Hammarlund Hq-140-x Manual

TECHNICAL

DESCRIPTION

&

OPERATING

INSTRUCTIONS

Fg

a

oy

4)

ene

|

In

order

to

receive

the

full

unconditional

90-day

warranty

against

defective

material

and

workman-

|

ship

in

this

receiver,

the

warranty

card

must

be

filled

|

out

and

mailed

within

two

weeks

of

purchase.

Please

refer

to

serial

number

in

correspondence.

|

w

wa

wanLen®

ene

SPHERE

cape

THHONS

Fig.

1—The

HQ-1L40-\

Receiver.

INTRODUCTION

The

Hammarlund

HQ-140-X

is

a

modern.

general

purpose,

super-

heterodyne

communications

receiver

designed

to

maintain

high

perform-

ance

characteristics

for

many

years

without

adjustment.

The

standard

cabinet

model

has

a

self-contained

stabilized

power

supply

operating

from

a

50-60

eps,

105-125

volt

AC

source.

Frequency

coverage

is

continuously

tunable

from

540

Ke

to

31

Me

(555

to

9.7

meters)

with

adequate

selectivity

to

separate

crowded

signals.

Full

use

of

the

receiver's

high

sensitivity

is

available

for

reception

of

even

the

weakest

stations

because

of

inherently

high

signal-to-noise

ratio

and

the

superior

Hammarlund

noise

limiter.

The

special

patented

Hammarlund

crystal

filter

provides

extreme

selectivity

for

the

high

attenuation

of

closely

adjacent

interfering

signals.

Band

spread

tuning

is

available

on

the

four

higher

frequency

ranges,

with

direct

calibration

for

the

80,

40,

20,

15.

and

10

meter

amateur

bands.

Calibration

charts

for

other

ranges

may

be

easily

made

for

use

with

the

arbitrary

band-spread

logging

scale.

While

this

receiver

was

designed

primarily

for

communications

use,

good

fidelity

of

music

and

yoice

reproduction

in

both

the

standard

and

short

wave

broadcast

bands

is

provided.

Power

hum

is

negligible.

Either

headphones

or

loudspeaker

may

be

used.

Automatic

volume

control

aids

in

keeping

music

and

voice

reception

at

the

desired

level.

[2]

When

you

are

interested

in

receiving

telegraph

or

code

signals,

you

will

find

that

the

HQ-140-X

incorporates

an

unusually

stable

beat

fre-

quency

oscillator.

An

“S”

Meter

enables

you

to

obtain

accurate

reports

on

received

phone

signals

while

the

Send-Receive

switch

and

relay

connec-

tions

permit

associated

transmitter

operation

without

interference.

Large,

comfortable

and

carefully

positioned

controls

make

the

HQ-

140-X

a

truly

professional-type

receiver,

the

ideal

instrument

for

operating

in

today’s

crowded

short-wave

bands.

INSTALLATION

AND

OPERATION

o

rf)

an

o

"3

-

=)

_

S

o

<

o

=

ra)

5

=

nm

ance

do

not

place

speaker

on

top

of

receiver

cable,

The

antenna

may

then

be

connected

as

described

under

ANTENNA.

Basically,

all

that

is

necessary

to

operate

a

radio

receiver

are

the

tuning

and

volume

controls.

The

additional

knobs

and

switches

found

on

a

pro-

fessional-type

receiver

such

as

the

HQ-140-X

control

functions

which

greatly

improve

operating

performance.

The

receiver

“ON-OFF”

switch

is

on

the

AUDIO

GAIN

control.

If

you

are

unfamiliar

with

the

type

of

power

available,

check

with

the

local

power

company

before

plugging

i

in

receiver.

Turn

on

the

receiver

by

ad-

vancing

the

AUDIO

GAIN.

Check

to

see

that

the

pilot

lamps

light

and

tubes

warm

up.

6BAG

R.F.

AMPLIFIER

MIXER

While

the

tubes

are

heating,

set

the

TU!

IING

RANGE

switch

in

the

541.32

position,

MAN-AVC-BFO

on

AVC

(automatic

volume

control),

CRYSTAL

SELECTIVITY

on

OFF,

STANDBY-RECEIVE

on

RE-

CEIVE,

and

SENSITIVITY

on

“10”.

Tune

in

the

broadcast

stations

by

using

the

MAIN

TUNING

dial

and

AUDIO

GAIN

control.

wr

aA

TRT

ONIT

te

For

accurate

tuning

watch

the

“S”

meter.

Adjust

the

MAIN

I

UNIN

dial

for

maximum

meter

reading

for

the

station

to

which

you

are

listening.

The

ANTENNA

compensator

knob,

the

final

adjustment,

also

should

be

set

for

greatest

meter

deflection.

‘al

UW

‘wri

4s

When

auiumatic

volume

control

is

ig

not

desired,

the

MAN-AVC-BFO

switch

can

be

set

on

MAN

(Manual),

the

AUDIO

GAIN

control

turned

the

chassis

are

two

jacks

marked

RELAY

which

can

be

connected

to

the

send-receive

relay

of

the

transmitter

for

break-in

operation.

With

the

STANDBY-RECEIVE

switch

in

STANDBY,

the

receiver

is

silent

but

ready

for

instant

use.

The

BFO

(Beat

Frequency

Oscillator)

control

provides

a

wide

choice

of

tones

for

CW

code

operation.

Turning

the

MAN-AVC-BFO

switch

to

BFO

disconnects

the

automatic

volume

control,

and

the

SENSITIVITY

control

must

then

be

employed.

It

is

often

a

great

help

to

use

the

LIM-

ITER

in

short

wave

reception.

The

PHASING

control

normally

is

set

at

the

arrow

in

the

center

of

its

seale,

but

may

be

adjusted

to

cut

out

interference

from

stations

on

either

side

of

the

signal.

With

the

CRYSTAL

SELECTIVITY

switch

the

operator

can

choose

the

degree

of

selectivity

that

provides

the

greatest

fidelity

with

minimum

interference.

The

first

three

positions

are

for

phone

reception

and

the

fifth

and

sixth

for

single

signal

code

reception

in

ex-

tremely

crowded

bands.

