

be-

i

ng

observed.

When

an

artificially-generated noise voltage,

ea,

is

im-

pr

essed

across a resistance,

it

adds

to

the thermal noise

whose

amplitude

is

given above.

It

is

then possible to

define noise temperature

as

that temperature at whi

ch

the thermal noise power would equal the total noise
power

3

:

(6-1)

Because

noise temperature depends upon the square

of

the

noise

voltage,

such

values

can

become extraordinarily

large;

for

example, the noise temperature

of

the

output

of

the 1383 at

full

output

is

1.8 X 10

13

o

K.

Noise tem-

perature

is

most useful in describing the equivalent input

3More

complicated (and

more

precise)

definitions

are

given

in

"IRE Standards

on

Electron

Tubes: Definitions

of

Terms,

1962

(62

IRE

7.S2)",

Proc. I

EEE

51,

pp. 434-435

(March, 1 963)

.

6-2 APPLICATIONS

noise

of

high-frequency receivers and amplifiers, where,

incidentally,

for

certain types

of

circuits, the equivalent

input

noise temperature

(see

below)

is

considerably lower

than the ambient temperature.

The noise temperature

of

the

output

of

the 1383

can

never

be

less

than its actual temperature,

because

its

output

circuits

are

comprised

of

real

resistances.

Fi[r

ure

6-1

shows how the noise temperature

of

the

output

varies

with

the amount

of

attenuation when the OUTPUT

LEVEL

control

is

set

so

that the meter indicates

full

scale.

Attenuation up

to

80 dB

is

available

with

the

METER

FULL

SCALE control; additional attenuation

must

be

obtained

with

external attenuators such

as

G R

874-G units (refer

to

paragraph 5.6.1

).

As

is

readily

apparent, the noise temperature levels

off

at 290° K

(23°C)

as

the attenuation

is

increased (assuming the noise

generator and attenuators

are

at 23°C).

6.6.2 Measurement

of

Effective

Input

Noise Temperature.

The effective

input

noise temperature

of a re-

ceiver or amplifier

is

the temperature at which the

re-

sistive component

of

the

input

source

would

gene

rate

an

amount

of

noise exact

ly

equal

to

that arising in the

receiver or

amplifier only.

One

procedure

for

measuring

the effective

input

noise temperature involves knowledge

of

the effective noise temperature

of a source

under both

hot (on) and

cold (off) conditions.

4

For amplifiers

intended

for

operation

from

a 50-ohm source, the effec-

tive noise temperature

of

the

output

of

the 1383 wh

en

on

can

be

read

from Figure

6-1

or calculated

from

equation

6-

1,

paragraph 6.6.1. The effective noise temperature when

the noise generator

is

off

is

the temperature

of

the noise

generator (and its

output

attenuators). Normal room

temperature

(290°

K)

is

often a close-enough approxima-

tion.

The measurement

is

made

by connecting a noise

generator

to

the receiver and measuring the

output

power

when the noise

gene

rator

is

cold

off

and

hot

on. The

effective

input

noise temperature

is

then

where Tih

is

the noise temperature

of

the source when

it

is

hot

(on),

and

Ti c

is the noise temperature

of

the source when

it

is

cold (

off

),

Poh

is

the

output

power when the source

is

hot

(on),
Poe is the

output

power when the source

is cold

(off).

4for

an

excellent

discussion

of

noise

temperature

and

noise-

figure

measurements,

refer

to

Mumford,

W.W.,

and Scheibe

,

E.H.,

Noise

Perfonnance

Factors in

Communication

Systems,

Horizon

House-

Microwave, Inc., Dedham,

M ass. ( 1

968).

10,000

~0

00

z

~

300

0

""

(/)

w

w

a:

200

(.!)

w

0

~

w

a:

::>

....

0

~

1000

w

"-

::E

w

....

w

(/)

0

z

~0

0

-

-

t--

-

--

_L

/_

I

-

I

I

~

1/

I

I

--

I

I

I

I

1/

J

v

300

290"K-

20

0

-1

40

-1

30

-120

-110

__]_

-1

00

-9

0

OUTPUT

LEVEL

IN

dB

RE

t VOLT nn-1

Figure 6-1. Noise

temperature

at

the

output

con-

nector

of

the

1383

as a

function

of

the

level in dB

re 1

V, rms.

Output

impedance

50

D.

temper·

ature 23°C

(290

°K).

Additional

attenuation

beyond

80

dB

provided

externally.

6.7 NOISE FACTOR OR NOISE FIGURE.

6.7.1 Definitions.
The noise factor,

F,

of

a receiver or amplifier

is

the

ratio

of

the

tot

al

output

noise power

to

that portion

of

the

output

power that is due

to

thermal noise

in

the

source.

5

It

is thus the amount by which the

output

noise

is

incr

eased

because

of

noise in the amplifier over

what

it

would

be

if

the thermal noise in th e source

was

amplified by a perfect (noise-free) amplifier. In

gen

-

era

lly

accepted

useage, "noise

figure"

is

the noise factor

exp

res

sed

in decibels,6 i.e., "noise figure"

is

10 log

F.

6.7.2 Measurement

of

Noise Factor or Noise Figure.

The

simplest and most c9nvenient method

of

meas-

uring the noise factor

of

a receiver or amplifier

is

usually

by use

of

a noise generator. The

measu

rement

is

similar

to

that

used

in the determination

of

effective

input

noise temperature. The noi

se

factor

is

(

Tih )

(Ti

c )

F

=

2§0-

1 -

(P

0 h/P0

c)

29Q-

1

(Poh/Pod-

1

where Tih

is

the noise temperature

of the

source when

it

is

hot

(on),

and

Tic

is

the noise temperature

of

the sour

ce

when

it

is

cold(off),

Poh

is the

power

output

when th e source

is

hot

(o

n),

Poe

is

the power

output

when the

source

is

cold

(

off

).

When

Tic

is

290°K, the formula simplifies to

F

Tih

29o-

1

Poh

--1

Poe

For more detailed discussion

of

noise factor and

noise fi

gu

re

and

the measurement thereof , the reader

is

referred

to

the

lit

eratur

e,

footnotes 4 and 5,

thi

s section.

5More

complicated

(and

more

prec

.ise)

definitions

are

given

in

Haus, H.A., et

al, "Description

of

the

Noise

Performance

of

Amplifiers

and

Receiving

Systems",

Proc.

IEEE

51,

PP.

436-442

(March,

1963),

Appendix.

6Mumford and

Schiebe,

op,cit.,

p. 69.

APPLICATIONS

6-3

Service

and

Maintenance-Section

7

7.1

SERVICE .

..........

.

......

. .

7-1

.

7-1

. 7-5

. 7-6
.

7-7

.

7-7

.

7-7

7.2

MINIMUM

PERFORMAN

CE

STANDARDS.

7.3 RECALIBRATION .

..

7.4 TROUBLE ANALYSIS .

7.5 KNOB

REMOVAL ...

7.6

KNOB

INSTALLATION

7.7 PILOT-LAMP

REMOVAL

7.1 SERVICE.

Our

two-year warranty attests the

quality

of

ma-

terials and workmanship in our products. When

dif-

iculties do occur, our service engineers

will

assist

in any

way possible.

If

the

difficulty

cannot

be

eliminated by

use

of

the

following

service instructions,

please

write

or

phone

ou

r Service Department

(see

rear cover), giving

full

information

of

the

trouble

and

of

steps taken

to

remedy

it.

Be

sure

to

mention the type serial and I D numbers

of

instrument.

Before returning

an

instrument

to

General Radio

for

service,

please

write

to

our Service Department or nearest

District

Office, requesting a Returned Material Tag.

Use

of

this tag

will

ensure proper handling and identification.

For instruments

not

covered by the warranty, a purchase

order should

be

forwarded

to

avoid unnecessary delay.

7.2

MINIMUM

PERFORMANCE STANDARDS.

7.2.1

General.

The

two

most

important

items

to

be

measured in

checking a noise generator

for

conformance

to

specifica-

tions

are

the spectrum and the amp I itude

distribution.

Both

of

these

are

com pi icated and tedious measurements,

requiring a number

of

pieces

of

equipment. Instruments

have

been

constructed especially

for

this purpose at

General Radio and

are

used

in checking noise generators

before they

are

shipped. The performance

of

this special ly

constructed equipment

is

not

readily duplicated by com-

mercially available instruments. However, given below

are

lists

of

equipment and instructions

for

checking these

characteristics

as

well

as

possible,

with rea

dily

available

apparatus.

7.2.2 Checking the Spectrum.

General.

The spectrum

of

the noise

output

of

the 1383

covers

an

extremely wide frequency

range

(20 Hz

to

20 MHz). No single

wave

analyzer covers this range.

Measurements, therefore, must

be

made

with

severa

l

analyze

rs

that may operate in

different

ways, particularly

with

regard

to

bandwidth and detector characteristics.

Because

of

the

difficulties

of

calibrating some

of

them,

it

is

recommended that the analyzers

be

used

to

check the

flatness

of

the spectrum, rather than

to

make abso

lute de-

terminations

of

the voltage spectrum level at

each

fre-

quency.

Spectrum.

A I ist

of

equipmen t

that

can

be

used

to

check the

flatn

ess

of

the spectrum

of

the 1383

is

given in Table 7-1.

Connect the

output

of

the 1383

to

the

input

of

either the

Rhode

& Schwarz Type USVH Selective Microvoltmeter

(Figure 7-1)

or

the Hew

lett

Packard Model

312A

Wave

GR

874

-R22A

PATCH

CORO

R&S

USVH

SELECTIVE

MI

CROVOLT

METER

R8S

FLA209'90

ADAPTOR

1383

-.t

Figure 7-1. The R & S

USVH

Microvoltmeter can

be

used

to

check the flatness

of

the spectrum

from

25

kHz

to

20

MHz.

SERVICE

AND

MAINTENANCE

7-1

GR

874·R22A

PATCH CORD

GR

874 -OBPA

HP

312A

WA

VE

ANALYZER

ADAPT

OR

13B3.~

Figure 7-2. The spectrum flatness

can

be

checked

from

25

kHz

to

18 M

Hz

with the HP model

312A

Wave Analyze

r.

Analyzer (Figure 7-2), and

set

the

input

impedance at

50 S1. With th e full 1-V, r

ms,

out

put

of

the 1383, the volt-

age delivered

to the 50

S1

load

of the

analyzer will

be

0.5 V.

Set

th e attenuators

of

the wave analyzer accordingly, and

tune across the range

fr

om

25

kHz to

20

MHz (necessarily

stopp ing at 18 MHz in

the case

of

the

HP-

312A). Record

the meter indi

ca

ti o

ns

as a function

of

frequency. This is

the voltage

spec

tru

m l

eve

l on

an

arb

itr

ary

sca

le.

To

measu

re the spectrum at frequenci

es

below

20 kHz,

use

th e G R

Type

1564 Sound and

Vibration

Ana-

lyzer connected

as

shown in Figure 7-3. Th e bandwidth

of

the noise should be reduced before

it

is

connected

to

the

1564. The simp

le

filter

shown in Figure 7-4

can

be

con-

struct

ed

in a GR 874-X Inserti on

Unit

for

this purpose.

This fi

It

er is designed for operati on

from

a 50-ohm source

into

an

open circuit (impedan

ce

high compared

to

50

ohms).

Place

this

filter

at the out

put

of

th e 1383 and co

n-

nect

it

to

the input

of

the 1564 by a shielded

cable.

(Use

an

874-02

Adapto

r and a 1560-P95

Adaptor

Cable.

See

Table 1-4.) A

measu

rement made at

25

kHz (in the 1/3-

octave band) corresponds

to

the level measured

with

th e

high-frequency wave analyzer, and provides the transfer

to

a new a

rbitr

ary

sca

le for

thi

s analyze

r.

The 1564

is

a con-

stant-percentage-bandwidth analyze

r.

Subsequent voltage

GR

1560-

P95

ADAPTOR

C

ABL

E

GR

1~64

SOUND

AND

VIBRATION

ANALY

ZER

Figure 7-3. Connect ions

for

checking the spectrum

at frequencies

below 20 kHz.

IN

OUT

c

I

00

47p.F 0

Figure 7-4. Low-pass f ilter

to

be

built

into a

GR874-X

Insertion

Unit

and

used with a 5G-

n

Termination

Unit.

7-2

SERVICE

AND

MAINTENANC

E

measurements made at lower frequencies must be

mu

lti

-

plied by the

factor

v'25000/f

to

find

the voltage

that

would

be

measured

by

an· analyzer having constant

bandwidth.

The amount

by

which the resultant number

diff

ers from

that measured at 25 kHz

is

the departure

from

perfect

spectral flatness.

7.2.3 Amplitude Distribution.

As mentioned above, specially constructed equ ipment

is

used

at General Radio

for

checking the

amplitude

distribution

of

noise

gene

rato rs before they l

eave

the

fa

cto

ry. Customers fami I iar

with

amp I

itude distribution

measurements may

have

suitable equipment on hand, or at

least

wil

l understand what sort

of

equipment is necessary,

and

how

to

assemble it. Others must make

use

of

commercially available amplitude

distribution

analyzer

s,

two

of

which

will

be

discussed here.

A list

of

equipment tha t

can

be

used

in checking the

amplitude densi

ty

distribution

is

included in Table 7-1.

Sampling Unit

Necessary.

Regardless

of

what equ ipment is

used for the

measurement, there

is

one important consideration in

connection

with

the 1383: The bandwidth

of

the noise

produced by

it

is much

too

wide

for

any conventio nal

amplitude distri

bution

measu

ring equipment. This probl em

can

be

overcome by using sampling t

ech

niques

to

reduce

the

bandwidth

of

the noise signal wh ile preserving the

amplitude

distribution

characteristi

cs.

