Hammarlund SP-600-JX-21 Betriebsanleitung

~-------------*--------------;;;

T.O.

31R2-4-10l-2

HANDBOOK

SERVICE INSTRUCTIONS

RADIO

RECEIVER

MODEL

SP-600-JX-21

(HAMMARLUND)

PUBLISHED

UNDER

AUTHORITY

THE

SECRETARY

THE

AIR

FORCE

:...-_-----------...,...*-------------~

AF,

Nunn.

Rimmler,

Inc.,

Cincinnati,

Ohio,30C,

8-6S--JlEPRINT

JANUARY

1956

T.O. 31R2-4-101-2

Reproduction

for

non-military

use

the

information

illustrations contained in this

pub-

lication

not

permitted

without

specific

approval

the

issuing service (BuAer

USAF).

The

policy

for

use

Classified Publications

established

for

the

Air

Force in

AFR

205-1

and

for

the

Navy

Regulations,

Article

1509.

LIST

REVISED PAGES ISSUED

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

INSERT

LATEST

REVISED PAGES. DESTROY SUPERSEDED PAGES.

NOTE:

The

portion

the

text

affected

the

current

revision is

indicated

venicalline

the

outer

margins

the

page.

*The

asterisk

indicates

pages

revised.

added

deleted

the

current

revision.

ADDITIONAL COPIES

THIS PUBLICATION MAY

OBTAINED AS FOLLOWS:

USAF

ACTIVITIES.-In

accordance

with

Technical

Order

No.

00-S-2.

NAVY

ACTIVITIES.-Submit

request

nearest

supply

point

listed

below,

using

form

NavAer-I40:

NASD.

Philadelphia.

Pa.;

NAS,

Alameda.

Calif.;

NAS.

Jacksonville.

Fla.;

NAS.

Norfolk.

Va.;

NAS.

San

Diego.

Calif.;

NAS.

Seattle.

Wash.;

ASD.

NSC.

Guam.

For

listing

available

material

and

details

distribution

see

Naval

Aeronautics

Publications

Index

NavAer

OO·SOO.

USAF

Section

T.O. 31R2-4-101-2

TABLE

OF CONTENTS

Table

Contents

Page

INTRODUCTION

DESCRIPTION

AND

LEADING

PARTICULARS

1-1.

1-4.

1-10.

1-20.

1-33.

General.

. .

Purpose

and

Limitations

Leading Particulars .

Condensed Factual

Data

Operating

and

Adjustment

Controls

TEST

EQUIPMENT

AND

SPECIAL

TOOLS

2-1.

Test

Equipment.

. .

2-3.

Special

Tools....

2-5.

Cable Fabrication .

III

PREPARATION

FOR

USE

AND

RESHIPMENT...............

3-1.

Preparation

for

Use ."."'. .

3-7.

Preparation

for

Reshipment

Storage

THEORY

OPERATION

4-1.

General

System

Operation

4-4.

Receiving System Block

Diagram

4-8.

Receiver Functional

Operation

4-22.

Simplified Circuit

Theory.......

ORGANIZATIONAL

MAINTENANCE

5-1.

General

5-3.

Receiver Performance Tests 33

5-6.

Trouble

Analysis.

5-11.

Minor

Repair

and

Replacement 39

5-16.

Removal

and

Replacement

Subassemblies 39

5-19.

Alignment

and

Adjustment

5-23.

Preventive Maintenance 43

FIELD

MAINTENANCE

6-1.

Trottble Analysis

6-7.

Removal

and

Replacement

6-14.

Receiver

Alignment

and

Adjustment

6-17.

Receiver Performance Tests

6-19.

Preventive Maintenance 54

6-22.

Overhaul

Schedule

VII

DIAGRAMS

7-1.

General

7-3.

Index

Diagrams

7-5.

Tube-socket

Terminal

Voltage

Diagram..................................

7-7.