Set

controls

as

follows

for

initial

operation:

Nn

for

CONTROE

PHONE

CW

or

CODE

MAN.-AVC.BFO

AVC

|

BFO

CRYSTAL

SELECTIVITY

OFF

_

OFF

CRYSTAL

PHASING

At

Arrow

At

Arrow

CW

TONE

Inoperative

|

2

STANDBY-RECEIVE

RECEIVE

LIMITER

As

required

As

required

ANTENNA

|

To

Peak

Signal

To

Peak

Signal

AUDIO

GAIN

|

Adjust

10

SENSITIVITY

|

10

Adjust

TUNING

RANGES.

Motors

Band

Frequency

Wave

Length

1

.540—1.32

Mc

555

—227

2

1.32—3.2

Me

227

—93.7

3

3.2

—5.7

Mc

93.7—52.6

4

5.7

—10

Me

52.6—30.0

5

10

—18

Mc

:

30.0—16.7

6

18

—31

Mc

16.7—9.7

TUNING

PROCEDURE

To

tune

in

a

standard

broadcast

station,

it is

merely

necessary

to

tune

the

MAIN

TUNING

dial

to

the

desired

frequency.

The

BAND

SPREAD

dial

is

inoperative

on

the

first

two

ranges,

For

reception

of

short

wave

stations

with

the

MAIN

TUNING

dial

only,

it

is

necessary

to

set

the

BAND

SPREAD

dial

to

100

in

order

to

attain

a

calibration

accuracy

of

1%

or

better.

The

BAND

SPREAD

dial

is

calibrated

directly

for

the

80,

40,

20,

15,

and

10

meter

amateur

bands.

To

make

use

of

this

feature,

set

the

MAIN

TUNING

dial

at

the

high

frequency

end

of

the

desired

amateur

band.

The

BAND

SPREAD

dial

then

may

be

tuned

over

the

range

selected.

For

a

higher

degree

of

accuracy

the

BAND

SPREAD

dial

may

be

set

to

the

exact

frequency

of

a

known

signal

and

the

MAIN

TUNING

dial

care-

fully

tuned

for

maximum

signal.

It

is

no

longer

MeCCRAEY

to

touch

the

MAIN

TUNING

dial,

and

the

BAND

SPREAD

calibration

will

hold.

A

0-100

arbitrary

logging

scale

is

also

provided

for

band-spread

tuning

of

any

desired

ranges

which

are

not

directly

calibrated.

Again

the

MAIN

TUNING

dial

is

set

at

the

hich

end

of

the

selected

rance.

Turnin

oe

the

NF

OMA

ED

DUE

Ae

CEA

Stapae

Uae

Ve

GE

OLECULUU

PELE

U.

Turning

Ciru

BAND

SPREAD

dial

from

100

to

0

tunes

the

receiver

progressively

lower

in

frequency.

The

following

table

indicates

the

approximate

frequency

range

covered

by

the

BAND

SPREAD

dial

at

various

settings

of

the

MAIN

TUNING

dial,

for

each

of

the

four

higher

frequency

bands

of

the

receiver.

Band

Low

End

Middle

High

End

3.2—5.7

Me

0.4

Me

0.7

Me

1.25

Me

5.7—

10

Me

0.2

Me

0.5

Me

0.9

Me

10—

18

Me

0.2

Mc

0.5

Me

0.9

Mc

18

—

31

Me

0.6

Me

1.2

Me

2.2

Me

[5]

DESIGN

Symbol

Type

Tube

Complement

Function

Vil

6C4

Triode

Oscillator

V2

6BA6

Remote

Cutoff

Penitode

RF

Amplifier

V3

6BE6

Pentogrid

Converter

Mixer

V4

6BA6

Remote

Cutoff

Pentode

1st

IF

Amplifier

V5

6BA6

Remote

Cutoff

Pentode

2nd

IF

Amplifier

V6

6BA6

Remote

Cutoff

Pentode

3rd

IF

Amplifier

Vi

6AL5

Twin

Diode

Detector,

AVC;

Noise

Limiter

V8

12AU7

Twin

Triode

Ist

AF

Amplifier;

BFO

v9

6V6GT/G

Beam

Power

Audio

Power

Output

v10

0C3/VR105

Voltage

Regulator

Voltage

Regulator

Vil

5U4G

Full

Wave

Rectifier

PRE-SELECTION

The

antenna

input

coupling

and

RF

amplifier

stage

provide

the

neces-

gain

for

high

performance

and

rejection

of

unde-

ealanttrrs

sary

pre-se1ecr0n

and

sired

signals.

The

high

signal

level

at

the

mixer

grid,

V3,

contributes

to

a

favorable

signal

to

noise

ratio.

of

the

RF

m2

re

Te

ae

tes

be

te

is

DOU

gria

and

piate

Circurts

ho

tek

a

tuning

coils

are

selected

for

each

band.

The

antenna

compends

ng

capacitor,

adjustable

from

the

front

panel,

ate

tam

ner

formance

with

the

permits

the

receiver

io

be

resonated

for

optimum

performa

antenna

in

use.

Pa)

Sn

Oe

phe

te

a!

FON

a

MN

TN

CONVERTER

STAGE

A

high

degree

of

oscillator

stability

is

attained

by

the

use

of

a

separate

(6BE6),

V3,

and

an

independent

oscillator

(6C4),

V1.

The

output

signal

from

RF

amplifier,

V2,

is

heterodyned

with

the

output

of

the

local

high

frequency

oscillator,

V1,

and

electronically

com-

hined

within

the

mixer

tube,

V3.

On

the

four

lower

frequency

ranges

the

BIC

WORUAEEEL

Ess

feeeAUe

Cla,

phie

Teotar

local

oscillator

is

455

Ke

above

the

signal

frequency.

On

the

two

highest

ranges

the

oscillator

is

455

Ke

below

the

signal

frequency.

band

switches,

temperature

compen-

T

Low-loss

tube

sockets

sating

capacitors,

zero

temperature

coefficient

ceramic

trimmers,

and

a

bi-metallic

compensating

plate

all

contribute

to

oscillator

stability.

Ad-

ditional

frequency

stability

is

attained

by

applying

regulated

voltage

to

the

oscillator

plate

and

by

the

rugged

construction

of

the

entire

oscillator

section

assembly.

%

a

sas

—

ag

PHASING

—

cier

SELECTIVITY

Fig.

3—Crystal

Filter

Circuit.

Fig.

4—-H.

F.

Tuning

Assembly.

The

patented

Hammarlund

455

Ke

crystal

filter

and

phasing

network

is

controlled

from

the

HQ-140-X

front

panel.

