094 903123C_Hallicrafters_SX 117_Operating_And_Service_Instructions_Nov1968 903123C Hallicrafters SX 117 Operating And Service Instructions Nov1968

User Manual: 094-903123C_Hallicrafters_SX-117_Operating_And_Service_Instructions_Nov1968

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OPERATING

AND

SERVICE

INSTRUCTIONS

FOR

•••

COMMUNICATION

RECEIVER

MODEL 5X-117

"The

Hallicrafter's

Company

warrants each

new

radio product manu-

factured

by

it to be free. from defective material

and

workmanship

and

agrees to remedy

any

such defect or to furnish a

new

part in ex-

change

for

any

part

of

any

unit of its manufacture which under nor-

mal installation, use

and

service discloses such defect, provided the

unit

is

delivered

by

the owner to our allthorized radio dealer, whole-

saler, from whom purchased, or, authorized service center, illtact, for

examination, with all transportation charges prepaid within ninety

days from tile date

of

sale to original purchaser Imd provided that

such examillation discloses in our judgment that it

is

thus defective.

This warranty 'does not

extend

to allY

of

Ollr

radio products which

have been subjected to misuse, neglect, accident, illcorrect wiring

IIOt

our own, improper installation,

or

to use in violation of instrllctions

furnished by us, nor

extended

to units which have been repaired or

altered alit side

of

Ollr

factory

or

authorized service center, nor to cases

where the serial number thereof has bel'li removed, defaced or changed,

nor to accessories used therewith

IIOt

of our

own

manufacture.

Any

part of a unit al'llroved for remedy or exchange hereunder will

be remedied or exchanged

by

the

authorized radio dealer or whole-

saler without charge to the owner.

This warranty

is

in lieu of all other u:arranties expressed

or

iml,lied

and

no representative

or

I,erson

is

allthorized to assllme

for

liS

allY

other liability in connection witl. tl.e sale of our radio products:'

092-016679

Figure

1.

Hal/icrafters'

Model

SX

-

117.

SECTION I

GENERAL

DESCRIPTION

The

Model

SX-117

is

a

triple--conversion,

super-

heterodyne-type

comm

uni

cations

receiver

having

the

following

features:

• Op

eration

on

most

fr

eq

u

encies

from

85

KC

to

30 MC

(see

paragraph

5-7).

• A

VFO

which

can

be

used

as

a

crystal-

l

ocked

oscillator

for

fixed-channel

operation

(see

paragraph

5-8).

• A

high

order

of

mechanical

and

elect

ri

cal

stability.

• An

easy

-t

o-

r

ead

dial.

• A

constant

tuning

rate

on

a

ll

bands.

• A

transmitter-type

VFO.

• B

acklash

-fr

ee

combi

nati

on

pinch

and

g

ear

drive.

•

Crystal-controlled

first

and

third

conversion

oscillators

.

•

Less

than

1/ 2

microvolt

sensitivity

on SSB/

CWo

-/

-

•

Excellent

spurious

and

image

rejection.

•

Selectable

sidebands.

•

Selectivity

variable

in

thr

ee

steps,

500

CPS,

2.5 KC,

and

5 KC.

•

Amplified

fast

-att

ack,

slow-release

AVC

for

SSB/CW;

fast-attack,

fast-release

for

AM.

•

Pr

oduct

detector

for

SSB/CW;

enve

l

ope

detec-

tor

for

AM.

•

IF-type

noise

limiter.

•

100-KC

Crystal

Calibrator.

• Audio

inv

erse

feedback.

•

Approximate

1-KC

marks

on

tuning

knob

skirt.

•

Variable

T-Notch

rejection

filter.

•

Gr

ea

tly

r

ed

u

ced

weight

through

us

e

of

a

lumi-

num

for

c

hassis,

panel,

cab

in

et,

brackets,

etc

.

• New

smaller

size.

SECTION II

TECHNICAL

SPECIFICATIONS

Basic

Frequency

Coverage

*WWV

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

9.5

MC

to

10.0

MC

80-Meter

Band.

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

..

3.5

MC

to

4.0

MC

40-Meter

Band

20-Meter

Band

15-Meter

Band

*10-Meter

Band

10-Meter

Band

*10-Meter

Band

*10-Meter

Band

*Crystals

not

supplied.

7.0

MC

to

7.5

MC

14.0

MC

to

14.5

MC

21.0

MC

to

21.5

MC

28.0

MC

to

28.5 MC

28.5

MC

to

29.0

MC

29.0 MC

to

29.5

MC

29.5

MC

to

30.0

MC

Note

-

See

paragraph

5-7

for

additional

information.

IF

Frequencies:

..........

.

Reception:

..•............

Sensitivity

-AM:

.......•...

3 MC

to

30 MC

Sensitivity

-SSB/CW:

...•...

3

MC

to

30 MC

Sensitivity

(with HA-10):

85

KC

to

3

MC

Selectivity:

Stability:

......•.........

Calibration

Accuracy:

......

.

IF

Rejection:

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

.

In-Band

Tweets:

..........

.

Audio

Power

Output:

.......

.

AVC

Figure

of

Merit:

Power

Source:

...........

.

Power

Consumption:

..•.....

Number

of

Tubes:

.....•....

Audio

Output

Impedance:

Headphone Output:

..•.......

Antenna

Input

Impedance:

(High

Frequency)

6.5

MC

to

6.0 MC

(Variable),

1650 KC,

and

50.75 KC.

AM, CW,

and

Single

Sideband

(SSB).

Less

than

1

microvolt

for

10-DB

signal-to-noise

ratio

(30%

modulation).

Less

than

1/2

microvolt.

5

to

10

microvolts.

Variable

in

three

steps

providing

0.5 KC, 2.5 KC, and 5

KC

at

6 DB down.

Better

than

300 CPS

after

warmup.

Better

than

2

KC

between

adjacent

100-KC

calibration

points

after

indexing.

More

than

50 DB.

Less

than

1/2

microvolt

equivalent

(within

amateur

bands).

3/4

watt

with

less

than

10%

distortion.

More

than

80 DB.

105

volts

to

125

volts,

50/60

cycles~

70

watts.

14 (one

not

supplied),

plus

four

silicon

diodes.

3.2

ohms

and

500

ohms;

rear-mounted

screw

terminals.

50

ohms

to

2000

ohms;

panel-mounted

jack

accepts

standard

1/4-inch

plug.

50

ohms

to

70

ohms

unbalanced;

rear-mounted

RCA-type

phono

jack

accepts

RCA-type

phono plug.

NOTE:

Chassis

punched

to

accept

Amphenol

Type

SO-239

coaxial

receptacle;

for

use

from

3.0

MC

to

30 MC.

-2-

Low

Frequency

Input:

Remote

Standby

Control:

Demensions:

Net

Weight:

Shipping Weight:

CATHODE

FOLLOWER

CRYSTAL

OSCILLATOR

(OPTIONAL)

High

impedance

to

first

mixer

grid;

for

use

with

external-

tuned

circuit

from

85

KC

to

3.0

MC.

RCA-type

phono

jack

accepts

RCA-type

phono

plug.

Rear-mounted

screw

terminals.

7-3/4

inches

high,

15

inches

wide,

and

14-3/4

inches

deep.

18-1/2

pounds.

21

pounds

(approximately).

CATHODE

FOLLOWER

VARIABLE

FREQUENCY

OSCILLATOR

tVfO)

I

PRODUCT

DETECTOR

BEAT

FREQUENcY

OSCILLATOR

{BFO!

L

________

-1

6DC6

RF

Amplifier

Figure

2.

Block

Diagram

of

the

Receiver.

TUBES

AND

FUNCTIONS

FIRST

AUDIO

AMPLIFIER

AUDIO

OUTPUT

092-015642

6EA8

Third

Mixer,

SSB-Switching

Crystal

Oscillator

6EA8

12AT7

*6EA8

First

Mixer,

Cathode

Follower

Amateur-Band

Crystal

Oscillator

Auxiliary

Crystal

Oscillator

6BA6

6BE6

6BN8

50.75-KC

IF

Amplifier

Product

Detector,

BFO

AM

Detector,

AVe

Amplifier,

AVC

Rectifier

6BA6

6BE6

6EA8

6DC6

6-MC

to

6.5-MC

IF

Amplifier

Second

Mixer

VFO,

Cathode

Follower

1650-KC

IF

Amplifier

6GW8

6AU6

First

Audio

Amplifier,

Audio

Output

100-KC

Crystal-Calibrator

Oscillator

Two

each

Silicon

Noise-

Limiter

Diodes.

Two

each

Silicon

Power-Supply

Diodes.

*Not

Supplied

-3-

SECTION

III

INSTALLATION

3-1.

UNPACKING

.

After

unpacking

the

receiver,

examine

it

for

damage

which

may

have

occurred

in

transit.

Should

any

sign

of

damage

be

apparent,

file

a

cla

im

immediately

with

the

carrier

stating

the

extent

of

damage.

Carefully

check

all

shipping

labels

and

tags

for

instructions

before

removing

or

destroy-

ing

them.

IMPORTANT

To

remove

top

cover,

turn

screws

approximately

one

quarter

turn

counterclockw

is

e.

Do

not

attempt

to

remove

screws

.

3-2.

LOCATION.

The

receiver

may

be

placed

in

any

location

that

will

permit

free

air

circulation

through

the

ventilation

holes

and

openings

in

the

cabinet.

Avoid

excessively

warm

locations

such

as

those

near

radiators

and

heating

vents.

Also

avoid

direct

blasts

of

air

from

circulating

fans,

etc.

Do

not

place

speakers

or

any

other

objects

on

the

cabinet

cover

in

a

manner

that

will

impair

natural

venti-

lation.

• •••

wr.·

3-3.

ANTENNAS

.

The

Model

SX-117

uses

an

input

circuit

de-

signed

for

an

unbalanced

50-ohm

to

70-ohm

input.

Any of

the

popular

dipole

or

beam

antennas

using

50-ohm

to

70-ohm

coaxial

transmission

line

will

suffice.

It

should

be

remembered,

however,

that

these

antennas

will

give

optimum

results

over

a

limited

frequency

range

only.

Generally

speaking,

the

same

rules

that

apply

to

transmitting

antennas

will

hold

true

for

receiving

antennas.

For

further

information

on

this

subject,

refer

to

the

"Radio

Amateur's

Handbook"

or

the

"

A.

R. R. L.

Antenna

B

ook,"

both

published

by

the

American

Radio

Re-

lay

L

eague,

West

Hartford,

Connecticut,

U.S.A.

IMPORTANT

Some

form

of

lightning

protection

should

be

provided

which

will

comply

with

local-code

requirements.

3-4.

GROUNDS

.

All

station

equipment

should

be

bonded

to-

gether

with

heavy

copper

wire

or

braid

and

con-

nected

to

a

cold

-w

ater

pipe

or

earth

ground.

An

external

chassis

ground

terminal

is

provided

on

the

rear

of

the

Model

SX-117

for

this

purpose.

o

~e·

• •

CRYSTAL

LF

ANTENNA

ANTENNA

VFO

OUTPUT

FUSE

FI

OSCILL

ATOR

CHASSIS

GROUND

I AMP

OUTPUT

092-016680

Figure

3.

View

Showing

Rear

Chassis

Connections

.

-4-

3-5.

POWER

SOURCE.

The

SX-117

is

designed

to

operate

from

a

105-volt

to

125-volt,

50/60-cycle,

AC

power

source.

Power

consumption

is

70

watts.

NOTE

If

in

doubt about

your

power

source,

contact

your

local

power

company

prior

to

inserting

the

power

cord

into

any

power

outlet.

Plugging

the

power

cord

into

the

wrong

source

can

cause

extensive

damage

to

the

unit.

3-6.

SPEAKER.

A

terminal

strip,

marked

G,

3.2,

and 500,

is

provided

at

the

rear

of

the

receiver

for

connecting

an

external

speaker

or

line

(see

figure

3). Any

per-

manent-magnet

type

speaker

with

a 3.

2-ohm

voice

coil

can

be

used

by

connecting

the

two

leads

from

the

speaker

voice

coil

to

the

terminals

marked

3.2

and

G.

If

it

is

desired

to

use

a

speaker

with

a

voice-coil

impedance

other

than

3.2

ohms,

a

matching

transformer

should

be

employed

to

in-

sure

optimum

performance.

The

transformer

should

be

mounted

on

or

near

the

speaker,

should

have

a

500-ohm

primary

impedance,

and

should

have

a

secondary

impedance

to

match

that

of

the

speaker

voice

coil.

Connect

the

primary

of

the

matching

transformer

to

the

terminals

marked

500

and

G and

the

secondary

to

the

speaker

voice

coil

terminals.

SPEAKER

The

Hallicrafters

Model R47

Speaker

is

particularly

suited

for

voice

and

CW

use.

Model

R48A

Speaker,

with

its

two-position

VOICE-

FI-

DELITY

switch

will give

excellent

results

for

all

modes

of

operation.

The

leads

of

either

speaker

are

to

be

connected

to

the

terminals

marked

3.2

and

G.

3-7.

HEADPHONES.

The

headphone

jack

marked

PHONES

is

lo-

cated

on

the

front

panel

and

is

wired

so

that

the

3.2-ohm

speaker

output

is

automatically

disabled

when

the

headphones

are

inserted.

The

headphone

impedance

is

not

critical,

and any

headphones

ranging

in

impedance

from

50

ohms

to 2000

ohms

will

provide

satisfactory

performance.

It

should

be

noted

that,

although

insertion

of

the

headphone

plug

into

the

front

panel

jack

will

silence

the

3.2-ohm

speaker

output,

the

500-ohm

output will

remain

in

operation

at

all

times.