Tube-so<;ket

Terminal

Resistance

Diagram

VIII

DIFFERENCE

DATA

SHEETS ..................................... 65

List

Illustrations

Figure

T.O.

R2-4-101-2

LIST

OF ILLUSTRATIONS

Page

1-1

Radio Receiver,

Model

SP-600-JX-21

1-2

Radio Receiver,

Front

Panel

View.

1-3

Radio Receiver, Rear

View.

1-4

Overall Selectivity Curves

Two

Megacycles . . 6

1-5

Audio

and

Overall

Fidelity Curves 7

2-1

Special Pliers 9

2-2

Antenna

Cable....................

2-3

Cathode-follower Cable . . 10

4-1

Space-diversity Reception

Frequency-shift Signals, System Block

Diagram

4-2

Radio Receiver, Block

Diagram

.15

4-3

Radio-frequency Amplifiers, Schematic

Diagram

...

4-4

Single-

and

Double-conversion Circuits, Schematic

Diagram

.19

4-5

Fixed-frequency

and

Variable-frequency Oscillators, Schematic

Diagram

4-6

455-kc Crystal Filter, Simplified Schematic

Diagram

4-7

445-kc Intermediate-frequency Amplifier Circuits, Schematic

Diagram.

4-8

Beat-frequency Oscillator

and

Buffer Circuits, Schematic

Diagram

.26

4-9

Detector, Noise-limiter

and

A-V-C Circuits, Schematic

Diagram

4-10

Audio

Circuits, Schematic

Diagram

.29

4-11

Power

Supply, Schematic

Diagram

5-1

Receiver Sensitivity

Test

Setup.

5-2

Receiver Cathode-follower

Test

Setup 37

5-3

Radio Receiver

Test-point

Location .

5-4

Radio Receiver,

Top

View

Chassis 41

5-5

Radio Receiver

Alignment

Adjustments........

6-1

Receiver

Audio

Response

Test

Setup.

....

6-2

Receiver Overall Response

Test

Setup.

6-3

Test

Setup

for

Alignment

Receiver

I-F

Stages.

6-4

Alternate

Test

Setup

for

Alignment

Receiver I-F

Stages.

7-1

Radio Receiver, Schematic

Diagram

7-2

Tube-socket

Terminal

Voltage

Diagram

7-3

Tube-socket

Terminal

Resistance

Diagram...............................................

T.O. 31R2-4-101-2

LIST

TABLES

List

Tables

Table Page

Tube

Complement

Fuse

Complement

. .

....

III

Tuning

Band

Ranges...........................

Image Rejection Ratios 5

Test

Equipment

Required

for

Maintenance............

Special

Tools

Required

for

Maintenance

VII

Power

Transformer

Tap

Voltage

Ratings

VIII

Plug

Connector

Assemblies Removed

from

Receiver

for

Shipment.

Receiver

Performance

Tests.

Power

Supply

Test-point

Data.

Receiver Sections

Test-point

Data

XII

Alignment

Frequency

and

Adjustment

Designations .43

XIII

Inspection Schedule 43

XIV

Troubleshooting.....................................

Tube-socket

Terminal

Voltages

XVI

Tube-socket

Terminal

Resistances

XVII

D-C Resistance

Coils

and

Windings......

XVIII

Receiver

Alignment

and

Adjustment

Procedures

XIX

Receiver

Performance

Tests 58

Receiver

Overhaul

Schedule 60

iii

T.O. 31R2-4-101-2

~"'(;).":':

.~;

.',,'."

, ,

figure

1-1.

Radio

Receiver, Model SP-600-JX-21

T.O. 31R2-4-101-2

INTRODUCTION

This

handbook

has been

published

furnish

maintenance

personnel

with.

descriptive

information

and

maintenance

instructions

for

Radio

Receiver,

Model

SP-600-JX-21,

manufactured

the

Hammarlund

Manufacturing

Co., Inc.,

New

York

I,N.

The

handbook

has

been

prepared

accordance

with

Specification

MIL-H-

6757

A(ASG).

