Hallicrafters HT-40 MK1, HT-40K MK1 Operating And Service Instructions

allicraliers

OPERATING

AND

MODEL

SERVICE

COMMUNICATIONS

INSTRUCTIONS

TRANSMITTER

HT

-40

MARK

I

"The Hallicrafter's Company warrants each new radio product manufactured by it to be and agrees to remedy any change

for

any part

free.

from defective material and workmanship such defect or to furnish a new part in ex-

of

any unit of its manufacture which under

normal instaliation, use and service discloses such defect, provided the unit

is

delivered by the owner to our authorized radio dealer, wholesaler, from whom purchased, examination, with

all

days from the date

or,

authorized service center, intact,

transportation charges prepaid within ninety

of

sale to original purchaser and provided that

for

such examination discloses in our ;udgment that it is thus defective. This warranty does not extend

have been sub;ected

to

our own, improper installation,

to

any

of

our radio products which

misuse, neglect, accident, incorrect wiring not

or

to use in violation

of

instructions

furnished by us, nor extended to units which have been repaired

altered outside

where the serial number thereof

nor

to accessories used therewith not

Any

part

be remedied

of

our factory or authorized service center, nor to cases

of

a unit approved

or exchanged

liaS

been removed, defaced or changed,

of

our own manufacture.

for

remedy

or

by

the authorized radio dealer

exchange hereunder will

or

whole-

saler without charge to the owner.

This warranty and no representative or person other liability in connection with the sale

is in lieu

of

all other warranties expressed or implied

is

authorized to assume

of

our radio products:'

for

us any

or

092-01266~

1-1.

HT-40K transmitter l on The only r air" nated or source

1-2.

structed ca problem c parts. control cir were

INTRODUCTION.

The

MK1

ated)

and

the

80,

operation

antenna, a crystal

microphone

.

T.V.I.

The

to

use

television

has

ircuit

design

Adequate

specifically

Hallicrafte

kit

is a four-tube,

capable

CW

(continuous

40,

20,

equirements

are a 50-ohm

and a 117-volt,

SUPPRESSION.

transmitter

suppress

interference

been

given

and

in

filtering

cui

ts

and

AC

selected

r s

Model

of

AM

15,

10,

for

or

has

been

spurious

full

the

selection

has

power

to

Figure

GENERAL

HT-40

self-contained

(amplitude

wave)

immediate

external

consideration

avoid

transmission

and 6 meter

to

75-ohm

VFO, a key

60-CPS,

designed

radiations

(T.V.I.).

been lines.

The

and provided

Components

undesired

1.

View

SECTION

MK1

or

modu-

bands.

"on-the-

termi-

AC

power

and

con

that

may

T.V.1.

in

the

layout

of

for

re-

of

Transmitter.

I

DESCRIPTION

sonances

cillation.

Another

is

employed

final

amplifier.

network

suppression nected of

all

ohms

tory,

-

vanced ference. which

itse

maximum

mitter, the

antenna

which

to a coaxial connector antenna to

75

The

has

engineering

There are,

cannot

lf.

Therefore,

a low

transmitter output

feed

and

arranged

important

in

the

The

has

capabi

systems

ohms.

transmitter,

every

T.

be

prevented

V.1.

-pass

line.

advantage

free

to

prevent

T.V.1.

output

excellent

lit

to

however,

it

coup

tuned

filter

output circuit

y.

The

having

as rec

minimize

within

is

recommended

operation

be

connector and

proofing

ling circuit

inherent

pi

network

and

permits

an

impedance

eived

of Halli

television

some

types

the

of

installed

parasitic os-

feature

to

the

is a pi

harm

onic

is

con-

the

use

of

from

the fac

crafters

transmitter

your

the

ad-

inter-

of

T.

V.l.

that,

for

trans-

between

coaxia

50

-

l

TECHNICAL

SPECIFICATIONS

TYPES

FREQUENCY FREQUENCy POWER

AUDIO DISTORTION • HUM AND NOISE OUTPUT • • • • • • • • • • • • • • 40 DB TUBES POWER OUTPUT

POWER

OF

EMISSION

AM

• •

••

••••

cw

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

SELECTION COVERAGE • • • • • •

INPUT

AM

••••

CW

••••

INPUT

•••••••••••

SOURCE • • • • •

COUPLING • •

CONSUMPTION • • • • • • •

•.•.••••••

••••••••

•

••••••••••••••••

•••

Amplitude

.

•••••

• • •

Continuous

• • •

Crystal

• 80, 40, 20, 15, 10,

•

••

75

watts

75

watts

0.004 V

••

8%

•

•• .•

at

•

Four, 105-125 Pi

network

175

watts

modulation

wave

controlled

peak

maximum

minimum

75%

modulation

or

more

plus

two

volts,

or

and 6 meter

power

at

input

below

silicon

60 CPS,

external

to

microphone

maximum

rectifiers

AC

VFO

bands

jack

output

RF

OUTPUT IMPEDANCE

CW

KEYING.