3-8.

REMOTE

RECEIVE-STAN

DB

Y

SWITCHING.

The

receiver

may

be

disabled

from

a

re-

mote

location

by

removing

the

jumper

between

the

terminals

marked

STANDBY and G on

the

rear

of

the

chassis

and

then

connecting

a SPST

switch

or

relay

between

these

terminals.

The

switch

or

re-

lay

contacts

should

be

so

wired

as

to

close

in

Re-

ceive

and

open

in

Transmit.

The

receiver

may

also

be

disabled

in

Trans-

mit

by

turning

the

RF

GAIN

control

to

0 (fully

counterclockwise).

~

V.cy

3.2fi

r-

NOTE: DOTTED LINES INSIDE

BOXES

DENOTES INTERNAL WIRING

SXIOI-

SXIII

-SXI15

CONTROL

OUTLET

RECEIVER

HT

32B

-

HT37

HT33B,HT4I,

OR

TYPICAL

LINEAR

AMPL.

FINAL

BIAS -........"

T""'-'-

T---'---

SUPPLY

'*'

'*'

NC~_~----,

' T T

NO

--0-

_~

____

I:

R F

""

RG58IL

""

R~

.r---'

I I

OUT

~ ~

I,

~

TO

GRID

RETURN

OPERATING

BIAS

RESISTOR

STANDBY ANT ENNA

~

ANT.

OUTPUT

03

50so INPUT

500

0

02Q

70

3.2

':Jl.-

-

GND-,

~tND'POST

l BIAS \,7

RESISTOR

~

NC4---~

~FOUTPUT

NO---o-:-:'

~r:;~~~-.r:4

NC

GND

@

GND

POST-*-

W'

~NO

.....,...;.PO..;,.S;;...T-t-

______

.......

ADJUST

FOR

RG8/U

* LEVEL

~~~~

I

~,-::-i==~it:OK~~=L=-==~====-=J~I===========+~====~--------~--------~R~G5~8~/~U

____

~J

~~~

l

:----,:

:

~,:,

ANTENNA

rb

I I I

CHANGE

OVER

STAND-BY]

iANTENNA I RELAY

TERMINAL 1 'INPUT :

,

TO

CHASSIS

GND

@ I

3.2!l

I

SPEAKER4 J

TERMINAL

p~~~-

-----------

--------

-NOTE:

ALL

CHASSIS SHOULD

L-

________

...

* NOTE: USE

OF

10K

POT

FOR

BE BONDED TOGETHER

SX-117

MONITERING

LEVEL

OPTIONAL AND

TO

EARTH

OR

(NOT SUPPLIED

l.

WATER

PIPE

GROUND.

Figure

4.

Typical

Station

Setup.

-5-

TO

117VAC

092-014605

R.f.

GAIN

4 5 ,

:,0:'

10

XTAL

SELECTOR

1

ha//;craliers

TUNING

.

MODEL

SX-117

HGAIN

,',0:'

10

NOTCH

fREO.

·"~·o·'

• •

"ot'

BANOSELECTOR

20

21

14

':':u:

"::0:"

(j19:9·~L~WWO

PHONES

CAL

RESET

53

54

fUNCTION

SELECTIVITY

AM

USB

5.0

1.5

0.5

·

""6·:'0"'(:)

0

BfO

092-015915

Figure 5. Front

Panel

View

of

Receiver.

SECTION

IV

FUNCTIONS

OF

OPERATING

CONTROLS

4-1.

RF

GAIN

CONTROL.

The

RF

GAIN

control

varies

the

gain

of

the

RF

amplifier

and

the

50.

75-KC

IF

amplifier.

Max-

imum

sensitivity

is

obtained

with

the

control

set

at

10 (fully

clockwise).

In

this

position,

the

tubes

being

controlled

are

operating

at

maximum

gain

with

minimum

cathode

bias.

As

the

control

is

ro-

tated

counterclockwise,

the

cathode

bias

is

in-

creased

with

a

resultant

decrease

in

gain.

The

normal

setting

of

the

RF

GAIN

control

will

vary

with

conditions.

When

searching

for

weak

signals,

the

control

should

be

well

advanced.

When

copying

strong

signals

under

crowded

or

noisy

conditions,

it

may

be

found

desirable

to

reduce

the

RF

GAIN

control

setting.

It

should

be

remembered

that

the

S-Meter

calibration

will

be

correct

only

with

the

RF

GAIN

control

fully

advanced

to 10.

AVC

is

automatically

controlled

by

the

RF

GAIN

control

so

that

it

is

not

necessary

to

dis-

able

the

AVC

circuitry

for

any

mode

of

reception.

4-2.

BAND

SElECTOR

CONTROL.

The

BAND

SELECTOR

control

operates

the

bandswitch

to

place

the

proper

crystal

and

coils

into

the

circuit

to

cover

the

desired

frequency

range.

-6-

It

should

be

noted

that

several

bandswitch

positions

are

identified

by

a

red

dot. When

the

switch

is

rotated

to

one

ofthese

positions,

the

red

dial

scale

should

be

used.

In

the

LF

position,

the

bandswitch

discon-

nects

the

internal-tuned

circuits

and

connects

the

first

mixer

grid

to

the

LF

INPUT

jack

on

the

rear

panel.

4-3.

PRESElECTOR.

The

PRESELECTOR

control

provides

pre-

cise

tuning

of

the

antenna

and

mixer

coils

to

give

maximum

gain

and

optimum

signal-to-noise

ratio.

It

also

allows

coverage

of

the

entire

3.0-MC

to

30-MC

range

(see

paragraph

5-7).

NOTE

Care

should

be

exercised

when

setting

the

PRESELECTOR

control

on

the

40-

meter

(7.0 MC)

or

WWV

bands.

It

is

possible

to

tune

the

PRESELECTOR

control

to

the

6.5-MC

to

6.0-MC

first

IF

frequency.

The

correct

setting

for

the

40-meter

band

is

indicated

by

the

block

marked

40.

The

correct

setting

for

WWV

(9.5 MC

to

10

Me)

will

be

be-

tween

8

and

9

on

the

PRESELECTOR

logging

scale.

·

Under

certain

conditions

where

excessive

noise

or

interference

is

encountered,

it

may

be

found

desirable

to

slightly

detune

the

PRESEL-

ECTOR

control

for

optimum

reception.

4-4.

AF

(AUDIO)

GAIN

CONTROL.

The

AF

GAIN

control

adjusts

the

audio

out-

put

level

at

the

speaker

terminals

and

PHONES

jack.

Clockwise

rotation

increases

the

signal

voltage

applied

to

the

grid

of

the

audio

am-

plifier,

thus

increasing

the

audio output.

4-5.

SELECTIVITY

SWITCH.

The

SELECTIVITY

switch

is

used

to

vary

the

IF

bandwidth to

suit

receiving

conditions.

Three

degrees

of

selectivity

are

available,

rang-

ing

from

500

CPS

for

CW

reception

under

crowded-band

conditions

to

5

kilocycles

for

maxi-

mum

fidelity

on

voice

or

music-modulated

signals

where

conditions

permit.

The

three

positions

are

marked

on

the

front

panel

and

indicate

the

50.75-

KC

IF

bandwidth

at

the

6-DB

points.

See

figure

6

for

typical

IF

selectivity

curves.

The

recommended

positions

for

the

various

modes

of

operation

are

as

follows:

CW

0.5

KC

or

2.5

KC

SSB 2.5

KC

AM

2.5

KC

or

5.0

KC

4-6.

FUNCTION

SWITCH.

The

FUNCTION

switch

is

afour-positionro-

tary

switch

performing

the

following

functions:

Position

Function

OFF.

.

•.

disconnects

the

117-volt,

60-

cycle,

AC

power.

AM

.....

a.

Connects

the

117-volt,

60-

cycle,

AC

power.

b.

Disables

the

BFa.

c.

Connects

audio

to

the

enve-

lope

detector.

d.

Selects

fast-attack,

fast-re-

lease

AVC.

e.

Connects

the

1700-

KC

side-

band-switching

crystal.

USB

.....

a.

Connects

audio

to

the

product

detector.

b.

Energizes

the

BFa.

-7-

z

o

~

6

30

~

40

w

I-

!i

III

a

60

80

KC OFF RESONANCE

10

8 6 4 2 + 0 - 2 4 6 8

10

i (

,

I ;

~

j I

\\

J ; \

I 1 ! ,

I:

I

I;

i

\ I

1\

I

; I

1\

\

I

I \

I I ,

; I ' ,

!

1\

! I \

I \

1\

5 2.5 \ \

KC

KC

! f ;

I !

1\

\

II

; \

.5

\

1\

I

KC

1 I

\\

J "

\

I I \ \

I I \ \

o

092-016760

Figure

6.

IF

Selectivity

Curves.

c.

Selects

fast-attack,

slow-

release

AVC.

d.

Connects

the

1700-KC

side-

band-switching

crystal.

LSB . .

..

a.

Connects

audio

to

the

pro-

duct

detector.

b.

Energizes

the

BFa.

c.

S e I e c t s

fast-attack,

slow-

release

AVC.

d.

Connects

1600-

KC

sideband-

switching

crystal.

To

illustrate

how

selectable-sideband

re-

ception

is

accomplished,

a

numerical

example

is

given.

Consider

an

incoming

signal

at

7000 KC,

modulated

1

KC.

Since

modulation

of a

carrier

causes

the

generation

of

sideband

frequencies

numerically

equal to

the

carrier

frequency

plus

or

minus

the

modulation

frequency,

the

incoming

signal

consists

of ,the

carrier

at

7000 KC, a

lower

sideband

at

6999 KC, and an

upper

side-

band

at

7001

KC.

See

figure

7

A.

The

incoming

signal

is

first

heterodyned

with

the

output of

the

first

conversion

oscillator

in

the

first

mixer.

The

first

conversion

oscillator

operates

at

a

frequency

higher

than

the

incoming

signal

by

an

amount

equal to

the

first

IF

fre-

quency of 6.500

MC

(variable

IF). As a

result

of

this,

three

new

lower

frequencies

are

produced

in

the

output of

the

first

mixer:

the

carrier

at

6.500 MC,

the

lower

sideband

at

6.501MC, and

the

upper

sideband

at

6.499 MC.

These

signals

are

amplified

by

the

6.500-MC

to

6.000-MC

IF

stage

and

then

heterodyned

with

the

output of

the

VFO

(4.85

MC

to 4.35

MC)

in

the

second

mixer.

Three

new

lower

frequencies

are

again

produced

in

the

output of

this

mixer

stage:

a

center

frequency

of 1650 KC, a

lower

sideband

of 1651 KC, and an

upper

sideband

of 1649

KC.

These

signals

are

amplified

by

the

1650-KC

IF

amplifier

and

fed

to

the

third

mixer,

where

they

are

heterodyned

with

the

output of

either

the

1600-KC (lower sideband)

or

the

1700-KC (upper

sideband)

crystal-controlled

third

conversion

os-

cillator.

When

the

FUNCTION

switch

is

placed

in

the

LSB

position,

three

new

lower

frequencies

S,4NC

TRAP

INCOMING

SIGNAL

NOTE:

LSB-LOWER

SIDEBAND

USB-UPPER

SIDEBAND

NOT

TO

SCALE.

ILLUSTRATION

ONLY

OUTPUT

OF

I

ST

MIXER

are

produced:

the

carrier

frequency

at

50 KC,

the

lower

sideband

at

51

KC, and

the

upper

sideband

at

49

KC.

By

referring

to

figure

7D,

it

can

be

seen

that

the

lower

sideband

falls

within

the

IF

passband

and

the

upper

sideband

is

rejected.

When

the

FUNCTION

switch

is

placed

in

USB

position,

the

carrier

frequency

remains

at

50

KC

but

the

sidebands

are

reversed

in

the

heter-

odyning

process.

The

upper

sideband

will now

be

51

KC

and

falls

within

the

IF

passband,

while

the

lower

sideband

will

appear

at

49

KC

and

be

rejected.

4-7.

NOTCH

FREQ

(FREQUENCY)

CONTROL.

The

NOTCH

FREQcontrol

varies

the

notch

frequency

within

the

50.75-KC

IF

passband

and

is

very

useful

in

attenuating

an

undesirable

hetero-

dyne. Since

the

notch

width

is

quite

narrow,

it

is

essentially

a

single-frequency

device

and cannot

attenuate

more

than one

heterodyne

if

the

hetero-

dynes

are

separated

in

frequency

by

more

than

500 CPS.

The

NOTCH

FREQ

control

is

very

effective

when

using

exalted

carrier

reception

(AM

with

BFO

on). The

notch

control

is

adjusted

to

approxi-

mately

50

KC

so

that

the

incoming

signal

carrier

is

removed.

This

will

remove

the

low-frequency

heterodyne

which

may

be

heard

if

the

receiver

is

not

tuned

to

exactly

zero

beat

with

the

incoming

signal.

The

AM

signal

under

these

conditions

will

tune

similar

to

double-sideband

suppressed

car-

rier

and

may

be

received

in

the

USB

(upper-

sideband)

or

the

LSB

(lower-sideband)

position.

OUTPUT

OF

2ND

MIXER

3RD

CONV,

OSCILLATOR

FREQ,=

1600KC

3RD

CONV,

OSCILLATOR

FREO,=1700KC

OUTPUT

OF

3RD

MIXER

092-01581S

Figure

7.

Selectable-Sideband

Response

Curves.

-8-

""

C>

>=

c

~

:z

...

.....

.....