Abbreviations

used

are

accordance

with

Air

Force-Navy

Aeronau-

tical

Bulletin

No.

261. Electrical

and

electronic symbols used

the schematic

diagrams

conform

Standard

JAN-STD-15.

For

additional

information

the

radio

receiver,

the

following

publications

should

consulted:

Introduction

Section I

Title

Handbook

Operation

Instructions

Radio

Receiver,

Model

SP-600-JX-21

Handbook

Overhaul

Instructions,

Radio

Receiver,

Model

SP-600-JX-21

Illustrated

Parts

Breakdown,

Radio

Receiver,

Model

SP-600-JX-21

Publication

No.

T.O.

31R2-4-101-1

T.O.

31R2-4-101-3

T.O.

31R2-4-101-4

SECTION I

DESCRIPTION

AND

LEADING PARTICULARS

1-1.

GENERAL.

1-2.

This

publication comprises service instructions

for

Radio

Receiver,

Model

SP-600-JX-21

(figure

1-1),

which is

manufactured

the

Hammarlund

Manufactur-

ing

Company, Inc.,

New

York

1-3.

Sections I

through

VII

this

handbook

apply

the rack

mounted

version

Radio

Receiver,

Model

SP-600-JX-21.

additional

models

become effective, they

will be covered

Section

VIII

the

use

Difference

Data

Sheets.

1-4.

PURPOSE

AND

LIMITATIONS.

1-5.

Radio Receiver,

Model

SP-600-JX-21, is amulti-

band

communications receiver designed

for

the

reception

A-M

radio

telephone,

cow

telegraph,

and

A-M

m-c-w

telegraph

signals

the frequency

range

0.54 mc

54.0 mc.

1-6.

The

receiver, designed

for

rtlOunting

astand-

ard

19-inch relay rack, consists

achassis

and

light

grey

front

panel

assembly

which

are

mounted

top

cover

and

bottom

plate.

intended

for

use

fixed

and/or

mobile

operations

such as those

enclosed base

stations,

aboard

ship,

aboard

aircraft, even

when

such

activities are subjected

wide

ranges

temperature

and

humidity.

The

receiver is

treated

with

fungicidal

varnish

condition

for

tropical use.

Its

design

and

shielding

reduce its

radiation

characteristics

amini-

mum,

thereby

complying

with

shipboard

regulations

and

enabling

the receiver

operated

proximity

other

station

equipment

multi-receiver installations.

suited to two-way operational activities and

may

disabled

the presence

strong

local carrier, by

means

the

"SEND/REC"

switch (21, figure

1-2).

1-7.

The

receiver is

the

superheterodyne

type.

utilizes six frequency

bands

for

the

continuously vari-

able, selective reception

any

signal

within

the

fre-

quency

range

0.54

54.0 me.

has provisions

for

fixed-channel crystal-controlled

operation

any

six

frequencies

within

the

range

0.75 mc

54.0 mc. In-

coming

signals are

converted

the

heterodyne

process

into

intermediate

frequency

455 kc. Single con-

version is used

for

signal frequencies

7.4 mc,

and

double

conversion is used

for

signal frequencies above

7.4 me.

1-8.

Various

connectors are

provided

the

front

and

rear

panels

facilitate use

with

avariety

signals,

such as

amplitude-modulated,

suppressed carrier, keyed

carrier,

and

frequency-shift types.

For

the

reception

radio

telephone

low-speed

(manual,

telegraph

sig-

nals, a

headset

plugged

the

"PHONES"

jack (20,

figure

1-2)

located

the

front

panel,

loud

speaker

is connected

the

"AUDIO

OUTPUT"

ter-

minals (8, figure

1-3)

the

rear

apron.

For

high-

speed

(automatic)

telegraph

operation,

the

receiver

doc

output

developed between

the

jumpered

"DIODE

OUT-

PUT"

terminals

(2,

figure

1-3)

and

chassis

ground,

may be used

operate

tape

ink

recorder,

the

re-

ceiver a-c

output

developed

the

"AUDIO

OUTPUT"

terminals may be used

operate

recorder

driving

unit

associated

with

the

tape

ink

recorder.