MICROPHONE

DIMENSIONS • • • • • • NET

WEIGHT • • • • • • • • • . • . • • • • • • . . • 17

SHIPPING

Band

80 40 7

20 14 15

• • • • • • • • • • • • . • • • • • • • •

INPUT.

WEIGHT • • • • • • • •

Transmitter

••••••••.•••••

• •

••

3.5

MC

21 MC

•••••••••••

FREQUENCY COVERAGE

Frequency

to 4 MC

to

7.3

to

14.35

to

21.45 MC 7000 KC

Range

MC

•••

50

to

75

ohm

phenol

Panel

connector

Rear

Amphenol

7-3/16"

19

83-1SP

mounted

chassis

pounds pounds

coaxial

1/4"

mounted

75-MC1F

high,

13-3/8"

Crystal

connector

key

jack

accepts

plug

microphone

connector

wide,

or

VFO 3500 KC 7000 KC to 7300

7000 KC

to

to to

accepts

standard

receptacle

8-1/4"

Frequency

4000 KC

KC

7175 KC 7150 KC

Am-

2-

deep

Range

10

6 50

Note:

1000 KC = 1 MC

2

28 MC

MC

to

29.7 MC 7000 KC

to

54 MC 8333 KC

to

7425 KC

to

9000 KC

SECTION

II

INSTALLATION

2-1.

UNPACKING.

Mter

it

closely occurred be carrier check

during

apparent,

stating

all

structions

2-2.

LOCATION.

The

provides

adequate circulation Avoid on

2-3.

excessively

or

near

POWER

The

105-volt

to

consumption

If

in contact prior

an

AC er

cord can unit,

2-4.

CRYSTAL-VFO

The

two

jacks,

commodate

separation

unpacking

for

any

possible

transit.

file a claim

the

shipping

before

unit

of

removing

should

air

radiators

SOURCE.

transmitter

125-volt,

is

175

IMPORTANT

doubt

your

to

inserting

power

into

cause

extensive

requiring

CRYST

mounted

.093

"diameter

(similar

extent

labels

be

space

through

warm

and

60

watts.

about

local

outlet. the

wrong

costly

AL-

VFO

to

type

the

transmitter,

damage

Should

which

any immediately of

damage.

and

tags

or

destroying

placed

around

in a location

it

the

cabinet

locations

heating

is

designed

cycle,

the

vents.

AC

power

current.

power

the

power

Plugging

power

damage

repairs.

RECEPTACLE.

receptacle

on

the

front

pins

with

FT-243

crystal

examine

may

sign

of

with

Carefully

for

special

to

permit

openings.

such

as

to

operate

source,

company

plug

into

the

pow-

source

to

the

consists

panel,

1/2"

have

damage

the

in-

them.

that

free

those

on

Power

of

to

ac-

center

holder).

When

high

(hot)

jack

and

2-5.

The closed provides or

an

automatic the

KEY nected strip

located

tacts

are

when

the

2-8).

2-6.

rear

of bulkhead type

75-MC1F

2-7.

tenna radiate figure BOOK

mation

2-8.

chassis

auxiliary

position When TUNE,

are

r----

I

L

(FEET)

• I

FREQUENCY

468

(MC)

I

not and 2 are an

antenna

switch

~"f-M~'="',,{L.~l'Jo..A.A..LJ~,=,,~--rINS~

COAXIAL LEAD

figure

parallel plug

is transmitter switching remote push-to-talk

4),

The

key

to

ation

or

must

be

ing

wire

Figure

2.

Coaxial

Dipole

Feci

Half-Wave

Antenna.

092-010130C

an

external

side

of

the

ground

KEY

RECEPTACLE.

KEY

jack, a standard

circuit

for

type

the

connection

keyer

jack,

the

keying

to

terminals 3 and

on

the

rear

connected

plug

is

removed

MICROPHONE

The

microphone

the

chassis,

receptacle

microphone

ANTENNAS.

It

is

suggested

fed

with a 50-ohm

maximum

2).

Refer

or

similar

concerning

ACCESSORY

A

four-terminal permits

power

to

publications

transmitting

connecting

equipments.

The

FUNCTION

electrically

the

FUNCTION

or

STANDBY

electrically

connected

changeover

controls

the

3).

Terminals

with)

removed

device

control

the

to

3

KEY

from

be

connected

such

switch,

switch

transmitter

terminals 3 and

keying removed

from

removed

VFO

is

used,

VFO

output

side

to

the

black

jack

located

(T.O.

on

of

ahandkeyer, a bug,

Keyer).

instrument

4 of

the

of

the

chassis.

in

parallel

with

from

the

CONNECTOR.

connector,

is

an

Amphenol

and

will

accept

plug.

that a half-wave

the

coaxial

from

ARRL

cable

the

transmitter

ANTENNA HAND-

for

antennas.

TERMINAL

strip

on

the

switch connects switch

position,

connected.

to

auxiliary

operation

in

the

terminals 1 and

is

in

either

these When equipment

relay,

the

of

and 4 connected

jack

terminals,

the

KEY

jack,

to a remote

as

the

SX-140

or

separate

on

the

microphone

may

be

keyed

4.