This

is

most

eas

ily

done

with

a sampling osci lloscope, which makes

availab

le

as

an

output

the "sampled-and-held" waveform. One such

is

the Tektronix 1S1

Sampli

ng

Plug-in

Unit.

It

should

be

triggered

from

an

external source

of

puls

es

at, say, a 20-kHz

rate; the resulting rectangular

samp

led-and-held wave

form

is

eas

ily

processed by amplitude

distribution

ana

lyzers

int

ended

for

audio-frequency

use.

An impo

rtant

precaution in the

use

of

such a

samplin g system

is

that the " sampl i

ng efficiency'fnust

be

adjusted

to

unity.

Otherwise the hold capacitor will

not

be

charged

fully

to

the val

ue

of the noi

se

waveform at the

sampling

in

sta

nt,

and the resulting

output

at

each step will

be

some sort

of

average

over the previous few sampl

es;

the

amplitude

distribution

of

the samp led-and-held ou

tput

will

not

be

representative

of

the noi

se.

The manufacturer's

procedure should be followed in setting

th

e samp ling

efficiency

to

unity.

When usi

ng

the

Tektronix

1 S1, connec t the

output

of

the 138 3 by a 50-Q cable

to

the 50-Q

input

of the

sam

piing

unit

. To avoid overloadi

ng

the sampl ing

unit,

adequate

attenuation should

be inserted

ahead

of

the sampler. This

can

be

done convenientl y

with

th e o

utput

attenuator

of

the

1383.
It may be necessary

to

use a buff

er ampl

ifie

r at the

output

of

the sampling

unit,

ahead

of

the

amplitude

distribution

analyzer,

eit

her to increase the signal

amplitude

TABLE 7-1

Eq

uipment

required

for

checking

minimum

performance standards.

I

NSTRUMENT

REQUIREMENTS

RECOMMENDED

TYPE

(o

r equivalent)

Analyzer

Analy

ze

r

Low-pass

Filt

er

25kHz-

20 MHz

20H

z-2

5kH

z

(See

Figure 7-

4)

>100

MHz

input

Rhode & Schwarz

Typ

e

USVH

Selective

Microvo

ltmet

er or

Hewlett-Packard

Model

312A

Wave

Analyzer

(usable

to

18 MHz)

G R Type 1564 Sound

and

Vibrat

ion Analyzer

Build

in

GR874-X

Insertion

Unit

Sampling
Oscilloscope

bandw

idth, 50S1

input

impedance, samp l

ed-a

nd-he

ld

ou

tput

avai

lable

Tek

tronix

Model 1

S1

Samplin g

Unit

in any

Te

ktronix

Typ

e 530,

540,

or 550

Osc

illoscope

Pul

se

Gener

ator

10-ps pul

ses

at

20-kHz rate

GR

Type 1340

Buff

er

Amplifier

Input

imp

edance

> 100

kS1 bandwidth

>200kHz,

voltage

gain

of

10,

distortion

< 1

%.

Hewle

tt

-Packard

Mode

i465

-A

Amplitu

de

Distributi

on

Analyzer

B & K Model 161 or
Ouan-Tech Mod el 3

17

Counter

Counts

at 10-MHz rate,

multipl

e-pe

riod operati

on

GR

Type 11

91

or to lower th e impedance

of

the sampled-and-he

ld

signal.

If

a

buff

er ampl ifi er is used, it is extremely

important

that

it hav

e low distorti on,

as

even

sma

ll amounts

of

non-

lin

ea

r disto

rti

on

can

have a se

rious

effect

on the amplitude

distribu t ion

of

a random noise si

gna

l.

Use

of

the

B & K Model

161

Amplitude Distribution

Analyzer.

The B

& K Model

161

Amp

lit

ude Distribu

tion

Analyzer will

measu

re th e amp

litud

e d

ensity

distri

bution

of

rand

om n

oise. Wh

en making such measurements on the

output

of the 1383,

samp

ling techniqu

es

will

be necessa

ry.

(S

ee

above

).

In conjunction

with

a sampling

osc

ill oscope, a

buff

er amplifier will probably

be

necessary

to

bring the

signal to

an

adequate level. The amp

lifi

er s

hould

have

disto

rti

on

well under 1% and ba

ndwidth

f lat

to

200k

Hz or

mo r

e.

Measurements made with the B & K Mode l 1

61

should

be

made according to the manufacturer

's

instructions. Th e

window width

of the Model 161 is 0.1 a

while the spec

ifi

cations

of

the 1383 are given in terms

of

a

window

of

0.2

a.

The

spec

ifi

ed valu

es,

if

divided

by

2, will

gi

ve values for a

window

of 0

.1 a with

adequate accuracy.

It will

not

be

poss

ible

to read

the panel meter of the B & K

1

61

with

suff ic ient accu racy

for

measu

rements at 3 a.

Use

a

counte r

with

the digital ou

tput

accordi

ng

to

the

manufacturer's instructions. The test setup

is shown in

Figure

7-

5.

SERVICE AND MAINTENANCE 7-3

GR

777-03

ADAPTOR

TEKTRONIX

54

3

GR874-R33

j

PATCH CORD

GR 1

383

RANDO

M- NOISE

G

ENERAT

OR

S

AM

PLING

OSCILLOSCOPE

GR 1340

PULSE

G

ENERATOR

GR

874-0BPA

ADAPTOR

GR 119 1

COUN

TER

1383-7

Figure 7-5. Test setup

for

measuring the amplitude

density distribution

us

ing the B & K Analyzer.

Use

of

the Ouan'Tech Model

317

Amplitude Distributi

on

Analyzer.

Th

e Ouan-Tech Model 3

17

Amp

lit

ude Distribution

Analyzer will not m

easure the amp

lit

ude density, but

will

me

asu

re the amplitud

e dis

tributi

on. Wh

en

it

is

used with

the Te

ktr

onix Model 1 S1 Sampli

ng Unit

, no

buffe

r

amplifier is n

ece

ssary. Compari

son

of

measured val

ues

of

the ampl

itude distributi

on

fun

cti on with those for

the

Gaussian

distr

ibut

ion given in Table 3-1 will sh

ow how

closely the distr

ibuti

on

function

is Gauss

ian. Initi

al

adjustment of the

input

level will have to be made w

ith the

front

pan

el

ATTEN and

VAR

ATTEN contr

ols. An

adequate way

to

pro

ceed is

to

offset the LE

VEL contr

ol

(which sets the value of sig

ma

at which the

meas

urement is

made)

fr

om its mid-ran

ge

value by one unit (correspondi

ng

to

one

a).

Th e

full

ran

ge

of

thi

s co

ntr

ol is pl

us

and min

us

5

a.

The

att

enuators should then be set

so

that

the meter

indic

at

es 15.8 percent. Then,

if

the LEVEL co

ntr

ol is

turned

tw

o units

from

mid-range, the meter should indicate

2.27%, et

c.

The ma

nufacturer

's inst

ructions will

be

found

he

lpful.

The test setup

is shown in Figure 7-

6.

GR 874-R22A

TEKT

RON

IX

54 3

PATCH CORD

SAMPLING

\

OSCILLOSCOPE

GR 138 3

~

RANDO

M- NOISE

'

GE

NE RATOR

}--'

~

T

.

7.2.4

Other Tests.

Output Attenuator Accuracy .

T

he

accuracy

of

the o

utput

att

enuator

can

be checked

by compari

son

with some other

att

enuator such as

that

in

t

he

Rhode & Schwarz USVH Selectiv

e Microvo ltmeter. The

compar

ison can

be

made at any frequency w ithin the r

ange

of

the

two

ins

tru

ments, using the noi

se

as the test signal.

Voltmeter Accuracy.

Th e volt meter can be checked to its specif ied

acc

uracy of ±5% by using a Ballantin e Model 3

23

True-rms

Voltmeter

as

a standard. Connect it

to the

output

of the

1383 by a

ca

bl e that is terminated at the voltmeter with

an

874

-W5

0B 50-

Sl

Termination, using an 874-T T

ee

and

an

874

-0B

PA

Adaptor (GR874

to BNC) to connect to the

voltme

ter. T

he

termination, located at the vo

ltm

eter,

ensur

es

that there are no standing wav

es

on the cabl

e.

The

indication of

th

e Model 323 Voltmeter will be

half that of

the

pa

nel meter (which indicat

es the open-circ

uit output

voltage

). Allow the 1383 to r

eac

h th ermal equi l

ibriu

m in its

case

so

that temperature-compensati

on elements in the

me

ter circuit will operate properly.

GR

874

-R33

PATCH CORD

j

0 - T 317

....--

AMPLI

TUDE

DIST R IBUTION

r

'--i..,-

ANALYZER

l~GR874

-

QBPA

ADAPTOR

~

R

777

-03

7-4

SERVICE

AND

MAINTENANC E

ADAPTOR

GR874

- R

22A

PAT

CH CORD

---........

GR 1340

PUL

SE

G

ENERA

TOR

Figu

re

7-6. Test setup

for

measuri

ng

the ampli-

tude

distributi

on

with

the Ouan-Tech Analyzer.

1383-B

7.3 RECALIBRATION.

If repa

irs are rnade

that

include the replacement

of

some

compo nents, the internal control

s noted bel

ow

may

have

to

be readjusted (

see

Figur

es

8-1

and 8-2). The

requir

ed

test e

quipment

is listed in Table

7-2.

Allow

a

'/,-hour warm-up period,

with

the instrument in the cabinet,

before making adjustments.

R525·

This potentiometer

is

adjusted

to

set

the

voltage at

the output

of

the regulated + 10 V supply.

Connect a de voltmeter from

AT531 (nega

tiv

e)

to AT5

30

(positive) and

set

R525

so

th at the

voltmeter

indicates 10

V.

The negative 10-V supply is controll

ed

by

the positive

10-V supply.

If the negative s

upply

is

appreciably

differen

t

from

-10 V , measured

from AT5

32 (negative)

to

AT531

(p

os

iti

ve), R525 can

be

reset slightl y

to

ave

rage

the

two

magnitudes about 10 V.

R 143:

This potentiometer sets th e magnitude

of

the

de

plate c

urrent in the noi

se

diod

e,

V901,

and

th ereby

co

ntrol

s the magnitude of the noi

se

output

of the 1383.

To

set

R 143,

turn

the O

UTPUT

LEVE L control

on the

front

panel fully

clockwise and

set the

potentiom

eter

so

that the

meter indi

cates

full

scale.

Then

turn

the

OUTPUT

LEVEL

contro l co

unt

ercloc kwi

se,

to

redu

ce the indicati on

of

the

meter

by

1 dB. R

ese

t R 143

to return

the meter indicati on

to

full

scale.

This

sets

the noise l

evel so

that there

is

a

r

ese

rve ampl itude

of

1 dB beyond

full

sca

le und er normal

con

dition

s.

T202: Adjustment

of the core inside this coil varies

the frequ

ency of the

osc

ill

ator

. Using a grid-dip meter,

set

the frequency

of

the oscill

ator

to 60 MHz,±1 MHz. When

r

ep

lacing the cover over the oscilla

tor

and modular board,

tight

en the f

our scr

ews

fairly

tight, but not

as

tight

as

absolutely

possible (the

"finger

stock"

material makes the

best grounding connections

for shielding when

not

pressed

abso

lut

ely flat).

R327:

Thi

s potentiometer adjusts the de bias

conditions

on the o

utput stag

e,

to

compensate for

different

cu

rrent gains in the

output

transistors,

0308

and

0309.

Using a de voltme

ter,

with

th e OUTPUT

LEVEL

cont

rol

turned

full

y countercl

ockw

ise,

adjust R 327

so

that

the

voltage from the

collec

tor

of

0309

to

ground is 2

V,

positive. A

further

refin

eme

nt

of

this adjustme

nt

is

to

observe the amp

litud

e distribution

of

the noi

se

at

full

amp

litud

e ou

tput

and adju

st

R327

for bes

t symmetry.

Thi

s

i

s,

however, a complicated procedure, and the simpler

ad

jus

tment

given

first

usua

lly suffi

ces

to produce

sat

isfac

tory

results .

R322:

Thi

s potentiometer adjusts the sensitivity of

the

voltmeter on the pane

l.

To

properly adjust this co

ntrol

,

it

is n

ecessa

ry

to

measu

re the o

utput

noise voltage. Connect

the ou

tput,

by means

of

a 50-

D.

cable,

to the

input

of

the

Ba

llantine 323

True-rms

Voltmete

r.

The

cab

le should be

terminated at the voltmeter by

an

874-W50B 50-D.

Termination using

an

874-T Tee.

An

874-0BPA

Adaptor

(GR874

to

BNC)

is

useful in making cl

osed

connecti

on to

the voltmeter. With

th

is arrangement, th e cab le is

terminated in a match

ed

load; therefo re, the

Bal

lant ine 323

Voltmeter

will read ha

lf

the voltage

indicated

by the panel

meter, which indi

ca

tes the open-circuit

output

voltag

e.

After the 1383

has

been

in its

cab

inet long enough

to reac

h

ther

ma

l equi

libriu

m,

set

the

OUTPUT

LEVEL

control so

that the Ballantine

Voltmeter rea

ds exactly 0.5

V. Then

slide

the 1383 forward,

out

of its

cabine

t, and set R322

(on the under sid

e)

so

that

the panel meter indicates

exactly 1

V.

TABLE 7

-2

Equipment required

for

recalibration.