For

the

reception

frequency-shift teletype signals,

the

i-f

output

de-

veloped

the

"IF

OUTPUT"

connector

(6, figure

1-3)

the

a-f

output

developed

the

"AUDIO

OUTPUT"

terminals

may

used

operate

suitable frequency-

shift

converter

equipment.

For

the

reception

keyed-

carrier, single

two-tone carrier teletype,

the

a-f

output

Section

Paragraphs

1-9

1-11

T.O. 31R2-4-101-2

7 8

--9

---10

"XT

PHASING"

control

.2.

Tuning

meter

"METER"

switch

Main

tuning

dial

"MEGACYCLES"

window

Vernier

dial

FREQ"

control

"FREQ

CONTROL"

selector switch

9. Plastic

chart

10.

"BEAT

OSc."

control

11.

"AVC/MAN"

switch

12.

"RF

GAIN"

control

13.

"MOD/CW"

switch

14.

"TUNING

LOCK"

Figure

J-2.

Radio

Receiver,

Front

,Panel

View

15.

"TUNING"

control

16:

"AUDIO

GAIN"

control

17.

"BAND

CHANGE"

control

18.

"SELECTIVITY"

switch

19.

"LIMITER/OFF"

switch

20.

"PHONES"

jack

21.

"SEND/REC"

switch

developed

the

"AUDIO

OUTPUT"

terminals

may

used

operate

suitable

demodulator

equipment

associ-

ated

with

ateletype-writer.

1-9.

The

receiver self-contained stabilized

power

sup-

ply

is designed

operate

from

asingle phase 50-

60-cyde, a-c source.

The

power

transformer

primary

provided

with

taps

covering

aline

voltage

range

from

270 volts.

The

receiver is

protected

against

over-

load

fusing

the

power

transformer

primary

and

sec-

ondary

plate

windings.

The

primary

and

secondary fuses

used

are

contained

respectively

the

"LINE"

and

"-B"

fuse

holders

(11

and

1, figure

1-3)

the

rear

apron

the

receiver. Aduplicate

each

these fuses, com-

prising

the

receiver spare fuse

complement,

located

under

the

polystyrene

"SPARK

FUSES" cover

(10).

The

receiver ac

power

cord

(9)

can

connected directly

a-c

power

source.

1-10.

LEADING

PARTICULARS.

1-11.

The

receiver antenna system used

connected to

the

"ANT"

input

connector

(Jl,

figure

5-4).

The

re-

ceiver

input

impedance is designed

match

95-ohm

transmission line. A

straight

wire

balanced

doublet

antenna

system is used

with

the

receiver.

The

receiver

rotary

turret

houses

the

frequency

determining

r-f

tuner

subassemblies

that

are used

for

the

six frequency

bands

the

receiver. Each frequency

band

has

antenna,

two

identical

interstage

r-f

tuner

subassemblles

and

oscillator

r-f

tuner

subassembly.

The

"BAND

CHANGE"

control

(17, figure

1-2)

geared

the

rotary

turret

and

is used

select

the

frequency

band

desired.

may

turned

either

direction

and

requires

rotation

360 degrees

position

the

rotary

turret

adifferent

band.

indenting

mechanism

locKs

the

tuner

into

position

each

band.

The

band

indicator

dial

visible

through

the

"MEGACYCLES"

window

(5)

indicates

the

frequency

band

selected.

The

"BAND

CHANGE"

con-

trol

(17)

positions

the

movable

pointer

the

main

tun-

ing

dial

(4)

the

proper

frequency scale

the

dial.

The

main

dial

outer

scale is

arbitrarily

calibrated,

and

conjunction

with

the

vernier

dial

(6)

scale, provides a

continuous

vernier

scale

which

facilitates extremely accu-

rate

station

logging

and

receiver resettability.