For

remote

these

terminals,

the

KEY

jack

from

terminals

connect

to

the

red

jack.

the pin

two-conductor,

the

fro'"'t

panel,

In

addition

may

be

con-

four-terminal

These

the

jack

located

type

an

con-

KEY

jack

(see

para.

on

the

75-PC1M

Amphenol

dipole be

an-

used

(see

detailed

STRIP.

rear

infor-

of

the

transmitter

AM

or

CW

the

OFF,

terminals

such

FUNCTION

the

relay

across

permit

when

(see

(in the the

control

Receiver,

leads

from

the

(see

figure

by

connecting

control

and

the

3

oper-

key

short-

and

plug

to

2.

1

as

a

4.

3

SECTION

III

3-1.

tary

switch,

of

operation

FUNCTION

The

FUNCTION

is

used

as

1.

OFF from

2. TUNE oscillator the

modulator ges. DRIVE on

the

meter.

3.

ST

ANDBY

the

DC from is

made

refer

CONTROL.

control, a five-position

to

select

indicated.

position:

the

power

position:

and

Grid

current

control

RF

OUTPUT

position:

power

the

internal

for

to

paragraph

the

AC

power

transformer

power buffer and

final is

for

maximum

the

supply

circuitry.

remote

2-8.

OPERATING

ro-

transmitter

is

disconnected

is

applied

stages

amplifier

adjusted

- GRID CURRENT

negative

is

disconnected

control

mode

primary.

to

the

but

not

to

sta-

with

the

indication

side

of

Provision

switching,

CONTROLS

A unique allows through ST

ANDBY better ing

4.

5.

3-2.

The

multi-section

voltage

from

AM oscillator, final

CW to the and to the

screen

tube which, in the

as a series

BAND

NOTE

feature

current

the

to

bleeder

position,

regulation

STANDBY position:

buffer,

amplifier

position:

buffer

oscillator

grid

through regulator

SELECTOR

rotary

switch

of

the

be

to

power

and

power and

used

thus

final

CW

power

constantly

w

hen

supply

fed

in

the

providing

when

switch-

AM

or

CW.

is

applied

speech

amplifier,

modulator is

applied

directly

amplifier

and

final

amplifier

the 6DE7

position

modulator

functions

tube.

CONTROL.

is a six-position,

to

select

the

to

the

stages.

plate,

pro-

SX -140

RECEIVER

CONTACTS

OF

FUNCTION

SWITCH

AUXILIARY

SWITCHING

CONTACTS

SWITCH CONTACTS SHOWN IN

OR

RECEIVING

POSITION

Figure

NORMAL

3.

Transmitter

Controlling

an

Antenna

HT -40

TRANSMITTER

CONTACTS OF FUNCTION SWITCH

~

STANDBY

EXTERNAL

POWER SOURCE

Relay.

4

S x -

140

RECEIVER

HT -

40

TRANSMITTER

per

inductance

network

3-3.

used This capacitor the fier is output

3-4.

for

each

DRIVE

The

DRIVE

to tune the

control

of the

buffer

stage.

stage Operation

impossible

frequency.

CRYSTAL-VFO

The CRYSTAL-VFO

switch either external

3-5.

which

crystal

VFO.

RF

OUTPUT-G'RID

SWITCH.

The

RF a DPDT switch

final

slide

the

meter

amplifier

load.

EXTERNAL

POWER

SOURCE

in

the

Figure

driver

and

4.

Transmitter

final

amplifier

band.

CONTROL.

control

plate

also

functions

pi

network

and the input

to tune to a

is a variable

circuit

of

this

harmonic

of the

as

between

control

buffer

the input tuning

the

to

the

final

is

of

such

the

SWITCH.

permits

controlled

switch

the

transmitter

or

is a SPDTslide

to

operate

CURRENT

OUTPUT-GRID CURRENT

switch

which

either

(6DQ5)

permits

into the

or

across

grid

the

operator

circuit

the

RF

pi

capacitor

stage.

output of

ampli-

that

it

desired

operate

from

an

switch

is to

of the

output

Controllecl

3-6.

capacitor

which

matching

3-7.

capacitor amplifier quency.

3-8.

tentiometer controls audio

3-9.

functions

grid the

to

flickering

SWITCH CONTACTS

OR

RECEIVING

by

Station

PLATE

The

adjusts

PLATE

The

Receiver.

LOADING

PLATE in

LOADING

the output of the

the

transmitter

TUNING

PLATE

which

tunes

(6DQ5) to the

MIKE

GAIN

The MIKE GAIN

located

the audio Signal

amplifier

tube V3B.

MODULATION INDICATOR.

The modulation and

as a voltage

of

the

transmitter

In

AM

indicate

on

6DE7

80%

regulator

is

keyed.

operation,

modulation when the

and off.

SHOWN

IN

NORMAL

POSITION

092-00962.9B

CONTROL.

control

pi

network

plate

load

to

impedance,

the

antenna.

CONTROL.