..,

CD

co

If

-KC

---.t

t--

NOTCH

fREQUENCY

RANGE

58 54

50

46

42

3KC

CURVE

r-~

WITHOUT

NOTCH

--:

'

6r-------------~_,~---J~----~--~

20

::E

~

~

~

::E

co

c

0

40

..,

60r----7----------+-------~----~--~

80~----------------------------~--~

092-203878

Figure 8.

IF

Selectivity

with

Notch.

The

notch

calibration

is

quite

accurate

and

may

be

used

as

a

guide

in

determining

where

the

NOTCH

FREQ

control

should

be

set

to

attenuate

an

interfering

signal,

provided

the

BFO

fre-

quency

is

set

as

described

under

BFO

operation.

For

example,

if

the

heterodyne

is

approximately

1000

CPS,

the

null

point

would

be

near

51

KC.

If

the

heterodyne

is

2000

CPS,

the

null

point

would

be

near

52 KC,

etc.

4-8.

BFa

CONTR

OL.

The

BFO

control

is

a

front-panel

adjust-

ment

which

allows

the

beat

frequency

oscillator

to

be

set

at

exactly

50 KC.

NOTE

The

BFO

control

should

not

be

used

for

tuning

purposes

as

the

BFO

fre-

quency

must

be

maintained

if

optimum

performance

is

to

be

obtained.

The

correct

setting

will

be

near

the

point

where

the

knob

and

panel

marks

coincide.

The

exact

point

may

be

found

by

placing

the

FUNCTION

switch

in

USB,

the

SELECTIVITY

control

at

5.0

KC,

and

tuning

in

a

CW

signal

or

crystal

calibrator

to

near

zero

beat.

Switch

the

FUNCTION

control

to

-9-

LSB.

The

beat

note

should

not

change

frequency.

If

it

does,

adjust

the

BFO

control

until

the

beat

note

frequency

remains

the

same

in

the

USB

or

LSB

position.

The

control

should

always

be

at

this

point.

4-9.

TUNING

CONTROL.

The

TUNING

control

is

used

to

vary

the

fre-

quency

of

the

VFO

to

allow

reception

of

the

de-

sired

signal.

It

also

rotates

the

dial

past

a

station-

ary

pointer

to

indicate

the

frequency

in

kilocycles.

It

should

be

noted

that

two

scales

appear

on

the

dial:

0

to

500

KC

and

500

KC

to

1000 KC.

If

the

band

being

tuned

starts

at

the

even

megacycle,

(e.g.,

7.0),

the

frequency

is

read

on

the

0

to

500-

KC

scale;

ifthe

band

starts

on

0.5

megacycle

(e.g.,

3.5),

the

frequency

is

read

on

the

500-KC

to

1000-

KC

scale.

If

the

BAND

SELECTOR

is

set

opposite

ared

dot,

the

red

dial

scale

should

be

used

to

indicate

the

correct

frequency.

The

skirt

on

the

TUNING knob

is

divided

into 15

segments.

Each

division

will

represent

approximately

one

kilocycle

of

frequency

change.

4-10.

CAL

RESET

CONTROL.

The

CAL

RESET

control

operates

a

variable

trimmer

to

allow

the

VFO

calibration

to

be

set

exactly

to

frequency

at

any

check

point.

If

the

dial

calibration

does

not

agree

with

the

frequency

of

a known

signal,

such

as

a

crystal

calibrator,

the

CAL

RESET

control

should

be

adjusted

as

necessary

to

correct

the

calibration

error.

4-11.

OFF-NL-CAL

SWITCH.

The

OFF-NL-CAL

control

is

a

three-posi-

tion

rotary

switch

performing

the

following

func-

tions:

1.

OFF

-

In

this

position,

both

the

noise

limiter

and

100-KC

crystal

calibrator

circuits

are

disabled.

2.

NL

-In

this

position,

the

noise

limiter

is

placed

in

operation

(see

paragraph

5-6).

3.

CAL

-

In

this

position,

the

100-KC

crystal

calibrator

is

placed

in

oper-

ation

to

provide

marker

signals

at

every

100-KC

point

on

the

dial.

NOTE

The

100-KC

crystal

calibrator

should

not

be

left

in

the

ON

position

after

dial

calibration

is

completed.

Under

certain

conditions

it

can

cause

spur-

ious

responses

to

be

developed.

4-12.

XTAL

SElECTOR

SWITCH.

The

XTAL

SELECTOR

switch

is

a

five-

position

rotary

switch

performing

the

following

functions:

1.

NORMAL -In

the

NORMAL

position,

plate

voltage

is

removed

from

the

auxiliary

crystal

oscillator

(6EA8

2.

3.

not

supplied)

and

the

receiver

will

operate

on

the

ranges

indicated

by

the

BAND

SELECTOR

knob.

1 AND 2 -

Positions

1

and

2

of

the

XT

AL

SELECTOR

switch

will

disable

the

12AT7

fir

st

crystal

oscillator,

apply

voltage

to

the

6EA8

auxiliary

os-

cillator,

and

select

crystals

inserted

in

auxiliary

crystal

sockets

1

or

2.

Use

only

type

CR-18/U

crystals

whose

frequencies

fall

between

6.5

MC

and

20.00 MC

(inclusive)

in

these

sockets

(see

paragraph

5-7).

3 AND 4 -

Positions

3

and

4

also

dis-

able

the

12AT7

first

crystal

oscil-

lator,

apply

plate

voltage

to

the

6EA8

auxiliary

oscillator,

and

select

cry-

stals

inserted

in

auxiliary

crystal

sockets

3

and

4.

Use

only

type

CR-

23/U

crystals

whose

frequencies

fall

between

20.5 MC

and

34.0 MC

(inclu-

sive)

in

these

sockets

(see

paragraph

5-7).

SECTION

V

OPERATION

5 -1.

SINGLE-SIDEBAND

RECEPTION.

Set

the

front

panel

controls

as

outlined

below.

RF

GAIN.

. . . . •

..

Usually

at

10

(maybe

reduced

as

noise

and

QRM

dictate).

NOTE

S-Meter

reading

will

be

correct

only

with

the

RF

GAIN

control

set

at

10.

BAND

SELECTOR

•.

To

desired

band.

AUDIO GAIN . . •

..

Approximately

2.

SELECTIVITY

....

2.5 KC.

FUNCTION . . . .

..

Usually

LSB

for

80

and

40

meters

and

USB

for

20,

15and10

meters.

BFO

. . . . . . . . .

..

Center

or

0

position

(do

not

use

BFO

con-

trol

for

tuning

pur-

poses).

NOTCH

.........

OFF

PRESELECTOR

.

..

Peaked

for

maximum

signal.

-10-

XTAL

CAL

OFF

NL

(Noise

Limiter).

Use

as

noise

condi-

tions

dictate.

TUNING . . . . . .

..

As

desired.

Slowly

adjust

the

TUNING

control

until

the

voice

modulation

sounds

natural.

Peak

the

PRE-

SELECTOR

for

maximum

S-Meter

indication

and

adjust

the

AUDIO GAIN

control

as

desired.

If

an

undesirable

heterodyne

appears,

ad

jus

t

the

NOTCH

control

for

maximum

attenuation.

It

should

be

remembered

that

an

SSB

signal

will

convey

intelligence

only

when

the

correct

sideband

position

has

been

selected

on

the

FUNC-

TION

switch.

If

the

signal

does

not

tune

in

pro-

perly,

change

the

FUNCTION

switch

to

the

other

SSB

position

and

retune.

The

RF

GAIN

control

should

normally

be

set

at

10

(maximum

sensitivity).

Under

adverse

conditions,

it

may

be

found

advantageous

to

reduc

e

the

RF

GAIN to

improve

reception.

It

should

be

remembered

that,

as

the

RF

GAIN

is

reduced,

the

AVC will

be

reduced.

Also,

correct

S-Meter

readings

will

be

indicated

only

with

the

RF

GAIN

at

10.

5-2.

CW

RECEPTION.

Set

all

controls

as

described

under

single-

sideband

reception

except

for

the

SELECTIVITY

and

noise

limiter

controls.

The

SELECTIVITY

control

will

usually

be

in

the

0.5

KC

position

for

CWo

The

NL

(noise

limiter)

can

be

used

to

ad-

vantage

at

all

times

in

CW

reception

and

will

be

very

effective

in

reducing

impulse

noise,

key

clicks,

etc.

The

NOTCH

control

should

be

used

as

necessary

to

attenuate

interfering

signals

and

heterodynes.

The

RF

GAIN

control

should

be

adjusted

as

conditions

dictate

for

best

reception.

NOTE

Do

not

use

the

BFO

control

for

tuning

purposes.

5-3.

AM

RECEPTION.

Set

all

controls

as

described

under

single-

sideband

reception

except

for

the

FUNCTION

con-

trol.

The

FUNCTION

control

should

be

placed

in

the

AM

position.

The

SELECTIVITY

control

maybeplacedin

the

5.0-KC

position

for

improved

fidelity

where

band

conditions

permit.

The

RF

GAIN

control

will

normally

be

set

at

10

for

AM

reception

except

on

extremely

strong

local

signals.

If

the

NL

(noise

limiter)

is

used

on AM,

distortion

can

be

reduced

by

reducing

the

RF

GAIN

control

setting

to

the

lowest

practical

level.

The

NOTCH

control

should

be

used

as

nec-

essary

for

removing

undesirable

heterodynes.

5-4.

EXALTED

CARRIER

AM

RECEPTION.

In

short-wave

reception,

it

frequently

hap-

pens

that

transmission

conditions

are

different

for

waves

of

slightly

different

frequencies.

As

a

result,

in

the

case

of

voice

modulated

transmis-

sions,

AM

particularly,

which

involve

sideband

frequencies

differing

slightly

from

the

carrier

frequency,

the

carrier

and

sideband

components

may

not

be

received

in

the

same

relative

ampli-

tudes

and

phases

that

were

present

at

the

trans-

mitter.

This

effect,

known

as

selective

fading,

causes

severe

distortion

of

the

signal.

-11-

This

type

of

distortion

can

be

reduced

con-

siderably

by

utilizing

the

selectable-sideband

feature

of

the

Model

SX-117

receiver

operating

in

an

exalted

carrier

mode

(i.

e.,

the

transmitted

car-

rier

is

positioned

out

of

the

receiver's

IF

pass-

band

along

with

one

sideband,

producing

a

sup-

pressed

carrier

single-sideband

signal).

The

car-

rier

is

subsequently

reinserted

by

the

receiver's

BFO

and

the

signal

is

detected

in

the

same

manner

as

a

single-sideband

signal.

All

controls

should

be

set

as

described

un-

der

single-sideband

reception.

Place

the

FUNC-

TION

switch

in

the

SSB

position

that

gives

best

reception.

In

addition,

the

NOTCH

control

should

be

adjusted

to

the

carrier

frequency

(approxi-

mately

50

KC)

to

null

out

the

incoming

signal

carrier.

If

noise

conditions

warrant,

the

noise

limiter

should

be

used.

5-5.

USE

AND

ADJUSTMENT

OF

S-METER.

The

S-Meter

provides

a

visual

means

of

determining

whether

or

not

the

receiver

is

properly

tuned,

as

well

as

providing

an

indication

of

the

signal

strength.

The

S-Meter

is

calibrated

in

S-units

to

9

and

in

decibels

to 70 DB

above

S9.

The

meter

calibration

will

be

correct

only

when

the

RF

GAIN

control

is

set

at

10 (fully

clockwise).

S9

represents

a

50-microvolt

signal

at

the

antenna

input.

Each

S-unit

represents

approxi-

mately

6 DB

change

in

signal

strength.

For

accurate

readings,

the

meter

zero

should

be

checked

periodically.

To

adjust

the

electrical

zero

on

the

meter,

turn

the

RF

GAIN

control

to 0 (fully

counterclockwise).

Rotate

the

Meter

Zero

control

as

necessary

so

that

the

meter

pointer

is

aligned

with

the

last

calibration

mark

on

the

left

side

of

the

meter

scale.

IMPORTANT

To

remove

top

cover,

turn

screws

a p

pro

x i

mat

ely

one

quarter

turn

counterclockwise.

Do

not

attempt

to

remove

screws.

The

Meter

Zero

control

may

be

found

di-

rectly

under

the

rear

of

the

meter

housing.

CAUTION

Do

not

disturb

the

adjustment

of

the

Notch

Depth

or

Factory

Gain

controls.

5-6.

USE

OF

NOISE

LIMITER

(NL).

The

noise

limiter

is

an

IF-type

limiter

and

is

very

effective

in

reducing

impulse-type

noise

particularily

on

SSB

and

CWo

It

will

be

found

use-

ful

on

AM

as

well.

Recommended

use

is

as

fol-

ows:

For

CW

Operation:

The

noise

limiter

should

be

on

at

all

times

for

elimination

of

impulse

noise

and

key

clicks.

For

SSB

Operation:

Use

the

noise

limiter

as

noise

condi-

tions

dictate.

For

AM

Operation:

Use

the

noise

limiter

as

noise

condi-

tions

dictate.

It

will

be

noticed

that

the

noise

limiter

will

introduce

consi-

derable

distortion

on

a

fully

modu-

lated

AM

Signal.

Distortion

may

be

reduced

by

decreasing

the

RF

GAIN

control

setting.

