Hallicrafters HT-46 Operating And Service Instructions

'Bllicraliers

OPERATING

AND

COMMUNICATIONS

SERVICE

TRANSMITTER

MODEL HT-46

INSTRUCTIONS

~ARRA.NTY

"The Hallicrafter's Company warrants each new radio product manufactured and agrees to remedy any change mal installation, use and service discloses unit saler, from whom purchased, examination, with days from the date of sale to original purchaser and provided that such examination discloses in our ;udgment that it is thus defective.

This warranty does not extend have been sub;ected to misuse, neglect, accident, incorrect wiring not our own, improper installation, furnished altered outside of our factory

nor to accessories used therewith not of our own manufacture. Any

be remedied saler without charge to the owner.

This warranty is in lieu of all other warranties expressed or implied and other liability in connection with the sale of our radio products:'

by

it to be

free.

from defective material and workmanship

for

any part of any unit of its manufacture which under nor-

is

delivered by the owner to our authorized radio dealer, whole-

by

us, nor extended to units which have been repaired or

where the serial number thereof has been removed, defaced

part of a unit approved

or

exchanged by the authorized radio dealer or whole-

no representative

such defect

all

transportation charges prepaid within ninety

or

person

or

to furnish a new part in ex-

such

defect, provided the

or,

authorized service center, intact,

to

any

of

our radio products which

or to use in violation of instructions

authorized service center, nor to cases

for

remedy or exchange hereunder will

is

authorized to assume

for

or changed,

for

us any

Figure

1.

Hol/icrafters'

Model HT-46

Transmitter

.

156-006 958

SECTION

I

GENERAL

DESCRIPTION

1-1. INTRODUCTION.

The

Hallicrafters

Model

HT-46

Transmitter

is a precision

built

compact,

high

performance

transmitter

of

advanced

design.

The

transmitter

utilizes

nine

tubes

and a single

signal

conversion

heterodyning

system

for

transmission

of

single-

sideband

(88B)

and

continuous

wave

(CW)

code

signals

on

the

80, 40,

20,15

and

10

meter

amateur

bands.

The

versatility of the

HT-46

transmitter

permits

operation

as a self-contained

station

transmitter

or may

be

used

in conjunction

with

the

Hallicrafters

Model 8X-146

communications

receiv

er

as a tran

s ce

iver combination.

The

transmitter

is

supplied

with

push-t

o-

talk

control

with

provision

for

the

addition

of the

Hallicrafters

Model

HA-16

for

voice controlled

88B

operation.

Amplified

Auto

matic

Level Contro

l (AALC )

c

ircuitry within the tra

nsmitt

er he

lps preve

nt

"splatter "

due

to se ve

re

"flat-toppin

g" of the

final

amplifi

e r when

unintentionall

y ove

rdri ven.

The

Model

HT-46

may

be

operated

as

a

complete

transmitter

or

as

an

exciter

for

driving

a

linear

amplifier

such

as

the

HT-45,

HT-33B,

HT-41

or

others.

If

others

are

used,

they should

be

capable

of

supplying

a 50

ohm

termination

for

the

Model

HT-46

transmitter.

Other features

of the

Model

HT-46

trans-

mitter

include

:

•

Optional

operation

as

transceiver

with com-

panion

Model

8X-146

receiver

or

as se

lf-

c

ontained

transmitt

er / e

xciter

unit

.

• An

accurately calibrated

VFD

with exce

llent

me

chanic

al

and

temperature

stabilit

y.

•

Constant

tuning rat

e on

all

bands.

• Upper

and

lower

sideband

operati

on on

all

bands

80

throu

gh 10

meters.

• A cr y

stal

latti

ce

filt

er

with 6 poles

for

o

ptimum

sing

le

sideband

r e

sponse.

•

Combinati

on

final

amplifier

plat

e c

urrent

and

RF output

volta

ge

meterin

g for exact

tunin

g.

• 70W to

lOOW

PEP output cover

s exciter r e-

quir

eme

nt

for mo

st 1 KW

linear a

mplifi

er s.