TUNING

the

control

plate

circuit

desired

operating

CONTROL.

control, a I-megohm

on the

rear

applied

AND

keying

reference

tube

the

indicator

of

to

KEYING

indicator device

and

is a variable

section

thus

is a variable

of

the

final

fre-

po-

the

chassis,

the

grid

of the

lamp

for

the

will

dim

has

been

set

lamp

is

just

as

5

'"

::n

CQ

c:

;

~

....

..,

Q

::s

'"

3

-

CD

-

..,

."

..,

0

::s

-

."

Q

::s

CD

-

()

0

::s

..,

-

0

;;;-

PLATE

LOADING

TRANSMITTER

MODEL

HT-40

0

FUNCTION BAND SELECTOR DRIVE CRYSTAL

20

0

15

6

.@.

C.w.

STAND;~M~

TUNE

OFF

4@

80

PLATE

TUNING

•

R.F.

OUTPUT -GRID

r:=r

II

the

0

CRYSTAL

VFO

G

~

G

VFO GRID CURRENT

hallicrafters

R.

F.

OUTPUT

~

CURRENT

~

®

@

KEY

II

co.

092-

012051

SECTION

IV

OPERATION

4-1.

has

adjustment does ted

ments mitter

4-2.

formed

CW

GENERAL.

The

tuning

been

simplified

to the

not

mean

successfully

are

made. A clean

requires

TUNING CW

OPERATION.

The

following tuning

prior

mode.

procedure

in

desired

that

the

transmitter

when only

good

operating

PROCEDURE

to

operating

EQUIPMENT REQUffiED

1.

2.

50-ohm,

40-watt Crystal

monic desired external

non-inductive

light

bulb

with

frequency

transmitting VFO.

PROCEDURE

1.

Set

the

controls

MIKE

GAIN.

. . • .

FUNCTION . . . . .

BAND

SELECTOR

for

design

to

frequency.

rough

signal

from

technique.

procedure

the

transmitter

(see

its

fundamental

corresponding

frequency

as

indicated:

..

Maximum clockwise

..

OFF

..

Desired

the

transmitter

permit

However,

may

tuning

any

FOR

must

dummy

figure

band

rapid

be

opera-

adjust-

trans-

be

per-

in

load

6).

or

harto or

counter-

this

the

or

the

an

3.

It

may

be

plug

into

at

this

time

the

transmitter. necessary closed

circuit

desirable

the KEY

to allow the

since

type when

to

jack

and

operator

However,

the

jack

insert

close

this

the

to

is

key key

tune

is a normally

the

key

plug

not

is

removed.

4.

5.

Connect connector plug utility

Set

allow up,

the

dummy

on the

line

cord

rear

into a

load

chassis

outlet.

FUNCTION

control

approximately 5 minutes

then

set

FUNCTION

to

the

antenna

panel

and

117-volt,

AC

to STANDBY,

to

warm

control

to

TUNE.

6.

Adjust

flection

a

7.

RENT Set

switch

8.

Rotate

In

steps

of

the

TUNING

which

Tuning knob

be

near

bands

20

to 6 meter

correct

DRIVE

on the

meter.

RF

to the FUNCTION

9,10,

PLATE

controls

is

nearest

dials.

100 on

and

progressively

setting

control

RF

for

OUTPUT-GRID

RF

OUTPUT

control

NOTE

and

11

the

final

LOADING and

will

be

the

the 100

These

the

mark

settings

80 and 40

lower

bands.

will

On 6

be

between

meters,

maximum

CUR-

CURRENT

position. to CW.

settings

PLATE

setting

on

the

will

meter

on

the the

0 and

de-

20.

DRIVE . . . . • . . .

CRYSTALRF

OUTPUT-GRID..

VFO

CURRENT PLATE

80 10

PLATE

80 10

2.

LOADING

to

20

meter

and 6 meter

TUNING

to

20

meter

and 6

meter

Insert the

crystal

CRYST

bands

band

bands

band

AL-

. .

of

.. ..

::

.. ..

desired

VFO

Center

of CRYSTAL GRID

CURRENT

Near

100

Near

0

Near

100

Near

0

frequency

socket.

range

into

Figure

6.

Light

Bulb

Used

as

092-

Dummy

0101528

Load.

7

9. Adjust maximum

ter.

10. Adjust maximum

ter.

PLATE

output

PLATE

output

TUNING

indication

LOADING

indication

control

on the

control

on the

for

me-

for

me-

dure

for

CW

operation

through

step

12

except

that plugged in. The following the tuning of

the

transmitter

1. Connect the connector

on the

in

Paragraph the

CW

procedure

for

AM

microphone

rear

of the

4-2,

key

need

will

complete

operation:

to

the

chassis.

step not

MIKE

1

be

11.

12.

13. Rotate the

14.

4-3.

TUNING AM

The

for

AM

operation

Repeat

output

meter Turn

TION load

steps

is

obtained; note the

reading.

transmitter

control,

and

connect

tenna.

FUNCTION and note output impedance as

that indication same line

is

noted;

of the

as

that open, a if

antenna

is

will

noted

proximately noted.

If

the

proper

meter,

the CW

operation.

OPERATION.

procedure

the

PROCEDURE

for

is

identical

9 and 10

off

until

with

disconnect

the

transmitting

control

indication.