Signal

Crystal Crystal

Frequency Frequency

Type

85

KC

to

500

KC

6.5 MC

CR-18/U

500

KC

to

1.0

MC 7.0 MC

CR-18/U

1.0

MC to

1.5

MC 7.5 MC

CR-18/U

1.5

MC

to

2.0 MC

8.0

MC

CR-18/U

2.0 MC to 2.5 MC

8.5

MC

CR-18/U

2.5 MC to

3.0

Me

9.0

MC

CR-18/U

3.0

MC

to

3.5

MC 9.5 MC

CR-18/U

3.5 MC

to

4.0

MC -- --

4.0

MC

to

4.5

MC

10.5

MC

CR-18/U

4.5 MC

to

5.0

MC

11.0

MC

CR-18/U

5.0 MC

to

5.5 MC 11.5 MC

CR-18/U

7.0 MC

to

7.5 MC

-- --

7.5 MC

to

8.0

MC

14.0

MC

CR-18/U

8.0

MC

to

8.5

MC

14.5

MC

CR-18/U

8.5

MC

to

9.0

MC

15.0

MC

CR-18/U

9.0

MC

to

9.5 MC

15.5

MC

CR-18/U

9.5 MC

to

10 MC

--

--

10 MC to

10.5

MC

16.5

MC

CR-18/U

10.5 MC

to

11

MC

17.0

MC

CR-18/U

11

MC

to

11.5

MC

17.5

MC

CR-18/U

11.5 MC

to

12 MC

18.0

MC

CR-18/U

12 MC

to

12.5

MC

18.5

MC

CR-18/U

5-7.

GENERAL

COVERAGE

OPERATION.

The

Model

SX-117

Receiver

may

be

used

on

most

frequencies

from

85

KC

to

30.0

MC

by

inserting

the

correct

heterodyne

crystals

into

the

auxiliary

oscillator

sockets.

The

frequencies,

whose

use

is

not

recommended,

are

1600 KC,

1650 KC, 1700

KC

and

the

5.5-MC

to

7.0-MC

range.

In

the

low

frequency

range

(i.

e.,

85

KC

to

3.0

MC),

an

external-tuned

circuit

(Model

HA-I0)

should

be

connected

between

the

antenna

and

the

LF

INPUT

jack

(see

figure

19).

NOTE

In

primary

service

areas

of

high-

power

broadcast

stations,

good

re-

sults

can

be

obtained

by

connecting

an

antenna

directly

to

the

LF

INPUT

jack.

The

following

chart

contains

the

informa-

tion

needed

to

cover

the

85-KC

to

30-MC

range:

Crystal

Selector

Preselector

Dial

Band

&

Socket

Calibration

Scale

Selector

1

or

2

Use

Black

LF

1

or

2

Red

LF

1

or

2

Model

Black

LF

1

or

2

Red

LF

1

or

2

HA-I0

Black

LF

1

or

2

Red

LF

1

or

2 1

Black

3.5

Normal

§]

Red

3.5

1

or

2 7

Black

3.5

1

or

2 2

Red

7.0

1

or

2 3

Black

7.0

Normal

@:2]

Black

7.0

1

or

2 7 Red

7.0

1

or

2

7-1/2

Black

7.0

1

or

2 8

Red

7.0

1

or

2

8-1/2

Black

7.0

Normal

9

Red

7.0

1

or

2

9-1/2

Black

7.0

1

or

2

4-1/2

Red

14

1

or

2 5

Black

14

1

or

2

5-1/2

Red

14

1

or

2 6

Black

14

-12-

Crystal

Signal

Crystal Crystal

Selector

Preselector

Dial

Band

Frequency

Frequency

Type

&

Socket

Calibration

Scale

Selector

-f-------

1---

12.5 MC

to

13 MC

19.0

MC

CR-18/U

1

or

2

6-1/2

Red 14

13 MC

to

13.5 MC

19.5

MC

CR-18/U

1

or

2 7

Black

14

13.5 MC

to

14 MC 20.0 MC

CR-18/U

1

or

2 7 Red 14

14

MC

to

14.5 MC -- --

Normal

~

Black

14

14.5 MC to 15 MC 21.0 MC

CR-23/U

3

or

4

7-1/2

Red

14

15 MC

to

15.5 MC 21.5 MC

CR-23/U

e

or

4

7-1/2

Black

14

15.5 MC to 16 MC 22.0 MC

CR-23/U

3

or

4 8

Red

14

16 MC

to

16.5 MC 22.5 MC

CR-23/U

3

or

4 8

Black

14

16.5 MC

to

17 MC 23.0 MC

CR-23/U

3

or

4

8-1/2

Red

14

17M

C

to

17.5 M C 23.5 MC

CR-23/U

3

or

4

8-1/2

Black

14

17.5 M C

to

18 M C 24.0 MC

CR-23/U

3

or

4 9

Red

14

18

MC

to

18.5 MC 24.5 MC

CR-23/U

3

or

4 7

Black

21

18.5 MC to 19 MC 25.0 MC

CR-23/U

3

or

4 7

Red

21

19 MC

to

19.5 MC 25.5 MC

CR-23/U

3

or

4

7-1/2

Black

21

19.5

MC

to

20

MC 26.0 MC

CR-23/U

3

or

4

7-1/2

Red

21

20

MC

to

20.5 MC 26.5 MC

CR-23/U

3

or

4 8

Black

21

20.5 MC

to

21

MC 27.0 MC

CR-23/U

3

or

4 8

Red

21

21

MC

to

21.5 MC -- --

Normal

~

Black

21

21.5 MC

to

22

MC 28.0 MC

CR-23/U

3

or

4

8-1/2

Red

21

22

MC to 22.5 MC 28.5 MC

CR-23/U

3

or

4

8-1/2

Black

21

22.5 MC

to

23

MC 29.0 MC

CR-23/U

3

or

4 9

Red

21

23

MC

to

23.5 MC 29.5 MC

CR-23/U

3

or

4 9

Black

21

23.5 MC

to

24 MC

30.0

MC

CR-23/U

3

or

4

9-1/2

Red

21

24 MC to 24.5 MC 30.5 MC

CR-23/U

3

or

4

9-1/2

Black

21

24.5 MC

to

25 MC

31.0

MC

CR-23/U

3

or

4

7-1/2

Red

28.0

25

MC to 25.5 MC 31.5 MC

CR-23/U

3

or

4 8

Black

28.0

25.5 MC

to

26

MC

32.0

MC

CR-23/U

3

or

4 8

Red

28.0

26

MC

to

26.5 MC 32.5 MC

CR-23/U

3

or

4

8-1/2

Black

28.0

26.5 MC

to

27

MC

33.0

MC

CR-23/U

3

or

4

8-1/2

Red

28.0

27

MC

to

27.5 MC

33.5

MC

CR-23/U

3

or

4 9

Black

28.0

27.5 MC

to

28

MC

34.0

MC

CR-23/U

3

or

4 9 Red 28.0

28

MC

to

28.5 MC

--

--

Normal

[!Q]

Black

28.0

28.5 MC

to

29

MC

--

--

Normal

[Q]

Red

28.5

29 MC

to

29.5 MC

--

--

Normal

[Q]

Black

29.0

29.5 MC

to

30 MC

--

--

Normal

[!Q]

Red

29.5

-13-

Crystals

for

General

Coverage

Operation

should

be

ordered

through

an

authorized

Halli-

crafters

Dealer,

allowing

reasonable

time

for

delivery.

Because

of

the

large

quantity

of

crystal

required

to

satisfy

varied

user

requirements,

neither

The

Hallicrafters

Company

nor

its

dealers

will

normally

stock

crystals

for

general

coverage

service.

Substitution

of

crystal

types

other

than

specified

should

be

avoided.

Proper

operation

and

frequency

correlation

is

dependentonprecise

characteristics

of

the

CR-18/U

and

CR-23/U

types

as

listed.

NOTE

Those

crystals

which

are

shipped

with

the

Model SX-117

Receiver

and

the

ad-

ditional

10-meter

and

WWV

crystals

are

available

at

The

Hallicrafters

Company. See

the

Service

Repair

Parts

List

for

part

numbers

of

these

crystals.

5-8.

USE·

OF

VFO

AS

CRYSTAL-LOCKED

OSCILLATOR.

The

VFO

(variable

frequency

oscillator)

may

be

used

as

a

crystal-controlled

oscillator

for

fixed-frequency

operation.

This

may

be

accomplished

as

follows:

1.

Insert

a

4.5-MCtypeCR-18/Ucrystal

in

the

VFO

crystal

socket,

SOL

2. Add 6.15

megacycles

(IF

frequency)

to

the

desired

signal

frequency.

This

will

determine

the

heterodyning

crystal

frequency.

3.

4.

5.

6.

If

the

heterodyning

crystal

frequency

is

20 MC

or

less,

specify

type

CR-

18/U

and

insert

in

auxiliary

oscillator

crystal

socket

1

or

2.

If

the

heterodyning

crystal

frequency

is

more

than

20 MC,

specify

type

CR-23/U

and

insert

in

auxiliary

os-

cillator

crystal

socket

3

or

4.

The

PRESELECTOR

calibration

and

BAND

SELECTOR

setting

may

be

de-

termined

from

the

general-coverage

chart

(paragraph

5-7).

The

VFO

dial

should

be

set

at

approx-

imately

375. Slight

frequency

warping

may

be

achieved

by

moving

the

dial

slightly

from

this

point.

Example

1 -

The

desired

signal

frequency

is

12.950 MC;

the

heterodyning

crystal

frequency

is

12.950 MC + 6.15 MC =19.100 MC.

From

the

gen-

eral-coverage

chart,

it

can

be

determined

that,

for

a

signal

frequency

of 12.950 MC,

the

PRE-

SELECTOR

should

be

set

at

6

1/2

and

the

BAND

SELECTOR

should

be

at

14.

The

correct

crystal

would

be

a

19.100-MC

type

CR-18/U

crystal

in-

serted

in

either

crystal

socket

1

or

2.

Example

2 -

The

desired

signal

frequency

is

18.4 MC;

the

heterodyning

crystal

frequency

is

18.4

MC + 6.15 MC = 24.55MC.

From

the

general

coverage

chart,

it

can

be

determined

that,

for

a

signal

frequency

of

18.4

MC,

the

PRESELECTOR

should

be

set

at

7

and

the

BAND

SELECTOR

at

21.

The

correct

crystal

would

be

a

24.55-MC

type

CR-23/U

crystal

inserted

in

either

crystal

socket

3

or

4.

SECTION

VI

ALIGNMENT

6-1.

GENERAL.

Alignment

should

not

be

attempted

until

all

other

possible

causes

of

faulty

operation

have

been

exhausted.

NOTE

Do

not

make

any

adjustments

unless

the

operation

of

this

receiver

is

fully

understood

and

adequate

test

equip-

ment

is

available.

6-2.

TEST

EQUIPMENT

REQUIRED.

1. Signal

generator

with

50-KC

to

30-MC

coverage,

a

calibrated

output

level

meter,

and a

50-ohm

termination.

-14-

2.

Vacuum

tube

voltmeter

(VTVM).

3. Output

meter

(or

AC

scale

of VTVM).

If

a VTVM

is

used,

connect

it

to

terminals

500

and

G and

terminate

the

output with a

500-ohm,

2-watt,

dummy

load.

4.

9.5-MC

and

18-MC

type

CR-18/U

cry-

stals.

5.

Alignment

tool,

such

as

GENERAL

CEMENT #8606, and a

small

screwdriver.

6-3.

INITIAL

CONTROL

SETTINGS.

BAND

SELECTOR.

As

indicated

in

chart.

AUDIO AND

RF..

10

(maximum).

GAIN

ANTENNA

MIXER

V3

12AT7

:n

<Q

YI

c:

THROUGH

.,

Y9

~

:0

TI

-4

V4

0

6BA6

"0

$

T2

~

.!...

~

Y301

v.

0

-.

CI5A,B

~

~

C301

"

~

VI4

<

6AU6

~

.,

CI5C,D

Ii

*

VI3

:r

Q 6EAS

VI

VI

AUXILIARY

VI

OSC

. TUBE

NOTE

:

*

NOT

SUPPLIED

L10B VI V2

LIIB

L13B L12B

L 7 L2

L6

L5

L10A 6DC6 6EAS TIO

Ll4

LilA

L13A L12A

CII7

CI5E,F

501

R21

METER

ZERO

R55

NOTCH DEPTH

T6

V9

6BA6

T5

T7

va

6EAS

T8

YIO,YII

T4

V7

6DC6

VII

68E6

VIO

6BN8

VI2

6GWS

T3

V5

68E6

T9

RI9

FACTORY

GAIN

092-016681

SELECTIVITY

..••

As

indicated

in

chart.

FUNCTION

•.••••

AM

TUNING. • • • • • • • As

indicated

on

chart.

NOTCH

•......•

OFF.

XT

AL

CAL-NL

.••

OFF.

6-4.

ALIGNMENT

PROCEDURE.

Signal

Generator Generator

step

Connections

Frequency

1 High

side

directly

50.75

KC

un-

to

Pin

2 of

V8

mod.

(critical)

Band

BFO

.•.••••.•.

0

(center

point).

IMPORTANT

To

remove

top

cover,

turn

screws

approximately

one

quarter

turn

coun-

terclockwise.

Do not

attempt

to

remove

screws.

Output

Connections

Selectivity

80

Meters

VTVM

DC

probe

0.5

KC

to

Pin

6 of

VI0

Adjust top

cores

of T5,

T6,

T7, and T8

for

maximum

indication. Reduce

generator

output

as

necessary

to

maintain

approximately

a

I-volt

reading

on VTVM. (Use

screwdriver.)

2 High Side

directly

1650 KC, 400 80

Meters

Output

meter

5.0

KC

to

Pin

7 of

V5

cycles,

30%

across

appro-

mod.

priate

speaker

output

terminals

Slowly

tune

generators

through

1650

KC

to

determine

center

of

IF

passband.

Set

generator

at

center

of

IF

passband

and

adjust

generator

output

to

maintain

approximately

a

1/2-watt

receiver

output.

Adjust top and

bottom

cores

of T3 and T4

for

maximum

receiver

output.