Its

six-position

SELECTIV-

{ITY

switch

includes

an

OFF

position

and

five

increasingly

selective

band-

widths.

Switch

positions

1,

2,

and

3

provide

progressively

sharper

crystal

selectivity

for

use

in

phone

reception.

Positions

4

and

5,

the

sharpest

selectivity

positions,

are

recommended

for

reliable

CW

or

code

reception.

Highest

fidelity

is

obtained

in

the

OFF

position,

when

the

crystal

filter

is

inoperative.

The

phasing

control

may

be

set

to

highly

attenuate

interfering

adjacent

signals.

With

experienced

operating

technique

the

crystal

filter

offers

:

tek:

ae

a

Satimet

ade

+

1

Ua

L

P|

.

er

covare

intonfanonns

an

3

U1LSLILLG

CE

SOU

VULY

BEALULIUCLUSIVUE

UUELUE

IF

AMPLIFIER

Nine

tuned

circuits,

in_three_stages

of

IF

amplification

(V4,

V5,

P

wes

Fr

ONE

ate

a

ee

Na

a

a:

mm.

es

pa

a

s

and

VU),

CONLTIDULE

LU

SCHSILIVILY

AU

SCITCLIVILY.

Lit

pail

per

Stage

is

purposely

low

in

order

to

maintain

stability.

Iron

core

permeability

-tuned

transformers

improve

performance

and

add

to

the

ease

of

adjustment.

° *

The

intermediate

a21@

INTOPMeaiate

i

AVC

SYSTEM

Automatic

Volume

Control

minimizes

fading

and

signal

strength

variations

by

controlling

the

gain

of

the

RF

stage

V2

and

the

IF

stages

V4

and

V5.

As

a

result,

a

comfortable

and

constant

level

of

audio

is

main-

tained.

med

pais

4th

IF

Z4

POWER

TRANSFORMER

17

3rd

IF

OIEN

me

Z3

CAPACITOR

OUTPUT

TRANSFORMER

1S

2nd

IF

X‘

TAL

FILTER

22

BFO

Z5

ist

sa

FRONT

OF

CHASSIS

Z1

Fig.

5—Top

view

showing

chassis

layout.

It

may

be

necessary

to

reduce

sensitivity

slightly

for

unusually

strong

signals.

ate

al

ne

S”

or

Tuning

Meter

is

provided

to

assist

in

tuning

and

to

give

an

indication

of

relative

signal

sir

ength.

t

n

a

opertional

to

AVC

voltage,

it

is

operative

only

when

the

MAN-AVC-

BFO

switch

is

in

the

AVC

position.

The

meter,

which

is

calibrated

to

20

db

over

S-9,

is

factory

adjusted

so

that

a

signal

input

of

approximately

50

microvolts

gives

a

reading

of

5-9,

rece

*S”

unit

indicates

a

6

db

increase,

equivalent

to

doubling

signal

strength

:

Should

meter

rc-adjustment

be

necessary:

1.

Set

front

panel

SENSITIVITY

control

to

“10”

and

CRYSTAL

ae

kee

presse

as

SELECTIVITY

to

“OFF”.

2.

With

receiver

off,

mechanically

zero

pointer

with

a

fine

screw-

driver.

iC

——

Fig.

6

—Bottom

view

showing

placement

of

parts.

3.

With

the

AVC

on

and

the

ist

IF

tube

V4

removed,

zero

pointer

with

ZERO

ADJ

potentiometer

R-19.

4.

With

AVC

on

and

V4

replaced,

adjust

meter

sensitivity

with

SENS

potentiometer

R-23.

One

section

of

the

6AL5

tube

V7

is

used

for

the

second

detector

and

t

n

t

AVC

system.

This

system

produces

a

minimum

of

dis

ey

a

eeteces

Err)

Gor

The

other

half

of

V7

operates

as

a

series,

self

adjusting

noise

limiter.

It

will

reduce

automobile

ignition

and

other

types

of

impulse

noise

to

a

minimum.

Intelligibility

is

not

affected

by

the

noise

limiter,

although

it

ganna.

cere

1

may

be

switched

off

if

desired.

BEAT

FREQUENCY

OSCILLATOR

The

Beat

Frequency

Oscillator,

which

employs

one

section

of

the

12AU7

(V8),

is

designed

to

provide

reception

of

CW

or

unmodulated

code

signals.

The

CW

TONE

control

permits

selection

of

the

desired

audio

tone.

Each

calibration

division

represents

approximately

1000

cycles.

The

BFO

is

only

operative

when

the

MAN-AVC-BFO

switch

is

in

the

BFO

position.

r4)

2

“es!

Toe

“Leiz

PHONES

R2

T.022

|

le

R47

i

ai

x09

|

leo

ou

7

ole

ae

Toee

|

+

|

aa

*

ve

cite

TI

|

a

SBAG

V3

WW

s|

V4

5

S|.

6BE6

4-H

Zé:

ebhehe—

~~

2

=

2

—

>

2fe~

PHASING

=

iad

a(e==

a,

6

=

<LI;

E==H

==

st-

Na

ae

7

=

2

50

=

G2

omtr

cia

an

3

wl

le

f

4

Ria)

RIS

renner

-J9

a

od

0221643

|

O22

“7g

*L

sw8llossieSo

§L

§

oss

oor]

“oo

|

MrT,

2

i

as|lascirse

3

mF

Sy

ese

8

Fes

vl

=

B

Tit

ENA

:

5

”

=

>

©

if

9

co

1

+2

(Oke

ne

°

Sirk

CRYSTAL

RELAY

SELECTIVITY

)

32

_———_____.-__..

BTAND/BY

2

Se

=

8

RECEIVE

Ra

RS

ee

Cat

hoes

So

—_-

2

ae

1ock

WK

2

oe

ee

Sse

ee

a

ee

a

ae.

———

—

SS

—

=

ae

S5-6R

$5-4R

————

t

R50

|

R5I

us

ee

3

ts

Jur

a

aicsw]

1k

z0W

Lio

7

Lg

ie

©

8

>

die

C)

C52A),

C528

jp

CS2C]

rs

cic

=

>

aes

pS

=

vI3e

-

geek

al}

|

+

ep

SP

efle

S5-6F

ral

eee

suaG

(RT

oF

~~

F

"

S____|cap

car

(

4

aes

oon

TOL

s

“7

CID

Me

4

<

$5

FI

R48

=

3

3,

05

-

rm

A

AS

m

+

a

GJ

PRE

5

2.