If

approximately

dummy

be

higher

zero

indication

tr

ansmitter

load,

approximately

in

step

indication

line

is

indication

is

FOR

tuning the

to the

tuningproce-

maximum

approximate

the FUNCthe dummy

an-

to

CW

the

antenna

the

same

the

meter

the

11.

If

antenna

will

be

shorted,

obtained

is

will

ready

ap-

be

on

for

transmitter

2. Rotate the FUNCTION note

the

approximately

noted

in

step

3. While the

talking

desired

phone and

dicator control lamp

vides

Never

lamp,

clockwise

just

75%

over-modulate

Over-modulation

4-4.

eration crafters tains centers

formed

continuous ulation

SERVICE

QUESTIONS.

For

of

dealer.

an

extensive where promptly

indicator

any

further

the

any

bright

OR

transmitter,

The

and

control

meter

indication,

one

fourth

11

of

paragraph

in a normal

distance

observing

the

voice

from

the modulation

advance the MIKE GAIN

until

the

flickers

to

on and off.

90%

AM

the

will

be

flickering

modulation.

transmitter. indicated

of

the

lamp.

OPERATING

information

regarding

contact

Hallicrafters system required

efficiently

Company

of

authorized

service

at a nominal

to

it

should

indication

4-2.

level

the

micro-

indicator

This

by

mod-

your

Hallimain-

service

will

be

AM;

be

at

in-

pro-

op-

per-

MODULATION FREQUENCY

8

APPROX.

75%

MODULATION

Figure

FREQUENCY

7.

Carrier

MODULATION FREQUENCY

100%

OVER

Modulation

MODULATION

\J

Patterns.

100

% MODUL.ATION

092-010131

charge. ters location or

factory

All

display

of

telephone

Do

not

unless Hallicrafters sibility

for

The privilege tion of corporate

of making

equipment

these

Hallicrafters

the

sign

the

one

nearest

directory.

make

any

instructed

Company

unauthorized

Hallicrafters

revisions

and

assumes

revisions

Authorized

shown

at

you,

service

to

will

not

shipments.

Company

in

earlier

the

consult

shipments

do

so

accept

Service

right.

your

by

the

For

dealer

letter.

respon-

Cen-

to

The

the

reserves

in

cur~ent.prod~c

no

oblIgatIon to

models.

the

10-

THEORY

5-1.

circuit fundamental through, produce

Circuits

operation

20

wave) tion phone

5-2.

modified

In

plate

in ments shunted The mon

tion. Coupling

grid

nal jacks to the

connected

(6CX8) and connected the VFO VFO to STANDBY and

GENERAL.

The

transmitter

or

external

Signal

or

operated

the

desired

are

employed

at

any

15 10 and 6

, , , . .

or

AM

(amplitude modulation).

or

carrier

control

utilizes a built-in

VFO

for

generating

that

is

to

as a harmonic

output

desired

meter

frequency

in

the

frequency

bands

modulation

be

amplified

generator

on

transmitter

in

on

CW

Screen

is

employed

the

each

the

(continuous

transmission.

CRYSTAL-OSCILLATOR.

The

triode

Pierce

this

circuit

to

the

series

with

consist

by a

plate

circuit

fixed

plate

is

accomplished

When

VFO,

the

and the VFO

jacks.

through through

position

position,

section

Type of

feedback

grid

by

means

the

crystal.

of a

lOOK

50

mmf

utilizes

load

from

operating

crystal

output

The high

the

ground

the

to

the

triode

does

of

VI

crystal

energy

of a 5000

The

ohm

capacitor

a 2. 5

for

all

frequencies

the

oscillator

with a 50

the

transmitter

is

removed

terminals

side

red

jack

side

black

jack

RF

ground. When

section

not

operate.

(6CX8)

oscillator

is

fed

mmf

grid

return

loading

MH

choke

plate

mmf

capacitor.

from

are

of the VFO

to the

of

the

and

grid

VFO

switch

(VIA)

is

circuit

as a com-

with

connect~d

Sl

is

SECTION

oscillator

desired

straight

to

band.

to

permit 80,

40,

1OJec-

for

used

in

circuit.

from

the

capacitor

ele-

resistor

capacity. of

opera-

to

buffer

exter-

the

pin output output

is

switched

IS

of V1B

is

Sl

in

the

OF

OPERATION

5-3.

as a buffer oscillator lified

C. The

UH tube

arate put work connected proper

sible with the DRIVE bility tenna imum.

a

5-4.

beam through bands band. The shunt-fed

section with nated matching the antenna. A through separate so

that a minimum tween circuit

5-5.

a

basic 5 mil

The

functions:

V

BUFFER-MULTIPLIER.

The pentode

multiplier.

circuit

or

multiplied

buffer

choke

coupled

V2

(6DQ5) by

inductances

is

tuned

with

output

is

to

selection

to tune to a

of

undesirable

and

keeps

FINAL

The

final

powered

amplifier

and

as a frequency

final

RF

network. The input of the

the

PLATE

with the

the

10

meter

coil

them. A sensitive

to

measure

RF

OUTPUT-GRID

METER.