3 High

side

directly

6.050 MC, 400 80

Meters

Output

meter

5.0

KC

to

Pin

2 of

V2

cycles,

30%

across

appro-

mod.

priate

speaker

output

terminals

Adjust

receiver

tuning

until

a

signal

is

heard

at

approximately

3.95 MC. Adjust top

cores

of

Tl

and T2

for

maximum

receiver

output.

4 High

side

directly

6.45

MC

mod. 80

Meters

Output

meter

5.0

KC

to

Pin

2 of

V2

across

appro-

priate

speaker

output

terminals

Adjust

receiver

tuning

until

a

signal

is

heard

at

approximately

3.55 MC. Adjust

middle

and

rear

trimmers

C15B and C15D

for

maximum

receiver

output.

Repeat

core

and

trimmer

adjustments

until

no

further

increase

in output

is

noted.

6-5.

ADJUSTMENT

OF

CRYSTAL-

CONTROLLED

FIRST

CONVERSION

OSCILLATOR.

All of

the

coil

forms

in

this

group,

except

the

WWV

coil,

have two

separate

coils

and two

-16-

separate

adjustments

(i.e.,

80 M and 10

M-l,

40 M and 10

M-2,

etc).

In

all

cases,

the

top

core

will

be

the

low

frequency

adjustment

and the 10 M

adjustment

will

be

the

bottom

core

(see

figure

10). All

adjustments

may

be

made

from

the

top

or

bottom

of

the

chassis

when

using

an

alignment

tool

such

as

General

Cement's

No. 8606.

80M

20M

10-1

IONl-4

0

40Nl

0

IOM-2

0 15M

WWV

IONl-3

0 0

O'I-Ollen

Figure 10.

Crystal

Oscillator

Coil Locations.'

Connect

a VTVM

(set

to

read

negative

DC

voltage

on

10-volt

scale)

at

point

where

R30

(1

megohm)

connects

to

terminal

strip

near

V2.

Starting

with

80 M,

adjust

each

core

in

order

of

increasing

frequency,

for

maximum

voltage

in-

dication

as

the

BAND

SELECTOR

switch

is

ad-

vanced

through

the

various

ranges.

NOTE

After

all

adjustments

have

been

made,

it

is

permissible

to

warp

the

crystal

frequency

by

rotating

the

appropriate

core

slightly

to

allow

more

accurate

band-to-band

calibration,

consistent

with

positive

oscillator

start

as

the

BAND

SELECTOR

is

rotated

through

each

range.

6-6.

PRESELECTOR

ALIGNMENT.

'

To

align

the

PRESELECTOR,

9.5-MC

and

18.0-MC

type

CR-18/U

crystals

will

be

required.

Insert

the

9.5-MC

crystal

in

Auxiliary

Oscillator

socket

No. 1 and

the

18-MC

crystal

in

Auxiliary

Oscillator

socket

No.2.

Step 1

a.

Set

generator

frequency

to

3.0 MC.

b. Set

receiver

TUNING

dial

to

O.

c.

Set

BAND

SELECTOR

to

3.5.

d. Set

PRESELECTOR

to

0 (Maximum

capacity).

e.

Set

XTAL

SELECTOR

to 1.

f.

Connect

generator

to

antenna

input.

Adjust

L5

(antenna

coil) and L6

(mixer

coil)

for

maximum

receiver

output.

-17-

Step 2

a. Set

generator

frequency

to

11.5 MC.

b.

Leave

receiver

TUNING

dial

at

O.

c.

Set BAND

SELECTOR

to 7.0.

d.

Set

PRESELECTOR

to

10 (Minimum

capacity).

e. Set XT

AL

SE LE CTOR

to

2.

Adjust

trimmers

C3B and

C3Dfor

maximum

receiver

output.

Repeat

steps

1 and 2

until

no

further

in-

crease

in

output

is

noted.

Step 3

a.

b.

c.

d.

Set

generator

to

28.0 MC.

Leave

TUNING

dial

at

O.

Set

PRESELECTOR

pointer

to

right

edge

of 10 M

calibration

block.

Set

BAND

SELECTOR

to 28.0 MC.

e. Set

XTAL

SELECTOR

to

normal.

Adjust

L2 and L7

(antenna

and

mixer

shunt

coils)

for

maximum

receiver

output.

6-7.

ALIGNMENT

OF IF TRAP.

Controls

should

be

set

as

follows:

RF

GAIN

......•

10

AUDIO GAIN

•...•

10

FUNCTION

..•..•

AM

NOTCH

.•....•.

OFF

XT

AL

CAL-NL

...

OFF

XTAL

SELECTOR.

Normal

BAND SE LECTOR . 7.0

TUNING

••.....

7.1 MC

PRESELECTOR

.•.

Peak

on

7.1-MC

sig-

nal.

a.

Connect

generator

to

antenna

input.

b.

Set

generator

frequency

to

6.4 MC

and

increase

output

level

approximately

50 DB

above 1

microvolt.

C38

XV6

XV4

XV5

R55

NOTCH

DEPTH

::!'!

L22

BFO

IQ

c:

XVI3

..,

~

VFO COIL

LI6

:-

T3

1650

KC

IF

~

0

-

-

XVI2

0

3

XVIO

<:

!..

~.

SIC

00

~

I

0

XV3

XVII

......

S5

;10

~

,.,

SID

~

S4A

<

~

..,

SIB

XV8

(')

::r

Q

'"

C3C

'"

S4B

~.

C3A

XV9

LlA,B

SIA

XVI

XV2

XV?

CI07

T4

1650

KC

IF

6.4MC

TRAP

092-016682

c.

Adjust

both

cores

in

L1

(IF

Trap)

for

mInImUm

receiver

audio output.

Repeat

adjust-

ments

until

no

further

decrease

in

output

is

ob-

tained.

6-8.

VFO

CALIBRATION

ALIGNMENT.

If

the

electrical

index

check

at

the

100-KC

check

points

on

all

bands

shows

that

the

calibra-

tion

marks

consistently

fall

to

one

side

of

the

pOinter,

a

trimmer

adjustment

is

indicated.

(This

will

be

necessary

only

if

the

calibration

is

beyond

tuning

range

of

the

CAL

RESET

control.)

Proceed

as

follows:

a.

Adjust

TUNING

until

dial

is

at

500 (3.5

MC).

b.

Set

BAND

SELECTOR

at

3.5,

FUNC-

TION

to

USB,

SELECTIVITY

to

2.5,

and

XTAL

CAL

to

ON.

c.

Carefully

adjust

C15F

(fronttrimmer

on

top

of

three-section

gang)

in

very

small

incre-

ments

until

zero

beat

is

heard.

Care

should

be

exercised

to

make

sure

that

the

correct

100-KC

beat

note

is

tuned

in

with

the

trimmer.

d.

Check

across

the

dial

at

the

100-KC

check

points.

If

the

frequency

error

is

less

than

3000

CPS,

the

calibration

is

within

acceptable

limits.

If

the

error

at

the

high

frequency

end

of

the

dial

(4.0 MC)

is

greater

than

3000

CPS,

the

VFO

may

require

a

coil

adjustment

in

addition

to

the

trimmer

adjustment.

6-9.

CONDITIONS

REQUIRING

COIL

AND

TRIMMER

ADJUSTMENT.

If

the

dial

error

progressively

increases

in

the

same

direction

with

the

high

frequency

end

running

out

more

than

3000

CPS,

both

L16

and

C15 F

should

be

adjusted.

a.

Tune

dial

to 1000 (4.0 MC)

and

adjust

L16

to

zero

beat.

b.

Tune

dial

to

500 (3.5 MC)

and

adjust

C15F

to

zero

beat.

c.

Repeat

steps

a

and

b

until

both

3.5 MC

and

4.0

MC

are

exactly

on

frequency.

d.

Check

across

the

dial

at

the

100-

KC

points.

If

the

frequency

error

is

less

than

3000

CPS,

the

calibration

is

within

acceptable

limits.

If

the

error

is

in

excess

of 3000

CPS

at

any of

the

mid-points,

with

the

end

limits

at

zero

error,

the

VFO

capacitor

should

be

knifed.

This

operation

should

not

be

attempted

by

other

than

qualified

per-

sonnel

thoroughly

familiar

with

the

technique.

-19-

NOTE

When

the

VFO

dial

is

at

3.5

MC,

the

VFO

frequency

should

be

4.85 MC.

With

the

VFO

dial

set

at

4.0

MC,

the

VFO

frequency

should

be

4.35 MC.

6-10.

ADJUSTMENT

OF

FACTORY

GAIN

METER

CONTROL.

Controls

should

be

set

as

follows:

AUDIO GAIN

.........

0

RF

GAIN

...........

10

FUNCTION

........•.

AM

SELECTIVITY

.......

2.5

KC

TUNING

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

14.3 MC

BAND SE

LE

CTOR . . . . . 20 M

NOTCH

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

OFF

XT

AL

CAL-NL

.......

OFF

a.

Connect

signal

generator

to

the

an-

tenna

input.

Set

generator

output

level

to

50

mi-

crovolts

unmodulated

and

tune

to

14.3

MC.

b.

Carefully

adjust

TUNING

for

maxi-

mum

S-Meter

deflection

and

peak

PRESELEC-

TOR.

c.

If

S-Meter

does

not

read

S9,

adjust

Factory

Gain

control

for

correct

reading.

d.

Turn

RF

GAIN

control

to

0

and

check

for

electrical

zero

at

left

end

of

meter

scale.

e.

Adjust

Meter

Zero

control

as

neces-

sary

and

repeat

the

above

steps

until

the

meter

reads

S9

with

the

RF

GAIN

control

at

10

and

0

with

the

RF

GAIN

control

at

O.

6-11.

BFO

FREQUENCY

ADJUSTMENT.

The

beat

frequency

oscillator

(BFO)

has

been

adjusted

at

the

factory

so

that

its

frequency

is

exactly

50

KC

when

the

BFO

knob

is

set

at

O.

A

slight

readjustment

may

be

necessary

occasion-

ally

because

of

normal

component

aging.

To

deter-

mine

if

adjustment

is

required,

proceed

as

follows.

With

the

SELECTIVITY

control

at

5 KC,

FUNCTION

at

USB,

XTAL

CAL.

at

ON,

and

PITCH

control

at

0,

adjust

TUNING

to

zero

beat

at

any

100-KC

check

point.

Leaving

the

receiver

TUNING

unchanged,

switch

the

FUNCTION

switch

to LSB.

If

the

beat

oscillator

frequency

is

correct,

zero

beat

will

be

maintained

in

both

the

USB

and

LSB

positions.

If

the

beat

oscillator

is

off

fre-

quency, a

beat

note will

be

heard

when

switching

from

USB to LSB.

Adjustment

of

the

oscillator

is

recommended

only if

the

frequency

of

the

aud-

ible

beat

note

exceeds

200

CPS

with

the

BFO

knob

at

O.

NOTE

In

instances

where

the

beatfrequency

oscillator

is

considerably

off

fre-

quency,

it

may

not

be

possible

to

ob-

tain

a

zero

beat

when

tuning

through

a

signal.

If

this

is

the

case,

it

will

be

necessary

to

roughly

set

the

BFO

to

50

KC

as

follows:

Set

SELECTIVITY

to

0.5

KC, FUNCTION

to

USB, and

tune

receiver

to a

noisy

part

of

band

(not

to

a

signal).

Remove

the

BFO

knob and

adjust

the

BFO

slug

for

min-

imum

noise.

Set

the

SELECTIVITY

control

to 5

KC

and

make

the

BFO

fre-

quency

check

as

outlined

above.

If

the

BFO

frequency

check

indicates

adjust-

ment

is

necessary,

proceed

as

follows:

a.

Remove

the

BFO

control

knob,

turn

the

BFO

slug

a few

degrees

in

the

direction

that

lowers

the

beat

note

frequency,

and

repeat

the

BFO

frequency

check.

b. Continue

varying

thp.

setting

of

the

slug

in

small

steps

and

repeat

the

BFO

frequency

check

until

zero

beat

is

obtained

in

both

USB

and

LSB pOSitions.

c.

After

the

correct

slug

setting

has

been

determined,

replace

the

BFO

knob with 0

in

the

top

center

position,

being

careful

not

to

disturb

the

slug

setting.

6-12.

NOTCH

FREQUENCY

AND

DEPTH

A

DJ

UST

MENTS.

Readjustment

of

the

notch

filter

circuit

is

not

normally

necessary

unless

the

components

in

the

notch

circuit

are

replaced.

To

check

the

cir-

cuit,

proceed

as

follows:

a.

Check

the

BFO

frequency

as

pre-

viously

described

so

that

zero

beat

is

maintained

in

either

sideband

position.

b. Set FUNCTION to USB, SELECTIVITY

to 2.5 KC, and tune

in

an

unmodulated

Signal

(strength

approximately

S9)

to

zero

beat.

c. Tune NOTCH

control

for

minimum

audio

output.

d.

Adjust

notch

depth

(on top

of

chassis,

right

side

of

VFO)

for

further

decrease

in

audio

output.

e.

Repeat

steps

c and d

until

no

further

decrease

in

audio output

is

noted. At

this

point,

the

notch

frequency

should

indicate

50

KC.

If

the

notch

frequency

does

not

indicate

50

KC

with

the

receiver

at

zero

beat

as

described

above,

loosen

knob and

reset

it

to

50

KC.

6-13.

CRYSTAL

CALIBRATOR

ADJUSTMENT.

The

crystal

adjust

trimmer

is

used

to

ad-

just

the

100-KC

crystal

exactly

to

frequency

by

comparison

with

the

10-MC

signal

transmitted

by

WWV.

a. Set

all

receiver

controls

for

AM

re-

ception,

set

BAND

SELECTOR

to WWV, and

adjust

TUNING

to

WWV

signal.

b.