83054

ae

Pong

ee

Soe

Leute

+

*#

#5

4e¢ese8:

§

a

=<

4

fhgeg

ie

tal

gy

by

fe

gs

se3e3*

[Eph

ry

3

9

——t

o

=

NOTES.

Se

mane

“WAVE

BANCO

SWITCH

S5

SHOWN

IN

18-3

MC,

:

C57

S5-3R

3

POSITION.

WAFERS

NUMBERED

FROM

ITO

§~

NO.

1

t

——*.

:

Wy

BE

LOSEST

TO

FRONT.

eecRE

500

7

rk

XED

RESISTORS

ARE

/2

wart

UNLESS

=

OTHE!

SPECIFIEO.

LETTER

"K”

INDICATES

—e

Po

a

oS

MULTIPLICATION

37

1006,

NSV.A.C.

A

4

XEO

CAPACITORS

ARE

IN

WICROMICRO-

c

<a

FARADS(MMF)

WHEN

GIVEN

IN

WHOLE

WMBERS.

>

———

=

CAPACITORS

SHOWN

IN

DECIMAL

VALLES

ARE

WW

oO

I~

MIGROFARADS(MFD).ELECTROLYTIGS

ARE

SHOWN

zk

CIB

a

S5-3F

be]

3

WITH

PROPER

POLARITY

GONNEGTICNS.

oF

*

+

ae

Or

seul

&

3)

Fe}

Chas

——ow.

——

>

620

ese

Jcta

CIA

2B

cae

Or

f

oy

eee

7

ma

at

=

Sc.

SCHEMATIC

DIAGRA’

PF

T

)

HQ-140-x

RECEIVER

———-

Fig.

7—-Circuit

diagram.

[10]

:

(11)

Rar

PL

AUDIO

AMPLIFIE

mt

The

ey

audio

stage

is

a

resistance

coupled

voltage

amplifier

using

the

other

section

of

the

12AU7

(V8).

The

audio

output

stage,

a

6V6GT/G

beam

powee

2

amplifies

(V9)

provides

an

undistorted

output

of

at

least

2

watts.

The

output

transformer

impedance

is

6

ohms

to

match

the

voice

coil

eR,

of

the

Hammarlund

or

other

suitable

permanent

magnet

speaker.

The

phone

jack

is

connected

across

the

voice

coil

winding

and

silences

the

speaker

when

the

phone

plug

is

inserted.

POWER

SUPPLY

The

self-contained,

stablized

power

supply

is

designed

with

a

large

safety

factor

to

insure

reliable,

trouble-free

operation.

Humfree

perform-

ance

is

peed

by

a

two

section

filter.

High

voltage

is

supplied

by

the

5U4G

rectifier,

VII.

The

OC3/VR105

(V10)

furnishes

regulated

voltage

to

the

variable

frequency

Gasillavor

Vil

and

the

screen

grid

of

V2,

V3,

V4,

and

V5.

ANTENNA

The

HQ-140-X

is

designed

for

use

wiih

either

a

single

wire

or

balanced

type

of

antenna.

A

good

match

to

most

antenna

systems

will

be

obtained

because

of

the

receiver's

input

impedance,

nominally

400

ohms,

and

its

high

sensitivity.

Warthwa

tmih

7,

For

general

coverage

an

indoor

wire

of

20

to

50

feet

will

give

surpris-

ingly

good

fecep

Hon.

A

long

single

wire

outdoor

antenna

such

as

shown

in

Figure

8

will

generally

give

entirely

satisfactory

per

rformance.

This

wire

may

be

50

to

75

feet

long.

For

best

reception

the

antenna

should

be

isolated

as

much

as

possible

neten

ye

nhianta

from

neighboring

ODjECcis.

ee

2

,

FT

OVERALL

Lao

orga

eee

c

aa

\

:

————

ee

S

Fig.

8—Antenna

suggestions.

(A)

Single

Wire.

(B)

300

ohm

folded

di-pole.

[12]

Optimum

performance

on

a

particular

amateur

band

or

other

narrow

tuning

ranve

will

he

obtained

by

using

a

half-wave

di-pole

or

folded

di-

re

See

is

BREET

Wa

Y

pole

fed

with

300

ohm

or

Saitable

lead-in

as

shown

in

Figure

8B.

The

length

of

the

required

di-pole

may

be

calculated

by

the

following

formula:

468

Length

(feet)

=———__—

A

good

grouna,

a

aid

in

reception.

RE-ALIGNMENT

PROCEDURE

A,

Equipment

necessary

1.

Cathode-ray

oscilloscope

(externally

synchronized

by

the

signal

g

generator.

)

2.

Frequency

Modulated

(swept)

signal

generator

(fairly

constant

output.)

The

intermediate-frequency

transformers

are

iron-core

per-

meability-tuned,

and

resonated

with

fixed

silver-mica

pear

é

A

high

degree

o:

of

stability

results,

which

should

make

I

IF

re-align-

ment

unnecessary

for

a

long

time.

Re-alignment

should

not

be

attempted

without

suitable

equipment.

HQ-140-X

_-REAR

OF

CHASSIS

CO)DODD

OOD

DD

ANT.

ww

Ww ww ws

|

|-—-TEST

FREQUENCIES

FOR

1

'

RFR

OSC.

ALIGNMENT

'

!

fel./

ell

o/.

~|

°

||]

a

o>

es

7)

a

e

2

ar

.

Loy

at

Bae

fk

pe

to

:

Vv

Ve

cs) re)

:

ge

=

Q

zs

Q

xs

Vv

Y

=

y

8

o28

eo

2

28s

onn

:

sts

eane

$2393]

i

toro.

4

H

‘

'

t

tot

t

t '

6

e

¢C

:

OSC.

TN

NT

Nae

'

‘

ey

war)

’

Ne

a7

Ne

v

'v

V'

132.54

1

$7

3

TO

re

brance{

10

TO

3.2

1.32

1

0

18:0

10.0

$7

‘y

s 5

‘

3

2

+

8

ee

a

ok

ee

Fig.

9—Left:

Diagram

for

tuning

IF

Amplifier,

be

vermin

RF

Stage

and

H.

F.

Oscillator.

Fig.

10—Selectivity

Curves.

191

[49]

The

IF

transformers

must

be

tuned

for

symmetry

and

proper

all

for

”

amplitude

on

the

coincidence

of

the

visible

curves

oscilloscope.