The

RF

meter

and

section

The

to

the

by

this

plate

load

to

the

means

for

each

the DRIVE

terminated

the

6DQ5

grid

of

coils

harmonic

capacitor.

signals

television

AMPLIFIER

amplifier

pentode

tube,

on the 80

amplifier

choke

capacitively

TUNING

PLATE

plate

impedance

tapped

coil

bands;

(L9)

connected

of

mutual

grid

OUTPUT-GRID

movement

its

circuitry

of

VI

signals

grid

of the

stage

consists

grid

of the

of a

pi

band.

capacitor

with a 9

circuit.

in

each

of

the

This

being

interference

STAGE.

stage,

operates

doubler

plate

capacitor,

LOADING

to

(L10)

the 6

meter

at

inductance

meter

(M1)

current

CURRENT

graduated

perform

(6CX8)

are

is

fed

buffer

operating

of a

shunt

final

network

The

network and

mmf

Because

band,

it

output

reduces

fed

utilizing

as a straight

through

on

the 6 meter

load

consists

coupled

network

and

capacitor

the

impedance

isusedfor

band

right

angles

is

used

and

output

in 5 units

two

operated from

the

and

amp-

in

class

fed

100 amplifier with

sep-

in-

the

net-

capacitor

ofthe

is

impos-

frequency

the

possi-

to

the

~

to a

m1O-

a 6DQ5

10

meter

of a

to

the

pi

is

tuned

is

termi-

for

of

the 80

uses

to L10

exists

in

be-

this

power.

meter

is

(0-5).

important

a

9

1.

2. With

5-6.

SPEECH

& SERIES

The s peech a

stem con

sis

(12AX8) and

coupl

ed

and

quate

sig

nal

sec

tion

of

si

stan

ce

and acts The scre element) thode co

mponent

fu

ll

tube

follower

to

the scr

thr

ough a

en

becomes

With

the

switch RENT c

i

ti antenn on

18 wa

for 36

position,

urrent

ndicates

swit

on,

the output

a can

the

met

tts

e,

if

watts

can

approximately 1 milliampere.

ch

er

when

a

ar e

antenna (2.0 x 18

AMPLIFIER,

VOLTAGE

mplifi

84

the

final

be

measured; each

84

in

the

power

be

measured. represents the

V8WRi

deflection

bein

g delive

==

36).

er

section

in

the

GRID

amplifier

division

RF

OUTPUT

delivered

Each div

approximatel

s 1 to 1. Ther e-

of 2 is indicat

r ed to

MODULATOR,

REGULATOR.

of

the

audio

ts of the two triode sections of V3

one

tr iode

operated

inp

ut

to the modul

V4). T

he modulatot' has a low pl

as a high

impedance

an appr

impedance. The

of

the c

een .5

mfd

section

in

cas

cade

level cathode foll

of the 6DQ5 (the

eciab

atho

de foll

of the

final

capacitor

of

V4 (6DE7) RC

to

deve

lop

an

ator (seco

nd

triode

ate

modulated

le po

rtion

of the

audio frequency

ower is

amplifier

applied

(6DQ

to permit modula-

CUR-

grid

posi-

to

the

isi

on

ed, the

sy-

ade-

re-

ower .

ca-

in

5)

tion

of

the

screen.

phone

(V1A)

c

ould

jack

and

eliminates

be

caused

During CW section age

y

to

c

ircuits.

5-7.

obtained

of

Regul

the crys

POWER

The

the

ator

tal

DC volt

by rectifying the AC vo

secondar y of

wave volt

ode

pl y

together to

rs

age

rec

tifi

is

accomplish

with

.

er s. A

Another transformer th

e tub

es

in the tr ans m

eve

To pr ing conduct power lin pow

er tra

ed back thr e, nsformer

An

RF

filter

between

the

grid

of

the

by

6DE7 Tube osc

illator

distortion

RF

across

operation,

is

connec

and

supplies Reg

and

MIKE

in

the the

ted

fin

preamplifier

the

system

microphone jack.

modulator

as a

series

ulated Volta

al a

mplifi

SUPPLY.

age

to

opera

te the

transmitt

lta

ge acr

the power transformer

T1

doubler circuit using two s i

deq

uate

ed

the

choke and out

seco

fur

nis

filterin

by the voltage doubler circuit,

ndary

hes filame

g of

windin

nt vo

the power

put

filter cap

g of the pow

lta

ge for a

itter.

nt television

an

LC filt

interference

ough

the

er

is conn

power co

ected

primar y.

the

micro-

er scre

oss

wit

h a fu

lico

fr om be-

r d to

across

which

(V4B)

Volt-

ge en

er

is

the

lln di sup-

aci

er

ll

of

the the

-

LlO

OU

TPUT PL ATE

TANK COIL

110

M TO BOM i

--+

T I

-----

PLATE L

C25

OAD

CAPACIT OR

-,.~,.---

ING

PI LIGHT

LMI

V2

6005

LOT

L9

OUTPUT

PLATE

TANK CO

16M)

CI 7

PLATE T UNI NG

CAPACITOR

LI

3

OUTPUT

PLATE

" 5 "

CHOKE

MI

METER

0 9 2 -

Ll2

FILTER

CHOKE

VI

6CXB

V4

GO£?