INSTRUMENT

Voltm

ete r

Grid Dip Meter

Mul

ti

meter

REQUIREMENTS

True rm

s,

20

MHz

upper

fr

equency

limit

Must cover

60 MHz

20,000 D.!V
sens

iti

vity

RECO

MMENDED

Ballantine
Model 323

Millen No.
90651

Triplett
Model

630A

SERVICE AND MAINTENANCE 7-5

7.4 TROUBLE ANALYSIS .

A sine-wave si

gnal of

40 to 80 MH z

from

a signal

generator,

such

as

the

GR

1003, may

be

substitut

ed

for

the

noise sour

ce

of

the 1383. Apply the si

gna

l from the

gene

rator through a 1-kD. resistance

to

AT101

of

the 1383

with

V901 removed.

Set

the OUTPUT

LEVEL

control

fully

cw

and

the METER

FULL

SCALE switch to 1 V. With the

1383 functioning

properly, a 300-500

p.V

signal

will

give a

full-scale meter deflection over the entire 40-80 MHz

range.

A 500-p.V,

50-MHz signal

from

the generator should

produce a 15

mV signa

l at the

output

of

the 40-80 MHz

amp

lifi

er (AT1 02). This

input

shou

ld

also

produce a signal

of

approximately 500 mV, 10 MHz at the OUTPUT

terminals.

TABLE 7-3

DC

Test Voltages

Conditi ons:

Lin

e,

115 V,

ac,

60H

z

Meter

Fu

ll

Sca

le switch, 1 V

Output

Level, Full ccw

All

voltages to

chassis

ground. Readings t

aken

with 1806 Electronic

Volt

meter or equivalent.

TEST

POINT

DC

TEST

DC

TEST

DC

VOLTS

POINTS

VOLTS

POINTS

VOLTS

Amplif

ier, 40

-80 MHz

0101 E

c

0102

E

c

0 103 E

c

0 104 E

c

0 105 E

c

0106

E

c

0 107 E

c

0 108 E

c

0109

E

c

Local

Osci

llator, 60 MHz

0201A

E

c

02018

E

c

0202

E

c

+0.7

- 5.2

-5.8
+0

.03

-5.8

-0

.06

+07

- 5.2

- 5.8

0

-5.8

- 0.15

+0.65

- 5.2

-5.8

0

-5

.8

-

-0.15

-0.8

0

-0

.8

0

+005
+9.6

*Vari

es

with

setting

of

bias contr

ol, R327.

7-6 SERVICE AND MAINTENANCE

0203

E

c

0204

E

c

Video

Amp

lifier

030

1 E

c

0302

E

c

0303

E

c

0304

E

c

0305

E

c

0306

E

c

0307

E

c

0308

E

c

0309

E

c

0310

E

c

-0

.7

+3.8

-0.7

+9.6

+0.75

-5.2

- 5.8

-

0.3

- 5.8
+0.5

+0.75

- 5.2

-6.0

- 0.5

- 6.0

- 0.2

+0.7

-5.0*

-5.6*

-0.7

*

-5.6*
+2.0*

-0.8
+3.0

Regulator, ±10 V

050

1 E (AT527)

c

0502

E

c

0503

E (A T523)

C (AT530)

050

4 E

c

0505

E (AT529)

c

0506

E (A T526)

C (AT532)

Filament Regulator

0

11

0 E (AT109)

c

01

11

E

c

0112 E

c

0901 E (AT10

6)

C (AT11

2)

V90 1

#3

(AT112)

#4

(AT108)

+15.0
+13.5

+5.0

+ 14.4

+14.5

+10

.0

0

- 14.0

- 15.0

- 13.5

- 14.0

-10.0

-60.0

-62.0

-66.0

-6

4.0

-64

.0

-60.0

-66

.0

-6

4.0

-6

4.0

- 60.0

7.5 KNOB REMOVA

L.

To

remo

ve

the knob on a front-panel control, either

to rep

lace one that h

as

been

damaged or

to

replace the

associated

co

ntrol,

pro

ceed

as

follow

s:

a.

Grasp the knob

firmly

with

the finger

s,

close

into

the panel (or the indicator dial,

if

appli

cable)

and pull the

knob straight, away

from

th e pane

l.

CAUT

ION

Do n

ot

pull on the dial to remo

ve a dial/knob

assembly. A lways remove the knob first.

b.

Observe the position

of

the

setsc

rew in the

bu

shing, w ith respect to any

pan

el markings (or at the

full

CCW

pos

iti

on

of a co

ntinuous

cont

rol).

c.

Release

the

setsc

rew with

an

All

en

wrench and pull

the bushing

off

the shaft.

d. Remove and retain th e

black

nylon

thrust

washe

r,

behind the

dial/knob

assemb

ly,

as

appropriate.

NOTE

To

sepa

rate the bushing

from

the knob,

if

for

any r

eason

they shou ld be combined

off

the

instrument, dri

ve

a machine-screw tap a turn

or

two

int

o the bushing to provide sufficient grip

for

easy

separation.

7.6 KNOB INSTALLAT ION.

To install a

"Snap-on"

knob

assemb

ly on the control

shaft :

a.

Place the black

nylon

thrust

wash

er over the

contro l sh

aft,

if

appropriate.

b. Mou

nt

the bushing on the sh

aft,

using

sma

ll slotted

pi

ece

of

wrapping paper

as a sh

im

for

adequate clear

ance.

c.

Orient the

setsc

rew on the bushing

with

respe

ct to

the panel-marking index and

lock the setscrew wi

th

an

Allen wrench.

NOTE

Make sure that the end

of

the shaft d

oes

not

protrude through the bushi

ng

or the knob

won't

sea

t properly.

d. Place

the knob on th e bushing wi

th

the re

tenti

on

sp

rin g opposite the

setsc

rew.

e.

Push

the knob in

until

it bottoms

and pull

it

slightly

to

check that the retention spring

is

seate

d in the

bushing.

NOTE

If

the retention sprin g in the knob comes loose,

reinstall

it

in the

interior

notch

with

the

sma

ll

sl

it

in the outer wall.

7.7 PILOT-LAMP REMOVAL.

To replace

the pi l

ot

lamp (

GE

No. 328,

GR

P/N

5600-0300),

remove th e instrument

from

its

cab

inet . Insert

a

sma

ll screw

dri

ver under the retaining str

ap

at the rear

of

the lamp holder. R

aise

the end of th e strap slightl

y and

it

will slide free, perm

ittin

g the lamp

to

be

withdrawn.

SERVI

CE

AND

MAINTENAN

CE

7-7

Code

00192
00194
00434
00656
01009
01121
01295
02114
02606
02660
02768
03508
03636
03888
03911
04009

04713
05170
05624
05820
07126
07127
07261
07263
07387
07595
07828
07829
07910

0798

3
07999
08730
09213
09408
09823
09922
11236
11599
12040
12498
12672
12697
12954

13327
14433
14655
14674
14936
15238
15605
16037
17771
19396
19644
19701
21335
22753
23342
24446
24454
24455
24655
26806
28520
28959
30874
32001
33173

35929
37942
38443
40931
42190
42498
43991

9/68

Parts

Lists

and

Diagrams -Section

8

FEDE

'lAI.

1\nANUFACTURER'S CODE

From Federal Supply

Corl

~

for

Manufacturers Cataloging Handbooks H4-1

(Name

to

Code)

and

H4-2 (Code

to

Name)

as

supplemented through August, 1968.

Manufacturer

Jones

Mfg.

Co,

Chicago,

Illinois

Walsco

Electronics

Corp,

L.A.,

Calif.

Schweber

Electronics, Westburg,

L.l.,

N.Y

.

Aerovox

Corp,

New

Bedford,

Mass.

Alden

Products

Co,

Brockton, Mass.

Allen-Bradley, Co,

Milwaukee,

Wise.

Tex.as

Instruments,

Inc,

Dallas,

Texas

Ferroxcube

Corp, Saugerties,

N.Y. 124

77

Fenwal

Lab

Inc,

Morton

Grove,

Ill.

Am

phenol

Electron

Corp,

Broadvi

ew,

Ill.

Fastex, Des

Plaines,

Ill.

60016

G.E. Semlcon

Prod, Syracuse,

N.Y. 13201

Grayburne,

Yonkers,

N.Y. 10701

Pyrofilm

Resistor Co,

Cedar

Knolls,

N.J.

Clalrex

Corp,

New

York, N.Y.

10001

Arrow-Hart & Hegeman,

Hartford,

Conn.

06106

Motorola,

Phoenix,

Ariz.

85008

Engr

'd

Electronics,

San

ta

Ana,

Calif.

92702

Barber-Colman

Co,

Rockford

, Ill.

61101

Wakefield

Eng,

Inc,

Wakefield, Mass. 01880

Dlg

itron

Co,

Pasadena, Calif.

Eagle

Signal

(E.W.

Bliss

Co),

Baraboo

, Wise.

Avnet

Corp,

Culver

City,

Calif. 90230

Fairchild

Camera,

Mountain

View,

Calif.

Birtcher

Corp,

No. Los

Angeles,

Calif.

Amer

Semicond,

Arlington

Hts,

Ill.

60004

Bodi

ne

Corp,

Bridgeport,

Conn.

06605

Bodine Electric Co,

Chicago,

Ill.

60618

Cant

Device

Corp,

Hawthorne,

Calif.

State

Labs

Inc,

N.Y.,

N.Y.

10003

Borg

lnst.,

Delavan,

Wise.

53115

Vemaline

Prod Co,

Franklin

Lakes, N.J.

G.

E.

Semiconductor,

Buffalo,

N.Y.

Star-Tronics

Inc,

Georgetown,

Mass.

01830

Burgess

Battery

Co,

Freeport,

Ill.

Burndy Corp, Norwalk,

Conn.

06852

C.T.

S.

of

Berne

, In

c,

Berne, Ind.

46711

Chandler

Evans

Corp,

W.

Hartford, Conn.

Nati

ona

l S

emicon

duc

tor,

Danbury,

Conn.

Crystalonics,

Cambridge,

Mass.

02140

RCA, Woodbridge

, N.

J.

Clarostat

Mfg Co,

Inc,

Dover,

N.H.

03820

Dickson

Electronics,

Scottsdale,

Ariz.

Solltron

Devices,

Tappan,

N.Y.

10983

ITT

Semlcondictors, W.Palm

Beach, Fla

.

Corneii

-Du

blller

Electric

Co,

Newark,

N.J.

Corning

Glass

Works, Corning,

N.Y.

Gene

ral

Instrument

Corp,

Hicksville,

N.Y.

ITT, Semi

conductor

Div,

Lawrence, Mass.

Cutlet-Hammer

Inc,

Milwaukee,

Wis

e.

53233

Spruce

Pine

Mica Co,

Spruce

Pine, N.C.

Singer

Co,

Diehl

Div,

Somerville,

N.J.

Illinois

Tool

Works,

Pakton

Div,

Chicago

, Ill.

LAC

Electronics, Horseheads, N.Y.

Electra

Mfg Co,

Independence,

Kansas

67301

Fafnir

Bearing

Co,

New

Briton, Conn.

U I D

Electronics

Corp,

Hollywood,

Fla

.

Avnet

Electronics

Corp,

Franklin

Park

, Ill.

G.E.,

Schenectady,

N.Y.

12305

G.E.,

Electronics

Camp,

Syracuse, N.Y.

G.

E.

(Lamp

Dlv),

Nela

Park, Cleveland,

Ohio

General

Radio Co, W.

Concord,

Mass. 01781

American

Zettlet

Inc,

Costa

Meta,

Calif.

Hayman

Mfg Co,

Kenilworth,

N.J.

Hoffman

Electronics

Corp,

El

Monte, Calif

.

I.B.M,

Armonk,

New

York

Jensen

Mfg.

Co,

Chicago,

Ill.

60638

G. E.

Camp,

Owensboro,

Ky.

42301

Constanta

Co,

Mont.

19,

Que.

P. R.

Mallory & Co

Inc,

Indianapolis,

Ind

.

Marlin-Rockwell

Corp,

Jamestown

, N.

Y.

Honeywell

Inc, Minneapolis, Minn. 55408

Muter Co,

Chicago

, Ill.

60638

National

Co,

Inc, Melr

ose,

Mass. 02176

Norma-Hoffman, Sta

nford, Conn.

06904

Code

49671
49956
53

021
54294
54715
56289
59

730
59875
6

0399
61637
61864
63060
63743
65

0P.J

F'J092

70485
7:'

563

70903

-,

~

126

71

294
71400
71468
7

1590
71666
71707

71744
71785
71823
72136
72259
72619
72699
72765
72825
72962
72982
73138
73445
73559
73690
73899
74193
74861
74970
75042
75382
75491
75608
75915
76005
76149
76487
76545
76684
76854
77147
77166
77263
77339
77642
77630
77638
78189
78277
78488
78553
79089
79725
79963
80030
80048
80131
80183
80211
80258
80294

Manufacturer

RCA,

New

York,

N.Y.

1002

0

Raytheon

Mfg

CC",

Waltham, Mas

s.

021

54

c:~,ga

mo

Electric

Co, Sprlngf

iald,

Ill

62705

Sha

llcross

Mfg Co,

Selma,

N.C.

Shure

Brothers,

Inc,

Evanston

IlL

Sp

rague

Electric Co, N. AdaTls, Mass.

Thomas

and

Betts

Co,

E1 1

abeth,

N.J.

07207

TRW

Inc,

(Accessorl

e!o

Div),

Cleveland,

Ohio

Torringt

on

Mfg C ...

, 1

orrington,

Conn.

Union

Carbide C.J

rp,

New

York,

N.Y.

10017

United

-Ca

rr

Fastener

Corp, Boston,

Mass.

Victoreen

Ins

tru

ment

Co,

I n

r.:,

Cle

veland,

0.

