Hallicrafters SX-62A, SX-62AU Operating And Service Instructions

GENERAL

SPECIFICATIONS

Tubes

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

Fourteen

plus

v 0

It

age

regulator

and

rectifier

FREQUENCY COVERAGE

Speaker

Output

..........

3.2/8/500

Headset

Output

..........

High

impedance

Antenna Input. . . . . . . . . . .

For

50

to

600 ohm

line

or

single

wire

lead

-in

Phono

Input.

. . . . . . . .

.•.

High

impedance

External

Power

Connector

..

Std.

octal

socket

Tuning Range

..........

See

Frequency

Coverage

Intermediate

Frequency

Bands

1, 2, 3, 4 . . . .

...

455

KC

Bands

5, 6

...........

10.7

MC

Power

Supply

...

SX-62A 105-125V

50/60

Cycles

AC

SX-62AU 105-250V

25/100

Cycles

AC

Power

Consumption

......

120

Watts

BAND

1
2
3
4
5
6

FREQUENCY

TYPE

OF

RANGE

RECEPTION

540

KC

- 1620

KC

AM/CW

1.62

MC

-

4.9

MC

AM/CW

4.9

MC

-

15

MC

AM/CW

15

MC

-

32

MC

AM/CW

27

MC

-

56

MC

AM/FM/CW

54

MC

-

109

MC

AM/FM/CW

The Model SX-62A/62AU

is a sensitive

high fidelity

superheterodyne

receiver

covering

all

of the

broadcast-

ing

services

between 540

kilocycles

(KC) and 109

megacycles

(MC). The

receiver

is

capable

of

receiving

both the

FM

(Frequency

Modulation) and

AM

(Amplitude Modulation)

broadcasts

transmitted

in

this

frequency

range

as

shown

in

the

FREQUENCY COVERAGE

chart.

A

built-in

500 kc

crystal

controlled

calibrating

oscillator

and

adjustable

dial

pointer

permit

accurate

dial

calibra-

tion

on

the

large

direct

reading

slide

rule

dial.

Marker

signals

appear

every

500 kc on the dial

scale

with

this

type

of

marker

oscillator;

hence,

dial

calibration

may

be

held to

very

close

limits

over

the

entire

dial

scale

by

comparison

with the

marker

signal.

This

calibration

feature

of

the

receiver

makes

it

possible

to

log

the

most

prominent

shortwave

stations

by

countries

directly

on the

dial.

In addition, many of

the

active

communication

channels;

government,

amateur,

police,

aviation,

etc.

are

logged by

bars

to

indicate

their

location

on

the

dial.

World-wide

reception

is

accomplished

simply

by

selecting

the

desired

frequency

band (band

selector

switch) and

adjusting

the

tuning

control

so

that

the

pOinter

is

above

the

station

locating

dot.

The

receiver

selectivity

is

adjustable

to

accommodate

the

broad

response

required

for

high

fidelity

FM and

AM

broadcast

reception

to

the

sharpest

crystal

selectivity

required

for

code

reception

in the

crowded

channels

of the

short

wave

bands.

The

high fidelity tone

compensated

audio

system

provides

four

distinct

tone

ranges

covering

full

range

reception

for

entertainment

purposes

as

well

as

the

restricted

range

required

for

communication

work

in

either

voice

or

code.

An

automatic

noise

limiter,

operated

by a toggle switch,

permits

the

operator

to

reduce

the

background

noise

caused

by

severe

electrical

distrubances.

Background

noise

is

reduced

in

the

receiver

with a

minimum

of

audio

distortion.

A RECEIVE-STANDBY

switch

permits

receiver

disabling

for

short

standby

periods

without having to

wait

for

the

tube

heaters

to

reach

operation

temperature

when

reception

is

again

required.

The SX-62A

operates

from

a 105-125 volt

50/60

cycle

alternating

current

(AC)

source. A connector

for

operating

the

receiver

with

external

batteries

or

equivalent

power

is

provided

to

permit

operation

in

areas

where

AC

current

does

not

exist.

The

universal

model,

the

SX-62AU,

permits

operation

from

25

to

100

cycle

alternating

current

sources

operating

at

voltages

ranging

from

105-250

volts.

The

power

requirements

for

your

receiver

must

be

checked

carefully.

Read

over

the

installation

section

of

this

book

before

connecting

to

your

power

source.

