Hallicrafters S-38C Training manual

the

hallicrafters

co.

MANUFACTURERS

OF

ELECTRONIC

FQUIPMENT,

CHICAGO

24,

U.

5.

a.

GENERAL

DESCRIPTION

World-wide

radio

reception

is

yours

with

the

Hallicrafters

Model

5-38C

‘This

5

tube

communications

receiver

tunes

from

540

kilo-

cycles

to

$2

megacycies

to

bring

you

standard

broadeast

programs,

foreign

and

domestic

shortwave

broadcasts,

amateurs,

police,

ships,

aireraft

and

countless

ather

exeiting

distant

stations.

It

receives

both

voice

and

code

broad-

easts

and

is

designed

to

operate

from

105

to

125

volt

direct

current

(DC)

or

40

cycles

alter

-

nating

cerrent

{AC),

A

5-inch Alnico

¥

perman-

ent

magnet

speaker

is

built

into

the

top

of

the

cabinet

and

tip

jacks

have

been

provided

on

the

back

of

the

set

for

plugging

in

a

pair

of

head-

phones.

The

RECEIVE-STANDBY

switch

on

the

front

panel

is

a

special

feature

which

permits

you

to

silence

the

receiver

without

turning

the

set

off.

:

Hollicratiars

Mode!

5C-38¢

Good

receptiun

of

bath

standard

and

shortwave

broadcasts

can

be

obtained

in

most

localities

with

the

15

fact

antenna

wire

included

with

your

recelyer.

it

is

merely

necessary

to

uncoil

this

wire,

connect

one

end

of

if

to

lerminal

Aton

the

bark

of

the set

and

then

run

it

about

the

room

in

any

convenient

manner.

To

complete

the

antenna

Installation,

connect

the

jumper

between

terminals

42

and

G.

Your

set

is

provided

with

two

tuning

knobs

for

greater

ease

of

tuning.

Wide

tuning

ia

done

with

the

knob

marked

TENING

and

fine

tuning

with

the

knob

marked

BAND

SPREAD.

The

BAND

SPREAD

knob

permits

you

to

accurately

tune

in

stations

on

crowded

bands

by

spreading

them

out

so

that

they

may

be

more

easily

separated.

In

this

way

you

are

able

to

hear

many

more

stations

than

you

would

on

an

ordinary

radio

with

just

one

tuning

knab.

The

amateur

bands

and

principal

shortwave

channels

of

the

world

are

clearly

marked

on

the

dial

for

your

conven-

ience.

Since

shortwave

conditions

vary

with

the

season

of

the

year

and

even

with

the

time

of

day,

shortwave

pragrams

may

nat

be

heard

with

the

same

regularity

as

standard

broadcasts.

A

special

table

has

been

provided

on

page

3

to

aid

you

in

determining

the

most

favorable

times

for

shortwave

Listening.

IMPORTANT

Your

careful

attention

is

especially

invited

to

the

installation

and

operating

instructions.

They

have

been

pravided

to

ingure

the

satisfaction

you

have

a

right

to

expect

from

a

Hallicratters

“Precision

Built’

product.

Your

receiver

hav

an

unusuaily

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

bv

careful

adiustment

of

the

tuning

controls

as

well

as

the

proper

selection

and

arrangement

of

the

antenna.

INSTALLATION

INSTRUCTIONS

ANTENNA

-

The

terminals

marked

Al,

A2

nnd

G

on

the

back

of

the

set

are

for

antenna

and

ground

connections.

Good

results

can

be

obtained

in

most

localities

with

the

15

foot

antenna

wire

included

with

your

receiver.

This

wire

should

be

uncoiled

to

provide

maximum

signal

pickup.

An

outside

antenna

50

to

100

feet

long

(ordinary

copper

wire)

may

be

necessary

if

the

receiver

is

operated

in

a

dif-

ficult

reeeptinn

area

or

steel

constructed

building.