During

the

period

of no

signal

modu-

lation,

turn

XT AL CAL.

ON

and

carefully

set

the

crystal

adjust

so

that

the

crystal

calibrator

zero

beats

with

the

signal

received

from

WWV.

NOTE

If

this

adjustment

is

attempted

during

periods

that

WWV

is

modulated,

an

erroneous

zero

beat

may

be

obtained

with

the

modulating

frequency

instead

of

the

desired

carrier

frequency.

SECTION

VII

SERVICE

DATA

7-1.

SO.7S-KC

IF

SYSTEM,

Figure

12

shows

the

type

of

coupling

used

in

the

50.75-KC

IF

system.

Note

that

inductive

coupling

is

avoided

by

careful

shielding

of

the

IF

coils

and

signal

transfer

occurs

only

through

ca-

pacitance

and

resistance.

By

increasing

the

value

of

"C"

and

decreasing

"R",

the

selectivity

is

made

-20-

sharper;

by

decreasing

"C"

and

increasing

"R",

the

selectivity

is

made

broader.

The

proper

values

of

"C"

and

"R"

are

switched

in

the

circuit

by

means

of

the

SELECTIVITY

control.

"R"

varies

the

"Q"

of

the

tuned

circuit

and

"C"

varies

the

coupling.

This

R-C

coupling

arrangement

affords

a

more

accurate

means

of

selectivity

control

than

that

readily

obtainable

by any

other

method.

VS

3RD MIXER

6EAS

R

I

s+

V9

50.75

KC

IF

AMPLIFIER

6BA6

S+

I R

VIO

DETECTOR

089-003026

Figurel2.

Equivalent

SchematicDiagramofthe

SO.7S-KC

IF

System.

7

-2.

CHASSIS

REMOV

AL.

Most

service

work

can

be

accomplished

by

removing

the

top

and

bottom

plates

from

the

cabi-

net.

The

top

plate

(cover)

may

be

removed

by

turning

the

four

screws

approximately

one

quarter

turn

counterclockwise.

Do

not

attempt

to

remove

the

screws.

The

bottom

plate

may

be

removed

by

com-

pletely

removing

the

four

screws

in

the

corners

of

the

bottom

plate.

The

chassis

may

be

removed

by

removing

the

four

outer

screws

in

the

cabinet

bottom

and

sliding

the

chassis

forward

through

the

cabinet

front.

7-3.

SERVICE

OR

OPE

RATING

QUESTIONS.

For

further

information

regarding

operation

or

servicing

of

the

Model SX-117

Receiver,

con-

tact

the

dealer

from

whom

the

unit

was

purchased.

The

Hallicrafters

Company

maintains

an

extensive

system

of

Authorized

Service

Centers

where

any

required

service

will

be

performed

promptly

and

efficiently

at

no

charge

if

this

equipment

is

de-

livered

to

the

service

center

within

90

days

from

-21-

date

of

purchase

by

the

original

buyer

and

th

e

defect

falls

within

the

terms

of

the

warranty.

It

is

necessary

to

present

the

bill

of

sale

in

order

to

establish

warranty

status.

Mter

the

expiration

of

the

warranty,

repairs

will

be

made

for

a

nominal

charge.

All

Hallicrafters

Authorized

Service

Centers

display

the

sign

shown below.

For

the

location

of

the

one

nearest

you,

consult

your

dealer

or

your

local

telephone

directory.

Make

no

service

shipments

to

the

factory

as

The

Hallicrafters

Com-pany

will

not

accept

respon-

sibility

for

unauthorized

shipments.

The

Hallicrafters

Company

reserves

the

privilege

of

making

revisions

in

current

produc-

tion

of

equipment

and

assumes

no

obligation

to

incorporate

such

revisions

in

earlier

models.

c

.......

unlc.ti.ns

equlp

...

ent

::n

co

c:

~

NOTES'

L

20,000

OHMS

PER

VOLT

METER uc;l:J

FOR

MEASUREM£NTS.

2.

CONTROl

SETTlf\Jr~:

A.

AF

AN9

RF GAIN

caNTRa~S

MAXIMUM

COUNTER CLOCKWISE(CCW) UNLESS

OTHERWISE NOTED.

B. BAND SELECTOR,FUNCTION

AND

SELECTIVITY

CONTROL SETTINGS NOT CRITICAL UNLESS

OTHERWISE NOTED.

C.

XTAL SELECTOR CONTROL NORMAL UNLESS

OTHERWISE NOTED.

AUXIL

IARY CRYSTAL OSCILLATOR,

CATHODE FOLLOWER

VI3

*SEA8

3. ALL

VOLTAGES

POSITIVE

i+)

UNLESS OTHERWISE NOTED.

*

USE

HEWLETT-PACKARD HP-410B

OR

EQUIVALENT

FOR

THIS

VOLTAGE.

VFO

CATHODE FOLLOWER

V6

6EA8

6.3

VAC

145

IF

AMPLIFIER

6-MC

TO

6.5MC

V4

68A6

VI3

I

I

I

I

I

I

i D V

IOO-KC

CRYSTAL

CALIBRATOR SOCKET

J3

AMATEUR- BAND

CRYSTAL OSCILLATOR

L

WWV

-0.3

o

V3

12AT7

ALL OTHERS

168

1.3

FIRST MIXER,

CATHODE FOLLOWER

V2

SEA8

(CAL

ON)

6.3

VAC

J3

RF AMPLIFIER

VI

6DC6

I

V4

I I

: D I

L

_____________

...J

V3

D

( )

V2

----

C

__

)

VI

1650-KC

IF

AMPLIFIER

V7

6DC6

RF

GAIN

~I

MAX

CCW~AX

CW

~

18.5

1.6

18.5

1.6

[13

168

168 152

D

V7

0

VI2

VIO

VII

0 0 o

j

0

o

V9

0

THIRD MIXER

SSB-SWITCHING

CRYSTAL

OSCILLATOR

V8

6EAS

6.3

VAC

120

165

SECOND MiXER

V5

68E6

AM

DETECTOR,

AVC

AMPLIFIER,

AVC RECTIFIER

VIO

68N8

FIRST

AUDIO AMPLIFIER,

AUDIO OUTPUT

VI2

6GW8

PRODUCT DETECTOR

8FO

VII

6BE6

~

F

AMPLIFIER

50.75-KC

V9

6eA6

6.3

VAC

~

IS.5

---

0.75

18.5

---

0.75

140

60

160

---

135

57

092-0166848

:n

CQ

c:

.,

CD

~

,

lIO

"J

CD

W

III

,

III

Q

::J

n

CD

()

:r

Q

~

NOTES:

20,000

OHMS

PER

VOLT METER

USED

FOR

MEASUREMENTS.

2. CONDITIONS'

A. RECEIVE -STANDBY JUMPER

IN

PLACE.

B.

SWITCH POSITIONS:

XTAL

SELECTOR-

NORMAL

NL

-OFF

FUNCTION

-AM

SELECTIVITY

-5.0

RF

GAIN

-10

AUDIO GAIN

-10

BAND

SELECTOR-

3.5

"NOT

SUPPLIED

AUXILIARY

CRYSTAL OSCILLATOR,

CATHODE FOLLOWER

VI3

* SEA8

IOO-KC

CRYSTAL

CALIBRATOR

SOCKET

J3

~

AMATEUR-

BAND

CRYSTAL OSCILLATOR

V3

12AT7

FIRST

MIXER,

CATHODE FOLLOWER

V2

SEAS

INF

o

0.180

2

MEG

VI3

J3

./

RF

AMPLIFIER

VI

6DC6

I

I

I

I

I

I

I

I

I

I

I

I

I

5aOK

47

K

VFO

CATHODE FOLLOWER

VS

SEAS

D

V4

:

D:

L

_____________

-1

V3

D

V7

D D

C~)

V2

C_)

VI

IS50-KC

IF

AMPLIFIER

V7

6DC6

D

I F

AMPLIFIER

S-MC

TO

S.5MC

V4

6BAS

VI2

VIO

VII

D D

V8

D

D

V9

D

THIRD MIXER

SSB-SWITCHING CRYSTAL OSCILLATOR

V8

SEAS

SECOND MIXER

V5

SBES

AM

DETECTOR,

AVC

AMPLIFIER,

AVC

RECTIFIER

VIO

SBNS

FIRST AUDIO

AMPLIFIER,

AUDIO OUTPUT

VI2

SGW8

PRODUCT DETECTOR

BFO

VII

SBE6

IF

AMPLIFIER

50.75-KC

V9

SBAS

092-016685

B

092-017

1

08

L

______________

~

Figure

15.

Hal/icrafters'

Model

HA-lO,

LF/MF

Tuner.

SECTION

VIII

LF/MF

TUNER

MODEL

HA-10

8-1.

DESCRIPTION.

The

Model

HA-10

is

an

optional

plug-in

accessory

to

be

used

with

the

Model

SX-117

Receiver

for

extending

the

tuning

range

from

3.0

MC

to

85

KC.

TO

TRANSMITTING

ANTENNA

A

five-position

switch

is

provided

to

select

the

following

ranges:

OFF

85

KC

to

200 KC.

200

KC

to

500 KC.

500

KC

to

1200 KC.

1200

KC

to

3.0

MC.

L..J

CHANGEOVER

RELAY

(COAXIAL

CABLE)

I

LI

HA-IO

~ANTENNAINPUT

,~L.F

.

INPUT

)

I.......J

~

~

SX-117

The

OFF

position

on

the

RANGE

switch

pro-

vides

straight-through

antenna

switching

so

that

the

common

station

antenna

system

may

be

used

for

both

low

and

high

frequency

reception.

See

figure

16.

Figure

16

.

Connecting

the

Model

HA-l0,

Using

a

Common

Antenna.

-24-

.......--TO

L.F.

ANTENNA

TO

TRANSMITTING

ANT.

CHANGEOVE R

RELAY

(COAXIAL

CABLE)

f "

NOT

CONNECTED

-L.F.

INPUT

~

~

~

~

~

HA-IO

SX-117

012-0"'11

Figure 17.

Connecting

the

Model

HA-IO,

Using

a

Separate

low-Frequency

Antenna.

If

desired,

separate

antennas

may

be

used

for

low

and

high

frequency

reception.

See

figure

17.

In

most

cases,

a

dipole

antenna

cut

for

7.0

MC

or

lower,

or

a

long-wire

antenna

will

give

satisfactory

results

over

the

tuning

range

of

the

Model

HA-10.

The

Model

HA-10

input

is

designed

to

accept

50-ohm

to

70-ohm

transmission

line.

However,

a

long-wire

antenna

may

be

used.

8-2.

OPERATION

OF

THE

MODEL

HA-10.

Proceed

as

follows:

a.

Connect

unit

to

a

Model

SX-117

Re-

ceiver

as

shown

in

figures

16

or

17.

b.

Install

desired

heterodyning

crystal

in

the

Model

SX-117

Receiver

and

position

XTAL

SELECTOR

switch.

HA-10

HA-10

SX-117

Range

Switch

Tuning Tuning

85-200

KC

o

(Maximum

Capacity)

80

KC

200-500

KC

o

(Maximum

Capacity)

195

KC

500-1200

KC

o

(Maximum

Capacity)

490

KC

1200-3000

KC

o

(Maximum

Capacity)

1175

KC

-25-

c.

Set

the

Model

SX-117

BAND

SELEC-

TOR

switch

to

LF

.

d.

Set

the

Model

HA-10 RANGE

switch

to

desired

range.

e.

Peak

the

Model

HA-10

TUNING

con-

trol

for

maximum

signal

output.

(Detune on

ex-

tremely

strong

signals.)

SX-117

Heterodyning

Desired

Signal

HA-10

RANGE

Crystal

Range

Switch

Frequency

85

KC-200

KC

85

KC-200

KC

6.5

MC

200 KC-500

KC

200

KC-500

KC

6.5

MC

500

KC-1000

KC

500

KC-1200

KC

7.0

MC

1000

KC-1200

KC

500

KC-1200

KC

7.5

MC

1200

KC-1500

KC

1200

KC-3000

KC

7.5

MC

1500

KC-2000

KC

1200

KC-3000

KC

8.0

Me

2000

KC-2500

KC

1200

KC-3000

KC

8.5

MC

2500

KC-3000

KC

1200

KC-3000

KC

9.0

MC

To

restore

the

Model

SX-1l7

Receiver

to

normal

high-frequency

operation,

the

Model

HA-10

RANGE

switch

should

be

set

at

OFF

and

the

Model

SX-117

XT

AL

SELECTOR

switch

returned

to

normal.

8-3.

ALIGNMENT

OF

THE

MODEL

HA-10.

Set

up

the

Model

SX-117

and

the

Model

HA-10

for

LF,

AM

operation

as

described

in

paragraphs

5-3

and

5-7,

using

correct

heterodyn-

ing

crystals

to

cover

the

frequencies

listed

below.

Generator

Frequency

into

HA-10

@ 400

CPS

Mod.

Adjustment

80

KC

Adjust

L204

for

max-

imum

receiver

output

195

KC

Adjust

L203

for

max-

imum

receiver

output

490

KC

Adjust

L202

for

max-

imum

receiver

output

1175

KC

Adjust

L201

for

max-

imum

receiver

output

TO

ANTENNA

r

J2

01

L

20

I

1200

3000KC

r

TO

L F

INPUT

J201

L20

4

L2

0 3

TO

SX -117

L

202

A

NTENNA

INPUT

L201

092-017109

Figure

18.

Internal

View

of

the

IF/MF

Tuner.