This

requires

a

stage-by-stage

alignment,

starting

with

the

last

IF

transformer

(Z4)

and

continuing

back

through

the

first

IF

transformer

(Z1).

ns1ro

as

WE.

This

is

the

procedure:

(1)

Set

receiver

as

follows:

MAIN

TUNING

DIAL........

54

Me

Bandswitch

(TUNING

RANGE).

.54—1.32

Me

STANDBY-RECEIVE.........

RECEIVE

LIMITER................-5.-.

OFF

MAN-AVC-BFO...............

MAN

CRYSTAL

SELECTIVITY.....

OFF

(2)

With

the

generator

set

at

455

Ke

‘apply

signa

to

the

grid

(pin

No.

1)

of

the

3rd

IF

tube

(V6).

Adjust

the

two

in-

ductors

of

Z4

alternately

to

obtain

maximum

amplitude,

symmetry,

and

pattern

coincidence

on

the

oscilloscope.

(3)

Apply

the

signal

input

lead

to

the

grid

(pin

No.

1

)

of

the

2nd

IF

tube

(V5).

Turn

the

two

adjustment

screws

of

Z3

to

obtain

a

symmetrical,

comneadin

curve

with

as

much

amplitude

as

possible

without

distur.

pattern.

(4)

Switch

the

signal

input

lead

to

the

grid

(pin

No.

1)

of

the

Ist

IF

tube

(V4),

and

adjust

the

piate

inductor

(T2)

of

the

crystal

filter

(Z2)

for

maximum

amplitude

at

center

of

curve.

(5)

Apply

the

signal

input

to

the

grid

(pin

No.

7)

of

the

6BE6

mixer

tube

(V3).

Adiust

screws

of

[st

IF

trans-

0.

4s)

3

ust

Sscre

nerd

transformer

(Z1)

as

in

(3).

This

should

result

in

a

tall

.

selectivity

curve

with

a

slightly

flattened

peak.

(6)

Turn

CRYSTAL

SELECTIVITY

switch

to

position

No

1,

set

CRYSTAL

PHASING

pointer

on

arrow,

and

aa

just

the

grid

inductor

(L2)

of

the

crystal

filter

(22)

for

maximum

amplitude

and

symmetry.

Adjust

signal

input

or

receiver

SENSITIVITY

‘control

as

required

to

prevent

overloading.

(7)

Switch

to

CRYSTAL

SELECTIVITY

position

No

2,

and

if

necessary,

move

PHASING

CONTROL

slightly

from

arrow

to

obtain

identical

images.

Adiust

signal

generator

frequency

to

obtain

coincidence

Jay

Cages

eRe

ink

of

the

images.

“Tf

complete

coincidence

i

is

not

obtained.

alternately

make

slight

adjustments

of

the

PHASING

[i4]

images

coincide.

After

these

last

steps

have

determined

the

exact

fre-

:

uency

of

the

Quartz

crystal,

the

frequency

setting

of

the

signal

generator

should

be

left

undisturbed.

(8)

Repeat

carefully

the

complete

IF

alignment

procedure

(steps

1

through

7)

for

the

crystal

frequency.

C.

RF

Amplifier

The

RF

and

oscillator

stages

have

been

carefully

aligned

against

standard

crystals

at

the

factory

and

are

designed

to

hold

their

adjustments

over

a

long

period

of

time.

Re-alignment

should

not

be

at

ttempted

unies

is

necessary.

As

shown

on

the

chart,

con

irol

ihe

Ul

.

Fy

Os

“ill

calibration.

s

ti

fe]

=

oO

so

=

ia

fe)

>

°

=]

Led

3°

:

ne

=

i}

mn

-

E

fe]

7

6

oo

mn

The

middle

row

of

adjustments

control

RF

alignment

and

the

rear

adjustments

are

for

anienna

alignment.

Here

is

the

procedure:

1.

Set

controls

as

follows:

Receiver

STANDBY-RECEIVE.........

RECEIVE

MAN-AVC-BFO...............

MAN

CRYSTAL

SELECTIVITY.....

OFF

BAND

SPREAD......

100

Bandswitch

(TUNING

RANGE).

.54—1,32

Me

MAIN

TUNING..............

.60

Me

Signal

Generator

Frequency

526.

(iscecctnyeen

ene

ies

.60

Mc

Modulation....................

Off

Each

band

is

adjusted

for

maximum

response

by

changing

the

inductance

at

the

low-frequency

end

and

the

capacitance

at

the

high-frequency

end.

These

adjustments

mutually

affect

each

other.

If

much

change

is

made

at

one

end

of

the

band,

the

other

end

of

the

band

must

a

re

ye

Fesad

usted:

aie

procedure

is

nad

+)

oe

e

5

mile

i

TUNING

dial

back

and

forth

while

adjusting

the

trimmer

capa-

citor,

in

order

to

avoid

a

false

setting.

i

With

signal

generator

connected

to

the

receiver

ANTENNA

termin

ale

and

antnut

meter

connected

to

the

SPRAKER

ter-

PVESLALLICUDG

ana

MRA

aeavc

tun

WVEEEAUUEUU

FW

AY

WR

BARRA

aaa

adjust

L17

until

maximum

deflection

is

obtained

on

the

meter.

3.

Change

signal

generator

frequency

to

1.25

Mc

as

shown

in

Figure

9.

Set

MAIN

TUNING

dial

on

1.25

Me

to

correspond.

Adjust

trimmer

capacitor

C73

to

tune

in

signal,

and

C69

for

maximum

response.

4.

Set

signal

generator

to

1.4

Mc,

change

io

ihe

1.32—3.2

Me

Band,

and

set

MAIN

TUNING

dial

on

1.4

Me.

Adjust

L18

until

signal

appears

and

LL12

and

L6

for

maximum

response.

2

Change

signal

generator

to

3

Mc,

and

set

MAIN

TUNING

ial

t

to

23

Meta

correspond

Adinst

C64

to

tune

in

sional

and

C58

3

aval

uy

Spy.

“ata

Apts

be

maximum

response.

In

like

manner

this

procedure

is

followed

for

each

band

and

should

be

repeated

until

calibration

and

tracking

are

as

desired.

MAINTENANCE

The

HQ-140-X

is

designed

to

give

years

of

trouble-free

service

with-

out

need

for

repairs.

Tube

failure

is

ibe

most

common

source

of

tr

ouble.