Connect

the

antenna

wire

to

terminal

Al

on

the

back

of

the set

and

then

connect

the

jumper

between

terminalis

A2

and

G.

In

some

iocalions,

recep-

tion

may

be

improved

by

counecting

a

lead

from

terminal

G

to

a

cold

water

pipe

or

outside

ground

rod.

For

really

top

performance,

there

is

no

substitute

for

an

outside

antenna

such

as

used

by

the

commercial

radio

stations.

Provision

has

been

made

on

your

receiver

for

the

connection

of

Ehis

type

of

antenna,

commonly

called

a

doublet.

When

a

doublet

antenna

is

used,

the

jumper

is

removed

and

the

antenna

is

connected

to

terminalis

Al

and

A2.

Consult

your

radio

dealer

for

further

information.

Fig.

1.

Rear

View

of

Receiver

Showing

Antenne

and

Ground

Terminals

JUMPER

ANTENNA

WIRE

Page

Z

OPERATING

INSTRUCTIONS

TUNING

DIAL

-

All

dial

readings

are

in

Inegacycles,

To

convert

the

readings

on

the

standard

broadcast

band

(band

1}

to

kiloeyeles,

simply

remove

the

dot

and

add

two

zeros;

thus,

.7

on

the

dial

corresponds

to

700

kilocycles,

AM-CW

SWITCH

-

Set

this

switch

at

AM

to

listen

to

voice

and

musical

broadeasta.

Set

it

at

CW

oculy

if

you

wish

ta

hear

code

signals.

SPEAKER-PHONES

SWITCH

~

For

operation

of

the

built-in

Speaker,

set

the

switch

at

SPEAKER.

Tip

jacks

are

provided

an

the

back

of

the

set

for

plugging

in

a

pair

of

headphones,

Use

any

500

te

5000

ohm

headphones.

For

headphone

operation

set

the

switch

at

PHONES.

BAND

SELECTOR

CONTROL-

Set

this

control

for

the

hand

you

wish

to

tune.

VOLUME

CONTROL

~

Turn

this

cuurel

clockwise

to

turn

the

set

on.

Allow

about

30

seconds

for

the

tubes

to

reach

operating

temperature

and

then

advance

the

control

to

increase

volume.

To

turn

the

set

off,

turn

this

control

counter~

clockwise

until

a

click

is

heard.

NOTE

-

If

the

receiver

does

not

operate

after

the

30

second

warn

up

wher

connected

to

a

DC

source,

the

power

plug

should

be

reversed

in

the

wail

outlet

to

oh—

tain

proper

polarity.

RECEIVE

-

STANDBY

SWITCH

-

Set

this

switch

at

RECEIVE

for

radio

reception.

If

you

wish

to

silence

the

receiver

without

turning

the

set

off,

set

the

switch

at

STANDBY.

To

resume

radio

reception,

simply

raturn

the

switch

to

the

RECEIVE

position.

TUNING

KNOB

-

Your

receiver

has

been

provided

with

two

tuning

knobs

~

The

TUNING

knob

which

operates

the

pointer

on

the

left

hand

dial

and

a

separate

BAND

SPREAD

knob

which

operates

the

pointer

on

the

right

hand

dial,

The

TUNING

knob

is

for

wide

tuning

and

the

BAND

SPREAD

knob

for

fine

tuning,

Use

the

TUNING

knob

to

tune

in

the

desired

station,

Tune

for the

clearest

and

strongest

Signal.

If

the

signal

is

too

strong,

reduce

it

by

means

of

the

VOLUME

control,

not

by

using

the

TUNING

knob.

For

epde

receptton,

adjust

the

TUNING

kneb

for

the

desired

pitch

of

the

CW

code

signal

when

tuning

in

the

stakion,

IMPORTANT

-

The

dial

readings

will

correspond

to

the

exact

station

frequencies

only

if

the

BAND

SPREAD

dial

pointer

is

set

at

0.