Ward Leo

nard

El e

ctric

Co,

Mt.

Ve rnon, N. Y.

Westl,..g

hous

e (

Lamp

Olv). Bloo

mfield, N.J.

Wes

ton

Instruments, Newark,

N.J.

At

lan

tic-Indi

a Ru

bber, Chicago

, Ill.

60607

Am

perlte

Co,

Unio,.. C i

ty,

N.J.

07087

Belden

Mfg

Co, Chicago,

Ill. 60644

Bro

nson

Homer

D,

Co,

Beacon

Fall

s,

Conn.

Canfield,

H.O.

Co,

Clifton

Forge, Va.

24422

Bussman

(McGraw

Edison),

St.

Louts, Mo

.

ITT

Cannon

Elec,

L.A.,

Calif.

90031

Centra

lab,

Inc, Milwaukee,

Wise , 532

12

Continental

Carbon

Co,

Inc,

New York, N.Y.

Coto

Coli

Co

Inc,

Providence,

R.I.

Chicago

Miniature

Lamp

Works,

Chicago,

Ill.

Cinch

Mfg

Co,

Chic

ago

, Ill.

60624

Darnell

Corp, Ltd,

Downey,

Calif.

90241

Electro

Motive

Mfg

Co,

Wilmington, Conn.

Nytronics

Inc,

Berkeley

Heights, N.J.

07922

Dialight

Co,

Bro

oklyn,

N.Y.

11237

General I nstr

Corp,

Newark,

N.J. 07104

Drake

Mfg

Co,

Chicago,

Ill.

60656

Hugh

H.

Eby

Inc, Philadelphia,

Penn. 19144

Elastic

Stop

Nut

Corp,

Union,

N.J.

07083

Erie Technologic

al Pro

ducts

Inc, Erie, Penn

.

Beckman

Inc,

Fullerton,

Calif.

9263

4

Amperex

Electr

onics

Co,

Hicksville

, N

.Y.

Carling

Electric Co, W.

Hartford

, Co

nn.

Elco

Resistor

Co,

New York

, N. Y.

JFD

Electronics Corp

, Br o

oklyn, N.Y.

Hein

emann

Electric

Co, Trent

on,

N.J.

lndunrlal

Condenser

Corp,

Chicago,

1

11.

E.

F.

Johnson

Co,

Waseca,

Minn.

56093

lAC

Inc,

Philadelphia, Penn.

19108

Kulka

Electric

Corp,

Mt.

Vern

on,

N.Y

.

Lafayette I ndustrlal

Electronics,

Jamlca,

N.Y.

Linden

and

Co,

Providence, R.I.

Littelfu

se,

Inc,

Des

Pla

ines,

Ill.

60016

Lord

Mfg Co,

Erie, Penn. 16512

Mallory

Electric

Cor

p,

Detroit,

Mich.

482

04

James

Millen

Mfg Co, Malrl

en,

Mass.

02148

Mueller

Electric Co. Cleveland

, O

hio

44114

National

Tube

Co, Pittsburg,

Penn.

Oak

Mfg Co,

Crystal Lake, Il

l.

Patton

MacGuyer

Co, Providence, R.I.

Pass-Seym

our,

Svracuse,

N.Y.

Pierce

Roberts

Rubber

Co,

Trenton,

N.J.

Positive Lockwasher Co,

Newark. N.J

.

Ray-0-Vac

Co,

Madison

, Wise.

TRW, Electr

onic

Comp, Camden, N.J.

08103

General

instrumen

ts

Corp,

Brooklyn,

N.Y

.

Shakeproof

(Ill.

Tool

Works),

Elgin,

Ill.

60120

Sigma

Instrume

nts

Inc,

S.

Braintre

e,

Mass

.

Stackpole

Carbon

Co, St.

Marys,

Penn

.

Tinnerman

Products, Inc,

Cleveland, Ohio

RCA,

Rec

Tube & Semlcond,

Harrison, N.J.

Wiremold

Co, Hartfor

d,

Conn.

061

10

Zierl

ck

Mfg

Co,

New Roc

helle

, N

.Y.

Prestole

Fastener

, T o

ledo,

Ohio

Vickers

Inc,

St. Louts,

Mo.

Electronic I ndustrles

Assoc,

Washington, D.C

.

Sprague

Products Co, No.

Adams,

Mass.

Motorola

Inc,

Franklin

Park

, Ill.

60131

Standard

Oil Co,

Lafayette, Ind.

Bourns

Inc, Riverside, Calif. 92506

Code

80431
80583
807

40
81030
810

73
81143
813

49
81350
81751

81831

818

40

81860
82219
82273
82389
82647
82807
83033
83058
83186
83361
83587
837

40

83781
84411
84835
8

4971
86577
86684
86687
86800
88140
88219
88419

88627
89482
89665
9020

1
90750
90952
91032
91146
91293
91506
91598
91637
9

1662
91719
91929
92519
92678
93332
939

16
94144
9415

4
95076
95121
95146
9523

8
95275
95354
95412
95794
96095
96214
96256

96341
9679

1
96906
98291
98474
98821
99180
99313
99378
99800

Manufacturer

Air

Filter

Corp,

Milwaukee,

Wise.

53218

Hammarlund Co,

Inc,

New

York,

N.Y

.

Beckman

Instruments,

inc,

Fullerton, Calif

.

International

lnsturment,

Orange,

Conn.

Grayhill

Inc,

LaGrange,

Ill.

60525

lso

lantite

Mfg

Corp,

Sti

rling,

N.J.

07980

Military

Specificatio

ns

Joint

Army-Navy Specifications

Co

lumbus

Electronics

Corp,

Yonkers,

N.Y.

Filtron Co,

Flushing, L.l.,

N.Y.

11354

Ledex

Inc,

Dayton,

Ohio

45402

Barry-Wright

Corp,

Watertown.

Mass.

Sylvania

Elec

Prod,

Emporium,

Penn.

I

ndlana

Patte

rn & Model

Works,

LaPort, Ind

.

Switchcr

aft

Inc,

Chicago,

Ill.

60630

Metals & Controls

Inc, Attleboro,

Mass.

Milwaukee

Resistor Co,

Milwaukee,

Wise

.

Meissner

Mfg,

(Mag

uire

lnd) Mt.

Carmel

, Ill.

Carr

Fastener

Co,

Cambridge,

Mass.

Victory

Engineering, Springfield,

N.J. 07081

Bearing

Specialty

Co,

San

Francisco, Calif.

So

lar

Electric

Corp,

Warren,

Penn.

Union

Carbide

Corp,

New

York,

N.Y.

10017

Nation

al

Electronics

Inc,

Geneva,

Ill.

TAW

Capacitor

Div,

Ogallala,

Nebr

.

Lehigh

Metal

Prods,

Cambridge,

Mass.

02140

TA

Mfg

Corp,

Los

Angeles,

Calif.

Precision

Metal

Prods,

Stoneham,

Mass. 02180

RCA

(Elect.

Camp

& Dev),

Harrison, N.J.

A EC

Corp,

New

Rochelle, N.Y.

10801

Cant

Electronics

Corp,

Brooklyn,

N.Y.

11222

Cu

tler-Hammer

Inc,

Lincoln

, Ill.

Gould

Nat.

Batteries

Inc,

Trenton,

N.J.

Corneii-Dubilier,

Fuquay~Varlna

,

N.C.

K & G

Mfg

Co,

New

York,

N. Y.

Holtzer-Cabot

Corp,

Boston, Mass

.

United

Tiansformer

Co,

Chicago

, Ill.

Mallory

Capacit

or

Co,

Indianapolis,

Ind.

W

esting

house

Electric

Corp,

Boston, Mass.

Hardware

Products

Co,

Reading,

Penn.

19602

Continen

tal Wire

Corp,

York,

Penn. 17405

ITT {Cannon

Electric

Inc),

Salem,

Mass

.

Johanson

Mfg

Co, Boon

ton, N.J.

07005

Augat

Inc, Attleboro,

Mass. 02703

Chandler

Co,

Wethersfield, Conn.

06109

Dale

Electronics Inc,

Columbus,

Nebr.

E\co Corp

, Will

ow

Grove,

Penn

.

General

Inst

ruments, Inc, Dallas,

Texas

Honeywell Inc,

Freeport,

Ill.

Electra

lnsul

Corp,

Woodside,

L.l.

, N. Y.

E.G.&G

.,

Boston,

Mass

.

Sylv

ania

Elect

Prods,

Inc,

Woburn,

Mass.

Cramer Produ

cts

Co,

New

York,

N. Y.

10013

Raytheon

Co,

Compon

ents

Olv, Quincy,

Mass.

Tung

Sol

Electr

ic Inc,

Newark, N.J

.

Garde

Mfg Co,

Cumberland, R.I.

Qua

lity Components

Inc, St.

Mary's,

Penn

.

A

leo Ele

ctro

nics

Mfg

Co,

Lawrence,

Mass.

Continent

al

Connector Corp, Woodside, N.Y.

V

itramon,

Inc, Bridgeport,

Conn

.

Methode

Mfg

Co,

Chicago,

Ill.

Gene

ral

Electric Co,

Schenectady,

N.Y.

Anaconda

Amer

Brass

Co,

Torrington,

Conn.

HI-Q

Oiv, of

Aerovox

Corp,

Orlean,

N.Y.

Texas

Instruments

Inc, Dallas, Texas

75209

Thordarson-Melssner, Mt.

Carmel,

Ill.

Microwave

Associates

Inc,

Burlington,

Mass.

Amphen

ol

Corp,

Jonesville,

Wise,

53545

Military

Standards

S

ealectro

Corp,

Mamaroneck, N.Y. 10544

Com

par

Inc,

Burlingame,

Calif.

North

Hills

Electronics

Inc,

Glen

Cove,

N.Y.

Transltron

Electronics

Corp,

Melrose,

Mass.

Varian,

Palo

Alto,

Calif. 94303

Atlee

Corp,

Win

che

ster,

Mass.

01890

Delevan

Electronics

Corp

, E.

Aurora,

N. Y.

8-1

MECHANICAL PARTS LIST

GR

Name

Description

Part Number

FMC

Mfg.

Part Number

F

edera/

Stock

No.

Cabinet

Complete,

Converti

ble-Bench

4181-2646

24655

4181-2646

Meter

Cover

ME3-701, light

gray

5720-3713

24655

5720-3713

Knob

Asm

.

OUTPUT

LEVEL

Knob,

including

retainer

5220-5402

5520-532

1 24655

5520- 532 1

Di

al

Asm.

METER

FULL

SCALE

dial,

including retainer

4123-3241

1383-1110 24655

1

383-1110

Knob

Asm.

METER

FULL

SCALE Knob ,

including

retainer

5220-5402

5500-5321 24655

5500-5321

Cover

Plate OUTPUT

Cover

Plat

e,

Complete

0480-24

70

24655

0480-2470

D

ress

Nut

For

Pow

er

Toggle Switch,

5310-344-3634

15/32-

32,

Dress

5800-0800

24655

5800-0800

Foot

R

ear,

black

Neoprene

Foot

5260-2060

24655

5260-2060

Foot

Ri

ght,

front

black Pheno li c

Foot

for

use

with

Bail

5250-2121 24655

5250-2121

Left,

front

black

Phenolic

Foot,

for

use

with

Bail

5250-2120

24655

5250-2120

Bail

Tilt-bar

support

5250-2125

24655

5250-2125

Fuseholder

Extraction -post
Fuse-mounting Dev

ice

5650-0100

71400

HKP-H

5920-284-7144

Output

Connector

Assemb

ly

0874-4624

24655

0874

-4

624

Panel

Jack

0874-6690

24655

0874-6690

8-2

ETCHED

-CIRCUIT

BOARD

P/ N 1383-2711

0 901

V901

COVER

PLATE

P/N

0480 -2470

5!501

AT530

AT53

2

PL501

J 9

01

ArlO!

C506

csoa

$901

(HIDDEN)

C507

R504

C505

R917

ATI02

C504

C503

F502

R923

T202

FSOI

S502

ETCHED-

Cl RCUIT

BOAR D

P/N 1383-27

50

S5

01

T201

PLSOI

Figure

8-1.

Top

interior

view

of

the

Generator.

R525

R923

R917

R

322

R924

/.>"/

0503

csos

C506

5502

F502

C504

C507

Figure 8-2,

Bottom

interior

view

of

the

Generator.

C508

COVER PLATE

P/N

0480-2470

0308

0309

~,Y:H'T-

-

ETCHED-

CIRCUIT

BOARD

P/

N 1

383

-2731

J90

1

8-3

PARTS

LIST

GR

Fed.

Ref.

No.

/)(

'>Crip/)

1)1

,

Part No.

Mfg. Code

Mfg.

Part

No.

Fed.

Stock

No.

CAPACITORS

C101

C

eramic

, ll.01

J-lF

+80-20

% 500 V

4406-

3109

72982

811,

0.