T.O. 31R2-4-101-2 Section I

Paragraphs

1-12

1-14

_~--5

"-B"

fuse

"DIODE

OUTPUT"

terminals

VC"

terminals

"BFO

IN]"

control

"METER

AD]

RF"

control

"IF

OUTPUT"

connector

"METER

AD]

AF"

control

"AUDIO

OUTPUT"

terminals

Power

cord

10.

"SPARE

FUSES"

cover

11.

"LINE"

fuse

12.

"AC"

power

outlet

Figure

J-3.

Radio Receiver, Rear

View

1-12.

The

"TUNING"

control

(15,

figure

1-2)

is fly-

wheel balanced

provide

operating

ease.

high

trav-

erse speeds.

controls

both

the

main

and

vernier

dials.

antibacklash

gear

train

maintains

the

extremely close

calibration accuracy

and

provides

for

the

accurate re-

settability

the

receiver.

The

"TUNING

LOCK"

(14)

provides

locking

action

without

affecting

the

frequency

setting.

The

tuning

ratio

from

the

tuning

control

the

main

dial is 50

one

and

the

ratio

from

the

vernier

dial

the

main

dial is six

one.

1-13.

The

receiver circuitry available

for

single con-

version includes

two

stages

r-f

amplification, amixer,

heterodyne

oscillator,

four

stages

i-f amplification,

detector

and

an a-v-c rectifier, anoise

limiter

and

meter

rectifier, abeat-frequency oscillator, abeat-

frequency buffer amplifier, an i-f

output

stage,

a-f

amplifier,

and

an a-f

power

output

stage.

The

receiver

circuitry available

for

double

conversion does

not

in-

clude

the

initial

gate

stage

the

i-f amplifier used

for

single conversion,

but

includes asecond

mixer

and

second

heterodyne

crystal-controlled osciIIator.

The

re-

ceiver self-contained

power

supply system includes a

full-wave

power

rectifier

and

voltage

regulator,

and

full-wave bias rectifier.

1-14.

For

fixed-frequency crystal-controlled reception,

the

variable-frequency first

heterodyne

osciIIator is re-

placed by afixed-frequency crystal-controIIed osciIIator.

This

is accomplished

when

the

"FREQ

CONTROL"

se-

lector switch (8, figure

1-2)

is switched

from

its

"VFO"

one

its

"XT

ALS"

positions. Each

the

six

"XT

ALS"

positions is associated

with

acrystal

which

suited

the

frequency

the

operational

activity con-

templated.

The

small

plastic

chart

(9)

is used

record

the

applicable signal frequency

for

each

the

crystals.

For

crystal-controlled reception,

the

main

dial is set

the

signal frequency,

and

tuning

is accomplished

through

use

the

"/'::,

FREQ"

control

(7).

slight

tuning

ad-

justment

the

chosen

setting

the

"TUNING"

con-

trol

(15)

is desirable

resonate

the

r-f

section

the

signal.

Section 1

Paragraphs

1-15

1-22

T.O. 31R2-4-101-2

1-15.

The

frequency

control

unit

crystals,

per

Specifi-

cation

MIL-C-3098,

should

purchased

special

or-

der

Hammarlund

Specification

No.

31473.

The

oper-

ating

frequency

each crystal

for

single-conversion use,

and

including

7.4 me, is specified as

the

signal

frequency

plus

455 kc;

and

for

double-conversion

use,

from

7.4

12.0450 me,

is specified

the

signal

frequency

plus

3955 kc.

For

signal

frequencies

from

12.0450 to 54.0 me

the

third

harmonic

mode

oper-

ation

the

crystal is used.

The

crystal frequency speci-

fied is

the

signal

frequency

plus

3.955 me

divided

three.

The

allowable

frequency

tolerance

each

crystal

is 0.005

percent

frequency.

1-16.