BAND

SPREAD

KNOB

-

The

BAND

SPREAD

knob

permits

you

to

accurately

tune

in

stations

on

crowded

bands

by

spreading

them

oui

so

that

they

can

be

more

easily

separated.

The

BAND

SPREAD

knob

can

be

used

in

two

different

ways.

First,

it

may

be

left

with

the

pointer

at

5

while

you

partially

inne

in

the

desired

station

with

the

TUNING

knob.

Then,

by

"rocking"

the

BAND

SPREAD

knob back

and

forth

(turn

it

a

few

degrees

to

the

left

and

right

throngh

the

desired

station),

you

witl

be

able

to

tune

in

the

desired

station

with

precision

accuracy.

The

second

way

to

operate

the

BAND

SPREAD

knob

is

to

use

it

to

cover

a

group

of

stations.

Set

the

BAND

SPREAD

knob

so

that

the

pointer

reads

0

and

then turn

the

TUKING

knob

to

tune

in

the

highest

frequency

station

in

the

group.

The

other

stations

can

be

heard

by

slowly

turning

the

BAND

SPREAD

inob

from

6

to

100.

BEST

SHORTWAVE

RECEPTION

TABLE

Band Most

Favaroble

Time

Most

Favorable

Distance

6-7

MC

Night

-

Winter

Day

~

400

Miles

-

Night

~

Over

1560

Miles

9-10

MC!

Day

~

Late

Afternaon

and

Night

-

Winter

Over

500

Miles

11-12

MC;

Evenings

or

Late

Summer

Afternoons

Day

-

Under

1500

Miles

Night

-

a

1500

Miles

15-18

MC;

Karly

Mornings

and

Summer

Evenings

Over

1500

Miles

Page

3

SERVICE

INSTRUCTIONS

iH

=

GENERAL

SPECIFICATIONS

TURING

BANDSPREAD

Tubes

.....+:.-

.

&

incinding

L

rectifier

Speaker...

...-.00000-

...

Smch

PM

PEEst

oAKS

Voice

Coil

Impedance....--..

3.2

ohms

tA

8

Headphone

Gutput

Impedance...

15

ohms

*

Antenna...

Terminals

for

single

wire

or

doublet

antenna.

(See

Page

2.)

22

TURNS

Intermediate

Frequency

......,

455

KC

Frequency

Coverage

...

&40

KC

-

32

MC

3

.

Power

Supply

.....

105-125

volts

DC

or

LENGTH

#18"

LENGTHeIS

80

cycles

AC

Power

Consumplion....-...-.

30

waits

TUNING

GAPAGITOR

FULLY

CLOSED

[

BOTH

SECTIONS}

FRONT

VIEW

ty

22

TURNS

Fig.

2,

Dial

Card

Stringing

Diagram

2ND

IF

°

DIAL

CORD

STRINGING

-

Refer

to

Fig,

2

Byroe

for the

stringing

diagram.

Both

sections

of

G

_

IST

IF

the

tuning

gang

should

be

fully

meshed.

‘on

To

restring

the

TUNING

dial

cord,

tie

one

el

fa

end

of

an

18

inch

length

of

20

tb,

dial

cord

to

the

dial

spring

at

1

on

the

drive

pulley,

Follow

the

stringing

sequence

i

through

4,

At

4,

stretch

the

spring

and

tie

the

cord

securely

to

the

spring.

Cut

off

the

excess

cord

and

apply

a

drop

of

quick

drying

cement

to

the

knot.

To

resiring

the

BAND

SPREAD

dial

cord,

cut

a

15

inch

length

of

dial

cord

and

follow

the

procedure

as

explained

above,

starting

at

A

and

proceeding

through

D.

Fig,

3.

Tap

View

of

Chassis

Showing

Locatian

of

Alignment

Adjustments,

Tubes

and

Dial

Lamp

TUBE

AND

BIAL

LAMP

REPLACEMENT

-

Refer

to

Fig.

3

ior

the

focation

of

the

tabes

and

dial

lamp

used

In

the

receiver.