012

663

IL

LM2

M

ODUL

ATI ON

INDICATOR

10

Figure

8. Top

View

of

Transmitter

Chassis.

SECTION V I

6-1.

CHASSIS

Remove

from

the

rear

including

the

front

net.

6-2.

TUBE

REPLACEMENT.

Access

obtained

(see

refer

6-3.

by

para.

to

6-1).

figure

TROUBLE

In

this

removing

transmitter,

communications

MICROPHONE

CONNECTOR

REMOVAL.

the

10

of

the

panel,

AND

to

the

For

8.

SHOOTING.

equipment,

J 4

No.6

cabinet.

out

PILOT

tubes

the

chassis

tube

thread

forming

Slide

the

front

LIGHT

and

pilot

from

and

pilot

as

in all

maintenance

RI6

MIKE GAIN

SERVICE

screws

the

chassis,

of

the

cabi-

light

may

be

the

cabinet

light

location

well-designed

and

re-

AC

CESSORY

TERMINA L S

TRIP

DATA

pair

problems

and

replacing defective

this

nature

tube

substitution. faulty for

proper

values.

Table 1 provides

the

transmitter. incomplete proper can

only and a complete H

owever, pretested table

will

in

most

XV2

are

tubes

occur,

as

operation

be

dete

each before

provide

instances.

FRI

25MC

FILTER

voltage,

are

genera

easily

Should

refer

It

is

there

are

of

any

rmined

knowledge

component

it

is

adequate

ANTENNA

CO

NNECT

lly

confined

tubes.

isolated

malfunctions

to

the

resistance,

suggestions

possible

numerous

piece

of

with

elaborate

of

placed

in

servicing

J5

OR

to

Malfunctions

and

corrected

schematic

and

for

that

this

causes

equipment

instruments

the

entire

the

transmitter

the

unit,

information

checking

other

than diagram capacity

servlclllg

table

for

which

circuit.

thus

of

by

is

im-

is

the

XV3

XVI

XV4

J 3

KEY

JACK

54

RF

OUTPUT

GRIO

CURRENT

BLACK

JACK

Figure

JI

RED XTAL PIN

JACK

9.

J2

Bottom

VF

51

O

CI5

DRIVE

CAPACITOR

View

S2A

of

Transmitter

l6

L7

115M) 110M) 16M)

LB

Chassis.

092

S2C

S2B

L3

180M)

l4140MI

l

5120

- 0 12664

M)

11

Table

l.

Trouble

Shooting

Information.

Symptom

No output on any band

No

AM

modulation on any band;

operation functions

No

output on

Schematic

Symbol

3,

8, 10, 11,

C1,

C2,

9,14

5,

6, 13, 16, 20, 21, 23, 24,

C4, 30,

33,

C7 C15 C17

C18

C19 9 C22 C25 C26 100

C29,

35 C32 0.1 C34 C36 C37 C38 C44, 45, 46, 47

C50 750 C51 22

R1,4

R2 47K

R3,1l

R5 470

R6, 20 12K R7 2.5Kohm, 7W, Wirewound R8,13

R9 39K

RIO R12 R14 2.2

Description

CAPACITORS

12,31,39,

0.005

mid.,

Cer.

Disc

50

mmi.,

Cer.

Disc

40, 41, 42, 43

0.001

mId.,

Cer.

Disc

0.01

mid.,

Cer.

Disc

6-37

mmf.,

DRIVE

14-140

mmf.,

PLA

TE

0.001

mid.,

Cer.

Disc

mmi.,

Duramica

100

mfd.,

Electrolytic

33-1290

PLA

TE

mm!.,

Cer.

Disc

100

mm!.,

Cer.

Disc

mfd.,

Molded

om

mid.,

Cer.

Disc

0.47

mid.,

Molded

0.005

mfd.,

Cer.

Disc

0.05

mfd,

Disc

40

mfd.,

Electrolytic

mmi.,

Duramica

mmf.,

Duramica

lOOK

ohm

22K

ohm,

ohm

ohm,

1 megOhm

ohm,

10K

ohm

4.7K

ohm

megohm

anyone

48, 49

500V, GMV,

600V, 10% MIKE GAIN

27,28,

1000V, GMV, R23

500V, +80-20% R25

Variable,

TUNING

3000V, 20%,

300V,

2%,

12 VDC,

mmi.,

Variable,

LOADING

2000V, 10%,

1000V, 20%,

600V, 10%

Paper

1400V, GMV, 400V, 10%,

Paper

1000V, 20%,

50V,

Ceramic

350 WVDC,

300V,

2%,

300V,

2%,

'RESISTORS

2W

1W

(AM

or

properly

band.

SERVICE

Hallicrafters

Part

Number

047-100442

047-100744

047-101172

047-100224 048-000499 048-000496 047-100397 481-131090 045-100619

048-000519 047-001601 047-001397 499-031104 047-200752 046-001337 047-100523 047-001144

045-000723

481-161751 L13

481-151220

451-252104 451-252473 451-652223 451-252471 451-652123 024-001357 451-252105 451-352393 451-252103 451-252472 451-252225

CW)

CW

VI

TI,

or

LI6

1.