The

second

most

common

cause

of

difficulty

is

component

failure

among

small

resistors

and

fixed

capacitors.

The

following

chart,

Figure

ii,

gives

voltages

between

tube

socket

terminals

and

chassis.

Below

each

voltage,

in

parenthesis,

is

shown

the

meter

scale

required

for

checking

with

a

soln

having

a

sensitivity

~f

TNAN

~L.

oe

alt

Ae

O81

Lyvy

CUOOIS

per

VUIU

UL

may

be

disregarded.

With

the

aid

of

the

chart

and

the

schematic

diagram,

defective

com-

ponents

can

usually

be

located.

The

parts

list

in

the

back

of

this

manua

}

gives

values

and

Hammarlund

part

numbers.

Standard

items

may

be

purchased

locally.

Non-standard

components

are

availabie

on

order

from

ihe

faciory.

A

delicate

communications

receiver

should

be

entrusted

only

to

a

qualified

technician.

Should

difficulty

be

experienced,

please

write

the

company

for

advice

or

to

arrange

for

factory

service.

ae

|

AT

MAX.,

|

NO

SIGNAL

|

POSITION

Limiter-oif

Man.

Position

Receive

Position

|

avo

|

BFO

|

Ist

2nd

3rd

|

Det.

|

Ree

|

Ist

|

RF

|

Mixer

;}

OSC

IF IF

IF

AVC

|

Out-

|

Recti-

Audio

BFO

|

6BA6

|

6BEG

|

6C4

|

AMP

|

AMP

|

AMP

|

Limiter

put

_

2

fier

_

E

ocs/

ovis

|

gv

bee

{|

l

i

|

bBAG

|

OBA BBA

|

DALO

|

6V6GT|

5U4G

|

VRi05

|

iZAU7

{|

12A07

|

Tie

|

a.

1

|

ao

|

—0.2

Point.

75

to

ground.

....

|

2s

|

(300)

|...

|

12)

|

210

|

(300)

|

(300)

2

|

14

|

3.5

|

1.5

|

2.3

|

-0.4|

298

to

ground.....

Lent

(3)

|

(6)

(8) (3)

|

12)

a

(300)

ae

8

6.2

|

6.2

|

6.2

|

6.2

|

6.2

|

6.2

|

6.2

|

256

108

|

2.3

to

ground.....

Ac

A.C.

AC

AC.

|

AC.

AC

A.C.

|

(800)

(3)

“as

4

273

280

6.2

to

ground.....

Dic

|

aoe

|

.e.

|

(00)

|

AC. AC,

sepia

5

200

205

92

208

2

|

192

Point

|

106

6.2

to

ground...

(300)

|

(00)

|

(300)

|

00)

|

(300)

|

(300)

|

a

273,

|

(300)

|

A.C.

fen

ac

sso

Ol

eed

ad

ion

ao

4

44

ie

|

ao.

Ld

4

to

ground.

....

(300)

|

(300)

|

(300)

|

(300)

ae

AC.

(300)

7

3.5

|

3.1

|

23

|

-02/

6.2

106

Lia

to

ground...

..

(6)

vay

|

(6) (6)

(3)

|

(12)

AC.

| |

(300)

Lame

(60);

8

-|

14

|

298

to

ground.....

|

(60)

|

(300)

|

PARTS

LIST

HQ-140-X

ScHEMATIC

|

HAMMARLUND

DESIGNATION

DESCRIPTION

Parr

No.

CAPAC

CITORS

Cl,

A-F

Maino

Tuning,

variable..........

(Pari

of

20840-G1)

C2,

A-}

|

Band

Spread,

variable..........

arte

of

20840-G1)

C3,

4,5

Ceramic

disc,

022u0f

W.V.D.C...

mies

cis

923034.24

C6

Silver

mica,

50

ut

500

W.V.D.C..

00.00.00

cee

ec

eee

23071-5

C7,

8,

9

Ceramic

disc,

.022

pf

W.V.D.C.............

eee

23034-24

C10

Silver

mica,

240

pyf

500

W.V.D.C.

(Part

of

Zl,

i‘

F.

transformer

assembly

*26121)..|

23071-56

cil

Silver

mica,

260

pyf

500

W.V.D.C.

|

(Part

of

Z1,

L.F.

transformer

ameeeably’

genase

23003-112

C12,

13,

14,

15

Ceramic

dise,

"022

uf

W.V.D.C..

pe!

23034-24

C16

Silver

mica,

220

uu

500

W.V.D.C.

(Part

of

Z2,

Crystal

Filter

Assembly

*26125)......

23071-55

C17,

18

Silver

mica,

100

puf

500

W.V.D.C.

(Part

of

22,

Crystal

|

Filter

Assembly

#26125)......|

23003-94

Cig

Cry

Stal

phasmg

variable,

|

is

Part

of

Z2,

Crystal

Filter

Assembly

#26125)......

11776-G1

C20

Silver

mica,

270

uuf

500

W.V.D.C.

(Part

of

Z2,

Crystal

Filter

Assembly

¥26125)......

23003-104

C2)

Silver

mica,

100

wuf

500

W.V.D.C..

0...

ee

eee

(Part

of

Z2,

Crystal

a

rane

#20125)......

23003

-94

C22,

23,

24

Ceramic

dise,

.022

uf

W.V.D.C.....0020.0000..0.0000-

23034-24

C25

Ceramic,

NPO

15

wuf

500

fa

ry.

1

Ot

Gere

sear

ee

eer

eerie

23023-107

CK

C26

|

Silver

mica,

240

-puf

500

W.V.D.C.

|

(Part

of

Z3,

I.F.

transformer

assembly

*26123).....

|

23071-56

[17]

PARTS

LIST

HQ-140-X—Cont.

2

i

ScHEMATIC

DESIGNATION

C27

C€28,29,30,3

1,

32

C33,

34

Ruy

OS

C35,

36,

37

C38

C39

Man

C40

C41

C42

DESCRIPTION

CAPACITORS—Continued

Silver

mica,

260

pyf

500

W.V.D.C..

(Part

of

Z3,

I.F.

transformer

ania

*

26123)....

Ceramic

disc,

.022

puf

W.V.D.C

Silver

mica,

95

pyf

500

W.V.D.C.

(Part

of

ZA,

Final

LF.

iad

assembly

#26112)

Mica,

100

aut

500

W.V.D

Paper

tubular,

.

