HP 738A, 738AR Service and user manual

II:

C

•

01

...

HEWLETT-PACKARD

COMPANY

.-

-.

738AR

VOLTMETER

CALIBRATOR

CD

»

:II

"

co

OPERAT.lNG

AND

SERVICING

MANUAL

..

'"

J~~AA.'AAI~'---~

...

llaIUS""

o oat" J I

...

MODEL

738A/

AR

VOLTMETER CALIBRATOR

SERIALS

,.,..",..

PREFIXED:

..'"..

001

O!JTl'\If.LCCfO'I

...

-

--;:.

..

•

voLntETER CAU8RArOR

-,

~

,

....

....-

-

....

......".

~

-.

00202-2

Copyright HEWLETT-PACKARD COMPANY 1960 1501 PAGE MILL

ROAD,

PALO ALTO, CALIFORNIA,

U.S.A.

Printed:

10/61

Model 738A

SPECIFICATIONS

VOLTAGE RANGE:

LEVELS:

WORKING

VOLTAGE ACCURACY:

LONG-TERM STABILITY:

OUTPUT VOLTAGE FUNCTION·:

HUM

AND

DISTORTION:

ATTENUATOR ACCURACY:

microvolts

300

Calibration

to 300 volts

voltage 300

microvolts

.3, .5, 1, 2 and 3 volts with 10 and 100. and 0 to 3

volts

Tracking

in .5 volt

voltage

steps.

300 volts working voltage into

0.1% dc and 0.25%acafter

Less

than 0.1% dc

per

week.

DC

positive

rms

valueorac

Less

than 0.2%

Within ± 0.1%,

to ground, dc

400

total

or

± 5

one-half

drift

per

negativetoground,ac400

cycle

peak-to-peak

microvolts,

to 300 volts in

multipliers

.1

to 1 volt in.1volt

attenuator,

hour

week;

of .001, .01, .1, 1,

accurate

warmup.

less

than 0.25%acdrift

value.

whicheverislarger

steps

steps;

within

cycle

of

LOAD IMPEDANCE:

POWER SUPPLY:

DIMENSIONS:

WEIGHT:

•

Any

output frequency

Designed to

working into 10

200 volts will be

115/230

Rack Mount: 19

work

megohms

approximately

volts±10%,

inches

Rack Mount: Net 38

from

400 to 1000

iii

cps

into a 3 megohm input impedance. When

impedance, the voltage

from20to

0.15% high.

50-60

availableonspecial

wide, 7

lbs.

cycles,

inches

Shipping

approximately

high, 15

approximately

order.

350 watts

inches

75

deep

lbs

.

CONTENTS

Model 738A

SECTION I

SECTION

GENERAL DESCRIPTION

1 - 1

1 - 2

1 - 3

II

OPERATING INSTRUCTIONS

2 - 1

2 - 2

2 - 3

2 - 4

2 - 5 2 - 6

Introduction 'Power Operation on 230 Volts

Installation

External

Preventing Stability and Warmup Operating Calibrating

Cable

SECTION III THEORY OF OPERA

Load •

Errors

Instructions

the 738A

nON

From

Ground

Currents

PAGE

1-

1

1-

1

I - 1

II-I II-I

•

II

- 1

11-3

II-4

11-4

SECTION

IV

SECTION V

3 - 1

3 - 2

3 - 3

3 - 4

Introduction

DC

Generator

AC

Generator

Section Section

Output Attenuator

MAINTENANCE

4 - 1

4 - 2 4 - 3

4 - 4

4 - 5

4 - 6

Introduction Tube

Replacement Cleaning the Adjusting the Testing

and

Air

Filter

Frequency

Trouble

Shooting the

MethodsofCalibration

TABLE OF REPLACEABLE PARTS

TableofReplaceable

Parts

••

of the

AC

Output

Calibration

•.••..•..••••.•..••

iv

Generator.

III - 1 III - 1 III - 2 III - 2

IV

- 1

IV

- 1

IV

- 1 IV· IV

- 2 IV·3

V-I

1

Model 738A

Sect. 1

Page

1

....

SECTION

GENERAL

1-1

INTRODUCTION

The

Hewlett-Packard brator precision electronic design voltages precision within ±0.1%or±5 when loaded of3megohms. quired,

The rate rack regulated dc working rc which standard. derived resistive selected

attenuator The

andaseries

0.1% wirewound, sistors. volt working voltagesortracking

Calibrating 300 3 either 3

No Model 738A. voltage ventional

.,

738Aishigher Only read standards

isacompact,

generator

voltmeters,

assures

from

steps.

byameter

other

than weekly

I/ifJ

Voltmeter inter-connected panel.

oscillator

attenuator

volts

·sequence. voltsin1/2

standardizing

The

power

standard,

with AGC, and a

generates

The

from

the

network.

by a

simple

section.

section

of voltage

The

attenuator

standard

voltages

in

25

Two

0.1 volt to 1 voltin1/10 volt

The

cannotbeadjusted

voltmeter

special to

high-resolution

an

accuracy

laboratory

Model 738A

completely

for

calibrating

oscilloscopes,

accurate

0.3 Accuracy

No

Calibrator

voltage

supplywhich

the 400

300 volt

The

non-inductive,

precise

tracking

steps.

voltmeter

than

and

millivolt

Jlvolt,

with

operating

standardization.

units

generator

a conventional low

cycle

peak-to-peak

type of voltage

output

consistsofcontrol

dividers

accepts

and will

voltages.

run

from

steps

amplitude

accurately

since

the 0.1%

the

accuracyofmost

of

at

methods,

Voltmeter

self-contained,

high-impedance

etc.

reliable

up to 300 VOlts, in

of output

whicheverisgreater,

an

adjustments

consists

mounted on

produces

stabilized

300 volt

rms

selector

ranges

is

of the 738A output

meters

least

attenuator

input

of two

section

the

rms

voltage through a

and fed to the

constructed

ceramic-core

the

desired

deliver

300

microvolts

in

a .3, .5, 1, 2,

are

volt

stepsor0 to

included with

againstacon-

stabilityofthe

that

0.1%,orother

shouldbeused

Cali-

Special

calibrating

impedance

are

re-

sepa-

one

small

includes

300volts

distortion

amplifier

working

voltage

required

switches

with

re300

calibrating

available:

the

meters.

can

for

be

standardizing desired. a case

the

The standard

is

assures

Physically, housed attenuator attenuator or and two BNC

a

generator the

is

1-2

The

is

terminated recommended facturers' personnel. pin, added to a grounds suitable

standard,

the

available.

to

nectors

1-3

This operation, operation. primary

USor230 volt

illustrates place in particular

If

maximum

less

accurate

the

accuracy

Model 738A

19-inch

adequate

the

sections

section section

replacement

sectioniseasily

chassis.

POWER

three-conductor

in a

Association

The

the

instrument

receptacle.

two-contact

third

(ground)

Refer

are

made.

OPERATION

instrument

unless

The

that

both

the

power

Section

V,

line

the 738A when

voltmeter

of the 738A will depend upon

of the

meter

is

relay

ventilation.

instrumentisbuiltintwo

mounted on the

and a is

by

removing

connectors.

CABLE

power

polarized,

by the National

third

standard

leadinthe

to Section II

ON

is

normally specifically power

may

be

operation.

methods

line

fuse

TableofReplaceable

voltage

DESCRIPTION

maximum

accuracy

may

used.

designed

rack.

easily

for contactisan

two-blade

chassis To receptacle,orto

transformer

easily

of connection. Always

you

for

A fan in

generator

removed

a few The

accessible

cable

three-contact

protectionofoperating

use

this cable,anadapter

before

230

VOLTS

supplied

ordered

connected

The

schematic

with the

are

using

accuracy

is

not

important

be used, in which

mounting in a

the

cabinet

separately

front

panel, an

section.

for

service

screws,

circuitry

from

for

the 738A

connector

Electrical

offset

connector

when

used

connector

disconnect

ground

for

115 volt

for

230 volt

has

for

diagram

rating

Parts,

.

specified

for

The

knobs,

of

the

below

is

Manu-

round which

with a

in a

is

con-

a dual

either

re-

the

I

is

Sect.IIPage

0

Model 738A

TABLE

Output Voltage of

2-1.

INTERNAL RESISTANCE

1%

FOR

ACCURACY

AND

MINIMUM LOAD

Approximate

Internal

300 200 100 4000

50 30 20

10 580 58K

5

3

Resistance

Generator

in

Ohms

Resistance

Produces

in Output Voltage

0*

4000

400K 400K

2600 260K

1600 160K 1150 115K

295

180 18K

1%

29K

Load

which

Decrease

#

2 480 48K

I

1 420

.5

.3 .2 .1

260

170 17K 480 48K 420

42K

26K

42K

.05 .03 .02 125

260 26K

170

17K

12.5K

.01 66 6.6K .005

35

.003 21.5

.002 57 .001 .0005 .0003

* Within

#

The

minimum

prevent

ohm

the

limitsofthe

load shouldbegreater

overloadofthe

load

there

50 31 21

will be no

regulators.

than 16,000

power

supplies.

changeinaccuracy.

3.5K

2.1K

5.7K

5.0K

3.0K

2.0K

With a 16,000

ohms

to

Model738A

Sec.IIPage

I

J

OPERATING

2-1

INSTALLATION

No

special

the

Model 738A

used

the

in mounting, and

the blocked. Adequate be

maintained. Damagetothe becomes paragraph

THE

AIN

T

connecting

instrument, OFF

2-2

THIS INSTRUMENT INTO A 3 MEGOHM LOAD. SAFE SHORT OR TO

THE DAMAGE WILL RESULT. meter

The

Model 738Aisdesignedtoproduce voltages whicheverisgreater, megohms.Ifthe input voltages as

0.15% high.

brating

instructions

Voltmeter

either

cabinet

OUTPUT OF THIS INSTRUMENT MAY CON-

VOLTAGES WHICH ARE DANGEROUS. When

first.

EXTERNAL

LOAD

must

resistance,

in a

assures

providing

ventilating

instrument

clogged

4-3,

Cleaning

or

disconnecting

switch

IS

LOW

OUTPUT TERMINALS PERMANENT

also

have

that

are

accuratetowithin±0.1%or±5j.lv,

meter

between 20

For

an

11

megohm

are

rack

or

on a

adequate

the

air

holes

in

air

flow through

Inspect

and

CAUTION

the

LOAD

CAUTION

IS

1,000

RESISTANCE

such

and

the

can

air

flowisrestricted.

the

OUTPUT

DESIGNED TO

OHMS

Notethatanycalibrating

this

resistance.

with an

being

as

11

200

highest

instrument,

required Calibrator.

test

bench. A fan

ventilationineither

filter

is

the

right

the

air

filter

occurifthe

Air

Filter.

the

output of

SELECTOR

THE

PER

VOLT. IF A

IS

CONNECTED

external checked megohms,

volts

willbeas

accuracy

the

for

installing

It

can

kept

clean

side

are

filter

must

weekly.

filter

this

OPERATE

MINIMUM

calibrating

loadof3

hasahigher

the

output

much

when

cali-

OUTPUT

be

not

See

terminals

The

load

The the maximum

dedance

where,

With

to

usedtocalibrate sistance ditions be dicates brator external voltage.