2. components

Shorted antenna.

3. V3

1.

2.

1.

or

Microphone in

the audio

Defective

Possible

V2 defective.

and/or

V4

defective.

interstage

Cause

associated

defective.

and/or system

band.

2. BAND

Oscillator

3.

REPAIR

Schematic

Symbol

17,

19

R15,

R16 R18

R21 R22

R24 1K

R26 20 ohm,

R27, 28 56K

R29 68K R30 R31 100 ohm, 5W, Wirewound

'RESISTORS

otherwise

L1 2.5 MH, 125 MA; L2 L3

L4 L5

L6 L7 L8 L9

L10 L11 1 MH, 200 MA,

L12 Choke, L14,15

L16 L17 25 PSI Tl

Sl S2A, B, C Switch, Rotary; BAND Shield,

S3 S4

Description

'RESISTORS

470K

ohm

1

megohm,

10 lOOK

2.2K

5.6K 56K

100

specified.

COILS AND TRANSFORMERS

100 UH, 200 MA;

Coil,

Network

Coil,

Network Coil, Network

Coil,

Network Coil, Network

Coil,

Network Coil, Coil,

(80

0.425

3.8 Coil,

Parasitic Transformer,

Switch,

SELECTOR

Switch, Rotary;

FUNCTION Switch, PUT

Variable,

megohm

ohm,

1W ohm ohm,

1W

ohm

7W,

Wirewound

ohm,

2W,

ohm

1/2

are

10%,

Interstage

(80

M)

Interstage

(40

M)

Interstage

(20

M)

Interstage

(15

M)

Interstage

(10

M)

Interstage

(6

M)

Output

Tank

Output

Tank

thru

10

M)

Filter

MH;

Plate

UH;

Line

Choke

25

MC,

Parallel

Series

Choke

SWITCHES GRID

SPDT;XTAL-VFO

DPDT;

- GRID

CURRENT

(cont.)

20%

watt,

RF

Pi Pi

Pi

(6

RF Output

Filter

Assy

Power

RF

PARTS

carbon

choke

M)

Choke

Filter

OUT-

SELECTOR defective.

Crystal

LIST

Hallicrafters

Part

Number

451-252474

025-001949 451-252106 451-352104 451-252222 451-352562 451-252102 451-252563 024-001356 451-653563 451-252683 451-252101 445-012101

type

unless

053-000597 053-000644

051-003296 051-003297 051-003298 051-003299 051-003300

051-003301 051-003308

051-003302 053-000598 056-000446 053-200426 053-000607 051-003257 051-003256 053-000645 052-000852

060-200967 060-002413 060-002417 060-002260

Schematic

Symbol

J1 J2 J3 J4 J5

XV1,3,4

XV2 TAl

CR1,2 CR3

VI V2 V3

V4 6DE7;

LM1 LM2

PL1 M1 N1

JACKS, SOCKETS AND CONNECTORS

power supply

associated

components

defective.

coil

for particular

defective.

Description

Jack, Pin;

Jack,

Connector, Microphone Connector, Coaxial

(Antenna)

Socket, Tube; 9-Pin

Socket,

Terminal

(4

TUBES,

Diode, Doubler

Diode, Germanium (Meter

Circuit) 6CX8; 6DQ5; 12AX7; Amplifier

Amplifier

and

Pilot Modulation Indicator Lamp,

Base,

Bracket, Cabinet Cable,

Foot,

Insulator, and Knob, FUNCTION

BAND Knob, DRIVE Knob, PLA AND

Line Cord

Lock, Line Cord

Meter, Neon

Panel, Front

Shield,

Spacer

Washer,

(Stand Off

Mtg.)

Black

Pin;

Red

Phone;

KEY

Tube;

Board,

contacts)

LAMPS AND

Silicon

Circuit) Type

Oscillator

RF

Output

Microphone

1st

3rd

Audio

Modulator

Lamp, Neon

Neon

MISCE LLANEOUS

Tube

Shield

Tube

Coaxial,

Plastic

Stand Off (L9

L10

mtg.)

SELECTOR

TE

PLATE

RF

OUTPUT

CURRENT

light,

type

Electrical

Tube

(Vl,

(C17

and

Flat

Insulator

Octal

Accessory

(Voltage

Type

1N295

and

2nd

Amplifier

(V1,

Mtg.

RG-58/U

and

LOADING

TUNING

NE-2H

3,

C25

Fiber

Hallicrafters

Part

Miniature

RECTIFIERS

1N3255

Buffer

Pre-

Audio

3,

4)

(V2)

-

4) mtg.)

Number

036-000295 036-000294 036-100002 029-100566

010-100056 006-000947

006-000948

088-002411

019-002939-03 019-301980

090-901418 090-901420

090-900038 090-901419

039-000613

039-000673

069-001417 067 -008881 150-901138 087-100960 016-201072

008-006149 015-001725

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464

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