To

fain

access

to

the

tubes

and

lamp,

remove

the

hack

coyer

from

the

cahinet.

Before

attempting

ta

make

any

replacement,

set

the

BAND

SPREAD

control

fully

clockwise

and

the

TUNING

control

fully

counterclock-

wise

to

prevent

damage

to

the

tuning

gang.

Ta

replace

a

tube,

insert

the

center

guide

pm

into

the

center

hole

of

the

tube

socket,

rotate

the

tube

ontil

the

key

drops

into

BANDA

BANDE

BAND

2

position

and

ther

push

down

until

the

tube

is

Santa

ae

=

.

held

firmly

in

the

socket.

To

make

a

dial

—

aan:

¢

BAND

4

‘

lamp

replacement,

remove

the

dial

lamp

4

edt

SY

}

sockei

by

compressing

the

side

springs.

=

“=

;

Make

replacement

only

with

a

type

47

|

a

pot

lamp.

i!

Fig.

4,

Battom

View

of

Chassis

Showing

Location

of

Allgament

Adjustments

Page

4

ALIGNMENT

INSTRUCTIONS

|

®

Use

an

amplitude

modulated

generator

covering

455

KC

to

30

MC.

Use

a

modulated

output

for

every

step

except

Step

2.

2O00MME

20

UH

*®

Connect

output

meter

across

speaker

voice

coil.

o—_

*

Wse

a

non-metallic

alignment

tool.

|

*

Set the

AM/CW

switch

at

AM,

(except

for

BFO

adjustment},

Lie

AAA

|

SPEAKER/PHONES

switch

at

SPEAKER,

VOLUME

control

at

maxi-

mum,

RECEIVE/STANDBY

switch

at

RECEIVE

and

the

BAND

Mes

SPREAD

control

at

0.

*

See

Flgs.

3

and

4

far

location

of

alignment

adjustments,

Fig.

5,

RMA

Dummy

Aatenne

Recelver

Generotor

Frequency

Signal

Generator

Connections

A,

B,

C

and

DB

for

maximum

output,

Keep

raducing

gen.

output

sa

that

the

reading

on

the

output

meter

does

not

exceed

50

milliwatts

High

side thru

a

.01

mfd.

capacitor

ta

stator

plates

of

front

section

of

TUNING

gang.

Low

side

to

chassis.

BFO

ADJUSTMENT

Set

the

AM/CW

switch

at

CW.

(Re-!

set

the

switch

at

AM

when

Step

2

is

campleted.)

For

correct

AFO

op-

eration,

vary

the

coupling

between

lead

E

and

pins

4

and

§

of

the

128G7

tube

for

a

maximum

heat

note,

Pushing

lead

E

toward

4

in-

creases

the

strength

of

the

beat.

*3

|Same

as

Step

1.

415

KC

i

(No

Mod.)

RF

ALIGNMENT

30

Mc

4

30

MC

Fand

G

for

maximum

output

as

in

Step

1,

High

side

thru

RMA

dummy

antenna

(Fig.

5)

to

terminal

Al

on

back

of

chassis,

Low

side

to

chassis.

Connect

jumper

between

A2

and

G,

H

and

J

for

maximum

output

ag

ln

Step

i.

Same

as

Step

3.

14

MC

K

and

L

for

maximum

output

as

in

Step

1.

Same

as

Step

3.

Mand

N

for

maximum

output

as

In

Step

1.

500

KC

1

6

MC

|

P

for

maximum

output

as

in

Step

1.

*

Step

2

is

usually

unnecessary.

Adjustment

should

be

made

ONLY

if

a

weak

beat nate

is

obtained

on

strong

CW

signals

indicating

lack

of

coupling

between

wire

lead

E

and

pins

4

and

8

of

the

125G7.

Same

as

Step

¢.