2-3

A.

calibrated to A 10 rents

a

1%

error

lower

currents

All

develop

should be

lower

resistances

following

valueofshunt

some

less

INTRODUCTION

Ground

realize

microvolt

instruments

voltage

equation

accuracy

devices:

R

x

R

m

sacrifice

less

than 3

should

than 1,000

both the

for

PREVENTING

GROUND

between

error on

voltage

spurious

each

load

currents

and

the

in

the

fora1%

the

rated

signal,

the

on

0.3 ranges

signal

shunted

ranges

above3megohms.

may

resistance

when

Shunt

resistanceinmegohms

Input under

resistance

test

in

accuracy

instruments

megohms.

loadonthe

ohms

internal

output

the1millivolt

that voltages

voltage

decrease

ERRORS

CURRENTS

between

Model 738A

accuracyofthe

developed

two

instruments,

millivolt

you

leads.

operate

SECTION

II

INSTRUCTIONS

with 4.12

will not

be

usedtodetermine

necessarytoobtain

calibrating

3R

m

R - 3

m

(in

megohms).

havinganinput

OUTPUT

per

volt.

resistance

and

FROM

the

instrument

mustbeminimized

range

range.

must

minimize

fromapower

between

of

the

738A

Under

Table

the

in the

by

will

When

their

megohms.

change

high

instrument

may

no

con-

terminals

2-1

of

the

cali-

minimum

indicated

being

Calibrator.

ground

cur-

introduce

and a 3.3%

using

ground

chassis

with

im-

be

re-

in-

the

line

Sect. II

Page

2

Model 738A

OPERATING

CONTROLS

4 2

o

ill

III

VOLTMETER

MOO(,

11[W\.(T'

-.D.-oo

CALIBRATOR

~

NCKARO

C-ulOIlfo/lA

,_

o

,.

ftO

1.

2.

Select

to be

Select check select under

the

output voltage

calibrated.

for

use

meter

range

scale correspondingtometer

test.

requiredbythe

desired-To

tracking.

calibrate,

For

tracking,

meter

or

scale

Figure

5

to

6

3. Set

for

full-scale

4. Switch through accuracy

S.

Calibrate

6.

Calibrate

at

300 vdc output.

300 vac output.

the

each

reading.

entire

meter

rangetoobserve

calibration

point.

2-1

Model 738A

and

ground. development To

minimize

the

instrument

with

its maybeinsulated vide

the the

Grounding

tered,

merits, arrangement resistance the

instrument

738A

chassis

be

easily

an

adapter nectiononthe tail

lead

desired.

The

738Aisdesignedtominimize

of

such

signals

the

effectsofthese

being

calibrated

own

low-resistance

from

groundsothatitcannot

ground-return

paragraph.

arrangements

together

are

disconnected

and

with

comment

showninFigure

found

most

connectiontothe

being

calibrated

from

ground.

from

is

available

NEMA

maybeconnectedordisconnected

power

on

ground,

path.

most

2-2.

reliable

power-line

So

the

in which

plugisan

should be

See

on

that

power-line

its

own

currents

or

Figure

often their The

provides

and

insulates

the

ground

external

chassis.

further, grounded the

738A

pro-

2-2

and

encoun-

relative

grounding

a low-

ground

738A

may

ground,

con-

pig-

the

for the

as

UNDESIRABLE.

UNDER

---

TEST

o 0

ARE

CONDUCTED THROUGH

°d

MOST

GROUND

SEEKING CURRENTS

~

RELIABLE

CONNECTING

Sec. Il

~

FROM

METER

LEADSTOGROUND.

Page

3

UNDESIRABLE IF LARGE RF FIELDS ARE PRESENT AND INDUCED

C.

CHECKING FOR CURRENT-

currents:

1)

Connect brated. readingonvoltmeter.

2)

Remove

may

be

reading remain constant, sultsinthe ground connectiontothe

2-4

Check Cqlibrator

warmup

The

738A should week

.,

after

the

without

738A.

the

Set

the

or

add

and

again

with

and

constant.

use

the

lowest

current

STABILITY

and,ifnecessary,

before

remain

this

and

upon

checking

has

been

accurate

readjustment.

period

PRESENCE

-Tocheck

738Atothe

738A

ground

note

without

If

grounding

reading.

provideitwitha low-

power-line

AND

receipt.

accurately

see

for

effects

voltmeter

for1millivolt

connectionsasthe

voltmeter

ground

the

reading

arrangement

Find

ground.

WARMUP

calibrate

Allowatleast30minute

the

calibration.

setatthe

to within ± 0.1%

To

obtain

paragraph

OF UNWANTED

from

ground

tobecali-

output. Note

reading.

connections

does

the

sourceofthe

the

best

2-6,

should

not

remain

which

resistance

Model 738A

factory

for

over

accuracy

Calibrating

case

The

re-

and

a

CURRENTS FEED FROM ONE INSTRUMENT

),-~

__

~_O_Q;l

SATISFACTORY IF VOLTMETER IS WELL GROUNDED.

0

0 0 0

.~

SATISFACTORYIFCURRENT

CANNOT FEED BACK THROUGH CONNECTING LEADSTOGROUND.

Figure

2-2.

0

C:::-

FROM

Desirable ments chassis Calibration

for

:::::::::~

OTHER INSTRUMENTSINRACK

and

undesirable

grounding

when

using

Generator

§

~~

TO

THE OTHER.

0 0

arrange-

instrument

the

Voltmeter

Sect.IIPage

The

accuracy

The

1)

4

precision

accuracyofthe

2)

The

accuracy

The

3)

4)

The per After put ceeding

If

quate reached turning

amplitude

The

value

738A

reaches

week

after

this

warmup,

voltageisabout 0.1%

this

amount

the

738A

has

accuracy

after

only 2

on

and

accuracyofthe

2-5

OPERATING

To

use

the

738Atocalibrate

voltmeter,

Turn

1)

to

30

proceedasfollows:

on

the

minutes,

of

the

738A

with whichitis

calibrating

of

the

meter).

output

stabilityvstime.

of

the

external

its

maximum

about

the

30

minutes

normal

per

indicates

been

calibrated

for

most

average

minutes

off

does

not

output

voltage.

INSTRUCTIONS

738A

and

allow to

depending on

is

determined

calibrated

attenuators

load

stability

(0.1%).

resistance.

of 0.1%

warmup

driftofthedcout-

week. Any

subnormal

drift

operation.

within a week,

uses

(1%)

warmup.

noticeably

an

oscilloscope

Repeated

affect

warmupfor

accuracy

required.

by:

(the

time.

ex-

ade-

the

or

2)

Set

MULTIPLIER

3)

C.onnect the

by

two shield post. 2-3

and

4)

Set

the

desired

2-6

There ments: volt panel; on

the

rms

rear

is

must second, important rately Make cedure,asshown in

Figure

3

Figure Figure

the

FUNCTION

to

O.

voltmeter

plain

wires

connected

Observe

precautions

2-5.

the

MULTIPLIER

voltage.

CALIBRATING

are

three

output-voltage

the

300-volt

ac

output

and

the

300-volt

left

side

of

the

attenuator

be

set

correctly

and the

before

all

three

peak-to-peak

that

the

any

calibration

other

2-3. 2-4. 2-5.

switchtoCALIBRATE, and

inputtothe

orashielded

to

the

bottom

738A output

cable

OUTPUT binding

discussedinparagraphs

and RANGE

THE

738A

selectors

calibrating

dc output

adjustment,

peak-to-peak

the

adjustment,

electronics

section.

first,

the

ac

both on the

acadjustment chassis Thedcvoltage

rms

VOltage

300-voltdcoutput be

adjustments

the

following

Calibration Calibration Calibration

are

in one

Figures:

I II 1II

Model738A

with the

for

adjust-

the

300-

front

just

to

ac

voltage

last.Itis

set

accu-

attempted.

pro-

Model 738A

Sect.IIPage

5

CALIBRATION

o

I

o

RO

1.

Connect a 3OO-volt

standard

or

OUTPUT

2. Set the

quality, having an

better

and tenninals

controls

meter

appropriate

of the 738A

on the 738A

of

calibration

accuracy

of 0.1%

resolution,tothe

as

shown.

as

shown.

Figure

3.

Turn 30

minutes.

4.Ifnecessary, cessible to

obtain exactly 300 volts. Disconnect

standard

2-3

on 738A and allow to

adjust

potentiometer

through the panel hole meter.

wann

marked

up

R63,

for

ac-

OC,

the

Sect.IIPage

6

Model738A

CALIBRATION

o

II

o

RO

This shown in TION

1.

procedure

I,

With

the

preceding

has

been

OUTPUT

eitheranelectrostatic

300-volt

accuracy

ac-dc

to

738Aasshown.

assumes

that

illustration,

perfonned.

SELECTOR

on OFF,

or

thermocouple

meterofcalibration

the

OUTPUT

terminals

the

procedure

CALIBRA-

connect

type

standard

of

the

Figure

2. Switch

3.

4.

2-4

DC-

and

the

readings.

Set

the

If

necessary, accessible ed

AC, to

step

in

2.

the

OUTPUT

DC+

and

OUTPUT

adjust

through

obtain

SELECTOR

note

the

midpoint

SELECTOR

potentiometer

the

front

the

midpoint

to400'"RMS.

panel

hole

reading

between between

R40,

mark-

noted

Model 738A

v

Sect,IIPage

7

0

W=

0

~

7

-

.~~TOI

. .

@J @J

CALIBRATION

III

4

o

r!iJ

400H

o

00

·J

This

procedure shown in BRATION I performed.

1.

Switch

2. Connect

the

3.

Set

On

4. the

the

and

tfiI;

Model 400Htothe

the

738A OUTPUT SELECTOR

controlsasfollows: RANGE MULTIPLIER

OUTPUT SELECTOR

FUNCTION

the400H

meter

switchto1

reads

assumes

preceding

CALIBRATION II,

738Atothe

switchto100

switchtoCALIBRATE

adjust.00lV-40OCPS

exactly

that

illustrations,

100-volt

400Hasshown, with

to

400'"RMS

100.

the

procedure

has

settoOFF.

control

This

control

CALI-

been

range.

until

Figure

mounted on from

5. While 100 the pointer

6.

Set PTP

7.

The

necessary

meter

the

8.

Repeat

zero-set

is

calibrate

2-5

on a

bracket

the

left

side

the

from.

volts

remain

mechanical

indicates

the

738A OUTPUT SELECTORto400

and

the

400H

Calibrator

attenuator

step

until

the

meter

RANGE

should

adjust

section).

5, but

the

400H.

near

the

of

the

chassis,

across

zero

exactly94volts.

switchto3.

now

read R67 (on chassis

turn

the

meter

the400H,

until

100

left

justtothe

mechanical

indicates

from

panel

as

viewed

turn

the

meter

'"

exactly.

sideofVolt-

100 to

rear

meter

If

of

re-

4DO~

RC VIaV2

S2A

0000

RECTIFIER

FIXED

IBOT.

VI4

OSC

SECT.I[;."\

I

OUTPUT

SELECTOR

I--

\

r.7 "

\

1\

SERIES

REGULATOR

VI3

DIFFERENCE

AMPLIFIER

VIIaVI2

REFERENCE

TUBE

VIO

LEVEL

CONTROL

AMPLIFIER

V3

\

AGC

\

-4TO-6.5V

\

400-

I--

VGtTAGE

CRI

BAND PASS

FILTER

...fi..D..

/I

\

I

l~

-~.~~

R67

PEAKTOPEAK

AC

~-ts9

__-__

S2A

(TOP

I--

20DB

PRE-AMPLIFIER INVERTER

V9

AGC

AMPLIFIER

ADJUST

SECT.)

I--

V4

J:l...[}

I--

~

66

~~https://manualmachine.com/I~

S2B

(BOT.

SECT}/

I I

/

I

/

J/

PHASE

v5

VB

AGC

DIODE

C~6

..

I-

I

--

'=

FEEDBACK

~

fg)

V6

POWER

AMPLIFIER

V7

R40

~

I-

IJC

"

ltjf,

______

"7

~

en

(1)

n

....

......

I-

OG

'1:l

Il>

(1)

o

c~ c~

ri

~

I

I I

I

1 I

I.

I

J

I

MULTIPLIER I

I

§J

GJ

I

IE]

: !

ITRACKING I

NOTE:

ATTENVATOfi

FOR

ATTENtJATOF; SCHEMATIC.

IFUNCTION I

'-'

lETAIU

!OUTPUT!

~

tl

10"'

'E

'""

'0'

t

Figure

3-1.

Block

Diagram

•

Model738A

~

8-

(1)

......

'-I

CJ.)

00

Model 738 A

Sect.

III

Page

I

..