01

J-lF

+80 -20% 5910 - 754- 7049

C102

Ce

ramic,

0.001

J-lF

+80 -20% 500 V

4404-2109

72982

83

1,

0.001

J-lF

+80-20%

5910-983

-9994

C103

Ceramic,

0.1

J-lF

±20% 25 V

4400-2050

80183

5C13, 0.1

J-lF

5910- 974 - 5695

C104

Ceramic

, 33 pF ±5% 500 V

4404-0335

72982

831,33

pF ±5%

C105

Ceramic,

0.001

J-lF

+80

-20

% 500 V 4404-210 9

72982

83

1,

0.001

J-lF

+80-20%

5910-983-9994

C106

Ceramic,

0.001

J-lF

+80-20

% 500 V

4404-2109

72982

831,

0.001

J-lF

+80-20

% 5910 - 983 -9994

C107

Ceramic,

0.001

J-lF

+80-

20%

500 V

4404-2109

72982

831,

0.001

J-lF

+80-20% 5910-983

-9994

C108

Ceramic,

33

pF ±5% 500 V

4404-0335

72982

831, 33

pF ±5%

C109

Ceramic,

0.001

J-lF

+80-20

% 500 V

4404-2109

72982

831,

0.001

J-lF

+80 -20 %

5910-983-9994

C110

C

eramic,

51

pF ±5% 500 V

4404-0515

72982

83

1,

51

pF ±5%

C111

Ceram

ic , 56

pF ±5% 500 V

4404-0565

72982

83

1,

56

pF ±5%

C112

Ceramic,

0.001

J-lF

+80-20

% 500 V

4404-2109

72982

831,

.001

J-lF

+80

-20

% 5910-

983-9994

C113

Ceramic,

33

pF

±5% 500 V

4404-0335

72982

831 , 33

pF ±5%

C114

Ceramic,

0.001

J-lF

+80-20% 500 V

4404-2109

72982

831,

0.001

J-lF +80-20%

5910 -983 - 9994

C11 6

Ceramic,

0.1

J-lF

±20% 25 V

4400-2050

80183

SC1

3,

0.1

J-lF

5910-974-5695

C11 7

Ceramic,

0.001

J-lF +80-20

% 500 V

4404-2109

72982

831,

0.001

J-lF

+80- 20% 5910- 983 - 9994

C11 8

Ce

ramic,

0.001

J-lF

+80- 20% 500 V

4404-2109

72982

831,

0.001

J-lF

+80 -20% 5910- 983 -9994

C11 9

Ceramic,

0.1

J-lF

+80-20

% 10 V

4431-4109

80183

20C202, 0.1

J-lF

+80 -

20%

C120

Ceramic,

0.001

J-lF

+80 -20 % 500 V

4404-2109

72982

831,

0.001

J-lF

+80-

20%

5910- 983 -9994

C121

Ceramic

, 0.001

J-lF

+80 - 20% 500 V

4404-2109

72982

83

1,

0.001

J-lF

+80 -20%

5910- 983 -9994

C122

Ceramic,

0.001

J-lF

+80-20

% 500 V 4404-2109

72982

83

1,

0.001

J-lF

+80 -20%

5910- 983 -9994

C123

Ceramic,

0.1

J-lF

±20% 25 V

4400-2050

80183

5C13, 0.1

J-lF

5910 - 974-5695

C124

Ceramic

, 0.01

J-lF

+80-20

% 500 V

4406-3109

72982

811,

0.01

J-lF

+80- 20% 5910 -754 - 7049

C125

Ceramic,

0.01

J-lF

+80-20% 500 V

4406 -3109

72982

811,

0.01

J-lF

+80-20% 5910 - 754- 7049

C126

Ceramic,

0.01

J-lF

+80-20% 500 V

4406-

3109

72982

811,

0.01

J-lF

+80- 20%

5910 - 754 - 7049

DIODES

CR101

Type

IN750A

6083-1028

07910

IN750A

5960- 754- 5897

CR10 2

Type

IN748A

6083-1002

07910

IN748A

5960-800-3973

CR103

Type

IN4009

6082 -1012

24446

IN4009

596

1-

892-8700

CR104 Ty

pe

IN4009

6082-1012

24446

IN4009

596

1-

892 -8700

CR105

Type

IN400 9

6082-10

12

24446

IN4009

5961-892

-8700

CR201

Type

MS7330

6082-1027

13327

MS7330

CR202

Ty

pe

MS7330

6082-1027

13327 MS7330

RESISTORS

R1

01

Composition,

4 7 Q ±5% 1/ 4 W 6099

-04

75

75042

BT

S, 47 Q ±5%

R102

Composition,

560 Q ±5%

1/4

W

6099-1565

75042

BTS, 560 Q

±5

%

R1

03

Composition,

90.9 Q ±1% 1

/8

W

6250-9909

75042 CEA, 90.9 Q ±1%

R1

04

Composition,

10 Q ±1% 1

/8

W

62

50-0010

75042 CEA, 10 Q ±1%

R105

Composition,

510 Q ±5%

1/4

W

6099-1515

75042 BTS, 510 Q

±5

% 5905 -801-82

72

R106

Composition,

220 Q ±5% 1/ 4 W

6099-1225

75042 BTS, 220 Q

±5

%

5905-683

-2240

R107

Composition,

910 Q ±5%

1/4

W

6099-

1915

75042

BTS, 910 Q

±5

%

R110

Composition,

10 Q ±5% 1/ 4 W

6099-0105

75042 BTS, 10 Q

±5

% 5905-

809-8596

R111

Composi

tion, 10 Q ±5% 1/ 4 W

6099-0105

750

42

BTS, 10 Q ±5% 5905- 809 - 8596

Rll2

Composition

, 560 n

±5

% 1/ 4 W

6099-1565

75042

BTS, 560 Q

±5

%

Rll

3

Composition,

90.9 Q ±1% 1

/8

W

6250-9909

75042

CEA, 90.9 Q ±1%

R114

Composition,

10 Q ±1% 1

/8

W

6250-0010

75042

CEA, 10 Q ±1%

R115

Composition

, 510 Q ±5%

1/4

W

6099-1515

75042 BTS, 510 Q

±5

% 5905- 801-8272

R11 6

Composition

, 220 Q ±5%

1/4

W

6099-1 225

75042

BTS

, 220 Q ±5% 5905- 683 -2240

R11 7

Composition,

910 Q ±5% 1/ 4 W

6099-1915

75042 BTS, 910 Q ±5%

R120

Compos

iti

on, 10 Q ±5% 1

/4

W

6099- 0105

75042

BTS

, 10 0 ±5% 5905 -809- 859 6

R121

Composition,

10 Q ±5% 1/ 4 W

6099-0105

75042 BTS, 10 Q

±5%

5905 - 809 - 8596

R122

Composition,

47 Q ±5% 1

/4

W

6099-0475

75042 BTS,

47 Q ±5%

R1

23

Composition,

560 Q ±5% 1/ 4 W

6099

-15

65

75042

BTS

, 560 Q ±5%

R1

24

Composition,

90.9 n

±1

% 1

/8

W

6250-9909

75042 CEA, 90.9 Q ±1%

R125

Composition,

10 Q ±1%

1/8

W

6250-0010

75042

CEA, 10 Q ±1%

R1

26

Composition,

510 Q ±5% 1/ 4 W

6099-1515

75042

BTS, 510 Q

±5

% 5905 -801-8272

R1

27

Composition,

220 Q ±5% 1

/4

W

6099-1 225

75042

BTS

, 220 n

±5

%

5905-683

-2240

R1

28

Composition,

910 Q

±5%

1/ 4 W

6099-1915

75042

BTS

, 910 Q ±5%

R1

31

Composition,

470 Q ±5% 1/ 4 W

6099-1475

75042

BTS,

4

70 Q ±5

% 5905- 683 -2242

R1

32

Composit

ion, 4

70 Q ±5% 1/4

W

6099-1475

75042 BTS,

4

70 Q ±5

%

5905- 683

-2242

R1

33

Composition,

470 Q ±5%

1/4

W

6099-1 475

75042

BTS,

4

70 Q ±5

% 5905- 683 -2242

R1

34

Composition, 5.1

kQ ±5%

1/4

W

6099-2515

75042

BTS,

5.1

kQ ±5%

R1

35

Composition,

680 Q ±5% 1

/2

W

6

100-1

685

01121

RC20GF681J

5905-

195 -6791

R1

36

Composition,

100 Q ±5%

1/2

W

6100-1105

01121

RC20GF101J

5905 -1

90

-8889

R1

37

Composition

, 100 Q ±5% 1

/2

W 6100-1105

01121

RC20GF10

1J

5905 -1

90-8889

R1

38

Composition,

510 Q ±5% 1/ 2 W

6100- 1515

01121

RC20GF511J

5905- 2 79-3511

R1

39

Composition,

680 Q ±5%

1/2

W

6100-1685

01121

RC20GF68 1J

5905-195 -

679!

R140

Composition,

62 Q ±5

% 1/ 2 W

6100 -0625

01121

RC20GF 620J

5905-279-1760

R141

Composition,

150 Q ±5%

1/2

W

6100-1155

01121

RC20GF151J

5905-299-1541

R143 Pot. ,

Wir

e Wound 300 Q

±10%

6056-0135

11236 115 , 300 Q

±10%

R144

Composition,

10 Q ±5% 1/ 4 W

6099-0105

75042

BTS

, 10 Q ±5% 5905- 809-8596

R145

Composition,

10 Q ±5%

1/4

W

6099-0105

75042 BTS, 10 Q ±5%

5905- 809-8596

8-4

OE

OE

PARTS

LIST

(Cont)

Ref.

No

.

D

escription

Part

No. FAIC 1

\f

{g.

Part

No.

TRANSISTORS

Q101

Ty

pe

2N3250

8210 -1089 802

11

2N

3250

Q102

Ty

pe

2N285 7

82

10-1088

24454

2N2810-A

Q103

Type

2N3646

82 10-1119

07263 2N3646

Q104 Ty

pe

2N3640

8210-

1129

93916

2N3640

Q105

Type

2N2857

8210-108 8 24454

2N28

10-A

Q106

Type

2N3646

8210-

1119 07263 2N3646

Q1

07

Type

2N3640

82

10-1129 93916 2N3640

Q108

Ty

pe

2N2857

8210 -1088 24454

2N2810 - A

Q109

Type

2N3646

8210 -111 9

07263 2N3646

QllO

Type 2N3905

8210

-ll1

4 047 13 2N3905

Q1ll

Type

2N3414

82

10-1047

24446 2N3416

Qll2

Typ

e 2N3414

8

210-1047

24446 2N3416

Q901

Type

2N3055

8210

-109

7

12672

40251

MISCELLANEOUS

Ll

01

Ll

02

T101

V901

Chok

e,

Molded,

0.15

J,J

H ±10%

430

0-0101

99800

1536 ,

0.15

J,JH

±10%

15

36,

0.15

J,JH

±10%

Choke

, Mold

ed,

0.15

J,JH

±10%

43

00-0101

99800

Co

il

5000-2711

24655

5000 -2 7

11

Type

5722

8380 -5722

82219 5722

103

1383-0710/5

Rll7

C~l

~~,~~_.

........

~~

AO

'*

T Rli O

RI140 150

A 017 0

etoe

.A

0

- :

-Ri

ll

Figure 8-3. Etched-circuit-board assembly

for

the

4(}.8G-MHz amplifier. The complete board

is

P/N

1383-2711.

E

0

NOTE: The number appearing

on

the foil

side

is

not the part number.

The dot

on

the foil at the transistor socket indicates the collector

lead.

Fed.

Stock

No.

5961 -945 -4108
5961 -

964-5753

5961-964-5753

5961 -989

-2749

5961 -989 -2749

NO ISE

DIODE

1- - - - - - - - - - - -

IOI

T

AltO!

I

V901,-,~

I

1

g"J

4

RI02

560

Rl05
510

CI03

T0-1

Rl31

47

Rl

06

220

1

+

0V

Rl23
56

Rl26

510

AT530

Cll

J

0

DO

Rl
2:

B

OARD

1383-2711

40-80

RIIO

10

Rl

07

910

0

Rl12

560

Rll5
510

MHz AMPLIFIER

CI07

J .

Rl44

10

OOI

Rl32

47

Rl l7

91

0

0

CR

IOI

4.7V

Rl34

5JK

Rl2 0

10

Rl45

10

BOTTOM

1. POSITION

SHO

WN

2.

CO

NTA
EXPLAINED
SUPPLIED

3.

REFER

UCTION
APPEARING

4. RESIS

,

--

I

B

EO c

010

1

VIEW

OF TRANSISTO

NOTE UNLESS

OF

ROTARY SWITCHE

COUNTERCLOCKWISE.

CT

NUMBERING

ON SEPARATE SHEET

IN

INSTRUCTION

TO

SERVICE

NOTES IN

BOOK

FOR

VOLTAGES

ON

DIAGRAM.

TORS 1/4 W

ATT

....J

A

TI06

I

HIE

S

OF SWITCHE

BOOK

INSTR

.

Rl37

1

00

I/2W

CRI05

FILA

E

LOO B

c

0102,105,108

RS

SPECIFIED

S.

RESISTANCE

S

K - 1000

6. CAPACITANCE VALUES

S

OVER
THAN

.

7. 0 KNOB CONTROL

-

8. @

9. AT·

10. TP. TEST

Rl40
62

I/

2W

MENT REGULATOR

0901

IN

OHMS

OHMS

M 1

PICOFARADS.

IN

MICROFARADS.

TERMINAL

POINT

c

MEGOHM

ONE AND

LESS

0

IN

ONE

SCREWDRIVER CONTROL
ANCHOR

J OI

B

E

Oc

0103,104,106
0107,109

Cll6

--

---

c

,0

0 0

EG B

.

___

/

0111

,112

Rill

C

10

I

ATIIO

AT

II/

__

___

_j

OliO

ll7

TOOl

_j_CI25
JO,OI

--

WH-GN-BK

WHGN-

WH-GH- BR

--

BU

Rl21

10

AT508

AT514

AT509

A

T/04

-IOV

AT532

H.Rc

Fig

MHz

ure

8-4. Sche

amplifier.

Cl02

.