IMPORTANT

Your

careful

attention

is

especially

invited

to

the

installation

and

operating

instructions.

They have

been

provided

to

insure

the

satisfaction

you

have a right

to

expect

from a Hallicrafters

"Precision

Built"

product.

Your

receiver

has

an

unusually

high

degree

of

sensitivity

necessary

to

receive

weak

and

distant

stations.

Careless

operation

of a high

sensitivity

receiver

may

result

in

excess

noise

or

background

hiss.

These

undesirable

effects

can

be

held

to a mini-

mum

by

careful

adjustment

of

the

sensitivity,

tuning and

tone

controls

as

well

as

proper

selection

and

arrangement

of

the

antenna.

Page

3

INSTALLATION·

UNPACKING - Check

all

shipping

instruction

tags

carefully

before

removing

them.

LOCATION - The

receiver

is

equipped with

rubber

feet

for

table

top

or

shelf

mounting. When locating the

receiver,

avoid

excessively

warm

locations

such

as

near

radiators,

hot

air

registers,

or

confined dead

air

spaces

such

as

are

encountered

in

recessed

installations.

POWER SOURCE - Two types of

power

sources

may

be

used

to

operate

the

receiver.

The

receiver

may

be

operated

directly

from

an

AC

source

or

indirectly

from a battery

or

DC

source

as

follows:

AC

operation

- The SX-62A

receiver

operates

from

a 105

to

125 volt,

50/60

cycle

AC

outlet.

Power

consumption

is

approximately

120

watts.

If you

are

in doubt

or

unfamiliar

with

the

voltage and

frequency

rating

of

your

utility

service,

consult

your

local

power

company

representative.

Attempting

to

operate

the

receiver

from

other

sources

of

power

than

specified

may

involve

costly

repairs.

The

universal

model, the SX-62AU,

operates

on 115

V'/130 V'/150

V./220

V./250

V.

25/100

cycle

AC

sources.

A

selector

switch

on the

power

transformer

permits

operation

on any of

the

line

voltages

shown.

VIBRAPACK

BATTERIES

B-

SWITCH

8+

270

VOLTS

SWITCH

PL

1111

11111111

6 VOLTS

+

+

+

"A'

"B"

F

i~.

2.

Wirin~

dia~rams,

DC

power

pZu~.

928520

CAUTION - When

operating

the

universal

model,

it

is

necessary

to

check,

and

set

if

necessary,

the

selector

switch

on

the power

transformer

before

connecting

the

receiver

to

the

source

of power.

Note - The

receiver

will not

operate

from

an

AC

source

unless

the

jumper

plug

is

located

in

its

BATTERY POWER

receptacle.

See

Fig.

3.

DC

Operation

- The

receiver

may

be

operated

from a 6-volt

DC

source

(storage

battery

or

equal) and a 270-volt

DC

supply in

the

form

of liB"

batteries,

vibrator

power pack,

or

motor

generator

set.

The

DC

source

must

be

capable

of supplying the following

voltages

and

currents

for

optimum

results.

fiB

II

voltage

...........

.

"B"

current

...........

.

Heater

voltage

........

.

Heater

current

. . . . . . . . . .

270 Volts

150

Milliamperes

6.3 Volts
5

Amperes

Total

current

drain,

when

operating

entirely

from a storage

battery,

will

run

approximately

15

to

20

amperes.

DC

power

is

connected

to

the

receiver

through

the

octal

socket

located

on

the

rear

apron

of

the

chassis.

The

jumper

plug

normally

in

this

socket

for

AC

operation

is

replaced

with a

standard

octal

plug

for

DC

operation.

Wire

the

octal

plug

for

DC

operation

as

shown in

Fig.

2.

SPEAKER CONNECTION - A

four-terminal

strip,

marked

"COM-3.2-8.0-500"

is

provided

at

the

rear

of

the

re-

ceiver

for

speaker

connections. Any

speaker

having

an

impedance of 3.2

or 8 ohms

can

be

used

with

the

receiver

by

connecting one

lead

from

the

speaker

to

the

common

ground

terminal

marked

"COM" and

the

other

lead

to

the

terminal

which

corresponds

to

the

speaker

impedance. When

using a speaker

with

an

impedance

other

than

3.2

or 8 ohms,

a

matching

transformer

should

be

used

to

insure

optimum

performance.