3-1

INTRODUCTION

The

Model 738A

the

major

gram

generatorisexplained

circuits

The

300 volt working

the

circuits

the

300

of

all

almost

tube supply.

adjusted

sible

circuit

in

Figure

are

regulated

voltsdcprimarily

calibrating

entirely

which

The

potentiometer

through the

Voltmeter

sections

3-1.

explainedingreater

dc

power

standard

in

theacgenerator.

voltages.

by

the

suppliesareference

300vdcisadjustable

front

Calibrator

shown in

The

overall

first,

then

supply

and dc

determines

Stabilityisdetermined

gaseous

R63,

panel.

the

operation certain detail.

provides

powertomost

The

voltage

by a

screwdriver-

marked

consists

block

important

both

accuracy

the

accuracy

reference

for

DC,

acces-

dia-

of the

the

of of

dc

of

THEORY

3-2

The former electronic gulator reference which two-stage plified tube.

If

this and against amplifies appliesitto

If

through act

DC

GENERATOR

dc

power and

tube which

the

difference

The

the

300 volt output changeiscoupledtodifference V12.

the

300

V13 will

the

tendencyofthe

supply

rectifier

regulator

tube

providingastable

300

voltsiscontinuously

difference

voltage

This

outputof

and

inverts

the

volts

level

consists which consisting

acts

amplifier voltagetothe regulating

tendstochange, a

amplifier

the

Voltage

the

gridofSeries

tendstodecrease,

increase

output voltagetodecrease.

SECTION

OF

asavariable

and will

OPERATION

SECTION

of a

power

supply

compares

difference

voltages

of a

series

resistor,

voltage

compared,

applying

series

processisas

amplifier

the

Reference

voltage

Regulator

the

instantly

trans-

for

against

and

an

regulator

follows:

portion

change

tube VIO,

Tube

V13.

current

counter-

III

an

re-

a

am-

of

VII

and

Fordcmeter supplyisconnected TOR

switch

FUNCTION

The

internal

of

the

output point of ages

are

the

floating dc grounded the

positive

required.

For

ac

LECTOR generatortothe of

theacvoltage

loadisalso

and

peak-to-peak

ing

within

calibration,

S2, to

switch

impedanceofthedcgenerator

attenuator

overload.

obtainedbyreversing

only

after

or

negative

voltmeter

switch

theacgenerator

connects

attenuator.

generator

nearly

the

output of

through the

the

attenuator

S102,tothe

is

Negative

power

voltagesisdeterminedbyswitch-

supply.

the

switching

lead

calibration,

0 ohm.

OUTPUT

nearly

and

the

can

the

output

The

internal

uptothe

The

generationofrms

andisdescribed

the

300

volt

SELEC-

and

through

terminals.

0 ohm uptothe

positivedcvolt-

output

The

supply

so

that

be

grounded

OUTPUT

from

impedance

point of

ahead

leads

either

the

over-

later.

the

as

SE-

ac

A

difference the insensitive supply sioninparticular). amplifierisas

of

Tube

is

thedcoutput with Reference plished gridofVIlA of Voltage appliedtothe currentinVllA common will will out of to

the

type of

degenerative

to

voltages

Vll,

the

Tube

by applying a

whichisnormally

Reference

gridofVllA

cathode

decrease.

have

changedbyequal phase. grids

The

of VI2A& B whichisanother

amplifier

feedback

changes

(heater

The

follows:

input

stage,

the

constant

VIO.

portionofthe

Tube

will

increase,

resistor,

The

plate

platesofVII

is

usedtoamplify

becauseitis in tube voltages

The

characteristics

and

cathode

operationofthe

comparesasample

voltage

comparisonisaccom-

from

+300 vdc

equaltothe

VlO.

Assume

tends

togo

positive,

and

duetothe

the

current

voltagesofVIlA

amounts

and will be 180

are

direct-coupled

relatively

and

emis-

difference

Voltage

to

the

output

the

voltage

the

large

in

VllB

and

difference

of

B

0

Sect.

III

Page

2

amplifier

just polarity the

plateofVI2B.

3-3

Theacvoltage rc

oscillator

a

filter,apre-amplifier,

an

automatic lator signal resonant follows. to

Level kept variable-mu

Control introducedbythe The feedback

The bothtothe to

the control cuit followed by Reference voltage. this andisthen for

Level amplifier output

whose

described.

for

AC

The

Series

GENERATOR

generator

followed by a

gain

generates

whose

frequency

The

signal

Control

constant

by

control

Tube

is

variable-mu

signal

is

then

stabilized

signal

from

the

function

output

consists

circuit.

attenuator,

The

of

amplifier

Clipping

Any

portionoftheacwave

voltageispassed

rectified

Control

and

output

level

would not held down by of

V3.

Consequently,

put

level

to

decrease

be

corrected always the

Reference

level

tendstorise,

ac

which, when

trying

automatically, to

maintain

Clipping

rectified,

operation

control

Regulator

is

similar

voltageofthe

Vl3isobtained

SECTION

consistsofa

level

an

output control a highly

Tube

application

filtered

of

from

grid.

(AGC)

is

the

V3.

circuit.

stable,

adjusted

400-cycle

oscillatorisapplied

The

output

of

AGC

The

outputofthe

to

remove

grid

amplified

output

selector

and

fed

amplifier,

amplifierisconnected

for

further

andtothe

automatic

Reference

V9

and

gain

Clipping

rectifier

Diodeisbiasedbyan

by the

diodetoamplifier

by CR1toproduce

Tube

V3.

The

gainofthe

amplifierissuch

always

the

AGC

the

any

tendency

(due to

Diode

diode

tend

bias

appliedtothe

loading,

as

the

level

bias.

passes

to

amplifier

develops

to

the desired

from

conventional

control

tube,

amplifier

The

oscil-

lOW-distortion

to

the

exact

filter

which

from

V3

biastoits

level

harmonics

characteristic.

through

V5,

V6and

application

automatic

control

gain cir-

Diode, V8,

CR1.

The

exact

thatisabove

AGC

bias

pre-

that

the

rise

were

grid

for

theacout-

etc)

would V9

established

If

the

output

moreofthe

more

bias.

one

and

is

the

V7.

dc

V9

ac

is

by

it

The

increaseinbias

fier

and

holds diode the is

To turned to the made tiometer the also the with a ment result

The

or switch

automatically

two

constant

produce

+300

cathode

intoavoltage

same

reduces

desired

small

avoids

with

3-4

OUTPUT

ac

diodes

through

volts.

R67toground

time

OUTPUT

output to

selects MULTIPLIER or

from

the1or3volt

with

rms

return

the

reductioninoutput

increase

the

SELECTOR

(S103)

reduces

the

output

divides

so

that

varying

voltages,

series

To

produce

resistors

OUTPUT levelofthe

increaseindistortion

greater

ATTENUATOR

the

attenuator

the

output

and

(SlO1) SWitch.

The

attenuator

each

dividerisreturnedtoground, divider vious are The from selects voltage

is

divider,

1/10

MUL

TIP

oneofthese

the

divider

consists

connectedtothe

each

divider

the

voltage

LIER

switch

dividers.

output

from

selected

switch.

The

tracking

propriate

0.1

volt

vides

0.5 attenuators parallel sistors

voltages

attenuator

divisions

volt

divisions

are

combination

that

are

taps.

from0to

simple,

very

stable.

the

gainofthe

constant.

the

current

the

bias

on the

signal

resistors

levels.

the

cathodeofV8isre-

R67, R68

peak-to-peak

R67, R68

divider

by

through

returning R66

SELECTOR

400'\,

inputto

voltageisobtained

in

AGC

bias.

grid

bias.

connects

The

voltage

either

RANGE (S104)

positionsofthe

of five

voltage

each

lowest

produces

from

the

divider

selects

the

The

oneofthe

by

are

obtained

One

five

the

position

1 volt,

from0to3volts.

uncompensated

of

precision

Model 738A

ampli-

The

second

between

signal

and

voltages

and

R69

poten-

and

S2A. At

switch

V3.

This

arrange-

which would

either

the

FUNCTION

from

switches,

TRACKING

dividers,

subsequent

taponthe

voltages

before

output

voltage

RANGE

switch

tapsonthe

MUL

TIPLIER

from

the

provides

the

other

series

wirewound

diode

R69

are

S2

Thus

dc

the

pre-

that

it.

ap-

pro-

The

and

re-

Model 738A

Sect.

IV

Page

1

4-1

This ment shooting To cludedatthe procedure localizing

the on assemblies Hewlett-Packard

4-2

The TubesV8and teristics voltages. erator; put the thercoscillator quency. frequency justedtothe

inputtopreamplifier

replaced

output servicing.

INTRODUCTION

section

and

facilitate

useoftest the

TUBE REPLACEMENT

738A

voltages

dc

contains

for

adjusting,

the Model 738A

service,

endofthe

gives

a fault to a

schematic

does

directly

Tube

V8

affects

voltages.

After shouldbechecked

without

voltages

a quick

points.

shouldberemoved

Company

not

VIa

are affect

VlO

only

and

canbereplaced

may tube

center

adjustment.

should be

instructions

calibrating,

Voltmeter

location

section.Atrouble small

These

diagram.

require

the

affects

the

Replacement

causeaminor

replacement,

frequencyofthe

V4.

illustrations

systematic

circuit

test

Damaged

and

for

repair.

specially

onlytubes whose

the

accuracyofthe

all

voltagesinthe

accuracyoftheacout-

and,ifnecessary,

The

checked

for

tube

replace-

and

trouble

Calibrator.

are

shooting

method

area

through

points

of a tube within

other

are

shown

attenuator

returned

selected

without affecting

changeinfrethe

accuracyofthe

tubes.

charac-

output

oscillator

filteratthe

tubes

can

after

in-

to the

gen-

ad-

be

any

by

Research

at

hardware

ing and

4-4

of

Itisimportant output be filter function of which follows distortion and of thercoscillator resonant frequencyisadjusted the way to resonant maximum by a Model4l0B.

In

the and input and output

requires

l50A

Proceedasfollows:

air-conditioning

ADJUSTING

AC

in

maximum

bottom

set

dc

the

more

oscillatoristunedsothat

therefore

with a Model 152 Dual Channel

MAINTENANCE

Products

stores

OUTPUT

that

the

sameasthe

order

frequency

frequencyofthe

vacuum-tube

an

to obtain

the

high-Q 400

Level

introduced

signal-to-noise

compartment.Asimple

the

oscillator

dc

voltageattest

exact

there

signals.

oscilloscope,

Corp.

and

other

stores

supplies.

THE FREQUENCY OF THE

the

frequencyofthe

resonant

proper

cycle

Control

by V3.

output

of

tuning

is

TubeV3istoremove

mustbethe

the

filter.

by

capacitor

output

filteristo

pointD,as

voltmeter,

procedure

no

phase

The

such

SECTION

This

oilisavailable

carrying

oscillator

frequency operation. filter

(LI,

For

maximum

ratio,

the

frequency

sameasthe

The

oscillator

C3,

located

and

satisfactory

frequencytothe

adjustC3for

measured

such

as

given below,

the

filterisresistive

shift

between the

follOWing

as

procedure

the

t[ij;

Amplifier.

IV

heat-

of the

The

CIa)

output

in

the

I/i$

Model

4-3

This nation for

asitappears

instrument pulling element, recoat

A

CLEANING

instrument

for

the

fan tobeeffective.

it

washinwarm

with

suitable

THE

containsafan-air

cooling.

dirty.Itis

cabinet

out

special

coating

and

of

its

oilisR-P

oil

AIR

FILTER

The

filter

mustbekept

Clean

locatedatthe

mayberemoved

holder.

water

available

To

and

Filter

filter

the

filterassoon

rearofthe

simply clean detergent;

for

this

Coat

combi-

clean

the

filter

purpose

#3,

made

by

then

1) Remove the turn

on, and allow a

2) Connect one

other

vertical

the

oscilloscope loscope avoid oscillatororfilter.

connections

shifting

metal

vertical

input to

externally

the

dust

five-minute

input to

test

are

madeatthese

resonant

cover

from

frequencyofeither

point

test

from

the 738A,

warmup.

test

point B,

E.

Synchronize

pointF.Oscil-

points to

the

Sect.