001

RI02
560

J

Cl03

0.1
Rl31

470

Rl07

910

BOARD

RIIO

10

ClOG

.001

1383-2711

40·80

Rll2

560

MHz AMPLIFIER

CI07

1'.001

Rll3

Rl32

470

Rll7

910

Rl34

5,1K

Rl20

10

Rl23
560

1

+

0V

AT5

1'.001

30

Cll2

Rl33

470

RI2B

.910

-,

--

I

I

I

TO

AT201

Rl05
510

~~--,-------~------~------

FILAMENT REGULATOR

----

o e

,108

ECIFIED

,

RESISTANCE

K - 1000

.

CAPACITANCE
OVER
THAN

. Q

KNOB

8.

§)

SCREWDRIVER

. AT.

ANCHOR

. TP.

TEST

0

IN
ONE

--

c

0901 0103,104,106

IN

OHMS

OHMS

M 1

MEGOHM

VALUES

PICOFARADS. LESS

IN

MICROFARADS .

CONTROL

CONTROL

TERMINAL

POINT

Rl06
220

-

e

EOc

()107,109

ONE

AND

r-~~~--,----A

-----

,0

E8B

~~--

0111,112

c

0 0

Rill

..

·

10

_____

~

0110

Rl44

10

,-

-

-T~I049

-+--------,

A

Till

I

_j

Cll7

1'001

~--------~W~H~GN

--L

Cl25

JO,OI

WK-GN·BR

Rl26

CRIOI

4.7V

~-~

B~.--------__.AT50B

Rl45

10

Rl21

10

510

AT509

ATI04

·

IOV

AT532

Rl27

220

J.O()

CIIB

_ j

I

Figure 8-4.

Schematic

MHz amplifier.

circuit

diagram

of

the

40-80-

8-5

Ref.

No.

CAPACITORS

C20I
C202
C203
C204
C205
C206
C207
C208
C2IO
C80I
C802
C803
C902
C903
C904
C905

RESISTORS

R20I
R202
R203
R204
R205
R206
R207

R~08

R209
R210
R211
R2I2
R2I3
R2I4
R2I5

R917 Pot. ,
R918
R9I9
R920
R92I
R922

MISCELLANEOUS

CR203

CR204
L80I
L802
L803

Q20I
Q202
Q203
Q204

T20I

T202

Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Electrolytic,
Mica,
Mica,
Mica,
Filter,
Filter,
Filter,
Filter,

Composition,
Composition,
Composition,

Composition,
Composition,
Composition,

Composition,

Composition,

Composition,
Composition,
Composition,
Composition, 3 k!1
Composition,
Composition,
Composition,

Comp., 1 k!1

Power,

Composition,

Composition,

Composition,

Composition,

Type
Type
Choke, Molded, 0.82
Choke, Molded, 0.82
Choke, Molded, 0.39
Type

TD-IOO
Type
Type
Type

2N3646

Coil
Transformer

O.OOI

0.001

0.001
24
220
O.OOI
IO

0.001

I70

pF

255

pF

232

pF
2500
2500
2500
2500

Wire

MS7330
MS7330

2N2369
2N3646

Description

IJF

+80-20% 500 V

IJF

+80-20% 500 V

IJF

+80-20% 500 V

pF

±5%

500 V 4410-0245

pF

±5%

IJF

+80-20% 500 V

pF

±IO%

IJF

+80-20% 500 V

IOO

iJF

+I50-10%
±I% 500 V
±I% 500 V
±I% 500 V

pF
pF
pF

pF

I 50 n

±5%

47

!1

±5%

1.5

kn

±5%

150

!1

±5%

4.7

k!1

±5%

IO

!1

±5%

20

!1

±5%

24

!1

±5%

24

!1

±5%

20

!1

±5%

IO

!1

±5%
±5%

910 n

±5%

910

!1

±5%

IOO

n

±5~I/4

±IO

Wound, 0. 7

30

!1

±5%

30

!1

±5%

30

!1

±5%

30

!1

±5%

±IO%

±IO%

±10%

Ass.

500 V
500 V

I5

V 4450-2800

I/

4 W

1/4

W

I/4

W

I/4

W

l/4

W

l/4

W

I/4

W

l/4

W

1/4

W

1/4

W

I/4

W

I/4

W

I/4

W

I/

4 W

W 6099-1105

0

!1

±10%

1/4

W

I/4

W

I/4

W

1/4

W

PARTS

LIST

GR

Part

No.

4404-2I09
4404-2I09
4404-2I09

4404-I225
4404-2I09
4404-0I08
4404-2I09

4710-0170
4710-0434

4710-0411
5280-0100
5280-0100

5280-0100
5280-0100

6099-1155
6099-0475
6099-2155

6099-1155
6099-2475
6099-0105
6099-0205
6099 -0245
6099-0245
6099-0205
6099-0105
6099-2305
6099-I915

6099-I915

6000-0300

6670-8709

6099-0305

6099-0305

6099-0305

6099-0305

6082-I027

6082-1027
4300-7524
4300-7524
4300-7523

82I0-1130

82IO-I052

82IO-I119
82I0-11I9

5000-2710

I383

-2200

Fed.

Mfg.

Code

72982
72982
72982
72982
72982
72982
72982

72982
56289
729I5

83I,

O.OOI

83I,

O.OOI

83I,

O.OOI
811, 24
83I,

220
83I,

O.OOI
83I,

IO
83I,

O.OOI
017872

DMI5

Mfg.

pF

pF

pF

(4CR),

Part

IJF

+80-20%

IJF

+80-20%

IJF

+80-20%

±5%

±5%

IJF

+80 -20%

±5%

iJF

+80-20%

I70
729I5 DMI5 (4CR), 255
729I5 DMI5 (4CR), 232
0112I

0112I

0112I
0112I

75042
75042
75042
75042
75042
75042
75042
75042
75042
75042 BTS, 20
75042
75042
75042 BTS, 9IO

75042
75042

0112I

75042
75042
75042
75042
75042

I3327

13327
99800
99800
99800
56289

FIB,

2500,

FIB,

2500

FIB,

2500

FIB,

2500

I50

BTS,
BTS, 47
BTS, 1.5

I50

BTS,
BTS, 4. 7
BTS,

IO
BTS, 20
BTS, 24 n
BTS, 24

10

BTS,
BTS, 3

k!1

9IO

BTS,

BTS,

IOO

JU, I

k!1

AS-10,

30

BTS,

30

BTS,

30

BTS,

30

BTS,

MS7330
MS7330
1025-I8,
I025-I8,
1025-10,

TD-100

!1

k!1

k!1
!1
!1

!1

!1
!1

±IO%

0.7
!1
!1
!1

!1

0.39

pF
pF
pF
pF

!1

±5%

±5%

!1

±5%

±5%
±5%
±5%
±5%
±5%
±5%
±5%

!1

±5%

!1

±5~

!1

±5

!1
±5%
±5%
±5%
±5%

0.82

0.82

±5%
±5%

±IO%

±10%
±10%
±IO%

93916 2N2369
07263 2N3646
07263 2N3646

24655
24655

5000-2710

1383-2200

n

No.

pF
pF
pF

±I%
±I%
±I%

Fed.

Stock

No.

5910-983-9994
5910-983-9994
5910-983-9994

5910-983-9994
5910-983-9994

5910-034-5368

59I5-908-I892
59I5-908-I892
59I5-908-I892
59I5-908-I892

5905-683-2243

5905-683-2243
5905-686-9998
5905-809-8596

5905-809-8596
5905-682-4097

5905-644-6789

5960-682-7755

8-6

•

Figure 8-5.
oscillator
P/N

1383-2721.

Figure 8-6.
the

regulator

(refer

to

paragraph 4-1

Etched-circuit·board

and

modulator.

The

20.MHz low-pass filter is

circuit

etched

I.

The

board,

assembly

complete

P/N

for

the

board

is

hidden

by

1383-2741

NOTE: The number appearing

The

dot

on

the

foil

on

the

at

the

transistor socket indicates

foil side

is

not

the

part

number.

the

collector lead.

INPUT

CABLE

r·,

\_;

AT202J.

RD

,-,

I

I o

~--

/

I

IR201

150

IArZOI

T I

C202

1

.oo1

-

R202

47



T201

3

MODULATOR

R207

20

AT2C

0

BOTTOM

E C 8

(cOO')

~

E G 8

0201

VIEW

R920

30

R919

30

OF

TRANSISTORS

0202

I

I

I

I

I

AT204

I AT203

L _

0203,204

R203

1.5K

-7V

R205

4.

7K

BOARD

I

I

1383-2721

24

.001

0204

'~'J""

C210

R212

3K

C205

220

60

MHZ

OSCILLATOR

R214
910

.

IOO~F

NOTE

1.

POSITION

SHOWN

2.

CONTACT
EXPLAINED
SUPPLIED

3.

REFER
UCTION
APPEARING

4.

RESISTORS 1/2

OF

ROTARY

COUNTERClOCKWISE.

NUMBERING

ON

IN

INSTRUCTION

TO

SERVICE

BOOK

FOR

ON

SWITCHES

OF

SEPARATE

NOTES

VOLTAGES

DIAGRAM.
WATI.

UNLESS

SWITCHES

SHEET

BOOK

.

IN

INSTR-

SPECIFIED

5.

RESISTANCE

K - 1000

6. CAPACITANCE VALUES
OVER
THAN

7. 0 .

8. G

9. AT-

10. TP-

IN

OHMS

IN

PICOFARADS.

ONE

IN

MICROFARADS.

KNOB

CONTROL
SCREWDRIVER
ANCHOR

TERMINAL

TEST

POINT

OHMS

M 1

CONTROL

MEGOHM

ONE

AND

LESS

r - - - - - - T201

I
I

MODULATOR

R2

20

07

FILTER

C202

1 .oo1

-

I

I

I

I

AT204

I

I

AT203

----

L-

SIS

TORS

BASE

SE

~COLL

E~

0203,204

R202

47

R203

I.~K

-7V

R20~

4.

7K

BOARD

I

I

1383-2721

R21

3K

2

60

MHZ

OSCILLATOR

R214

910

AT

206-

R21~

100

I

R922

- -'V\31'.0-

I

_j

Tc902

-::-2500

-,--W-H-·R-0--84R

C903

T

-

Figure 8-7. Schematic circuit diagram

ator, modulator,

2~00

-

~

~~32

and

2~MHz

low-pass filter.

of

the oscill-

8-7

Ref.

No.

CAPACITORS

C301
C302
C303
C304
C305
C306
C307
C308
C309
C310
C311
C312
C313
C314
C315
C316
C317
C318
C319
C320
C321
C322
C323
C324

TRANSISTORS

Q301
Q302
Q303
Q304
Q305
Q306
Q307
Q308
Q309
Q310

RESISTORS

R301
R302
R303
R304
R305
R306
R307
R308
R309
R310
R312
R313
R314
R315
R316
R317
R318
R319
R320
R321
R322
R323

Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Ceramic,
Ceramic,
Electrolytic,

Electrolytic,

Electrolytic,
Electrolytic,
Electrolytic,

Ceramic,

Ceramic,
Electrolytic,
Electrolytic,
Electrolytic,

Electrolytic,
Electrolytic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,
Ceramic,

Type
Type
Type
Type
Type
Type
Type
Type
Type
Type

Composition, 4 70 n ±5% 1/2

Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Pot.,
Pot.,

R324 Pot. ,
R325

Pot.,

R326 Pot.,
R327
R329
R330
R331
R332
R333
R334
R335
R336
R337
R338
R901

- R902
R903 ,Film,

Pot.,
Film,
Film,
Composition,
Composition,
Composition,
Composition,
Thermist
Composition,
Composition
Composition,
Film,
Film,

PARTS

LIST

GR

Part

No.

4450-2800

4404-G515 72982 831,

4450-5707

4400-2054

4400-2054
4450-2610

4450-5589

4400-2050
4404-0628

8210-1129

51
51

0.47

0.47

0.1

0.1

0.1

0.1
62

27

2N3640

Description

200

1-1F

+150-10% 6 V 4450-2610

100

1-1F

+150-10% 15 V

200

1-1F

+150-10% 6 V 4450-2610

100

1-1F

+150-10% 15 V 4450-2800

1-1F

±5%

500 V

1-1F

±5%

500 V 4404-0515

200

1-1F

+150-10% 6 V 4450-2610

330

1-1F

±20%
330
200
200

200
600
22
22
100

1-1F
1-1F
1-1F

1-1F
pF
pF

1-1F
1-1F

1-1F
1-1F

±10%
±5%

1-1F
1-1F
1-1F

±20%

±20
1-1F
1-1F

1-1F

±20%
±20%
±20%
±20%

6 V

±20%

6 V 4450-5707
+150-10% 6 V 4450-2610
+150-10% 6 V 4450-2610

25 V

% 25 V
+150-10% 6 V
+150-10% 3 V

±20%

15 V 4450-5300

±20%

15 V 4450-5300

+150-10% 15 V 4450-2800

25 V 4400-2050
25 V 4400-2050
25 V 4400-2050
25 V

500 V

500 V 4404-G275

2N3646 8210-1119
2N3646
2N3640
2N3646
2N3646
2N3250

8210-1119
8210-1129
8210-1119
8210-1119

8210-1089
A211 8210-1168
A211 8210-1168
2N3563

8210-1066

W 6100-1475

620 n

±5%

1/2

Comp.,

Comp.,

Comp.,
Comp.,
Comp.,
Comp.,

75 n ±1%

536 n

or,

142.3 Q

96.2 n

142.3 n

330 n

±5% 1/2

51 n

±5%

510 n

±5% 1/2

220 n

±5%

910 n

±5

kn
kn

±5% 1/2

±5%

±5% 1/2
±5% 1/2

% 1
±5% 1/2
±5%

5.1

5.1
130 Q
4 7 n
680 n

330 n
51 n ±5% 1/2
510 n

±5
±5%
±5

kn

±5%

kn

±5% 1/2

±5% 1/2

±20%

±5%

% 1

% 1

1/2

110 n
470 n

2.4

2.4

47 n
50 n
200 n

62 Q ±5%
10 Q ±5% 1/2

240 Q

±5%

500 n

±20%

±1% 1/8

430 n

w

±5% 1/2
43 n ±5% 1/2
1

kQ

±5

% 1

130 n

±5% 1/2

500 n

±10%

1.8

kn

4. 7 n

±1%

±5% 1/2

±5% 1/2

±5% 1/4

, 47 n

±1%

±1%

W
W

1/2

W

W

1/2

W

/2

W

W 6100-2515

1/2

W

W

1/2

W

W 6100-1685
W 6100-1335

W 6100-0515

/2

W

1/2

W

/2

W

1/2

W 6100-2245
W

W

1 W

W
W

1/2

W

W 6100-1435

W

/2

W

W 6100-1135

W 6100-2185

W

W

6100-1625
6100-1335 01121
6

100-0515
6100-1515
6100-1225 01121
6100-1915

6100-2515
6100-1135
6100-04

6100-1515
6100-1115
6100-1475

6100-2245
6100-0475
6040-0050
6110-1205
6100-0625 01121
6100-0105
6100-1245
6040-0300
6550-0075
6250-0536 75042

6100-0435 01121
6100-2105

6740 -1607
6100-04

6099-94
6610-1300
6610-1200
6610-1300

Fed.