Paper

tubular,

O01

Ceramic

disc,

.022

Silver

mica,

5

put

5

Silver

mica

ea

t

mica,

(Part

of

Z5,

B

B.F.O.

variable,

(Part

of

Z5,

B

Silver

mica,

220

|

(Pari

of

Z5,

-

Paper

tabular

<0

.

Ceramic

dise,

Ri)

Mica,

300

ual

5

Electroly

tie,

10

Paper

tubular,

.05

i

60

Mica,

620°

aut

500

W.V

(Pari

of

R.P.

Unit

Assembly

iy

Ceramic,

NPO

8

yuf

500

W.

(Part

of

H.F.

Oscillator

Unit

aay

*

26143)....

Electrolytic,

10-500V,

20-450V,

20-450V.............

Ceramic

disc,

.022

uf.

Wo

airacas

te

adatnd.

actcieast

sari

wea

Reaiantite

Wie

Mica,

620

puf,

500

W.V.D.C..

eee

Antenna

Compensator,

variable

(Part

t

of

Main

Tuning

Unit

I

#

20840-

Gl)

Mica,

5100

uf

500

W.V.D.C.

...

0...

eee

Trimmer,

mica

3-35

wuf....

6...

ee

an

Trimmer,

mica

1.5-9

wyf.....

0.006

ce

eee

Trimmer,

mica

3-35

ppt...

6.6.6

eee

Trimmer,

mica

1.5-9

wpf....

2

eee

Trimmer,

mica

3-35

WU

sos

andie,

dong

ce

eitheck

aint

Avangeag

dd

Lae

A)

eh

ae

ins

Rio

°

aE

S85

Trimmer,

ceramic

NPO

1.5-7

wuf..

oo...

eee

Trimmer,

ceramic

NPO

3-12

wyf...........0000

0000.

|

Trimmer,

mica

1.5-9

wyf...

0...

ee

Silver

mica

673

ywuf

500

W.V.D.C..

00.0.0.

c

eee

Silver

mica

300

wyuf

500

W.V.D.C.............6.000.

Ceramic

disc.,

.022

W.V.D.C.......0...0..0.0..00-5.

|

Mica,

1500

pyuf

500

W.V.D.C................0..0005.

|

RAtn,

1900

..,.f

500

WYDnO

IWEING,

LUVU

(ar

FU

We

Vea

he

se

ee

eee

eh

ee

Fuse,

2

ampere

type

3AG...........

peered

ease

ae

|

Phone

jacks.

j

6526-655

yaa

ee

es

Shy

ee

Relay:

jack

0i..o205

«or

eteisisters

redid

ak

RE

eet

Antenna

terminal

strip

MEN

Caeh

i

ania

tee

Obit

eten

A

een

Obey

abe

tnueat

wpa

Speaker

terminal

strip..............

0.0...

cece

aes

:

COILS

|

R.F,

choke

(CH-X).

0.0

Crystal

Filter

grid

coil,

|

(Part

of

Z2,

Crystal

"Filter

Assembly

*26125-G1)...

Filter

choke

ait

acseaNaract

OE

cache

tale

3e

ae

fettolat

g

tie

Mlenrtada

tone

de

tnnehe

Antenna

Coil

Assembly

1.32—3.2

me

range..........

Antenna

Coil

3.2—5.7

me

range.

..........

00000

eens

|

Antenna

Coil

5.7—10

me

range

faRTOnRa

SOM

aU

MOC

PaMee.

2

eee

ee

es

|

HAMMARLUND

Part

No.

99ND

119

eadJUUOFLIG

23034-24

23071-62

23001-48

239

12-2

23912-23

92Nn94

9A

euvu

tat

23002-1

23071

-56

23023-22

CH

15504-61

23034-24

eoues=-

23059

-2

16089-1

23004-2

|

23003-105

23034-24

23015-20

23015-40

aou

sd

15928-7

31068-G1

26111-1

26051-G1

orner

mam

26051-G2

6013

6016

SCHEMATIC

;

JLAMMARLUND

DESIGNATION

|

DES

CRIETIOS

Parr

No.

COILS—Continued

L9

Antenna

Coil

10—18

me

range.....................

6019

L10

Antenna

Coil

18—31

me

range...

.

2.22.00

22022-

2...

|

6022

Lil

R.F.

Coil

Assembly

.54—1.33

me

range..............

|

26047-G2

L12

R.F.

Coil

Assembly

1.32—3.2

me

range..............

26047-G1

Li3

K.F.

Coil

Assembly

3.2—5.7

me

range...............

|

26047-G6

L14

R.F.

Coil

Assembly

5.7—10

me

range...............

|

26047-G5

hs

RUF:

Coil

Assembly

10—18

mc

range

ed

|

26047-G4

L16

R.F.

Coil

Assembly

18—31

me

range................

|

26047-G3

L17

H.F.

Ose.

Coil

Assembly

.54—1.32

me

range.........,

26030-G2

Li8

H.F.

Osc. Coil

Assembly

1.32—3.2

me

range.........

26030-G1

L19

H.F.

Ose.

Coil

Assembly

3.2—5.7

mc

range..........

26030-G6

L20

H.F.

Use. Coil

Assembly

5.7—10

me

ves

deanodten

pat

cans

26030-G5

L21

H.F.

Ose.

Coil

Assembly

10—18

me

range.

26030-G4

122

HE,

Ose.

Coil

Assembly

18—31

me

Yange...........

26030-G3

M1

Carrier

Level

(“S”)

meter..........................1

26149-G1

PLI,

2

Pilot

Lamp

No.

47,

6.3

V.,

.15

amp................0.

16004-1

RESISTORS

RI

22

Olamis:

9.

W

sc

tic

ot

cede

shj

el

ois

eae

ow

nan

ek

Ss

Bh

19309-9

R2

47,000

Ohms,

14

W...

eee

ees

19309-89

R3

2,200

Ohms,

16

Wa...

cee

19309-57

R4

100,000

Ohms,

14

W....

6...

19309-97

R5

10,000

Ohms,

1

W...

1...

cece

eee

19309-73

ite)

106,000

Obms,

19

W....

0.

cnn

19309

-97

R7

150

Ohms,

14

Wo...

eee

ees

19309-259

Ra,

9

2,200

Ohms,

14

We.

..

ccc

eee

19309-57

R10

10,000

Ohms,

14

Wu...

0.

cece

eee

19309-73

Ril

200

Ohms,

2

Woosh

aete

debit

hs

Be

Lee

Geratena

et

leet

oid,

se

19309-57

R12

2,200

Ohms,

14

W.