IV

Page

3)

Adjust

impose Adjust amplitudeofthe

4)

If

traces, the

two

is

now filter, achieved.

the

horizontal

the

vertical

necessary,

Le.toreduce

signalstozero.

at

the

and

best

2

vertical

two

peakofthe

stability

position

centerlinesofthe

sensitivity

traces.

adjust

the

C3 to

phase

The

oscillator

resonance

and

greatest

control

two

to

equalize

superimpose

difference

curveofthe

output

to

super-

traces.

the

between

frequency

are

is

designedtowork

ohms

To

or

apply

and will not

pedance

meter

voltages the

meters

prevent

a

meterisdifferent

damage

which

differential-type

except

the

correction

into

read

(see

paragraph

to

hasatleast

the

300

Model 738A

an

impedanceof3

accurately

the

attenuator,

1000

voltmeter

volts.Ifthe

from3megohmsbesure

as

given in

with

2-2).

ohms/volt

to

impedance

paragraph

other

useavolt-

impedance

measure

meg-

im-

all

of to

2-2.

4-5

To brator, factorily OUTPUT the schematic correct, ly,

A.

1) toapower

2) switchestomaximum

3) With lutionofat voltageatthe voltage remain the V12 of 300 volt mately is

TESTING

THE

test

or first

by

terminals.

key

voltages

diagram.

assume

and

proceedtothe

OC

CHECKS

Connect

Set

range,

the

too

the

the OUTPUT SELECTORtoOC+,

an

from

constant.

check

and

Vll,

regulator.

bus.

0.8

high,

AND

CALIBRATION

trouble

determine

measuring

at

the

738A

source,

electronic least

± 0.1%

OUTPUT

103to127

V14

then

The millivolts check

Vll,

TROUBLE

GENERATOR

shoot

the

738A

if

it

is

its

output

To

locateafailure,

the

test

points

When a

circuittobe

tumonand

clockwise

voltmeter,

Ifitvaries

for

check

Check

ripple

peak-to-peak.

V12

measured

step.

at

300 vdc,

terminals.

volts.

The

over

low output;

for

ripple

level

shouldbeapproxi-

and

C29.

allowtowarm

positions.

excessive

SHOOTING

Voltmeter

operating

voltages

shown on

operating

transformer

havingareso-

measure

Vary

VOltage should

all

voltage

If

measure

VOltage

all

or

check

the

Calisatisat

proper-

other

the

part

loading

on

ripple

the

up.

the

line

V13,

the

Switch

through brated dc incorrect,

6) positionstodetermineifallofthe put

is

correct, rect,

The satisfactory circuit

B.

1)

2) With a

voltageattest adjust

of

low and

then

too high V7, termines

the

output

is

correct,

Switch

voltages

the

above

failure.

AC

Set

the

to

other

V8

and

MULTIPLIER

their

positionstodetermineifall voltages

but

anyoneofthe

the

attenuator

the

FUNCTION

are

correct.

but

anyoneofthe

attenuator

steps

and,ifnot, which

CHECKS

OUTPUTto400", RMS.

precision

obtain

cannot

tubesinthe

and

the

bias

sectionisdefective.

should

point

F.Ifitistoo highortoo low,

the

be

adjusted

cannot

voltage-divider

for

and RANGE

are

correct.Ifthe

section

switchtothe

If

the

lower

voltagesisincor-

indicateifoperation

section

voltmeter

correct

amplifier.

be

adjusted

V8.

measure

voltage.

up,

check

circuit

lower

is

calibrated 300

If

the

down,

selectors

the

cali-

300

volts

voltages

defective.

TRACKING

out-

voltsdcis

contains

the

signal

If

itistoo

V6

and

V7,

voltage

check

which

V6,

de-

is

a

..

is

4) Switch RMS

position

as

in

the

voltmeters.

5)Ifthe with a low 300 may the lose

dc

volts

be

damaged.

precision

their

the

OUTPUT

and

preceding

output of impedance

(straight

resistors

accuracy.

check

paragraph.

through)

If too

SELECTORtothe

the

line

voltage

Disconnect

the

attenuator

voltmeter

much

may

In addition

on

range,

the

currentisdrawn

be

overheated

this

400

regulation

is

measured

any

but

attenuator

instrument

the

and

3) With a high

'"

such

cycle

The

25 reduced,

low

It

check (0.1%). distortion.

impedanceacelectronic

as

the

IJ$

Model

voltageatpOint C

voltageatpoint C

volts.

and

may

If

itisexcessively

replace

cannot

alsobedesirabletocheck

point C which

If

lamp

be

raised,

shouldbeat

necessary,

400D/H/L

in

the

should

RTI.

check

select

voltmeter,

measure

oscillator

be

between20and

high and

If

itisexcessively

RTl,

the

least60db

tubes

cannot

VI

and

distortion

to

the

400

circuit.

V2.

down

reduce

be

at

Model738A

Sect.

IV

Page

3

5) With a

dc

electronic Model 410B Vacuum bias

voltageattest

-4

and

-6.5

volts.

the

amplifier

is

low.

6)

Measure

test

point

V6

andV7andifthe

distortioninthe

about

since

0.15%. it

F.

will

tubes

the

distortionatthe

If

good

output should be

The

affect

driftintheaclevel.

When

measuring

the

330B with contains need you in

the

out

appreciable

balancing.

are

not

unit.

the

leadsofthe pieceofwire 60", hum on there tubes Now toroid of wire. wire the hum rotate

is

etc.

place

to

the

toroid

Make

possible.

toroid

pickup.

for

hum in

Then

junction of C9

coil.

observing

the

minimum

the

distortion,

an

However,

just

introducing

To

determineifthe

possible.

the

remove

short

is

this

This Now

To

hum.

voltmeter,

Tube

Voltmeter,

point

D:itshould

If too low,

V3, V4, V5,

tubes

output

tubes

distortion

the

AGC

oscilloscope.

60", hum

when doing

toroid

coilLlwith

Noteifthe

screen

the

of

unit

removeitby

ths

from

short the

and

the

lead

short

with

will

remove

rotate

hum,

The

the

and

hum

suchasthe

the

gain

V6

output

are

used

are

balanced,

reducedtobelow

must

voltage

monitor

If

the

toroid

humtobuck

unit

has

output

the

oscilloscope.

across

ground

R18.

The

that

goestothe

the

shortest

all

hum

toroid

for

coil

loosen

tighten while

should

measure

be between

on one of

and/or

terminals,

for

V4, V5,

be

kept low

and

cause

the

output of

distortion

coil

may

thisbesure

out

hum

hum,

short

the

shortest contains

replacing

the

toroid.

sideofthe

ground

side

black

piece

ahead

minimum

the

nut,

still

be down to

t$

the

V7

the

of of

a

If

about 0.03%.

up,

replace

removed

cover

tween

and

the

Remove

V3. If

be

suretoretain

the

coil.

cover

and

the

operation.

4-6

Accuracy accuracy the methods tiometers, used. only one voltmeter. will maximum a

There ments: volts panel; on be peak-to-peak the other

Make cedure the

METHODS

of

this

instrument

of

the

standard

frequencyofcalibration.

involving

and

The

extra

depend

standard

precision

method

pieceofequipment

The

accuracy

upon

the

accuracy

less

accurate

are

rms

and

the

instrument

set

the

first,

meter

three

output

300-voltdcoutput

ac

output

the

300-volt

the

ac

voltage

300-voltdcoutputbeset

adjustments

all

three

as

738A,

and

describedinparagraph

are

calibration

Figures

the

short.Ifthe

coverofthe

the

There

the

caseofthis

OF

CALIBRATION

used

voltage

described

accuracy

of

the

maybeused.

voltage

adjustment,

peak-to-peak

chassis.

rms

ac

voltage

last.Itis

attempted.

adjustmentsinone

2-3, 2-4,

toroid

washer

mustbean

coil

will

depend

for

calibration

Standards

cells,

precision

dividers

involves

--a

of

the

standardization

of

this

738Aisnot

calibrating

adjustment,

both on

acadjustment

The

dc

second

important

accurately

2-6,

and

2-5.

hum

comes

must

between

air

gap

for

proper

upon

laboratory

poten-

may

the

use

precision

meter. necessary

adjust-

the

voltage

and

before

Calibrating

be

the

be-

the

and

be of

If

300-

front

must

the

that

any

pro-

Sect.

IV

Page

4

Model 738A

JIOI

RIOI

3000

Rl02

2980

Rl03~

3000'

R104

3010

RI05

3006

RI06

1202

RI07

601

RI08

601

Rl09

300

RIIO

120

Rill

200

I TRACKING I

SIOI

JOO v

200V

-<5

~

l-.ol1l

m

NOTES:

UNLOADED 8ETWEEN 10V VOLTMETER LOADING.

ALL RESISTORS

r------~------~---

OJ

i

SI04F

.$104E

(XIOOI

(XIO)

I

100V

~

[})

;::

50V

pi

JOV

~

20V

~

10V

~

5V

~

JV

.(")

1

~

0,

:::lTIJ

10:

~r;-;;'I=O~-----'

I

~~

SIOIA

~[J]

'-"0'==------,

S

1018

:::rn

0=:=-----,

~Q]

ATTENUATOR OUTPUTISAPPROX. 0.15"1.

AND

200VTOCOMPENSATE

! 0.1 %

951041

RANGE I

J.OV

RII2

300

2.5V

___

-,",

2.0V

1.5V

I.OV

.9V

.8V

.TV

It"-

.5V

RII3

300

RII4

300

RII5

300

RII6

60

RII7

60

RII8

60

RII9

60

RI20

60

RI21

60

----.J

SI04

rO

~

RI22

60

.JV

RI23

200

.".

(XI)

Co,nIGHT

FOR

3MEG.

HIGH

------1

I

19~8

IV

HfWLm

'''CK

....D

d

oth.rwi,.

conNn'

COM,"NY

~tMp·

or

of

.h.

This

drawln,I,Intended for the op.ratlon

and

Moint.nonce of H....l.tt.'ockord

"'en' oncli.not to1Mu

reproduced without writte"

~:.,:I~~;.'T~~~J&.

••

COMpany.

:>1030-,

I

MULTIPLIERII

I

I I

I

~

I

~

I

---0

I

~

I

'---<-~)oo-""'I

>----0 >----0

0

SI038

I

>----0: >----0

I

.JV

~

I

,------,::::::cf+-'-QISI03A

RI24

600

RI25

600

D

RI26

300

.2V

.IV.A.L

.05V

~

~I

I

ISI04C

(X.II

I

[jQQ]

I

IiQJ

I

[]]~

I

[Ie::

I

[]II~

05102

1

FUNCTION

I

[ill]

---0;

JI02

[]

IC:"

JI

,....,

Figure

4-1.

.JV

.2V

•

(V

Attenuator

CMY'lIGKT

T~

4f

••4....,....

•••t••

f.",.4",(.1II

...w....

r--

•

R2

1.3,M

• R I

1,31M 0

FAN

-e-

FI

I2EJ

51

~

'!

I'""Ht:WllTf·'

••

i

••••

1.,.fWlIe>4

f.,",

-e

••

f H

••

I."".c\.,4

4 I,

It.'

,.

r.."'.....

_,~

WflU••(

·'.(II.

....

IIIC••

,...,

RES, CAP

R3<

2200<

<

R4

....

3'0

~

::::=:C2

---:

253

~C3

~~F7-45

_-lILk

MO-IIL

2*

IU<

11/5¥

5!

m.

.....

...

CI(

....D COM'......y

••

'.f.'i

...

.q~p

'h

••w,"-

....

•••••

'.1

,h•

."..

• "OO'C

TUNED

R5 lOOK

~~:;.:Z~IO:....+-_..,

+

300

---

......

VOC

---------------1>-----

OSCILLATOR-

>R6

)ID

82K

.I~~:::r:

RII

7.5K

..

~.,~!lO__..,I~I'"F-_f

rH.@J~=--

;70A~lJ"---·~I\:='l'

R7

330

+5

VI4

5U:4GB

k--..--

---'

051

R~~

~

<

3~

>V13

4,5

•

I V 2

~R'

270

0000

.......-......

I~~~

>

.--

R51

lOOK>

·47

VB

V,

2

7 1

6CL6I;

(BOT,

::::::;

-:

VI

6AU6

~RTI

~'ow

TI

R£D

I

~£L

R[O

11

......;.;:.;;..-+-_---"

y£L

yQ.