SERVICE

OR

OPERATING QUESTIONS

-

Far

further

information

regarting

opera-

tion

or

servicing

of

your

radio,

contact

your

dealer,

Make

no

service

shipments

to

the

factory

as

the

Hallicrafters

Co,

will

not

accept

the

responsibiltty

for

un-

authorized

shipments,

Factory

type

service

is

available

at

any

HALLICRAFTERS

AUTHORIZED

SERVICE

CENTER

which

displays

the

sien

shown

at

the

right

of

the

paga.

For

the

location

of

the

cone

nearest

you,

consult

your

dealer

or

telephone

directary.

The

Hallicrafters

Co.

reserves

the

privilege

of

making

revisions

in

current

communications

production

af

equipment

and

assumes

no

obligation

ta

incorporate

these

revisions

‘equipment

in

earlier

models.

Page

a

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Si 55

ORZ3

Fig.

&

Bottom

View

of

Chassis

Showing

Component

Location

I

SOCKET

WHLWS

ANE

GBOrTOM

VIEWS.

ALL

VOLTAGES

ARE

MEASHREG

BETWEEN

TUBE

SOCKET

TERMINALS

AND

B-

(PIN

5

OF

LESO7)

WITH

ANTENMA

TCRMIRALS

SHORTED,

AMG

SWITGH

AT

AN,

SAaHD

SELEG

TOR

Switch

AT

POSTION

RECGEIVE;s

STANDAY

SWITCH

AT

RECEIVE

AND

TUNING

4ND

DAHOSPREAD

CONTROLS

FULLY

COUNTERCLOCKWISL,

i

LINE,

VOLTAGE

-UT

VOLTS

Ac.

4.

ALL

VOLTAGES

WERE

MEASURED

WITH

&

VAQUUM

TUDE

VOLTHETER

(¥TVM)

AND

ARE

OG

AND

POSITIVE,

UKLESS

OTHERWISE

SPECIFIED.

3%

NG.

NO

CONNECTION,

a]

HR-

WOT

RCANAPLE,

i

FRONT

APRON

I

{eOT

TOA

VIEW

OF

CHASSIS

Fig.

7.

Tube

Socket

Voltage

Chert

Pape

6

SERVICE

PARTS

LIST

Schamatic

Hollicrerfters

Schematic

Halticroftars

Symbol

Description

Part

Number

Symbol

Description

Port

Number

CAPACITORS

SWITCHES

C-1,4,3

Trimmer;

part

of

antenna

5S-14,B,C&@D

Bandswitch

assembly

(BAND

eo

Det

ee

tte

oe

SELECTOR)

GOC393

c-4

Trimmer,

20-120

mmf.

44A4a4

5-2,5

Swiich,

slide;

spdt

(5

PEAKER/

c-5

2700

mmf,

5%,

500V.;

mica

47XZ30B2727

PHONES

and

AM/CW)

GOA4TT

C-64,B,C&D

Tuning

capacitor,

2

section

46C162-1

5-3

Switch,

ON-OFF;

part

of

C-7,

12,

16

220

mmf,

10%,

BO0V.;

mica

47X20B221K

VOLUME

control

R=9

0

wren

c-8,15

.02

mfd,

600V,,

tubular

46AY203F

5-4

Swiich,

siide:

syst

(RECEIVE/

c-9

.05

mfd,

200V_,

tubular

ASADSO3F

STANDBY)

S0A476

c-10

.002

mfd.

600V.,

tubular

S6A090aF

C-11A,B,C

Capacitor,

composite;

5000,

gp’

220,

220

’

and

2000

mmi.,

S0BV.;

SOCKETS

AND

CONNECTORS

ceramic

4$A151

Socket,

dial

lamp;

incladesleads

964011

C-43

.Oi

mid.

6007.,

tubular

46AZ

1037

Socket,

tube:

actal

64250

C-HA,

BC

60-40-40

mid,

L0V,

20

mfd.