(Part

of

Z2,

Crystal

Filter

Assembly

#26125)......

19309-57

Ri3

2,200

Ohms,

14

W.....

cece

e

ee

eee

|

19309-57

R14

300

Ohms,

16

W..

1...

ccc

cee

eee

ee

ee!

19309-202

R15

51:

Ohims,

16,

Wes

go

secate

cet

teen

ean

bis

awed

dws

19309-193

R16

22

Ohms,

Le

Wooo

teint

amoral

setae

28

Sande

tee

Beate

19309-9

R17

470,000

Ohms,

14

W...

06...

eee

een

'

19309-113

R18

10,000

Ohms,

14

W.......

eee

ees

19309-73

R19

Potentiometer,

3

300

Ohms............2....00

000

cae

15368-1

R20

270

Ohms,

14

Wo...

cee

cece

eeeen

19309-262

R21,

22

2,200

Ohms,

K

Wesessdicealat

(ate

deaotichiy

Bek

doen

scbanms

ed

Cease!

19309-57

R23

Potentiometer,

1500

Ohms...........0..............)

15368-2

R24

2,200

Ohms,

44

Wz...

ccc

cece

ence

ees

19309-57

R25

33,000

Ohms,

1

W...

2...

eee

19310-293

R26

47,000

Ohms,

14

W.

(Part

of

ZA,

L

F.

.

Transformer

Assembly

*26113).....

19309-89

R27

2,200

Obs,

14

Wo...

cc

cece

eee

neene

19309-57

R28

240

Obs,

14

Wa...

ccc

eet

eee

es

19309-201

R29

47,000

Ohms,

We

Wick

on

shes

Shue

tg

hap

aeetuns

aeatee

19309.89

R30,

31

270,000

Ohms,

14

W...

1.0...

s

cece

cee

ee

cece

cee

eee,

19309-107

R32

1

Meg

Obmss:\6.

Wet

coe

cas

Ga

hit

ena

bhenLe

ead

19309-121

R33

2.2

Meg

Ohms,

14

W...

1...

ec

cece

eens

19309-129

R34

820,

006

Ohimss:16

We

session

atelier

onan

caceaes

19309-119

R35

186,000

Olams,

49

We...

ccc

cece

eens

19309-103

R36

Potentiometer

;

250,

000

Obms

(switch

attached).......

6095

R37

1,000

Obms,

14

W..

ee

Bits

Garg

direc

Ath

Hen

ebiuc

doe

po

atnkieeise

tins

eee

a

tees

EGE.

2

19309-4149

R38

62,000

Ohms,

1

W.....

000.

cece

ee

cee

eee

cee,

19310-231

R39

Potentiometer,

10,000

Ohms......

0.0...

cece

cee

eee

15367-1

R40

240

Obs,

16

Woo.

oc

eee

ne

oes

ee

eee

atl

base

eas

19309-201

R41

33,000

Ohms,

14

W.

(Part

of

75,

B.F.O.

Assembly

*26107)............

19309

-85

[19]

EEE

ScHEMATIC

DESIGNATION

|

wae

Beer

ere

yy

a

ob

Ss

RUE

a

wa

~_

‘*

Om

my!

4

gry

Unis,

ay’

(Part

of

B.F.O.

Bracket

Assembly

#26029-G2).....|

220,

000

Ohms,

14

Wo...

0

cece

cc

ccc

cet

e

nena

eees

360

Oba

LOW

ed

see

eked

et

eG

ea

27

Ohms,

|

up

paid

dela

lenstee

Wnt

er

tik

a

eeded

‘eoualen

sua

de.ra

"Sheds

eta

cuetahe

|

_f

D

-

a

™\P

art

of

RLF.

Unit

Assem

10

Ohms,

4%

W.

(Part

of

H.F.

Osc.

Assembly

¥26143).............

4,000

Ohms,

5

W...

0.0...

cee

ce

eee

eens

1,000

Obims,

20

W..

1...

cee

eee

ee

23200

Ohms,

14

W

(Part

of

H.F.

Ose.

Assembly

#26143).............

SWITCHES

,

po

ae al

aneser

Crystal

Selectivity

MAN-AVC-BFO.

...

2.0...

cece

eee

eens

Dar

be

Pea

2d

nie

dese

es

gies

tee

aig

cea

eS

ee

eta

ER

Standby-Receive.......

0.0...

cece

eects

H.F.

Ose.

pine

s

dnive

ey

ot

Geib

Dine

beeen

tengia

on

hea

are

1a

9

as

0

Sone

4

o

(3

Pen

Detector

grid

tap.

.....

00.

eee

cee

eens

DD

aleen

mn.

plate

gh

WOE

a

OSE

a

sa

WE

Ra

oa

Nora

aba

AE

poe

seen

we

fe

esas

deep

va

cen

fe

SE

FAB

grid:

cia

secede

aa

tad

od

ping

edges

le

hh

Lease

es

Antenna

ne

eee)

edie

ce

oe

Rigs

Sha

rept

kn

Sea

a

ae

ea

Power........

(Part

of

R36,

Potentiometer

6095)

Me

t

TRANSFORMERS

AND

IMPEDANCE

ASSEMBLIES

At

Mh

a

wae

Te.

M8

Fn

ee

Audio

Vutput

A

ransfor

BELUR

sw

eee

mee

ee

Power

Transformer..........0..0000

ccc

cee

ee

nee

eee

Grystal,.455

Ke@vicy

cig

i

ots

BE

ee

Hee

a

Ist

ILF.

Assembly,

includes

C10, Cll,

and

Tl.........

Crystal

F

Filter

ssembly

|

(2nd_

I.E

I.

F.

),

includes

C16,

Cia

CON

pean

Walia

C18,

WULF,

Us,

Usls

Like

R12,

T2,

and

Yl.

3rd

I.F.

Assembly,

includes

C26,

C27,

and

T3........

Final

T.F.

Assem

iy,

includes

C33,

C34,

R26,

and

T4..

B.F.O.

Assembly

includes

C42,

C43,

C44,

L3,

and

R41.

HAMMARLUND

Part

No.

19310-81

19309-63

19310-89

19309-105

19310-211

19380-47

19435-19

19309-57

26155-1

26107-G1

Printed

in

U.S.

A.

1-55

Hammarlund HQ-140-X Manual

Popular Receiver manuals by other brands