11

......

....:.='-+

I

~

I }

GIlW

33K

R8 220K

~6

4,5 4,5

?V12

?VII

. .

4

3

?VI

?V2

5

4

.

~,

C5

V 3

6BJ6/GBAG

~:~~~

>,g&

~5~3

~~~~

R 14

52A

150

SECTl

?

~~~C

C27"'C 60llF

r-----

R52

>

90K

+4«JVDC

R57

510K

VI2

f2AX?

DIFFERENCE

.......

~~

-----'-...;..:,;'----'------<

LEVEL

CONTROL

TUBE

r4.~

~

-4

.......

------'---

> R 17

200K

RI8

~K

..

fllO

RI9 200K

~CII

;;;;;;~::::

1;6IIF

MH

TO

-6.5

VOC

Ace

VOLTAGE

~047

BlACk

SERIES

REGULATOR 4.7M

VI3

GAV5GA

...

~---..--~~--;~8gU~r:;cUT

R

55

82~:7S

> ,

5

==='

...--,

R~

TRANSFORMER I

IK

2008

PREAMPLIFIER

......

----

R22 82K

CI2

H~

~2:J5

~

_

.....

---

Z

~

3 n.'

It

>

R20 2200

IJ.F

~

! (REG.l

V4

12AX?

~---

+300VOC

R24 220K

~

..:::::::;:

R48

VO

LTAGE

......

----------<t----

R23

.

82K

~'.16

C~::::

.Ij.f'

.

+/,.

R21

1500

+300

VOC

.0i;F~m

PHASE INVERTER

{§l

(8~

R70

z

47K

~.

--~

I'"'""

~,I

~

• OI),lF >

R47

lOOK'

{'j~

~

-=-_,,=-

~-~

CRI

+

+l.

7

r:--

":>R44 ":>2200

1

AMPLIFIER

......

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

CI6

V5

~2AU?

~2K6

(24•150K

~~

,....---,)21

---;-8

R45

<'20K

.01}lF

~'::'2O

~

:::

•

--

I~

---

•

HI>

CI7

CI5

0022}lF

AGC

>R42

I

C';3

022IJ.F

12K •

ER

~~

C32

~~-y

4

AGC

'!H:

r~K

R46

AMP~;

12AX?

, I

R43

•

2200

CLIPPING

--t--....;3+--t---~---<!....---..:......--+--+---t_----.._-------+_-....------

FIER

R58 SlOK

:::~C2'

F

.511

•

>lOOK

R62 245K

R63 10K

R64

R68

•

lOOK.

R72 15K

R67

10K •

R66 lOOK

PEAK-lO-PEAK

A.C

Il>

>

AOJ.

8 I 6 A

AMPLI

POWER

AMPLIFIERS

R37

R36

lOOK

100~

C22

390

V8

GAL5

~

5 J

I,

I J

I~

r.

REFERENCEl

DIODE

T3

1

~

!11r=C20?~

,

.II~

+480

I

FROM

V

14

R3'

•

175.8K

1

[g]

~.

R40 25K

R41 468K

BUICk

[2

--,

Model 738A

Sect.VPage

1

'.

5-1

INTRODUCTION

This replacement Calibrator.

Table orderoftheir fonnation instrument designator designators initial cludedatthe includes

2)

3)

see

4) S)

6) tenance

section

parts

S-1lists

on a

is

applyingtothe

designator.

the

following:

1)

Reference Full

descriptionofthe

Manufacturer

listofmanufacturers

Hewlett-Packard

Total

quantity

Recommended

during

contains

for

replaceable

reference

part

used

listed

end of

designator.

one

opposite

Miscellarieous

the

of

the

stock

usedinthe

spare

yearofisolated

infonnation

the

Model 738A

partsinalpha-numerical

designators.

more part.

same

list.

Detailed

part.

partina

in appendix.

number.

instrument

quantity

than

the

Other

part

five-digit

for

service

for

ordering

Voltmeter

Detailed

onceinthe

first

reference reference

refertothe

parts

infonnation

(TQ

complete

(RS col).

are

code;

main-

in-

col).

REPLACEABLE

5-2

To quiry sales

or,inWestern

Specify

1) Model and

2)

3)

4)

To

plete

and

ORDERING

orderareplacement

either

representative

Hewlett.Packard

Circuit

Description. orderapart

descriptionofthe

location.

to

CUSTOMER SERVICE Hewlett-Packard 39S

Page

Palo

Alto,

Hewlett-Packard Rue du Vieux Geneva,

the

follOWing

complete

reference

INFORMATION

your

authorized

or

to

Mill Road

California

Europe,

Switzerland

not

to

Billard

infonnation

serial

stock

designator.

listedintable

part

SECTION

PARTS

part,

address

Company

S. A.

No. 1

numberofinstrument.

number.

andinclude

orderorin-

Hewlett-Packard

for

each

S-1, give a

its

function

V

part:

com-

Ckt Ref

B1 Cl

C2

C3

C4

C5

C6

00202-2

Motor: fan

Capacitor:

270 pf ±

Capacitor:

253 pf ±

Capacitor:

7-45

pf, 500 vdcw

Capacitor:

.1

pi

Capacitor:

1pi±

Capacitor:

1500 pf ±

Description

fixed,

fixed, 2%,

variable,

fixed,

±20%, 600 vdcw

fixed,

10%,

fixed,

10%,

600 vdcw

10%,

mica,

500 vdcw

mica,

300 vdcw

ceramic,

mylar,

paper,

paper, 600 vdcw

Table

5-1.

Replaceable

Mfr

28480 00853

76433

72982

09134

24466

56289

Parts

~Stock

3140-0010

0140-0015

0140-0108

0130-0001

0170-0022 2

0160-0079

0160-0012

No.

TQ

1 1 1

1 1

2 1

1 1

RS

1

Sect.VPage

2 Model 738A

Ckt

Ref

C7

C8

C9

CI0 C11 C12,

C14 C15

C16,

13

17

Capacitor:

.22

JJ,f±10%,

Capacitor:

±

· 1

JJ,f

Capacitor:

.051

JJ,f±5%, SameasC5 SameasC8 Capacitor:

· 022

JJ,f±10%, SameasC4 Capacitor:

.0022

JJ,f±10%,

Capacitor:

.01

JJ,f

Table

5-1.

Description

fixed,

mylar,

200 vdcw

fixed,

5%,

fixed,

mylar,

200 vdcw

paper,

600 vdcw

fixed,

mylar,

400 vdcw

fixed,

paper,

600 vdcw

fixed,

± 10%, 600 vdcw

paper,

Replaceable

Parts

Mfr

56289

84411

(Cont'd)

*

~Stock

No.

0170-0038 1 1

0170-0019 2 1

56289 0160-0021 1

84411

56289

0170-0005 4 1

0160-0007 1 1

0160-0002

TQ*

3

RS*

1

C18,

19

C20

C21 C22

C23 C24

C25 C26,27

C28 C29

Capacitor:

50

JJ,f

-10% + 200%, 50 vdcw

Capacitor:

.01

JJ,f±10%,

assigned

Not Capacitor:

390 pf

±

SameasC12 Capacitor:

.0018

JJ,f±2%, SameasC12 Capacitor:

JJ,f/sect.,

20 SameasC16 Capacitor:

· 5

JJ,f±10%,

fixed,

fixed, 2%,

fixed,

electrolytic,

paper,

1600 vdcw

mica,

500 vdcw

mylar,

600 vdcw

electrolytic,

450 vdcw

paper,

400 vdcw

4

sect.

37942

00656

76433

0180-0029 2

0160-0023 1 1

0140-0114 1 1

09134 0170-0035

56289 0180-0025 2

14655

0160-0024 1

1

1 1

1

* See

introductiontothis

section

00202-2

Model 738A

Sect.VPage

3

Ckt Ref

C30

C31

C32

CR1

DS1

F1

J1

Capacitor:

.015

¢ ±

Not

assigned

sameasC3

Diode,

Lamp,

Fuse,

Binding

silicon: 3ES2

incandescent:

cartridge:4amp,

125V

for

125V

for

Post

Insulator Binding Binding

Table

Description

fixed,

Post Post

paper,

10%,

600 vdcw

115V

operation

2

230V

operation

Assembly:

(black) (red)

6-8V,

amp,

5-1.

.

slow blow,

Replaceable

15

amp,

#47

Parts

(Cont'd)

Mfr •

56289

81483

24455

71400

28480 28480 28480 G-10D

$ Stock No.

0160-0065

1901-0005

2140-0009

2110-0014

2110-0006

AC-54A

G-10C

TQ·

1 1

1

2 1 1 1

RS·

10

!

1

1 1

J2 J100

J101

J102

L1

L2

P1

R1,2

R3

R4

thru

Not

assigned

Connector,

panel

Connector,

Coil: Coil: type A-11

Cable: power

Resistor:

1.39

Resistor:

2200

Resistor:

390 Optimum value

Average value shown

female

mounting

female,

toroid,

assembly

fixed,

megohms±1%,

fixed,

ohms±10%,

fixed,

ohms±10%,

BNC

Jack,

BNC

Jack

deposited

composition,

1 W

selectedatfactory

carbon,

1 W

2 W

91737

28480 89665

83148

19701

01121

1250-0074

1250-0075

738A-60A 9120-0050

8120-0015

0730-0109

0693-2221

0690-3911

1

1 1

1

2 1

1

1 1

1

00202-2

• See

introductiontothis

section

Se

ct.VPage

4

Model 738A

Ckt Ref

R5

R6

R7

R8

R9

RIO

R11

R12 Same

Resistor:

100,000

82,000

33,000

220,000

270

ohms

330

7500

ohms±10%,

as

R5 Optimum Average

Table

Description

fixed,

ohms

fixed,

ohms

fixed,

composition,

ohms±10%,

composition,

±10%, 1 W

composition,

±10%, 1 W

composition,

ohms

±10%,

metal

±10%, 4 W

composition,

±10%,

wirewound,

value

selectedatfactory

value shown

5-1.

1/2

10 W

1 W

1/2

film,

W

Replaceable

W

Parts

Mfr

(Cont'd)

t$j)

Stoc k No.

*

01121

01121 0690-3331

01121

07115

01121

91637

0690-1041 5

0690-8231

0687-2241 3

0771-0001 1

0687-3311 1

0816-0007 1

TQ* RS*

1

1 1

2

1

R13,14

R15

R16 R17

R18

R19 R20

R21

R22,23

Resistor:

ohms

150

Resistor:

1.2

megohms±10%, SameasR5 Resistor:

200,000

Resistor:

56,000

as

2200

1500

82,000

R17

ohms

Same

Resistor:

fixed,

ohms±10%,

fixed,

ohms±10%,

± 10%,

ohms

±10%,

composition,

±5%,

composition,

1/2

W

1/2

W

01121 0687-1511

01121

01121 0687-5631

01121

0687-1251 1

0686-2045 2

0687-2221 3

0687-1521 1

0687-8231 2

2 1

1

1 1

1

*See

introductiontothis

section

00202-2

Model 738A

Sect.VPage

5

Ckt Ref

R24,25 Same R26

as

Resistor:

5000

assigned

R27 R28

Not Resistor:

220,000

R29

Resistor:

22,000

Not

R30,31

assigned

R32 SameasR5

as

R33 R34,35

Same

Resistor:

300

R36,37

Resistor:

100,000

Table

Description

R8

fixed, wirewound,

ohms

fixed,

ohms

fixed,

ohms

±

1%,

composition,

±10%, 1 W

composition,

±5%, 2 W

R29

fixed, wirewound,

ohms

±5%, 10 W

fixed,

ohms

deposited

±1%, 2 W

5-1.

5 W

Replaceable

carbon,

Parts

Mfr *

91637

01121

35434

(Cont'd)

~Stock

0811-0006 1 1

0690-2241 1

0692-2235

0815-0007

19701 0730-0069

No.