Mfg.

Code

37942
56289
37942
56289

TI,
017872
TI,
017872

72982 831,
37942
37942
37942
37942
37942
80183
80183
37942
37942

TI,
TI,
TI,
TI,
TI,
5C13,
5C13,
TI,

TCM,
56289 150D226X0015B2
56289 150D226X0015B2
56289
80183

017872

5C13, 0.1
80183 5C13, 0.1
80183 5C13, 0.1
80183

5C13, 0.1
72982 831,
72982 831, 27

93916
07263

2N3640

2N3646
07263 2N3646
93916

2N3640
07263 2N3646
07263
80211

2N3646

2N3250
73445 A211
73445 A211

07263 2N3563

01121
01121

RC20GF471J
RC20GF621J

RC20GF331J
01121
01121

RC20GF510J

RC20GF511J

RC20GF221J
01121
01121
01121
01121

75

01121 RC20GF470J
01121
01121
01121
01121
01121

RC20GF911J

RC20GF512J

RC20GF512J

RC20GF131J
RC20GF681J

RC20GF331J
RC20GF510J
RC20GF511J

RC20GF111J
01121 RC20GF471J
01121
01121
01121

RC20GF242J
RC20GF242J

RC20GF470J
01121 FWC, 50
01121

RC32GF201J

RC20GF620J
01121
01121

RC20GF100J

RC20GF241J
01121 FWC, 500
75042

MEF-TO,

CEA,
01121

RC20GF431J

RC20GF430J

01121 RC20GF102J

75
75

01121
02606
01121
01121
01121
03888
03888
03888

RC20GF131J

LA25L2

RC20GF182J

RC20GF470J

Type

A3AJ01

A3AJ01-E

A3AJ01

Mfg.

200

1-1F

200

1-1F

51

pF

51

pF

200

1-1F

300

1-1F

300

1-1F

200

I-IF

200

1-1F

0.4 7 1-1F

0.47

200

1-1F

600

62

pF
pF

536 Q

CB,

Part

No.

6V
6 V

±5%

±5%

6 V
6 V
6 V
6 V
6 V

±20%

1-1F

±20%

6 V

1-1F

3 V

1-1F

1-1F
1-1F
1-1F

±10%
±5%

Q ±20%

Q

±20%

75 n ±1

±1%

4. 7 n

±5%

%

Fed.

Stock

No.

5910-945-1836
5910-034-5368
5910-945-1836
5910-034-5368

5910-945-1836

5910-945-1836
5910-945-1836
5910-974-5696
5910-974-5696
5910-945-1836
5910-729-9975
5910-752-4270
5910-752-4270
5910-G34-5368

5910-974-5695
5910-974-5695
5910-974-5695
5910-974-5695

5961-945-4108

5905-192-3973

5905-

279-1761
5905-192-3971
5905-

279-3517
5905-279-3511
5905-279-3513
5905-279-3509
5905-279-2019
5905-279-2019
5905-252-5436
5905-252-4018
5905-195-6791
5905-192-3971
5905-279-3517
5905-2

79-3511
5905-279-3515
5905-192-3973
5905-279-1877
5905-279-1877
5905-252-4018

5905-279-1760
5905-190-8883
5905-279-2593
5905-072-7795

5905-279

-3512
5905-279-1887
5905-195-6806
5905-252-5436

5905-190-8881
5905-252-4018

--~-------

Ref.

No.

RESISTORS

R904
R905
R906
R907
R908
R909
R910

R911
R912
R913
R914
R915
R916

R923
R924

R925

MISCELLANEOUS

CR301

CR302

(cont)

Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Film,
Composition,
Thermistor'
Composition,

Type
Type

Description

96.2 n

±1%

142.3 n

96.2

142.3 n

96.2

142.3 n

96.2 n

142.3

96.2 n

142.3

96.2 n

142.3

65.8 n

±1%

r!

±1%

±1%

r!

±1%

±1

±1%

r!

±1%

±1%

r!

±1%

±1%

r!

±1%

±1%

100 n

100 n

22 n ±5%

IN3604

IN3604 6082"1001 24446
L301 Choke, Molded, 0.15
L302

Choke, Molded, 0.15
L303 Choke, Molded, 10
M901

-----------

PARTS

Part No.

6610-1200 03888 A3AJ01-E
6610-1300 03888
6610-1200 03888 A3AJ01-E
6610-1300 03888 A3AJ01
6610-1200 03888 A3AJ01-E

%

±5% 1/2

W

±10%

1-1H

±10% 4300-0101 99800

1-1H

±10%

flH

±10%

6610-1300
6610-1200 03888

6610-1300 03888

6610-1200 03888
6610-1300 03888
6610-1200

6610-1300 03888
6610-0900

6100-1105

6740-1606

6095-0022 01121 HM, 22 n

6082-1001

4300-0101 99800
4300-2200 99800 1536,10
5730-1411

LIST

(Cont)

FMC

03888

03888 A3AJ01-E
03888 A3AG01

01121
02606

24446

24655

Atfg. Part No.

A3AJ01

A3AJ01
A3AJ01-E

A3A 01
A3AJ01-E
A3AJ01

A3AJ01

RC20GF101J
Type

LB21J1

±5

IN3604
IN3604

1536, 0.15
1536, 0.15

1-1H

5730-1411

%

1-1H

flH

±10%

±10%
±10%

Stock

P ed.

No.

5905-190-8889

5961-995-2199
5961-995-2199

8-8

•

Figure

8-8.

Etched-circuit

video

amplifier

is P/N 1383-2731.

and

attenuator.

NOTE: The number appearing

The

dot

on

the

foil

at

the

transistor socket indicates

on

board

the

assembly

The

complete

foil side

SO
30

1

R:

. : (

·

~.1.

CABLEI

-=

YE I

I

I
I

I

for

the

board

is

not

the

part

number.

the

collector lead.

S

1.

POSITION OF R
SHOWN COUNTI

2. CONTACT

3. REFER TO SERY

4. RESISTORS

EXPLAINED
SUPPLIED

UCTION

BOOK

APPEARING

NUMB

ON

IN

ON

1/2

WI

IN

I

---

1

+IOV

AT:504

AT~30

WH

R329
75

IW

R330
536 •

118W

RO

I

;

-

--

---

R310

130

IOO~fT

~~02

_,

C302

+

-:-

R307
910

VIDEO

AMPLIFIER

BOARD

1383-2731

R313
680

R318

470

.

SWITCHING

1.

POSITION ~ ROTARY
SHOWN

COUNTERO.OCKWISE.

2.

CONTACT

NUMBERING ~ SWITCHES

EXPLAINED

ON

TO

BOOK

SERVICE

ON

112

SEPARATE SHEET

FOR

DIAGRAM.

WATT.

SUPPLIED IN INSTRUCTION

3.

REFER
UCTION
AI'PEAIIING

4.

RESISTORS

DIAGRAM S901

NOTE

UNLESS

SWITCHES

BOOK

NOTES

IN

VOLTAGES

Sf'£C1Fim

.

INSTR-

R30~

510

R306

220

C304

r-IOO~F

EOs

BOTTOM VIEW

5.

RESISTANCE IN OHMS

K - 1000 OHMS M • I MEGOHM

6.

CAPACITANCE VALUES ONE AND
OVER IN

PIC~

THAll

7. Q KNOB CONTROL

8.

~

9. AT - ANCHOR

10. TP -

ARADS. LESS

ONE IN

MICR~ARADS

SCREWDRIVER CONTROL

TER-._

TEST

POINT

R309

5.1K

C B

EOC

0 307,309 0301,304,306

.

0306,310

OF

TRANSISTORS

EgB

030~.303

R316
510

R317

110

Rotary
from
digit
tion.
next
refer
position

the

screw
other
03, 04,
section.
contact
respective!

R320

2.4K

switch

the

the

panel

contact

section

back

contact.

sections

end

is

the

of

The

section

to

clockwise

above

contacts

etc),

is

the

are

proceeding

A

suffix F or R indicates

on

the

front

y.

are

of

the

number

nearest

the

2,

etc.

The

Contact

from a strut

locating

numbered

clockwise

or

rear

shown

as
shaft.
refers

to

panel

next

two

01

is
screw
key),

sequentially

around

of

the

---IOV

AT532

viewed

The

the

is 1,

the

(usually

and

that

section,

R92~

first

sec-

the

digits

first

the

(02

the
the

22

4W

---

[TC

TO

,

+-lOY

AT~30

WHROBK

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

----l

C312

0 .

471

23

J

--IOV-

AT532

-:-

R925

22

4W

[TO

R329

75

IW

--

C31~

600~F

AT308

TO

AT305

R338

4.7

I/4W

-=J;c?r

C314

200~F

L303

IO~H

R333

680

C309

330~F

R336

910

METER

CR301

I 50302

CIRCUIT

R321

(\

47

AT307

CABLE

QR~2

WH-VT-GY

111901

BK

cw

5901 5901

203R

· 103t-

O.IMY

AT

906._-'VII'v-,..__.

R924

t•

IOO

AT908~._;.;,fv.-J,--e

\METER FULL SCALE I

'I

I-----109F

~----IIOF

L------IIIF

J

-80d8
102t

-2008

-IOdB

OdB

,",

CABLE

GN

J9

01

s

viewed

The

first

the

sec-

is

1,

the

wo

digits

the

first

(usually

and

the

ally

(02,

und

the

that

the

section,

Figure 8-9.

amplifier

and

Schematic
attenuator.

circuit

diagram

of

the

video

8-9

Ref.

No.

CAPACITORS

C501
C502
C503

Ceramic,
Ceramic,
Electrolytic,

+100-10% 10 v

C504
C505

Electrol%tic,

[phone] v

Electrolytic,

+100-10% 25 v

C506

Electrolytic,

+100-10% 25 v

C507

Electrolytic,

+100-10% 25 v

C508

Electrolytic,

+100-10% 25 v

C509
C510
C511
C512
C513
C514
C515
C516
C517

C518

C519 Ce
C520

DIODES

CR501
CR502
CR503
CR504
CR505
CR506
CR507
CR508
CR509
CR510 Ty
CR511

Ceramic,
Ceramic,

Electrolytic,

Ceramic,
Electrolytic,
Ceramic,
Electrolytic
Ceramic,
Ceramic,

Ceramic, 0.47

ramic,

Electrolytic

Type

IN4140 6081-1014

Type

IN4140 6081-1014

Ty

pe

1N4140 6081-1014

Type

IN4140 6081-1014

Type

IN3253 6081-1001

Type

IN3253

Type

1N3253 6081-1001

Type

1N3253

Type

IN3253 6081-1001

pe

IN3253 6081-1001

pe

IN3253

Ty

CR512 Type 1N3253
CR513 Type
CR514 Ty

CR515

TRANSISTORS

Q501
Q502
Q503
Q504
Q505
Q506

RESISTORS

R501
R502

IN4009 6082-1012

pe

1N750A 6083-1028 07910

Type

IN4009 6082-1012

Type

2N3905

Type

2N3903

Type

2N3740

Type

2N3905

Type

2N3903

Type

40250

Composition,
Composition,

R503 Low Power

2W

R504 Low

Power, Wire

2W

Low

R505

Power,

2W
R506
R507
R508
R509
R510
R511
R512
R513
R514
R515
R516
R517
R518

Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Composition,
Low

Power,

2W
R519
R520

Composition,
Composition,

PARTS

LIST

Description

0.01 flF +80-20 % 500 V

0.0068

+80-20

3600, 1800, 1800

450, 225, 225
1500, 750, 750

% 500 V

flF

flF

iJF
1500, 750, 750 iJF
1500, 750, 750

iJF
1500, 750, 750 iJF

0.01

iJF

+80-20

0.01 iJF
200

470

pF

100

% 500 V

+80-20

% 500 V

iJF

+150-10% 6 V
±10% 500 V
i-LF

+150-10% 15 V

0.47 iJF ±20% 25 V
, 200 iJF +150-10 % 6 V

0.1 iJF ±20% 25 V

GR

Part No. Mfg.

4406-3109
4406-2689
4450-5609

4450-4000
4450-0700

4450-0700 90201 203828S10C10X2
4450-D700 90201
4450-0700
4406-3109

4406-3109
4450-2610
4404-1478
4450-2800
4400-2054
4450-2610
4400-2050

Fed.