The matching

transformer

should have a

10-

watt

power

rating,

a 500-ohm

primary

impedance, and a

secondary

impedance

to

match

the

impedance of

the

speaker

being

used.

The

transformer

should

be

mounted on

or

near

the

speaker.

Connect

the

primary

of

transformer

to

the

terminals

marked

"500" and "COM" and

the

secondary

to

the

speaker

voice

coil.

The

Hallicrafters

R-46

and R-46A

speakers

are

both

designed

for

use

with

your

receiver.

The

R-46

speaker

connects

to

the

terminals

marked

"500"

and "COM";

the

R-46A

speaker

connects

to

the

terminals

marked

"3.2"

and "G".

Page

4

COM

3.2 8.0

IlOO

PHONO

O©O

LICENSE PLATE

th.holllc:roften

CII.

CHICAGO

u.s.A.

o

SE:;:'L

IHA-

I

JUMPER

PLUG

(AC

OPERATION)

OR

RECEPTACLE

FOR

EXTERNAL

DC

SUPPLY.

PHONO

INPUT

CONNECTOR

Fi~.

3.

Rear

view.

o

o

AI

A~

I

GND

ANTENNA TERMINAL

STRIP

92D521-A

RECORD PLAYER CONNECTION - A phono

jack

is

provided

at

the

rear

of

your

receiver

for

attaching a record

player.

(See Fig. 3.) Any

record

player

using a crystal

pickup,

or

a magnetic pickup with a

suitable

pre-amplifier,

will

pro-

vide

satisfactory

results.

For

phono operation,

insert

the

pin-plug

from

the

record

player

or

pre-amplifier

into

the

phono jack,

set

the

RECEPTION

control

at

"PHONO",

set

the

RECEIVE-STANDBY

switch

at

"RECEIVE", and

adjust

the

VOLUME and TONE

controls

as

desired.

The

remaining

controls

are

inoperative

and

will

have no effect on phono

operation.
ANTENNAS -

The

r-f

input of

the

receiver

is

designed

to

operate

from

either a single-wire

antenna,

or

a half-wave

doublet

or

other

tuned

antenna

employing a 50

to

600 ohm

transmission

line. Antenna connections

are

made

to a three-

terminal

strip

at

the

rear

of

the

receiver

marked

"A1 ", "A2", and "GND".

Single-Wire

Antenna.

The

simplest

antenna and one

which

will

provide

satisfactory

performance

throughout

the

entire

tuning

range

is

a conventional

Single-wire

antenna. In

most

localities,

satisfactory

results

can

be

obtained with

just

the 15-foot

antenna

wire

included with

the

receiver.

Simply

attach

one end of

this

wire

to

ter-

minal

"A1", connect the

jumper

wire

between "A2" and

"GND", and

run

the

wire

about

the

room

in

any

con-

venient

manner.

(See

Fig.

4.)

H

the

receiver

is

operated

in a

steel

constructed

building

or

where

receiving

conditions

are

exceptionally

poor,

an

outside antenna

50

to

100

feet

long

may

be

nec-

essary.

In

some

locations,

reception

may

be

improved

by

connecting a ground

wire

(ordinary

copper

wire)

from

the

terminal

marked

"G

ND"

to

a cold

water

pipe

or

outside

ground

rod.

Half-Wave Doublet Antenna.

For

top

performance,

especially

on the

shortwave

and

amateur

bands,

the

use

of a

half-wave

doublet

or

other

type of antenna employing

a

50

to

600 ohm

transmission

line

is

·recommended. A

typical

doublet antenna

installation

is

shown in Fig. 5.

The

doublet antenna should

be

cut

to

the

proper

length

for

the

most

used

frequency

or

band

of

frequencies.

The

overall

length in

feet

of a doublet

antenna

is

determined

by

the

following

formula:

Length in

feet

=

468

Frequency

in

megacycles

For

maximum

signal

pickup,

the

doublet

antenna

should

be

erected

with

its

length

at

right

angles

to

the

desired

station.

-

over

-

Fi~.

4.

Sin~le

lIire

Antenna

1-1

~.

---

L

(FEET)'

----;F""'REQ;;;i;~:~N8C;;-y

"(M""'C)'----

---~·-11

NOTE

SOLOERALL

JOINTS

Ft~.

5.

INSULATOR

Doublet Antenna

usin~

Twin-Lead Transmission Line

92B2~03

o

92D2~O~

Page

5