TQ*

2 1

2

RS*

1

R38 R39

R40

R41

R42

R43,44 R45

R46

R47

assigned

Not

Resistor:

175,800

Resistor:

25,000

Resistor:

468,000

Resistor:

12,000

Same

as

Resistor:

120,000

Resistor:

150, 000

Resistor:

100,000

fixed, wirewound,

±

ohms

variable,

1%,

wirewound,

ohms±10%,

fixed, wirewound,

ohms±1%,

fixed,

composition,

ohms±5%,

R20

fixed,

ohms

composition,

±

10%,

composition,

±

10%,

composition,

ohms±10%,

1 W

4 W

1/2

W

91827

79727

91827

0811-0039

2100-0247

0811-0013 1

01121 0686-1235

01121 0687-1241

01121 0687-1541

01121

0687-1041 3

1 1

1

1 1

1

00202-2

* See

introductiontothis

section

Sect.VPage

6 Model 738A

Ckt

R48

R49 R50,51 R52

R53

R54

R55

R56

R57,58

Ref

Resistor:

4.7

megohms

as

90,000

68,000

120,000

820,000

1000

ohms

510,000

R47

Same SameasR5 Resistor:

Resistor:

Table

Description

fixed,

ohms

fixed,

ohms

fixed,

composition,

±10%,

deposited

±

composition,

±10%, 1 W

composition,

ohms

composition,

ohms

composition,

± 10%, 1 W

composition,

ohms

5-1.

1/2

1%,

1 W

±10%, 1 W

±

10%,

1 W

±

10%,

1 W

Replaceable

W

carbon,

Parts

Mfr *

01121

19701

01121

(Cont'd)

~Stock

0687-4751 1

0730-0064 1

0690-6831

0690-1241 1

0690-8241 1

0690-1021 1

0689-5145

No.

TQ* RS*

1

2

1

R59

R60

R61

R62

R63

R64

R65

R66

R67

Resistor:

1

megohm

Resistor:

2.7

megohms

Resistor:

150,000

Resistor:

245,000

Resistor:

10,000

Resistor:

100,000

Resistor:

18 SameasR64 Resistor:

10,000

ohms

fixed,

variable,

fixed,

variable,

composition,

± 10%,

composition,

ohms

wirewound,

ohms

±20%, 2 W

wirewound,

ohms

composition,

±10%, 1 W

1/2

W

± 10%,

± 10%, 1 W

±

1/2

1%,

1 W

wirewound,

1%,

1 W

wirewound,

W

01121

91827

79727

71471

01121

,

71590

0687-1051 1

0687-2751

0690-1541

0811-0037

2100-0246

0811-0019 4

0690-1801

2100-0053

1

•

1

*See

introductiontothis

section

00202-2

Model 738A

Sect.VPage

7

Ckt Ref

R68,69 R70

R71 R72

R73

thru

R100

R101

R102

R103 R104

Same

as

R64

Resistor:

47,000 SameasR47 Resistor:

15,000 Not

assigned

Resistor:

ohms

3000

Resistor:

2980

ohms

as

Same

R101

Resistor:

3010

ohms

Table

Description

fixed,

ohms

fixed,

±.

fixed,

± .1%, 2 W

±.

± 10%, 1 W

wirewound,

± 10%, 20 W

wirewound,

5-1.

composition,

1%,

2 W

1%,

2 W

Replaceable

Parts

Mfr

01121

94310

71471

(Cont'd)

t$

Stock No.

*

0690-4731

0819-0008

0811-0022

0811-0023

0811-0020 1

TQ*

1

2

1 1

RS*

1

R105

R106

R107, R108

R109

R110

RIll

R112

thru R115

R116

thru R122

Resistor:

3006

Resistor:

1202

Resistor:

601

Resistor:

300

Resistor:

120

Resistor:

200

fixed,

ohms

fixed,

ohms

fixed,

ohms

fixed,

ohms

fixed,

ohms

fixed,

ohms

SameasR109

Resistor:

60

fixed,

ohms

wirewound,

± .1%, 2 W

wirewound,

±.

1%,

wirewound,

±.

1%,

wirewound,

± .1%,

wirewound,

± .1%,

wirewound,

± .1%,

wirewound,

± .1%,

1 W

1/4

1-1/4

W

71471

0811-0021 1

0811-0024

0811-0026

0811-0029 6

0811-0031

0811-0030

0811-0032 7

1

2 1

2

1

2

1

2

00202-2

*See

introductiontothis

section

Sect.VPage

8 Model 738A

Cirt

Ref

R123 R124,125

R126 R127 R128

R129,130

R131

R132

R133

as

600

R111

fixed, wirewound,

ohms

Same

Resistor:

8ameasR109 SameasR110 Resistor:

1260

Resistor:

70

Resistor:

35

Resistor:

14

Resistor:

23.33

fixed, wirewound,

ohms

fixed, wirewound,

ohms

fixed,

ohms

fixed,

ohms

fixed,

ohms

Table

Description

± .1%,

1/4

± .1%,

1/4

wirewound,

±.1%,

1/4

wirewound,

± .1%,

1/4

wirewound,

± .1%,

5-1.

1/4

W

1/4

Replaceable

W

Parts

Mfr

71471

(Cont'd)

~Stock

*

0811-0028 2

0811-0027

0811-0025 3

0811-0033

0811-0036

0811-0034

No.

TQ*

1

2 1

2

1 1

RS*

1

R134,135 R136 R137 R138

RT1

81 82

thru

83 8100

8101 8102

Same

as

R129

SameasR131

as

Same

Resistor:

Lamp,

R132

ohms

21

incandescent:

fi,Xed,

Switch, toggle: Switch Not

Switch, Switch,

Switch

assembly:

assigned

rotary:2sect., rotary:2sect.,3pos.

Assembly:

wirewound,

± .1%,

8P8T,

1/4

250V,

OFF-ON

W

lOW

(OUTPUT SELECTOR)

10

pos.

FUNCTION

71471

24455

04009 28480

71471 71471

28480

0811-0035

2140-0007

3101-0001 738A-19A

3100-0205 1 3100-0206

738A-19A

1 1

1

1 1 1

1 1

1

1 1

1

introductiontothis

* See

section

00202-2

Model 738A

Sect.VPage

9

Table

Ckt

Ref

)

S103

Switch, Switch

S104

Switch,

Switch T1 T2 T3

VI V2 V3 V4 V5

..

V6,7 V8

Transformer,

Not

assigned Transformer, Tube, Tube, Tube, Tube,

Tube, Tube, Tube,

Description

rotary:2sect.,7pos.

Assembly:

rotary:3sect.,5pos.

Assembly:

power

output electron: electron: electron: electron: electron: electron: electron:

5-1.

MULTIPLIER

RANGE

6AU6 6CL6 6BA6 12AX7 12AU7 6550 6AL5

Replaceable

Parts

Mfr

71471 28480

(Conttd)

*

~Stoclt

3100-0203 738A-19C

3100-0204

738A-19B

28480 9100-0082

28480 80131 80131 80131 80131 80131 80131 80131

9120-0030 1 1923-0021 1923-0030 1923-0025 1932-0030 4 1932-0029 1923-0009 1930-0013 1

No.

TQ*

1

1 1

1 1 1 1 1 1

1 1 1

RS*

1

1 1

1

4

1 1

V9 V10 Vll,12 V13 V14

SameasV4

electron:

Tube, SameasV4 Tube,

electron: electron:

Tube,

MISCELLANEOUS

Attenuator,

thru

R101 (Due

to

parts

usedinthis recommended ator

assemblybesenttothe

for

repair

Blade,

Filter,

Holder,

fan

air

fuse

Knob

Lampholder,

Oil,

soluble:

spray

with

5651

5U4GB 6AV5GA

assembly:

R138, S101

the

extreme

that

and

candelabra

for

air

dispenser

includes

thru

precisionofthe

assembly,itis

the

complete

calibration.

filter;

I-pint

J101,J102,

S104

attenu-

factory

)

can

80131

28480

06812

1940-0001

1930-0008 1923-0023

738A-34A 1

3160-0014 82866 3150-0005 75915

1400-0084 1 28480 G-74N 5 95263 1450-0013 82866 3150-0002

1 1

1 1 1

1

1 1

1 1 1

1

1 1

1 0

00202-2

* See

introductiontothis

section

Appendix

CODE

APPENDIX

LIST

OF MANUFACTURERS (Sheet 1

of

2)

Model

738A

The following and H4-2 the

bottomofeach

CODE

NO.

MANUFACTURER

Humidial

00334

Westrex

00335

Garlock

00373

Aetoval(

00&5&

00719

Amp,

00781

Aircraft

Sangamo

00853

Goe

008&&

CarlE.Holmes

008'

1

Allen Bradley

01121

litton

01

255

Pacific Semiconductors,

01

281

01

H5

Tnas

The

01349 01

5 & 1

Chassi-Trak

01'10

Am.rock Pulse

01"

1

021

1 4

Ferroxcube

Cole

0228& 02&& 0

Amphenol Radio

02735

02771 02777 03508 03705

0319 038 038

039

0400'

040

04222 04

04404 04&51

0471 04732 04773

0500& 05277 05H3 05&24

057H

05783

0&0

0& 0&81 07

Semiconductor

Vocaline

Hopkins G.E.

Apex

Eldema

7

7 7

Transitron Electronic

8 8

Pyrofilm Resistor

5 4

Air Arrow,

&2

Elmenco Hi-Q

H8

Elgin

Electronics Division Burbank,

Dymec Division

Hewlett-Packard

Spedal

Sylvania

J

Motorola.

Prod. Div. Phoenix,

Filtron

Western

Automatic

Twentieth Westinghouse

Semi-Conductor

Iliumitronic

Barber

Metropolitan

Metro'

Stewart

0 4

The Bassick

5 5 5

Beede

2

Torrington

1 1 5

Corning

Electronic

code

numbers

are

from

the

Federal Supply

(CodetoName) and their latest supplements. The

page.

Alphabetical codes have been arbitrarily assignedtosuppliers not

CODE

NO.

MANUFACTURER

Digitran

0712&

Transistor Electronics

07137

N.J.

Calif. Calif.

Calif.

Tn.s

Ohio

Calif.

N.Y.

Calif.

N.J.

Calif.

Ohio

Calif.

Mass.

N.J.

Calif.

S.C.

Calif.

N.H.

Pa.

111.

III.

2&" 2

III.

13173 35434 37'42 H543

40nO

42"

43"0

44& 41904

Westinqhouse

07138 072&

072&

07'10 01933

07'10 OBI 0835B

0871 0871

08192

0'02& 0'134 0'250 0'5"

1

041 10&4& 1123& 1 1

1 1312 1

1870 12" 14&

1

5'0'

1 &7 5 B Delco Radio Div,ofG.M.Corp. 18873E.I.

l'

1 , 5 0 0 Thomas A. Edison Industries,

1'701 201 21

2 1 3 3 5 The Fafnir Bearing

21' 24446

24455 24&

2&4&2

848

Electronic

Avnet

1

Fairchild

3

Continental

Rheem

Boonton Radio U.S.

Engineering

45

Burgess Battery

Sloan

7

Cannon

B

Phoenix Div.

CBS Electronics

Operations,

Babcock Relay., Inc.

Texas Electro

Mallory Battery

Canada,

Ti-Tal, Inc. Berkeley,

1

Carborundum CTSofBerne, Inc. Berne, Ind. Chicago

237

Microwave Electronics

Mel.b.,

Claro.lal

7

Cornell

5 5

The Daven

31

520

DuPonl

5 Eclipse

Bendix AviatIon

Div.

Electra Electronic

83

Fansteel

&4 Fed. Telephone

General G.E.,

lamp

General

5 5

Grobet Hamilton

2

Hewlett-Packard

0

G.E. Receiving

Leclrohm Inc. P,R,Mallory &

Mechanical

Miniature

Muter

0

C.A.Norgren

Ohmite

5 5

Polaroid

19&1

Co.

Corp.

Packing

Electronic

Inc.

Engine.ring

Industries, Inc.

I"drum.nh

Semiconductor

Alliance Mfg,

Engineering

Mfg.

Corp.ofAmerica

Semiconductor

Machine

Marine

Hart

DivisionofAerovox Myrtle Beach, National

Tube

Co.,

Colman

Electrical

Co.,

Produch

Corp.