Code

72982 811, 0.01
72982

80183

74861
90201

Mfg.

Part

flF

0.0068 +80-20%

811,
D-38841

1B850RT
203828S10C10X2

203828S10C10X2
90201
72982 811, 0.01

72982

37942

72982

56289
80183 5C13,
37942

203828S10C10X2

iJF

811,

0.01

TT,

831, 4

iJF

200 iJF 6 V

70

pF

Dl7872

0.47

TT,

200

i-LF

80183 5C13, 0.1 iJF

0.1 iJF ±20% 25 V 4400-2050 80183 5C13, 0.1 iJF
iJF ±20% 25 V

0.011-LF

, 15

i-LF

+80-20

4400-2054

% 500 V 4406-3109 72982 811, 0.01iJF

80183

+150-10% 15 V 4450-3700 37942

5C13, 0.47 iJF ±20%
TT,

15

iJF 15 V

13327 IN4140
13327

1N4140
13327 IN4140
13327 1N4140

6081-1001
6081-1001

6081-1001
6081-1001

79089
79089
79089

79089

79089
79089

79089

79089

1N3253
1N3253
1N3253

IN3253

IN3253

IN3253

IN3253

IN3253
24446 IN4009

IN750A

2N3903

2N3903

RC20GF621J

BWH,

2.7

BWH,

2.7

75042

BWH,

2.2

RC20GF511J

RC20GF331J

01121 RC20GF330J

BWH,

75042

2.2

7.5

620

Wire

Wire

33
680
33
330

100
510
330
330
330
33

680
33

Wire

75

1.5

24446 IN4009

8210-1114
8210-1132
8210-1121
8210-1114
8210-1132
8210-1095

kfl

±5% 1/2

fl

±5

Wound, 2. 7

Wound,
Wound, 2.2

fl

±5

fl

±5% 1/2

fl

±5%

fl

±5%

fl

±5% 1/2

fl

±5% 1/2

fl

±5%

fl

±5%

fl

±5%

fl

±5%

fl

±5%

fl

±5%

Wound, 2.2

fl

±5%

kfl

±5%

W 6100-2755 01121 RC20GF752J

% 1/ 2 W

fl

±10%

2.7

fl

±10%

fl

±10%

% 1/ 2 W

W

1/2

W 6100-0335 01121 RC20GF330J

6100-1625 01121

6760-9279 75042

6760-9279 75042

6760-9229

6100-0335 01121 RC20GF330J
6100-1685 01121 RC20GF681J 5905-195-6791

1/ 2 W 6100-1335 01121 RC20GF331J

W

W

1/2

W

1/2

W

1/2

W

1/ 2 W

1/2

W

1/2

W

fl

±10%

1/2

W

1/2

W 6100-2155 01121 RC20GF152J

6100-1105 01121 RC20GF101J 5905-190-8889
6100-1515 01121
6100-1335 01121 RC20GF331J
6100-1335 01121
6100-1335 01121 RC20GF331J
6100-0335 01121 RC20GF330J
6100-1685 01121 RC20GF681J 5905-195-6791
6100-0335

6760-9229
6100-0755 01121 RC20GF750J 5905-279-1758

04713 2N3905

93916
93916 2N3740
04713 2N3905
93916
12672 40250

No.

+80-20

+80-20
+80-20

±10%

iJF ±20%

6 V

+80-20

fl

±10%

fl

±10%

fl

±10%

fl

±10%

5910-754-7049

%

5910-448-5397
5910-976-9415

5910-976-9415
5910-976-9415
5910-976-9415
5910-754-7049

%

5910-754-7049

%

5910-945-1836

5910-034-5368
5910-974-5696
5910-945-1836
5910-974-5695
5910-974-5695
5910-974-5696
5910-754-7049

%

5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-814-4251
5961-892-8700
5960-754-5897

5961-892-8700

5905-249-4195
5905-279-1761
5905-794-3857

5905-794-3857

5905-192-4490
5905-192-4490

5905-192-3971
5905-279-3511

5905-192-3971
5905-192-3971
5905-192-3971
5905-192-4490

5905-192-4490

5905-841-7461

Fed.

Stock

No.

8-10

Ref.

No.

RESISTORS

R521
R522
R523
R524
R525

MISCELLANEOUS

F501

F502
PL50l
P50l

S50l
S502

{cont)

Film,
Co

mposition,

Film

, 4.42 k!J ±1% l / 4 W
Comp
Po

t.,

Wire

S10-B10
S10-Bl0
Power,
Pilot
Power/OFF
Line

Voltage

S0901 Tube

T501

Power

Description

5.11

H! ±1% l / 4 W

1.6

os

iti

on, 100

Wound, 1 k!J ±10%

6/10A

3/10A

Input

Selector

k!J ±5% 1/ 2 W

!J ±5% l / 2 W

PARTS

LIST

(Cont)

Part

No.

6350-1511
6100-2165
6350-1442
6100-1105
6056-0138

5330-1100
5330-0800
4240-0600
5600-0309

7910-1300

7910-0831 42190
7530-0200
0485-4037

FMC

75042
01121
75042
01121
11236

71400
71400
91146

71744 #330
04009

CEB,
RC20GF162J
CEB,

RC20GF101J

115' 1

MDL, .6 Amp
MDL, .3
45002

83053

4603
81350
24655

TS102C01

0485-4037

Mfg.

Part No.

5.11 k!J ±l%

4.42 k!J ±l%
k!J ±10%

Amp

-SA

Fed.

Stock

No.

5905-279-3507
5905-190-8889

5920-280-3161
5920-235-8362

5930-909-3510

5935-232-3

758

ll

0

0

Figure 8-10. Etched-circuit-board assembly

power·supply.

The

complete

board is P/N 1383-2750.

for

the

NOTE: The number appearing on

The

dot

Figure 8-11. Etched-circuit-board assembly

±10

on

V regulator circuit.

P/N

1383-2741.

the

foil

at

the

transistor socket indicates

The

the

complete

foil side

is

not

for

the

board is

the

the

collector lead.

part

number.

JPOWERJ

5501

1383-

r---

BOARD

2750

ATI09

AT508

ATIII

33

R515

33

R514

330

R516

2.2 ,

2W

1.

POSITION

OF

SHOWN

COUNTERCLOCKWISE.

2. CONTACT NUMBERING
EXPLAINED
SUPPLIED

3.

REFER
UCTION
APPEARING

4. RESISTORS 1/2 WATT.

TO

BOOK

ON

IN

SERVICE

NOTE

ROTARY

SEPARATE

INSTRUCTION

NOTES

FOR

VOLTAGES

ON

DIAGRAM.

UNLESS

SWITCHES

OF

SWITCHES

SHEET

BOOK

IN

BOTTOM VIEW

E B C

~

0501,502
0504,505

SPECIFIED

5.

6. CAPACITANCE VALUES

.

7. 0 KNOB CONTROL

INSTR-

8.

9. AT-

10. TP. TEST

OF

RESISTANCE

K - 1000

OHMS

OVER

IN PICOFARADS. LESS

THAN

ONE

IN

{§;)

SCREWDRIVER
ANCHOR

POINT

TRAN SISTORS

E

0

0503,506

IN

OHMS

M 1

MEGOHM

ONE

MICROFARADS.

CONTROL

TERMINAL

AND

BOARD

138

1383-2750

---

r-

YE

e

9

VT

BOARD

ATI09

WH·GN·Bt<

AT50B

WH-GN

Alii

·BR

I

WH·GN

~501

Wtj-BlJ-BK
AT528

R5l5

33

33

C511

200

C515

200

.

C509

+

R512

.

01

330

---

R505

22

2W

CR513

R509

330

R513

330

R514

330

R518

2.2,2W

BOARD

R511
510

C513

100

0504

1383

- -

--

CR514

4.7V

-2741

- - -

C512

470pt

R522
16K

- -

- - - -

R520

1.5K

R525

IK

cw

C520

15

--

AT~23

WH·GY

·BR

AT~21

I

AT~30

W

R521

5.11K

114W

R523

4.42K
114W

--

-

~T~~

·RO

C514

0.47

AT531

C518

0.47

WH-f!O~R

AT532

WH-G'I'-GN

I

AT525

I

WH-GY.RO

I

AT524

I

WH-VT-111<

_j

-BK

AT903

0503

•IOV C902
ATI03
AT304

-IOV

C903
ATI04
AT305

0506

BOTTOM

E B C

'e5'

0501,502
0504,505

NSTR

VIEW

OF

TRANSISTORS

E

0

0503,506

SPECIFIED

5.

RESISTANCE IN OHMS

K - 1000 OHIIIS Ill I IIIEGOHM

6. CAPACITANCE VALUES ONE AND
OVER

IN

PICOF

THAN

7.

0 KNOB CONTROL

·

8.

(§}

9. AT.

10. TP.

ARAOS. LESS

ONE

IN

IIIICROf

SCREWCJliVER CONTROL
ANCHOR

TERMINAL

TEST

POINT

ARADS.

Figura 8-12. Schematic

supply.

circuit

diagram

of

the

power

8-11

GENERAL

WEST

CONCORD,

617

SALES

RADIO

MASSACHUSETTS

369-4400

AND

SERVICE

01781

AUSTRALIA

Warburton

Pty.

Ltd.
Sydney,
Brisbane,

CANADA-

•

General

Radio
Toronto,

Montreal,

DEMOCRATIC

OF

THE

Rudolph·Desco
New

York

INDIA

Motwane
Bombay,
l(anpur,
Bangalore,

Frankl

Melbourne,

Adelaide

C&nad&

Ottawa

CONGO

Private

Clllcutta,

New

Delhi,

Madras

lndustnes

Limited

REPUBLIC

Co.,

Inc.

Limited

Lucknow,

ATLANTA

•BOSTON
BRIDGEPORT

•CHICAGO

•cLEVELAND
COCOA BEACH

•DALLAS
DAYTON

JAPAN

Mi

dortya

Tokyo

KOREA

M-C

International

San

Francisco,

Seoul,

Korea

MALAYSIA

Vanguard
Kuala

Lumpur,

MEXICO

Fredin

S.A.

Mexico,

NEW

ZEALAND

W, & K.

Auckland

PAKISTAN

Pakland

Karachi

PHILIPPINES

T.

J.

Wolff & Company

Mllkati,

PORTUGAL

Ad.

Auriem&,

New

York,

Madrid,

Electric

and

Company

O,F,

McLean

Corporation

RIZIIII

and

Inc.

Lisbon

404 633-6183

646-0550

617
203 377-0165

992-0800

312
216 886-0150
800 241-5122
214 637-2240
513 434-6979

Co.,

Ltd.

SINGAPORE

Malaysia

Limited

SPAIN

WEST

REPUBLIC
AFRICA

G.

H.

Langler & Co.,

Johannesburg

SOUTH
AMERICA

Ad.

Auriema,

New

York

TAIWAN

He•ghten

Taipe•

THAILAND

G.

Simon

Ltd.

Bangkok

TURKEY

Mevag

Eng•neering,

and

Industrial

Istanbul

DENVER
DETROIT
GREENSBORO

HOUSTON
HUNTSVILLE
INDIANAPOLIS

•LOS

ANGELES 213 469-6201

•NEW

YORK

INTERNATIONAL

CONCORD,

OF

SOUTH

and

CENTRAL

Inc,

Scientific

Radio

Company

Ltd.

Co.,

Ltd.

Trading

Corporation

MASSACHUSETTS

303 44 7-9225
313 261-1750
919 288-4316

713 622-7007

800 241-5122

317 636-3907

(NY) 212 964-2722

201

943-3140

(NJ)

ROCHESTER
PHILADELPHIA
SAN DIEGO

•SAN

FRANCISCO
SEATTLE
SYRACUSE

•wASHINGTON,
BALTIMORE

DIVISION

01781,

USA

• GENERAL

Helenastrasse 3, CH-8034, Z.Urich 34, Switzerland

AUSTRIA

OipL

lng.

Peter

Radio

(Overseas)

Rad

(U.K.)

0 / Y

<&

io

Limited

Marchetti

Company

Company

Wien

BELGIUM

Groenpoi·Belgique
Bruxelles

DENMARK

Semler & Matthiassen
K•benhaven

EIRE

General

General

FINLAND

Into
Helsinki

RADIO

S.

A.

COMPANY (OVERSEAS)

FRANCE

Ets

Radlophon

Paris,

Lyon

Radiophon

Corporation

New

York

GERMANY

General

Radio

Aviv

S. & Or.

Aoma,

NUssle•n

Oallegg1o

Ltd.

Guido

Genova,

Napoli

Groep

GmbH

Vertretung

Balottl

Verkoop

MUncnen
Norddeutsche
Or.-lng.
Wedel

GREECE

Marias
Athens

ISRAEL

Eastronics
Tel

ITALY

lng.
Milano,

NETHERLANDS

Groenpol

Amsterdam

315 394-2037
21

5 646-8030
714 232-2727
415 948-8233

206 GL4-7545

315 454-9323

301

946-1600

NORWAY

Gustav

A.

Ring

Oslo

SWEDEN

Firma

Johan

Solna

SWITZERLAND

S•yffar & Co.

ZUnch

UNITED

KINGDOM

•

General

Radio

IU,K,)

Limited

Bourne

End,

Bucklnghamshlre

YUGOSLAVIA

Sanford

de

Brun

Wlen,

Osterrelch

A/S

Lagercrantz

AG

Company

KB

•

Repair

services

are

available

at

these

offices.

PRINTED IN. U.S.A.

GENERAL

WEST

CONCORD, MASSACHUSETTS

RADIO

01781