Ts-1

Terminal

strip,

ankenna

S8A6TL

&D

25¥,;

epectrotytic

45B09t

Ta-2

Tip

jacks,

PHONE

BEACT1

C-17

Padder,

525

mot,

44A349

C-18

2200

mmf,

5%,

S00V.;

mica

47XIOB222F

c-19

3000

mai,

5%,

500V.;

mica

ATX30B3023

TUBES

AND

DIAL

LAMP

€-20,21,22,

Trimmer;

part

of

oscillator

V-i

L2SA7.

convertor

OX12547

28

ecu

b-B

0

em

ene

Wed

128G7:

IF

amplifier

and

BFO

90K

12867

C-24

.05

mid,

600V.,

tubular

46AY503

vV-3

128Q7

or

128Q7GT/G:

detector

50%12807

or

0-25,26

5000

mmf,

456V.,

ceramic

disc

47Ai66

and

audio

amplifier

90K

125Q7GT

/G

C-27

.02

mfd,

690V.,

motded

tubular

46éBR203L6

Ved

SOLEGT:

andio

output

p0X50LEGT

O-28

10,000

mmf,

450V,,

ceramic

¥-3

S5Z5GT;

rectifier

N0X3525GT

dise

47

Ald

LM~1

Lamp,

dial;

type

47

a9

A004

RESISTORS

R-1

10,000

ohms

1/2

watt,

carbon

28X20K

103M

MISCELLANEOUS

PARTS

R-2,5

4,2

megohms

1/2

watt,

carbon

23X20X225M

Cabinet

bECTI2Z

R-3

22,000

ohms

1/2

watt,

carbon

23K20X223M

Cabinet

beck

320513

R-4

270

chs

1/2

watt,

carbon

23R

20K

271K

Cabinet

bottom

caver

seC501

R-6

330

ohms

1/2

watt,

carbon

23n4a0K90

1M

Cilp

mtg;

for

antenna

coil

R-7

47,000

ohms

1/2

watt,

carbon

23X20K473M

Le

TBAS26

R-4,12,21,22

470,000

ohms

1/2

watt,

carbon

23x20R474M

Dial

cord

(specify

length)

384026

R-9

2

megohms;

VOLUME

control

25Ba896

Dial

srale

930406

R-10

10

megohms

1/2

watt,

carban

23N2EX

106M

Dial

window

22B311

R-1k

220,000

ohms

1/2

wait,

carbon

=

33

X2OXALdM

Knob,

BAND

SELECTOR

and

R-13

150

ohms

1/2

watt,

carbon

23X20X15

1K

VOLUME

154049

R-14,15,17

15

ohms

1/2

watt,

carbon

23X20%

150M

Enob,

BAND

SPREAD

and

R-16,

18,24

22

ohms

1/2

walt,

carbon

23R20K220M

TUNENG

15A048

R-i8

220

ohms

}

watt,

carbon

23R30K22

1M

PL-1

Line

cord

and

piug

BTAQTE

R-20

1000

ohms

1/2

watt,

carbon

23420X%

102M

Line

cord

lock,

male

section

T6AIST-1

R-23

470

ohms

1/4

watt,

carbon

29R2GR47

LS

ine

cord

tock;

female

section

TGAIB7-2

Mounting

foot,

cabinet

164244

COIS

AND

TRANSFORMERS

Pointer,

dats!

BAND

SPREAD

R2A216

L-t

Coil,

antenna;

bands

1,

2and3

51C821

Pointer,

dial;

TUNING

§2A217

L-2

Coil,

antenna,

band

4

S1B1015

Lg-1

Speaker,

5-Inch

PM

a5Ca30

L-3

Coil,

oscillator;

all

bands

510

822

Spring,

dial

cord

T5AQL2

L-4

Choke,

RF:

540

microhenries

53.4107

¥-1

Traneformer,

Lst

IF

BOCSSL

T-2

Transformer,

and

IF

50C532

T-3

Tranaformer,

audia

output

554127

Warranty

“The

GHellicrafier's

Compeny

warrants

each

new

radie

product

manu-

factured

by

it

to

be

free

from

deftetive

material

and

workmanship

and

agrees

to

remedy

any

such

defect

ar

to

furnish

a

new

part

in

exchange

for

any

part

of

any

unit

af

it

manufacture

which

under

normal

instat-

ation,

use

and

service

discloses

such

defect,

provided

the

unit

is

delivered

hy

the

owner

to

our

authorized

radio

deater,

wholesaler,

from

whom

purchased,

ur,

aithorized

service

center,

intact,

for

examination,

with

cil

transportaiian

charges

prepaid

within

ninety

day's

from

ihe

date

of

sale

fo

origina!

purchaser

and

provided

that

such

examination

discloses

in

our

jedgment

that

i

is

thus

defective.

This

warranty

doea

net

extend

to

any

af

our

radio

praducts

which

heave

een

subjected

to

misuse,

neglect,

accident,

incorrect

wiring

net

our

awn,

improper

inatallation,

or

to

use

in

violation

uf

instructions

furnished

by

us,

nor

extend

to

units

which

have

been

repaired

or

altered

aucside

of

our

factory

or

anthorwzed

service center,

nor

ta

cases

where

lie

serial

number

thereof

has

been

removed,

defaced

or

changed,

nor

ta

docessorics

used

therewith

nel

of

anr

own

muinufacture.

Any

part

of

2

unit

approved

for

remedy

or

exchange

hereander

will

be

remedied

or

exchanged

by

the

authorized

radio

dealer

or

wholesaler

without

charge

te

the

owner,

This

warrenty

is

in

dieu

of

all

other

warranties

expressed

or

im

plied

r

athe

renresominives

of

oersan

fe

cothaereod

da

eerie

for

RG

representative

or

person

is

authorized

te

assume

for

us

an.

“

"f

liability

in

connection

with.

sale

of

eur

radio

products."”

Form

No.

aX

2

i

MODEL

S-38C

IF

AMPLIFIER

DETECTOR

&

RUN

2

CONVERTER:

&BFO

AUDIO

AMP

AUDIO

OUTPUT

|

1s;

4

ML

ve

Ay

Na

SSS

igaT

ieeus

DULE-GE

~

BLUE

RECTIFIER

RED:

_—___YeL.ow.

ay

seston

relate

106-185,

00 Of

BO

aTLE

AC

ot

H

Pu

t

wores,

RESATANCE

VALUES

ARE

IN

OHMS.

CAPACITOR

VALUER

ANE

IN

MMP

UNLESS

OTHEAWIBE

SPECIFIED

RERINTOR

MATINGL

ARE

I/2

WATT

UNLESS

OTHERWISE

BPECIF

‘BANG

SELECTOR

SWiTOH

(31)

BHOWH

IM

BAND

4

POSITION,

COMMON

BROUHO

[8-1

CHASSIA

GROUND

wer

annner

Oiba

pwr

LAST

OAFACITOR

SYNBGL

0-20

4

LAST

RESISTOR

SYHBOL

Rat

to4e

i

iis

SAND

SELECTOR

ey

It

SWITCH

S|

xe

H

3

obo

ANT.GOIL

Le

1

(Oey

ser

00r

6

sai

wong

;

a

B

1

By

1

2

8

445

8

©

;

tata

!

&

H

FRONT

WAFER

wt

“4

c

Che

ft

i

[NEAREST

GHASSIS

/

nA

Ske

(yg

3)

Sue

Tate

rt

FRONT

APRON!

ANT.

COM

Ly

*

O8e.

colt

Ly

CAPACITOR

Cy

8000

220

2267"

«2000

REAR

WAFER

NOTE:

VALVES

&

TOLERANCES

SHOWN

ARE

NOMINAL

AND

WARIATION®

MAY

Bt

FOUND,

ITIS

RECOMMENDED

THAT

THE

VALUES

OF

ANY

REPLACEMENT

CORRESPOND

Fig,

8.

Schematic

Diagram

‘TO

THE

NOMINAL

VALUE

OF

THE

PANT

BEING

REPLACED.

Hallicrafters S-38C Training manual

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