When

the

"AVC/MAN"

switch

(11,

figure

1-2)

the

VC"

position

and

the

"RF

GAIN"

control

(12)

fully clockwise,

the

receiver

front-panel

dual-

scale

meter

provides

r-f

indication

the

relative

strength

the

received

signal

decibels

from

one

microvolt.

The

r-f

indication

used

for

tuning

when

ave.

When

the

spring-return

"METER"

switch

(3)

held

depressed

its

"AF"

position,

the

lower

scale

the

meter

indicates

the

receiver

audio

output

power

level

decibels

from

six

milliwatts

standard

reference

out-

put.

1-17.

The

receiver

provides

a-v-c

action

when

the

VC/MAN"

switch is

its

VC"

position.

The

re-

ceiver

gain

maintained

dependent

the

setting

the

"RF

GAIN"

control.

For

normal

keyed

carrier

re-

ception,

the

receiver

"BEAT

OSc."

control

(10,

figure

1-2)

may

be set

provide

receiver

single-tone

output

any

pitch

within

the

range

plus

minus

three

from

zero

tone

output.

For

frequency-shift reception,

the

two-tone

receiver

output

provided

dependent

the

setting

chosen

for

the

control

and

the

carrier

frequency-shift.

1-18.

The

receiver

provides

effective a-v-c action as

long

the

rate

signal

fading

does

not

approach

the

signal

speeds used.

Two

different

a-v-c

networks

are

provided.

When

the

"MOD/CW"

switch

(13)

the

"cw"

position

long

time-constant

network

is used;

the

"MOD"

position,

short

time-constant

network

used.

The

"AVC"

terminals

(t,

figure

1-3),

when

in-

terconnected

between

receivers

aspace diversity re-

ceiving system,

enable

the

receiver

with

the

larger

signal

input

control

the

gain

the

receiver

with

the

smaller

signal

input.

1-19.

The

receiver

"SELECTIVITY"

switch

(18,

figure

1-2)

provides

achoice

anyone

six degrees

receiver selectivity,

the

three

narrower

"SHARP"

band-

widths

being

realized

through

use

acrystal filter

which

forms

part

the

i-f section

the

receiver.

With

the

"SELECTIVITY"

switch

anyone

its

"SHARP"

positions,

the

crystal filter

"XT

AI.

PHASING"

control

provides

for

attenuation

heterodyne

interference,

even

when

the

unwanted

signal

is closely

adjacent

the

de-

sired

signal.

1-20.

CONDENSED FACTUAL DATA.

1-21.

TUBE

COMPLEMENT.

The

tube

complement

the

receiver is

shown

table

The

table

identifies each

the

electron

tubes by

JAN-type

designation,

circuit

reference symbol

and

circuit

function.

1-22.

FUSE

COMPLEMENT.

The

fuse

complement

the

receiver

(table

II) consists

two

fuses

and

spare

for

each. Each fuse is glass-enclosed,

indicating,

and

com-

mercially available.

The

%-ampere

fuse is

the

in-

stantaneous

type

and

the

1.6-ampere fuse is

the

slow-

blow

time-delay type.

The

table

identifies each fuse

Bussman

Manufacturing

Company

part

number,

ampere

rating,

circuit reference symbol,

and

type.

JAN

Type

Qty

5749/6BA6W

6C4

6AC7

6BE6

S726/6AL5/6097

12AU7

6V6GT

SR4GY

OA2

TABLE

TUBE

COMPLEMENT

Function

Amplifiers: r-f, i-f, b-f-o buffer

Oscillators:

variable

frequency, 3.5-mc,

bfo

Oscillator, fixed

frequency

Mixers: first,

second

Detector

and

ave;

limiter

and

meter;

bias

rectifier

Cathode

follower

and

first

audio

Audio

power

output

Rectifier

Voltage

regulator

Reference Symbol

VI,

V2, V7,

V9,

V1O,

Vll,

V12

V4,

V8,

V5,

VI4A,

VI5A,

V20

V16

V17

V19

V18

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