L202

500

1200KC

f

5201

FRONT

SWITCH

CCW SHOWN

IN

OFF

POSITION

.

L

203

200

500K

C f L

204

8 5

200KC

/

S

201

REAR

J202

TO

SXI17

ANTENNA

INPUT

(VIEWED

FROM

FRONT)

J

203

'---~--~-------T~~

C

202

TO

L

.F.

I N

PUT

/ /

/

-=

/

/ /

C 201

'1'

0.0047

...L

10%

L

____

~

0

89-003023

Figure

19.

Schematic

Diagram,

Model

HA

-IO Tuner.

-26-

Schematic

Symbol

C381

C303, 305

C304

P3

CR301

VB

Y301

R301, 304

R302

R303

J202,

203

C201

C202

L201

L202

L203

L204

J201

SERVICE REPAIR PARTS

LIST

lOO-KC

CRYSTAL

CALIBRATOR

Description

Assembly,

100-KC

Crystal

Marker

Capacitor,

Variable,

Trimmer,

8

jJ.jJ.F

to

50 jJ.,uF, N750,

Crystal

Calibrator

Adjustment

Capacitor,

0.01

jJ.F,

500V,

Ceramic

Disc

Capacitor,

82

jJ.

jJ.

F,

10%,

Mica

Connector,

Plug,

5-pin

Diode,

type

1N295

Electron

Tube,

type

6AU6

Marker

Crystal,

100-KC

Resistor,

220K

ohms,

10%,

1/2

watt

Resistor,

4.7K

ohms,

10%,

1/2

watt

Resistor,

lOOK

ohms,

10%,

1/2

watt

Shield,

Cover

Shield,

Tube

Socket,

Octal

Socket,

Tube

SERVICE REPAIR PARTS

LIST

MODEL

HA-10

Assembly,

LF/MF

Tuner

(Model HA-10)

Cabinet

Bottom

Cabinet

Cover

Cable

and

Plug

Assembly

Capacitor,

4700

J.1.J.1.F,

10%, 500V,

Ceramic

Disc

Capacitor,

Variable,

TUNING

Clamp,

Cable

Coil,

RF,

1200 KC

to

3.0

MC

Coil,

RF,

500 KC

to

1200 KC

Coil,

RF,

200 KC

to

500 KC

Coil,

RF,

100 KC

to

200 KC

Connector,

Phono

Foot,

Mounting

Iron

Core

(L201

through

L204)

Knob, TUNING

andRANGE

KC

Plate,

Switch

Mounting

Switch,

Rotary,

RANGE KC

Trim

Strip

-27-

Hallicrafter

s'

Part

Number

001-004394

044-200437

047-100224

470-213820

035-100038

019-301980

090-900808

019-202351

451-252224

451-252472

451-25210'i

069-001719

069-201191

006-200696

006-100759

001-004488

066-003736

066-003701

087-007651

047-001506

048-000535

076-202740

051-003540

051-003539

051-003538

051-003537

036-100041

016-200980

077-100260

015-001775

063-006054

060-002566

007-000816

NOTES:

LF

JI

ANT

':

AN

T

>,J..,2'e--T_-'c1-,

VI

6

DC6

L6

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

r---+-.

'+'

CI;Ol

L1A R F

AMPLIFER

R3

6 22K

R4

I

II

OC

1

1500

~

~1

620

UUF

---,

LIB

1

L5

C4

q1

~B~~:

L.

______

_

J3

UUF~~~---~C~5-1f--1

0.01

AVC

I

-~

1,kC7

2

~0.01

R F GAIN

B+

,kC9

~0.01

IOO-KC

CALIBRATOR

C30

IBAND

V2A

112

6EAS

4 3 2 1

10M

10M 10M

10M

15M

20M

40M

80M

WWV

TI

F I

RSTrM~1

X~E_R_---j:r-_I-

__

--:-i6.

0-6.5

r.:M,-,C'---~r--T---'

R5

61

I~~

't

r

--~-l

II

"-'0_0

__

"-I2~rI-",-,,-lr--'

L IlL

100'

CI5A

'\!7F--

--~!!~'

I CI58

R6

lOOK

-

R7

IK CI2

0.01

R9

330K

2 4 /

RIO

1500

C14~

0.02~

AVC

CI3

/

0.01 I

,

B+

,

ITUNINGI

L

_______________________

_

V4

6SA6

6MCIF

CI5C

CI5D

7

~6

IW

I I F I 2

,=

6

L'

~J3lL.::

I

_-c.!-'_UF, I

;="j'

,

"----+--,r--

I

2

'-'4

-'

, I

~

""3

--

,-.....

I\,

7 3

---"i--'

L

,6'1011[c~I~~M2~'-'0-0'l-I~'I--t----')~:~~\~D

15

i~~

~~65~~tL~Im:-l

1~~g~KC

IF

5

f'~~S-

'RI4

C25

RIB

~

~

b

C29 R22

CI7

RII cia RI2 /

lOOt<

C24{

RI5 0.01

M~G

~

.•

0.011

C28

MI

~52g

001

22K

t--~--+--__1I-1>---'

/

'--t---

.......

--J~-1----'

R~9'"

- + >----r-R21 0.01

0.01

150

0.01

22K

I

0.01

470 0 I V C30

C

19

RI3

"

C26

R

17

MEG

___

J

M~~~R

0.01

1500,

B+

0,01 1500

FACTORY

GAIN

ZERO

- - - - - - - - - - - - - - - - - -

_.1

- - - - - - - - - - - - - -

-'---------

---

7-

A

-Y-C---+--------------C-4-9-,

I

~5

UUF

R23

1500

R40

1200

VFO

OUTPUT

J5

NOTES'

I.

UNLESS OTHERWISE SPECIFIED;

ALL

RESISTORS ARE

IN

OHMS!

IO%,1/2WATT.

ALL

CAPACITORS

ARE

IN

UF

118

2.2

UF

~

o

4 5 6.3VAC

3 FILAMENT

2 I

-----,

~

I~

CR301

IN295'1

I

Y301

VI4

I R28

47

V3

TPI SOl

C45:k

12AT7

~

V2B

YFO

V6A

U'UBF~

, C46

~

5_6

UUF

CRYSTAL

L

15

CRYSTAL

,

L-._-.".t----'O..=S...,CI

LCL3A2

TOR

R(O

~2~0

laT~~~~

~~C

I ,

1/~6ftS.1

R36

ILl8

C48

C31.,kr

0.01

~

V6B

112

6EAS

R38

CATHODE

MkG

FOLLOWER

r;:-

500

r-T

:k-C-g-g------+<:.I

OHMS

l'

0.02

IpHONESl

R42

~

CR

I

CR

2

CI19

0.1

HD6225

HD6225

I

100KC=

6AU6

CRYSTAL 5 R303

R304

g~~s;~

CAW,:...':\6

lOOK

220K

I

1:¥~:g6

R301

~

004

C305 I

.~7~r;

2OK~

~3

1'u~~

tOOl

R302

~

C3.03

L 4.7K : -

1'001

MODEL~I

HA-7

-'-----

---

--

--

---------

=--=---~..j..=---~~~~~---

8+

AYC

VI3A

VI3B

1/26EAS

R47

1/26EAS

CRYSTAL

OS<-'C"""'LL::;:Ac:.T

__

O'--R_+-

___

-.

470K

CATHODE

el20

~1~"

-

R25

10K

R24

i

fRTl

lOOK

~

R F

GAIN

'I

6

47

MEG

I

t--!F'OLLOWER

R92

UH'"

C43

:~~

R35

4700

30

1!?~'~~_---~_~

__

~~7_-+~u,-,U~F

__

+-~I~-~-~~==~--~>-~9~~-:1

,kC37

r-

___

~IOMO~

___

t-

_______

~'

__

~U~~~4F~~-~~~2~~~~3~12~0~0'---4---+-_~

UUF

I..J..

'-1-'

~IJ

R29 C33

r---

05

-=

8

1'002

11

L16

'C41

R34

-.:=-

I

3 8

10K

47 0.001

aool

47K

7

:kC44

C47 R37

UUF

C39,'

LI7

TL_

0

_.

0_

'

....,.._--lTo02

1200

'---

R26

R27

270 270

'---",'""-

--'

VSB

L2S

112

6EAS

0.7

C60

S S B

CRYSTAL

M H

1'0.02

I

C34

g~~,

~i6K

R33 C38

i~

JDF C

;,

0

CI5F

CI5E

;'0402,

F

RiC

l

150

IK

2.3-14.2

N750

UUF

TRIM

MH

UUF

L-----~----~----~----~----

____

~

__________

__1

rcALl

~

C61

4.7

UUF

B+

VBA

1/26

EAS

THIRD

MIXER

5075KCIF1~r-

C66 C67

390

390

UUF

~L

UUF

T5 .

,'~

T6

2

3.3

2

r lUUFr ,

R F GAIN AvC

V

lOA

1/26BNB

DETECTOR

R62

22K

....

1::--

,k,C50

y-+---=9

t

',"___

1'0.02

iF-

R39

220K

R41

4700

C51

22

UUF

T9

OSCILLATOR

9 I

1'C125

1;~~r--16-~-'0-'

~~T'--,-~O-5~-''''~'''¥''-~-+~-.:...f8--L20

0.02

6 I

-::

I

C56~~OLLO'WER

r-+-.-_~--,2~1

;Ec---"3--r-

.....

---_~

.....

_~r--1~9'-

002

~

R45

R46

C55

--=

8

"

,*,C62

6

1"00

2

__

3 UUF

'-=--~'

r---

3~1

i

'3

:.

~

1:..:

C80

0.001

V

12B

1/26GWS

AUDIO

OUTPUT

C53

4.7

UUF

R43

47K

~7

22K

22K

22

~----~I~~~------~

LI9

UUF

RFC

C54

0.7 0.01

R44

MH

R48

220

K

330

t-----+-----------------------4-----'

IXTAL SELECTORl

R49

4700

C57

0.001

KC KC

120

RFC

L..=U,,-UF'-1~_--'

~.~

-'-- C63

'---

0.02

R51

4700

C64

0.02

R52

22K

C65

100

UUF

4 4

R53

22K

IW

R57

3300

R60

C79

270K

0002

VIOB

1/26BNS

AVC

9

R61

1500

R63

I

MEG

R73

lOOK

C86

.,k

V

II

R

72

C92

j

:C83

0001l'

6BE6

lOOK

10.

001

IR64

10

PRODUCT

5 J 9

21

220K.