Radio

Corp.

Electric

Co.

Corp.

Co,

, Inc.

Components

Corp.

Co.

Corp.ofAmerica

Co.

Electronics

and

Co.ofAmerica,

Engineerinq

& Tool

Corp.

Co.

Motors, Inc.

and

Hegeman

Products

Co.

Watch

of

Operations

Electronic

Inc.,

Semiconductor

Inc.

Division

Electric

Co.

Century

Plastics, Inc.

Electric

Dept.

Engineering

Co.

Telecommunications

Cap.

Div. Brooklyn, N.Y.

Engineerinq

Co.

Instrument

Mfg.

Co.,

Glass Works

Components

Div.

New Bedford, Mass.

Co.,

Cap.

los

B~v.r1y

Inc.

Culver City,

Co,

Indianapolis, Ind.

Santa

Corp.

Materials

Inc.

Old

Co.

San

Products

Co.

Corp.

Los

Elect.

Co.,

Co,

of

Systems

Mountain View,

Culver

los

Corp.,

Co.

Bridqeport, Co.,

West

Div.

Dept.

New York, N.Y.

Harrisburg.

Div.

Angeles, Angeles,

Milwaukee, Wis.

Div.

Alliance,

Saugerties,

Palo Alto,

Somerville,

Saybrook, Conn.

Fernando,

Dept.

EI

Wakefield,

Morristown,

Angeles,

Hartford,

New York, N.Y.

Palo Alto, Calif,

Northlake,

Angeles,

Younqwood, Pa.

Sunnyvale,

Soquel,

Penacook,

Van Nuys,

ADDRESS

Colton, Calif,

Camden,

Boonton,

Marion. III.

Hills,

Dallas,

Rockford,

Clara,

Chicaqo,

Div.

Syracuse, N.Y.

Dayton,

Monle,

Co.

Conn.

Aritona

City,

Calif.

Rockford,

Corp.,

Calif.

Conn.

Inc.

Calif.

Bradford, Pa.

00015·17 Revi.ed:17Oclober

Code

for Manufacturers

dateofrevision and

Co.

Corp.

Semiconductor

Company

Electric

Capacitor

Assemblies,

TelephoneofCalifornia,

Inc.

Mfg,

Dubilier

Pioneer

of

McGraw·Edison

Manufacturing

Tube

Metallurqical

Electric

Radio

File

Watch

Precision Bearings, Inc.

Co.

Mfg.

Corp.

Electric

Corp.

Tube

Div. Elmira, N.Y.

Device

ltd.

Co,

Ind

Division

Co.ofAmerica,

Industries

Mountain

Corp.

Mountain View,

Corp.

Co.

Niagara

Falls,

Co.

Semiconductor

Div.ofC.B.S. Inc.

Co.

Inc.

Co.

of

Toronto,

Co.

Corp.

Co,

Elec.

Corp.

Co,.

Inc. Wilmington, Del.

Div.

of

z

Corp.

Co.

Corp.

Co.

and

Radio

Co.

Nela Park,

Co.

West

Co.

Tube

Dept.

Co"

Inc.

Prod.

Co.

ADDRESS

Pasadena,

Minneapolis,

Los

Angeles,

Corp.

View,

Hawthorne,

800nton,

Los

Anqeles,

Ontario,

Canada

Burbank,

lowell,

Costa

Mesa,

Houston, Texas

Chicago,

Ontario,

Canada

Niagara

Falls, N.Y.

Inc.

So.

Pasadena,

Palo Alto.

Palo Alto,

Dover. N.H.

50, Plainfield, N.J,

Living.lon, N.J,

Kokomo. Ind.

Teterboro,

Co.

West

Orange,

Kansas

City,

Philadelphia,

No.

Chicago,

New Britain,

Corp. 5cheneclady, N.Y.

Palo Alto,

Indianapoli.,

Englewood,

Cambridge,

From:

Clifton, N.J.

Cleveland,

Concord,

Inc.

Carl.tadt,

lancaster,

Owensboro,

Chicago,

Co.

Akron, Keene,

Chicago.

Skokie.

F.S.C. H4·1 H4·2

Conn.

Calif.

Colo.

Mass.

Dated Dated

Cataloging

the

Calif.

Minn.

Calif.

Calif. Calif.

Calif.

N.J.

Calif.

Mass.

Calif.

III.

Calif.

N.J.

Mo.

Pa.

III.

Ohio

Mass.

N.J.

Pa.

Ky.

III.

Ind.

Ohio N.H.

III.

Handbook

April April

Handbooks

dateofthe

supplements used

appearingintheH4handbooks.

CODE

NO.

MANUFACTURER

Precision

4B &2 0

4" 54H4 5502& 55'13 55nB 5&

5 & 2

5'44&

&1

&

&4'5'

&50'1 &&346

7027& 7030' 70

705&3 70'03 70"8

7 1 0 0 2

7 1 0 4 1

7 1 2 1 8

7 1 2

7 1 3 1 3

71400 71

714& 71471 71482 715'0

71 7 1

7 1753A.O. 7 1 7 B5 Cinch Mfg.

7 1 72

72354 72&1' 72& 7275 727&5 72

7 H 28

7HB2 730& 73138

73H3

73445

7350&

73 73&

7374 737'3

In.t,

Co.

Rlytheon Mfg.

5 &

Shallcross Mfg.

Simpson

Electric

Sonotone

Corp. Sorenson&Co., Spaulding

137

Sprague

B'

77

5

21

"

4B 5

8&

450

B

700 744

'84 1 3 & Electro Mofi..Mfg.

5 &

B

B25

1

55'

8 2

3 Fi.cher Special Mfg.

Supplements

1961 1961

Electric

Telex, Inc.

Union Switch

Div.ofWestinghouse

Universal Electric

Western

Electric

Weston

Inst. Div.ofDaystrom, Inc.

Wollen.ak Allen Mfg. Allied

Control

Atlantic

India

Amperite

Bolden Mfg.

Bird

Electronic Birnbach Boston

Gear

Murray

Bud

Radio

Camloc

Faste"er

AllenD.Cardwell

Prod.

Corp.

Bussman" Fuse Div.ofMcGraw·

Edison

Co.

CT5

Corp.

Cannon

Electric

Cinema

Engine.ring

C.P.Clare&Co.

Centra

lab

The

Corni.h

Chicago

Miniafure Lamp Works

Smifh

Dow

Corning

JohnE.Fa.t&Co. Dialight

Corp.

Gener.1

Ceramics

Girard-Hopkins

Drake Mfg. Hugh H. Eby Inc,

Gudeman

Co.

Erie Resistor

Hansen

Mfg.

Helipot

Dlv.ofBeckman

Instruments, Inc.

Hughes

Products

Div.ofHughes

Amperex

Electronic

North

American

Bradley

Semiconductor

Carling

Electric, Inc.

GeorgeK.Garrett

The

General

H4-'

Thermometer

Co.

Inc.

Fibre

Co., Co.

and

Signal,

Co.

Co.,

Optical

Co.

Co,.

Rubber

Co.,

Inc.

Co.

Corp.

Radio

Co.

Works

Co.ofTexas

Inc.

Corp.

Electronic

Co.

Div.ofGlobe

Wire

Co.

Corp.,

Corp,

Corp.

Co.

Corp.

Co.,

Inc.

Aircraft

Co.,

Phillips

Co.,

Co.

Indu.trie.

(NametoCode)

appear

ADDRESS

and

Philadelphia, Pa.

Waltham,

Mass.

Selma, N.C.

Chicago.

Elmsford, N.Y.

So. Norwalk,

Inc.

Tonawanda,

North

Air Brake

Inc. New York, N.Y.

Hartford,

Inc, New York, N,Y.

Works, Inc.

Cleveland,

New York, N.Y.

Div.

of

Cleveland,

Los

Union Inc.

Crowley Div.

We.t

Co.,

Inc. Willimantic,

Philadelphia, Pa,

Co.

Newport

Div.

of

Co.,

Corp.

New

HarHord,

Inc.

Philadelphia, Pa.

Cincinnati,

Co.

Conn.

Adams,

Mass.

St. Paul, Minn,

Co.

Pittsburgh. Pa.

Owosso, Mich.

Newark, N.J.

Rochester, N.Y.

Conn.

Chicago.

New York, N.'r.

Chicago.

Ohio

Quincy, Mass.

Ohio

Paramus,

Plainville,

Conn.

St.

louis,

Elkharf. Ind.

Angeles,

Calif.

Burbank,

Calif.

Chicago,

Milwaukee, Wis.

New York. N.Y.

Chicago.

Orange,

N.J,

Chicago,

Midland, Mich.

Conn.

Chicago,III,

Brooklyn, N.Y.

Kea.bey. N.J.

Oakland,

Calif.

Chicago.

Chicago,

Erie, Pa.

Ind.

Princeton,

Fullerlon,

Calif.

Beach,

Calif.

Inc.

Hick.ville, N.Y,

Haven,

Conn. Conn.

Ohio

Elyria,

Ohio

N.Y.

N.J.

Mo.

at

III.

•

III.

•

00202-2

Model 738A Appendix

APPENDIX

..

CODE

LIST

OF MANUFACTURERS (Sheet 2

of

2)

CODE

MANUFACTURER

NO.

Jennings

R.dio

Mfg.

73

905

J.

74455 74861 748 749 75042 75173

75378 7538

7581 7591 76005 7621 76433

76487

76 76 76854 77068

77221

773 77 77634 77638

77764

78283 78471 78488

78553

78790 78947 79142 79251 7972

79963 80031

801

80207

80248 8041 80486

80583

80640

81

8141 81

81483

81 82042 82142

821 82209 8221

82376 82389

H. Winos, Industrial Industrial

6 8

E.F.Johnson

7 0

International Jones,

Howard

of

Circh

James

Knights

Kulk. Electric Mfg.

2

Lent Electric Mfq.

8

Littelfuse Inc.

5

Lord

Mfg.

C.W.M.rwedel

0

Micamold

James

Millen

Monadnock

5 3 0

Mueller

5 4 5

6 3 0

030

453

860

4 2

7

30 3 1

1

5

70

9

Electric

Oak

Manufacturing

Bendix

Corp.,

Pacific Div. No. Hollywood,

Phaostron Instrument and

Electronic

Potter

and

Radio

Condenser Radio Essentials Inc. Mt. Vernon, N.Y. Radio

Receptor Resistance Signal

Indicator

Mfg.

Tilley Stackpole Tinnerman Transformer Ucinite

Co.

Veeder

Root, Inc.

Wenco

Mfg.

Continental·Wirt

Zierick Mfg. Mepco

Division

Sessions Times Facsimile Electronic

Any

brand

standards Unimax Switch, Div.

W.L.Manon Oxf""d

Electric

Acro

Manufacturing

All

Star

Products

Hammerlund

Arnold,

Stevens,

International

Wilkor

Products,

Raytheon Mfg.

Tube

Division

nternational

I

Barry

Controls,

C.rter

Parts

Jeffers

Electronics Division

Speer

Carbon AllenB.DuMont Labs., Inc. Maguire

'ndustries,

Sylvania Electric Prod. Inc.,

Electronic

Co.

Astron Switchcraft,

Co.

and

Sons Condenser Products

Corp.

Co.

Resistance

8., Division

Mfg.

Corp.

Co.

Co.,

Co.

Electronic

Brumfield, Inc. Princeton, Ind.

Products

Co.

Carbon

Products,

Clock

Industries

Mfg.

Co.,

Mills San

Co.

Bendix

Co. South

Co.

Co.,

Inc. Brooklyn, N.Y.

Co.

Corp.

Co.

Inc.

Engineers

Co.

Electronics

Corp.

of

Co.

Corp.

Association

tube

meeting

of

Corp.

Co.

Inc.

Co., Inc.

Co.,

Inc.

Instruments,

Inc.

Co.,

Industrial

Rectifier

Inc.

Co.

Inc.

Tube

Div.

Inc.

ADDRESS

S.n

Jose,

Winchester.

Chicago,

Danbury.

Waseca,

Co.

