Hallicrafters S-40 User Manual

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Recerver Modiil S-40, front

Rodio

view,

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INSTALTATION

AND

INSTRUCTIONS

FOR

RADIO

RECEIVER MODEL

OPERATING

S.4O

GENERAL.-YouI receiver is
pable
fiequency

(megacycles). A
indicated
as
venient
tuning dial scale
radio
of
reception such as automatic
the optional
code
enthusiast.

The
quires
prong plug which is attached
On
power such as a 6-volt storage battery

Another socket
ternal

receiving

of

ranges

on the attractively illuminated

foreign

which

the

station

reference

stations. A band spread

is

signals

receiver is designed to operate from a 105 to

watts of

75

rear

"S"

tuning

standard

continuous

with

bandswitch is provided for selecting the four ranges

locations

radio

for

is

also located a logging scale which

described later

use

of the

a headset. A beat

of

intelligible, this feature being especially

power for

receiver chassis

is

provided on

meter which

a table

broadcast

are also clearly
amateurs

dial is provided

in

these

noise limiter and volume control.

operation.

to

is available upon

model,

and foreign

coverage

(hams)

instructions.

frequency

six foot line cord extending

the

is

provided
and

the rear of the

nine tube superheterodyne radio

domestic short wave stations over

or

provided from

main

tuning dial scale. The

indicated

and also the short wave listener. On

for fine

Connection

"8"

on the

is used as a reference when

tuning of short wave stations,

Special

oscillator

125-volt, a-c,

a socket for

batteries

receiver chassis

request from a Hallicrafter distributor.

features are provided to

(b.f.o) is

useful to the

to the power source

or vibrapack.

kc (kilocycles) to 43

54O

of

amateur

main

tuning dial

Provision is made for

provided for

radio

6O cycle source

5Of

from the rear of

connecting to a d-c source of

for

the

receiver ca-

reception which

bands

scale as a con-

amateur

is made by the two

connection of

as well

the

logging

the

improve

rendering

and code

and

the cabinet.

an ex-

four

mc
are

main

use

re-

The complete

receiver

is 9 inches high by

28 pounds.

maximum output of

The

distortion.

MECHANICAL

ventilated

well
mechanical strength.
provides
ments. Mixer and oscillator
the
near
for
control

ELECTRICAL

receiver circuits
up at
is selected by

a means of gaining

holes provided

the front of the cabinet

tuning and operating

markings are

the anrenna

DESCRIPTION.-The

aerodized sheet

DESCRIPTION.-The block

in a simple

and fed to the

a resonant

the

The full length aerodized

for

this

in red. This

circuit and

18[

receiver at

metal

access to all of

adjustments

purpose

provide access to the

are located on the

manner which

antenna coil of

the

model S-40

cabinet

may

under the

is

aid the

to

fed to the

is described

inches

spqaker

minimize electrical

to

top

the tubes,

made

be

notice card.

front of

novice

diagram,

the

mixer-oscillator

wide by

is one watt with

radio receiver

cover,

Jiz.l lamps and

from the

Three small

oscillator

receiver. Notice that some

the

in

operating

Figure

follows: radio signals

as

r-f

stage

11 inches deep

less than ten

is

housed

interference and

mounted

bottom

padder

2, iilustrates the

where the

on

i-f transformer

of the cabinet

holes

adjustments.

receiver.

the

desired station

tube.

in

an

a piano

on

All controls

function of the

and weighs

Percent

attractive,

provide

type hinge,

adjust-

through

the bottom

of the

picked

are

signal

V

Figure l.

At

the same time
which
of
stages
component
fier tube and then capacity
and fed to the speaker.

Thb a-v-c circuit
voice (phone) broadcasts.

The
provides ant-f. signal
the
be
cycles.

The automatic
other
trolled

is mixed

kc (kilocycles) is

455

to the detector-first

of the

frequency oscillator

beat

i-f

signal,

varied

diode being

means

by

in the event that

Rodio Receiver Model *4O,

the

oscillator

with the selected

selected by

i-f

signal

coupled to the audio

is a conventional one

at455

thereby

noise limiter

rendering code signals

the C\(-PITCH

of

used as

an electronic

any one or

block

mixer-oscillator tube generates

section of

incoming station signal.

audio

is amplified by the

It

amplifier

is in

use with

stage operates

kc (kilocycles) which

circuit

the

first i-f

the

stage

which

the

in

control

employs one

bleeder

all of these

diogrom

transformer

where

triode section

power output

provides stability

AM/C\/ switch

the CV

is fed to the

intelligible. The

which

diode of

(gas-gate)

tubes

showing

An intermediate

and fed through

it is then

of the
tube where

position

permits

a duo-diode
for the tubes which

should become

receiver circuils.

a local r-f signal

frequency signal

two i-f amplifier

demodulated.

detector-first audio

is

it

further

listening to

when

position.

AM

at the

AM/C\/ switch

the

of

detector stage

pitch of the

a variation

gassy.

to beat

code signal

from 0 to

type tube

The

amplified

music or

against

(6H6)' the

a-v-c con-

are

audio

ampli-

and

can

1'000

-sF

V

power

A

circuits

rectifier

when

stage

the r'eceiver

INSTALTATION

As soon as the

L.
might have occurred
the transportation

damages
dealer.
possible

Z.
structions.

are apparent

Ifpurchased

defects,

Eill our and

receiver

BEFORE

immediately

provides a well

is operated

has

in

shipment.

company.

the

after

"unpacked"

ACCEPTANCE.

mail the

filtered

from an a-c

OF

unpacked,

been

If any

purchased

If

receiver has been

over

damages are

packed

the counter, examind

record

high voltage to

source

return card which

of

source.

THE

examine

found,

"oyer

unpacked,

RECEIVER

it for any apParent

a claim

file

the counter"

return

carefully

plate and

the

damage wb.ich

IMMEDIATELY

any

and

it IMMEDIATELY

and thoroughly

is enclosed with

screen

with

defects or

to the

for any

in'

these

a

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