UUF

DETEC

TOR

7ti

=

~~~,j=b-

V 12 A

1/26GW8

FIRST

AUDIO

AMPLIFIER

r-----------------

CI02

22

UUF

CI04

22

UUF

-------7

---------:

,---~~2

"

('.....

:..

C84

r'o:{~?

R6~r~'yl-t.;'6t"...g-6-~--<>---t-g-.6-5-2--t-:~"'~-6---'K

.------+\2F:-

R83

l~

220

100

15K

...

,t_:-------{J>

lOOK CI07 I 6

UUF

UUF

~I

1:.---+----.

+---"""'R"7"'8------'

'L25

1

047

F

CI08

CI09

CliO

,kC81 R65 R66

C89

r"

.~_;91

R75

C94

C95

R77

12K

/

~Ft

~"

12

I 2 _

SJ'

2

GI,~O

0.01

~;

I l

~~G:O

g'h:

cOlIT.

\'-3----;1

Lrg:.:~:~:·0~0~'~~~~:1'_20_~8_:2_:_3_9_0_K

...

~_~~C~a8-5~_+_,0._5_g_~_'o:I::+_:~-=0==·~_:::=';:-:!:!~:Tlr

330

0.1

~~G

([F}-(0_.00_2

.....

_0_~0_F-;'BO

L23

L24

GJ

R81

[]

~R82

rn

(j]

i-

C103

100

f-J

10

0'

CI05

100

UUF

*T~~47_00~*_T~:~

r4_70_0~*_~j-*~1--~-----'

~

UUF

S3A

FRONT

~

'

3

C106

'O

/ 0 3

~8·

/

~'

/

~r-'--

,'4

R88

IAF

GAINI

~:6K

~,j..'

IBF;j

lB.

7

S'8

JO.02

4

~L:'

4

51

--"

/ S5A ' 6

S4B

7

S48

7

S4A

'S4A

S5A

: 5

500K

FRONT I REAR I FRONT

R64

I Ra5 REAR RSS I RS7 REAR /

fRONT

FRONT / T

" , ISELECT1VIT't'1

220,

470

220

"

470,/

/

fr-4--+-~

AUXILIARY

CRYSTAL

SOr:KETS

I IFUNCTION I

~

- - - - - - -

--

- - - - - - - -

~

- - - - - - - - - - -

_L

- - - - - - - - - - - J ,

'---------------------------t---------'

B+

117

VAC

10

60

CP

S

f - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

__

J

6.3VAC

r-------~F~,

-----To

I

CC"II'3---r

0-----,

I

AMP

'tP>i8bv

S5B

SLO-BLOW

CII4

~

1~c?6VT

~

1

L,

f"'

L.C

_____

__'~

CR4

Figure

20.

Schematic

Diagram,

Moclel SX-117

Receiver.

4

<

3

V2 VI

4

VI3

4J

51

R89

33

2W

CI17A

-R90

60

...

10K

250V

-

C

1178

80

250Y

• CII7C

80

250V

R91

350

lOW

B+

B+

c~to

6~t~

3.2

OHMS

GNO

REC

STBY

SERVICE REPAIR PARTS

LIST

MODEL

SX-117

Schematic

Hallicrafters

Schematic

Hallicraiters

Schematic

Hallicrafters

Schematic

Hallicrafters

Symbol

Description

Part

Number

Symbol

Description

Part

Number

Symbols

Descripti()Jl

Part

Number

Symbols

Description

Part

Number

CAPACITORS

CAPACITORS

(CONT)

COILS

AND

TRANSFORMERS

CI

6201111

F,

5%,

300V,

Plastic

481-162621

C83 10

/ljll",

5%,

300V,

Plastic

481-132100

SWITCHES

Mica

Mica

LIA&B

Coil,

6-MC

Trap

050-000877

C2

751111

F,

5%, 300V,

Plastic

481-162750

C88

2000

J.111

F,

5%,

300V,

Plastic

481-262202

L2,7

Coil,

Shunt

(Antenna

and

051-003496

SI

Rotary,

Wafer

J

BAND

060-002523

Mica

Mica

Mixer)

SELECTOR

C3

Variable,

PRESELECTOR

048-000534

C89

1000/1/1

F,

5%,

300V,

Plastic

481-262102

L3,8

Coil,

15-Meter

Series

051-003494

S2

Rotary,

Wafer,

NL-

CAL

060-002528

C4,11

470

I1I1F, 5%,

300V,

Plastic

481-162471

Mica

(Antenna

and

MIxer)

S3

Rotary

J

Wafer

J

CRYSTAL

060-002525

Mica

C98 25

,/1

F,

25 V,

Electrolytic

045-000883

L4,9

Coil,

20-Meter

Series

051-003495

SELECTOR

C5,7,8,9,

O,OII1F,

+80%,

-20%,

500V,

047-100224

CI07

0,4711

F,

10%, 200V,

Paper

046-001302-04

(Antenna

and

Mixer)

S4

Rotary,

Wafer,

060-002511

12,13,17,

Ceramic

Disc

Tubular

L5

Coil,

Antenna

051-003498

SELECTIVITY

18,19,24,

CI08,110

4700

11ll

F,

5%,

400V,

Paper

046-001312-03

L6

Coil,

Mixer

051-003499

S5

Rotary,

Wafer,

FUNCTION

060-002510

25,26,27,

Tubular

LlOA&B

Coil,

Oscillator

(10-1

and

051-003487

(Inc,

ON/OFF)

29,30,31,

CI09,111

0,01 it

F,

5%,

400V,

Paper

046-0013Ib-03

and

80

Meters)

44,54,124

Tubular

L11A&B

Coil,

Oscillator

(10-2

and

051-003488

CRYSTALS

C6,10

1601111

F,

5%, 300Y,

Plastic

481-162161

CI12

0,005I1F,

GMV,

500V,

047-100168

and

40

Meters)

Mica

Ceramic

Disc

LI2A&B

Coil,

Oscillator

(10-3

and

051-003491

YI

10-4

Meter

Band,

36,000

MC

019-002886

CI4,37,

0,02

11

F,

+80%,

-20%,

500V,

047-100242

C113,114

0,01

)l

F,

1400V,

Ceramic

047-001309

and

15

Meters)

Y2

10-3

Meter

Band,

35,500

MC

019-002885

47,50,56,

Ceramic

Disc

Disc

LI3A&B

Coil,

Oscillator

(10-4

and

051-003490

Y3

10-2

Meter

Band,

35,000

MC

019-002884

60,63,64,

CI17A,B,

60

11

F,

250V; 2 x

80

11

F,

045-000884

and

20

Meters)

Y4

10-1

Meter

Band,

34,500

MC

019-002883

73,74,82,

&C

250V,

Electrolytic

Ll4

Coil,

Oscillator

(WWV)

051-003489

Y5

15-Meter

Band,

27,500

MC

019-002882

90,99,100,

C11B 2.2

/-L{.1

F,

10%,

Gimmick

047-200403-04

L15

Coil,

RF

Choke

(22

UH)

053-000659

Y6

20-Meter

Band,

20,500

MC

019-002881

101,106,121,125

CI19

0,111

F,

10%,

400V,

Paper

046-001329-04

Ll6

Coil,

VFO

051-003509

Y7

40-Meter

Band,

13,500

MC

019-002880

CI5

Variable,

TUNING

048-000533

Tubular

Ll7

Coil,

RF

Choke

(I MH)

053-000580

Y8

80-Meter

Band,

10.000

MC

019-002879

CI6

151111

F,

5%,

300V,

Plastic

481-132150

Ll8

Coil,

Peaking

051-003497

Y9 WWV,

16,000

MC

019-002965

RESISTORS'

Mica

LI9,25,26

Coil,

RF

Choke (0,7 MH)

05'

000530

YIO&l1

1600

KC

and

1700

KC,

019-002961

C20

561111

F,

5%, 300V,

Plastic

481-162560

RI,47

470K

ohms

451-252474

L20

Coil,

RF

Choke

(2.5 MH)

053-000335

Matched

Pair

Mica

R2,77

180

ohms

451-252181

L21

Coil,

T-NOTCH

(Bridge)

051-202270

YI2,13,

General

Coverage

Crystals

----------

C21,62,

1001111

F,

5%,

300V,

Plastic

481-162101

R3,12,22,

22K

ohms

451-252223

L22

Coil,

BFO

054-000059

14,15

(Not

Supplied)

65,87,95,

Mica

45,46,52,62

L23,24

Coil,

Warping

(Crystal

051-003500

103,105

R4,10,13,

1500

ohms

451-252152

Oscillator)

C22 681111F, 5%, 300V,

Plastic

481-162680

17,23,61

TI,2

Transformer,

Variable

IF

050-000869

Mica

R5,8,58,92

100

ohms

451-252101

(6,0

MC

to

6.5 MC)

CONNECTORS

AND

SOCKETS

C23

471111

F,

5%,

300V,

Plastic

481-152470

R6,14,24,50

lOOK

ohms

451-252104

T3',4

Transformer,

IF

(1650 KC)

050-000788

Mica

72,73,83

T5,6,7,8

Transformer,

IF

(50.75 KC)

050-200735

JI

Connector,

LF

Antenna

036-100041

C28,72,91,

0,111

F,

+80%,

-20%,

50V,

04'7-001146

R7,33

1000

ohms

451-252102

T9

Transformer,

Output

055-000449

J2

Connector,

Antenna

036-100041

115,116,

r:eramic

Disc

R9

330K

ohms

451-252334

TI0

Transformer,

Power

052-000989

J3

Connector,

lOO-KC

006-100186

120,122,123

R11 ,20 150

ohms

451-252151

Crystal,

5-pin

C32,33

471111

F,

10%, 500V,

N2200,

479-026470

RI5,85,87

470

ohms

451-252471

J4

Connector,

Crystal

036-100041

Ceramic

Tubular

R16,53 22K

ohms,

1

watt

451-352223

ELECTRON

TUBES

AND DIODE,q

Oscillator

Output

C34 1501111

F,

5%,

300V,

Plastic

481-162151

RI8

,30,38,

1

megohm

451-252105

J5

Connector,

VFO Output

036-100041

Mica

42,56,63

J6

Connector,

PHONES

036-100002

C35,36,52,

O,OOII1F, 20%, 500V,

047-100503

RI9

Variable,

2

megohms,

30%,

025-001957

SOl

Socket,

VFO

Crystal

006-100320

57,75,80,

Ceramic

Disc

1/4

watt,

Factory

Gain

VI

Electron

Tube,

type

6DC6;

090-901328

RF

Amplifier

81,86,92,

R21

Variable,

400

ohms,

2

watts,

025-002121

V2

Electron

Tube,

type

6EA8;

090-901350

96,97

Meter

Zero

Fir

st

Mixer,

Cathode

MISC E LLAl'IEOUS

C38

Variable,

Trimmer,

CAL

044-000565

R25

Variable,

10K

ohms,

20%,

025-002120

Follower

RESET

I

watt,

RF

GAIN V3

Electron

Tube,

type

12AT7;

090-900034

C39 12

1111

F,

10%, N750,

Ceramic

491-006120-95

R26,27

270

ohms

451-252271

Amateur-Band

Crystal

Bracket,

Meter

067-010598

Tubular

R28 47

ohms

451-252470

Oscillator

Clip,

Coil

Mounting

076-000986

C40

51

1111

F,

2%,

300V,

Plastic

481-151510

R29,68,ilO

10K

ohms

451-252103

V4

Electron

Tube,

type

6BA6;

090-901112

Clip,

Spring

076-100682

Mica

R31,39,48,

220K

ohms

451-252224

6-MC

to

6.5-MC

IF

Core,

Coil

(Ll9,25)

077-002158

C41,42

10001111

F,

2%,

300V,

Plastic

481-261102

64,65,74

Amplifier

Foot,

Mounting

016-201072

Mica

R32,35,37,

1200

ohms

451-252122

Front

Panel

068-001309

C43

241111

F,

2%,

300V,

Plastic

481-151240

40 V5

Electron

Tube,

type

6BE6;

090-901124

FI

Fuse,

1

Ampere,

3AG,

039-100438

Mica

R34,43

47K

ohms

451-252473

Second

Mixer

Slow-Blow

Type

r45

18 I1I1F,

2%,

300V,

Plastic

481-131180

R36,41,49,

4700

ohms

451-252472

V6

Electron

Tube,

type

6EAB;

090-901350

Fuse

Holder

006-100451

Mica

51,81,82

VFO,

Cathode

Follower

Iron

Core

(L2,5,6,7)

077-100260

C4B

5,611I1F,

2%,

300V,

Plastic

481-131056

R44,70

330

ohms

451-252331

V7

Electron

Tube,

type

6DC6;

090-901328

Knob,

PRESELECTOR

015-001752-01

Mica

R54

8200

ohms

451-252822

1650-KC

IF

Amplifier

Knob,

CAL

RESET,

OFF-

015-001758

C48 30 I1I1F, 2%,

300V,

Plastic

481-151300

R55

Variable,

5000

ohms,

20%,

025-201716

V8

Electron

Tube,

type

6EA8;

090-901350

NL-CAL,

and

BFO

Mica

1/4

watt,

NOTCH

DEPTH

Third

Mixer,

SSB-Switching

Knob, TUNING

015-001759

C49 7,5

ill1F,

2%,

300V,

Plastic

481-131075

R57

3300

ohms

451-252332

Crystal

Oscillator

Knob,

RF

GAIN,

XTAL

015-001760

Mica

R59

39K

ohms

451-252393

V9

Electron

Tube,

type

6BA6;

090-901112

SELECTOR,

BAND

C51

221111

F,

2%,

300V,

Plastic

481-151220

R60

270K

ohms

451-252274

50,

75-KC

IF

Amplifier

SELECTOR,

FUNCTION,

Mica

R66

390K

ohms

451-252394

VIO

Electron

Tube,

type

6BNB;

090-001465

AF

GAIN,

NOTCH

FREQ,

C53,61

4.7

1111

F,

5%,

300V,

Plastic

481-132047

R67,76

680K

ohms

451-252684

AM

Detector,

AVC

and

SELECTIVITY

Mica

R69

15K

ohms

451-252153

Amplifier,

AVe

Rectifier

DSI

Lamp,

Pilot

Light,

No, 47

039-100004

C55,102,

22

/lI1F,

5%,

300V,

Plastic

481-152220

R71

68K

ohms

451-252683

V11

Electron

Tube,

type

6BE6;

090-901124

Line

Cord

087-100078

104

Mica

R75 10

megohms

451-252106

Product

Detector,

BFO

Lock,

Line

Cord

076-000397

C58

201111

F,

5%,

300V,

Plastic

481-152200

R78

12K

ohms

451-252123

VI2

Electron

Tube,

type

6GW8;

090-001502

Plug,

Phono

(J~I

010-100221

Mica

R79 120

ohms,

I

watt

451-352121

First

Audio

Amplifier,

Shield,

Pilot

I,ighT

069-001758

C59 1201111

F,

5%,

300V,

Plastic

481-162121

R80

47

ohms,

1

watt

451-352470

Audio

Output

Socket,

Crystal

(YlO&l1)

006-200873

Mica

R84,86

220

ohms

451-252221

VI3

Electron

Tube,

type

6EAB;

090-901350

Socket,

Pilot

Light

086-000626

C66,67,76,

390/111

F,

5%,

300V,

Plastic

481-162391

R88

Variable,

500K

ohms,

20%,

025-002119

Auxiliary

Crystal

Oscil-

XVl,4,5,

Socket,

Tube,

7-pin

006-001048

77

Mica

1/8

watt,

AF

GAIN

lator,

Cathode

Follower

7,9,11

miniature

C68,78

3.3

!J./J.

F,

10%,

Gimmick

047-200403-05

R89 33

ohms,

2

watts

451-652330

(Not

Supplied)

XV2,3,6,8,

Socket,

Tube,

9-pin

006-000913

C69,84,85

2201111

F,

5%,

300V,

Plastic

481-162221

R91

350

ohms,

10

watts,

453-062351

VI4

Electron

Tube,

type

6AU6; ----------

10,12,13

miniature

Mica

Wire

Wound

See

Repair

Parts

List

for

Switch

Wafer,

Antenna

062-000203

C70,71 75001111

F,

5%,

500V,

Silver

470-422752

100-KC

Crystal

Calibrator

Switch

Wafer,

Mixer

062-000204

Mica

* All

RESISTORS

are

carbon

type,

1/2

watt,

10%

CRI,2

Diode,

Type

HD

6225

019-002354

Terminal

Board,

Antenna

088-002442

C79,93,94

0,002

II

F,

SOOV,

Ceramic

047-100395

unless

otherwise

st"i.ed.

CR3,4

Diode,

Rectifier,

Silicon

027-000306

(5

Connection)

Disc

Window,

Dial

022-000696

094.903123C

1168

Printed

in

U.S.A.