Philadelphia,

Chicago,

S.ndwich,

Inc.

Mt.

Vernon,

Chic.

Des

San Francisco,

Corp.

8rooklyn, N.Y.

Inc.

Malden,

Leandro,

Cleveland,

Chicago,

Pasadena,

Camden,

Harrisburg, New York, N.Y.

San Francisco,

St. Marys, Pa. Cleveland, Pasadena,

Newtonville, Mass.

Hartford,

Chic.

Corp.

Philadelphi.,P•.

New Rochelle, N.Y.

Morristown,

New York, N.Y.

EIA

Washington,

Wallingford,

Chic.go,

Columbus,

Defiance,

New York, N.Y.

80ston,

Inc.

Haven,

New

Cleveland,

Quincy, Mass.

Corp.

EI

Segundo,

Watertown,

of

Du

Clifton,

Greenwich,

Emporium,

East Newark,

Chic.go,

go,

PI.ines,

Erie, Pa.

go,

Skokie,

Bois, Pa.

00015·17 Reyised:

C.lif.

M.ss.

Conn.

Minn.

N.Y.

Calif.

Mass.

Calif.

Ohio

Calif.

N.J.

Calif.

Ohio

Calif.

Conn.

N.J.

D.C.

Conn.

Ohio Ohio

Mass.

Conn.

Ohio

C.lif.

Mass.

N.J.

Conn.

N.J.

Mass.

Wis.

N.Y.

C.lif. Calif.

N.J. N.J.

N.J.

Ind. Mo.

Calif.

Neb.

N.J.

Calif.

Conn.

III.

N.J.

Calif.

III.

N.Y.

III. III.

N.J.

Calif.

111.

Mass.

Neb.

Pa.

·Mass. Calif.

III.

Calif.

Mass.

Ohio

N.H.

Mass.

Colo.

N.J.

III.

Mass.

Fla.

N.Y.

Calif.

Wyo.

Conn.

H.ndbook Dafed D.ted

April April

CODE

NO.

MANUFACTURER

Methode

95354 95987 96

0 6 7

96

095 96296 96

33

0

96341 96

493

96

50

1

97539

979

6 6

981

41 98220 98278 98291 98405 9873

4

98925

98978

99109 99

313

99

515

99707

99

8 0 0

99

8

21 99848

99

9 3 4

99942

99

9 5 7

THE

FOLLOWING

BER

ASSIGNEDINTHE THE FEDERAL SUPPLY HANDBOOK.

oa0 aC

0000FMalco 0000

H PhilcoCorp.IL.nsd.le

a

000

I Telefunken

0000

L

0000

M

0000

N Nahm-Bros.

0000

P Ty·Car Mfg.

0000

T Texas Instruments, Inc.

000

aU Tower Mfg.

0000

V

0000

W

a0 0 0 X

0000

Y

0000

Z Willow

000

A A British

000

B 8 Precision

000

C C

00000

Supplements

1961 1961

Mfg, Weckesser Huggins

Laboratories

Hi-Q

DivisionofAerovox

Solar

Manufacturing

Carlton

Screw Microwave J.W.Miller Excel

Transformer

Automatic

Mfg.

Co.

CBS Electronics,

of

Diy.

Axel Brothers Inc.

L.

Mosley

Francis Microdot, Sealectro

Corp.

Carad

Corp.

Palo

Alto

Engineering

Co.,

Inc.

Clevit.

Transistor

Div.ofClevite

International

Research

Columbia

Technical

Varian

Associates

Marshall Industries,

Products

Control

Switch Division,

of

America Delevan Electronics North

Hills Electric

WHco

Corporation Renbrandt, Hoffman

Semiconductor

Hoffman

Technology

of

C.lif.

Connor

Spring

Tool

Division)

Elite) New York, N.Y.

Winchester Western

Coil

Ind., Inc.

Metals

and

Imperial

Electronics, Inc. Buena Park,

Webster

Electronics

Spruce

Pine Mica

Midland

Mfg.

Leather

Radio

Instrument

Computer

General

Transistor

Co.

Associates,

and

C.8.S.,

Inc.

Corp.

Division

Inc.

Electronics Instruments

H·P VENDORS

.nd

Electronics, Inc.

Corp.

Diode

Inc. Burlington, Mass.

Co.

Precision

Inc.

Redwood

Prod.

Corp.

Electronic

Corp.

Electron

Controls

Corp.

Co.

G".t

Div.

Corp.

No. Hollywood,

LATEST

CODE

FOR MANUFACTURERS

Mfg.

Co.

San

Die Los

(c/o

American

Div.ofAutomatic

Spring

Co.,

Controls

Co.

Santa

Redwood

Co.

Inc. Holliston, Ma

Div. Versailles,

Co.

Inc.

Co.

Inc. Kansas

Products

Corp.

Electronics Ltd.

Components

Corp.

ADDRESS

Chic.

go,

Chicago,

Sunnyvale,

Calif.

Olean,

Los

Angeles,

Calif.

Chicago,

Los

Angeles,

C.lif.

Oakland,

Calif.

Yonkers, N.Y.

Danvers, Mass.

Jamaica,

Pasadena,

So.

New Rochelle, N.Y.

EI

East

Indianapolis,

of

HAVENONUM· SUPPLEMENT TO

San

Spruce

Washington,

los

Calif.

Pasadena,

Calif.

City,

C.lif.

P.lo

Alto,

C.lif.

W.lth.m,M....

8urb.nk,

C.lif.

New York, N.Y.

P.lo

Alto,

C.lif.

Pasadena,

Calif.

Co.

Segundo,

Calif.

Aurora,

Neck, L.I., N.Y.

Mass.

Boston,

Evanston,

C.lif.

Francisco,

Calif.

Angeles,

Calif.

lansdale,

Monica,

Calif.

City,

C.lif.

Leandro,

Calif.

Providence,

Calif.

New York, N.Y.

Pine, N.C.

City,

Newark,

Co.

Van Nuys,

Calif.

Lodi,

Angeles,

Calif.

N.Y.

Ind.

Pa.

Ky.

R.I.

Kans.

N.J.

D.C.

N.J.

III. III.

III.

...

CODE

NO.

MANUFACTURER

Texas Instruments, Inc.,

82647

III.

82866 82877

82893

Pa.

83148 831

III. III.

83298 83501

III.

83594

III.

83777 83821

841 84396

84411 849 85454

III.

8547 85660

8591 86684

87473 881

Pa.

89473 89636 896

901

90970

91

III.

91

91637

91 91737 91 91

92196

933

93369

III.

9341

93

941

94148 941

941 9431

III.

94682 95236

95238

95263 95264

Pa.

95265 95275

III.

17

October

Metals

and

Controls

Spencer Research Products Rotron

Vector Electro Victory

86

Bendix Gavitt

Burroughs

Loyd Arco

71

A. Good

Sarkes

7 0

R.M.Bracamonte&Co.

4

Koiled Kords, Inc. Seamless

1

Radio

Western Cutler·Hammer,

40

General Carter United

6 5

U.S.

79

Bearing Radio

4 1 8

Augat

506

Dale

662

Gremar K F

827

Micro·Switch Div.ofMinneapolis

929

Universal Sylvania Electric

3 2

Robbins Stevens

0

Insuline·Van

983

Raytheon Mfg.

44

Raytheon Mfg.

45

Scientific Tung.Sol Electric, Inc. Newark,

54

Curtiss-Wright

97

Tru

0

Worcester Allies

Continental Leecraft Lerco Electronics, Inc. National Vitramon, Inc.

1961

Products

Manufacturing

Electronic

Cords Engineering

Corp.,

Wire

Div.ofAmerace

Corp.,

Electronic

Model

Eng.

and

Scruggs Electronics, Inc.

J.

Glesener All Electric Mfg.

Tartian,

Molding

Boonton

Rubber

Corp.ofAmerica,

Electron

Tube Div.

Fibrous

Electric Parts Div.ofEconomy Baler Transformer

Rubber

Goods

Div. Passaic.

Engineering

Materials

Brothers,

Products,

Elco

Corp.

Mfg.

Development

Honeywell

Metal

Semiconductor

and

Mfg.

Norman

Electronic Division

Tube Div. Quincy,

conductor

Radio

Ohm

Prod. Div.ofModel

Engineering

Pressed Aluminum

Products

Connector

Mfg. Co., Inc.

Coil

Oiv.,

Corp.

Co.,

Co.

Corp.

Red Bank Div.

and

Cable

Corp.

Tube

Oiv.

Mfg., Inc.

Co.

Co.,

Inc.

Co.

Inc. Bloomington, Ind.

Company

Co.

Glass

Inc. Lincoln,

Distributing

Co.

Co.,

Mechanical

Co.

'Inc.

Inc.

Co.,

Inc.

Co.

Regulator

Co.

Products, Prod.

Div.

Myers, Inc. New York, N.Y.

Co.,

Inc.

Ind., Inc.

Co.,

Receiving

Co.,

Semi·

Div.

Products,

Corp.,

Electronics Div.

and

Mfg.

Corp.

Co.

Attleboro,

Madison,

Inc.

Woodslock,

Glend.le,

Los

Angeles,

Red

Co.,

Brookfield, Mass.

PI.infield,

Huntington,

New York, N.Y.

San Francisco,

Og.II.la,

Boonton,

San Francisco,

New

Haven,

Chicago,

RCA

Harrison,

Products

Co.

San Francisco,

Corp.

Schenect.dy,

Chic.go,

Chicago,

San Francisco,

Chicago,

Attleboro,

Columbus,

Philadelphia,

Wakefield,

Redwood

Freeport,

Inc.

Bassett Puente,

Inc.,

Woburn,

Mansfield,

Manchester,

Newton,

Inc

loveland,

C.rlst.dt,

Co.

Chicago,

Corp.

Worcester,

Woodside,

New York, N.Y.

Burbank,

Sheridan,

Bridgeport,

From:

F.S.C. H4·1 H4·2

ADDRESS

Union,

8.nk,

Festus,

Co.

City,

Miami,

00202-2

i-lji-2

r-----------WARRANTY-------------,

All

our products are warranted against defectsinmaterials and workmanship for one rear from

oj

the dale

u:hich

shipment. Our obligation

prove tobedefective during the warranty period. We

damages.

For

assistanceofany

Sales Representative for instructions. Give full

and

serial numbers. Service

charge for

non-warrantyorother service work will alwaysbesupplied.ifrequested. before work begins.

repairofinstruments under warranty, except transportation charges. Estimatesofcharges for

kind, including help with instruments

dataorshipping

;'1

limited10repairing or replacing products (eXCepllubeS)

Ofe

TWt

liable for consequemial

under

detailsofthe difficulty

instructions

will

be promptly senttoyou.

warranty,

contact

and

include the instrument model

your

There

authorized

will

be

~

110

CLAIM

Your instrument should be in peeted safe carrier

FOR

DAMAGE IN

delivery.Ifthe instrument is damaged in

or,ifinsured

separately,

SHIPMENT

and

testedassoon asitis received.

with the insurance company.

any

wayorfails to

operate

The

instrumentisinsured for

properly,

file a claim with the

SHIPPING

On

receiptofshipping instructions. forward the instrument prepaid to the destination indicated. You may usc the bag movement in ide the container.

original

and

surrounditwilh Ulrecorfour inchesofsho k-absorbing material to cushion it firmly and prevent

shipping cartonorany

strong container.

Wrap

the instrument in heavy

paperora plastic

GENERAL

Your

authorized 8 Sales Representative

come to gel

directly

CUSTOMER SERVICE

Hewlett-Packard Company

395 Page

Palo Alto, Califomia. U.S.A. Telephone: DAvenport 6-1755

TWX Cable, "HEWPACK"

in touch with Hewlett-Packard service

Mm

Road

Dired

Dial

Area

No.

PALAL117-U

Code..15

is

ready

to assist

yOllinany

departments:

OR

(I.

Hewlett-Packard S.A.

RueduVieull

Geneva, Switzerland

Telephone, (022)26. 43. 36 Cable, "HEWPACKSA"

situation,

Welte",

and

you

Europe)

Billard

No.1

are

always wel-

00390·1