• Keyed

RF car r ier for

CW

oper a

tion

with

s

hapin

g ne two

rk

in keying ci

r c

uit.

- 1

1-2.

TVI SUPPRESSION.

The structed cause

was layout selected arranged been

that itself.

television

given

used.

There

cannot

(TELEVISION

HT-46

to

suppress

full

of

the

to

avoid

to

prevent

are,

be

This

is

INTERFERENCE)

has

been

spurious

interference.

consideration

chassis.

prevented particularly

Components

undesired

parasitic

however,

designed

radiations

in

some

within

true

and

that

The

TVI

problem

the

design

specifically

resonances

oscillations

types

the

transmitter

in

fringe

con-

may

and and

have

of

TVI

recep-

tion

areas. low-pass put

is

recommended. cussion special

Amateur's

Radio

problems

Relay

Do not, attempt equipment familiar within

In

filter

of

measures Handbook"

League.

this

such

cases,

connected

of

this

IMPORTANT

under

to

operate

before

with

the

manual.

a good

at

the

For a more

that

may

be

type,

refer

published

any

circumstances,

the

Model

becoming

instructions

commercial

transmitter

complete

used

to

to the

by the

American

HT-46

completely

contained

outdis-

handle

"Radio

Vl 12AT7

V2

V3 6EAB 9

V4

Tuning

Heterodyne

Types

12AT7

6AH6

Ranges

Oscillator

of

Emission

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

First

and

Second

Amplifier Carrier

Microphone

MC

Amplifier Transmitter

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

Oscillator

IF

Amplifier

Crystals

SECTION

TECHNICAL

TUBES

Microphone

and

Amplifier

and

Mixer

.........

AND

Third

AALC

.

*10M *10M

*10M *Heterodyne

* 7.0

*21.0 *28.5

*Supplied with Model

. .

..

II

SPECIFICATIONS

FUNCTIONS

V5 V6

V7 V8

V9

Full

frequency

ranges 80M

40M 20M 15M

10M

mitter. crystals.)

Type

CR-23/U

Band

28.0

29.0

29.5

SSB -

CW

-

12BY7A

6HF5

6BA6 VFO

6EA8

OA2

coverage

as

follows:

3.5 to 4.0

7.0

to 7.5

14.0 to 14.5

21.0 to 21.5

28.0

to 28.5

28.5 to 29.0 29,0 to 29.5

29.5 to 30.0

oscillator

(Transmitter

in

HC-6

Selectable

Keyed

RF

MC MC

crystals

Frequency

21,500.000 KC 25,000.000 KC

32,000.000 KC 32,500.000 KC 33,000.000 KC 33,500.000 KC

HT-46. USB/LSB with carrier.

Transmitter Transmitter

fier

Heterodyne lator

Voltage

of

the

MC

MC MC MC MC MC

will

accommodate

Holder

and

Mixer

Regulator

Amateur

not

supplied

suppressed

Driver

Power

Crystal

bands

with full

Ampli-

Oscil-

in

eight

transset

carrier.

of

2 -

Frequency

Control

Type of Sideband

Transmission

Dial

Calibration

Frequency

Output

Power

Impedance

Input . .

Microphone

Audio

Response

Distortion

Control

Accuracy.

Stability

...

Input

Overall

Products Unwanted Sideband Carrier

Power Station

VOX Unit

SX-146

Transceive

Number

Dimensions

Net

Shipping Accessories

Suppression

Supply

Control

Input.

of

Weight

Requirements

Receptacle

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

Cable

Tubes

Overall

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

.......

Generation

.....

. . . .

..

.

.....

.

......

. . . . . . . . . .

Rejection

Capability

Outlet

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

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

Impedance

..........

........

.

..

.

...........

.

....

........

..

. . .

Self-contained SX-146

Solid

receiver.

state

(Nominal SSB -

CW

- Manual.

5 KC

increments,500

Less

than

indexing Less

than

minute

warm-up,

VFO

modulator

BW

= 2.1 KC).

Push-to-talk outlet cessory.

circuitry.

(Model HA-16.)

Rear inch two at

control

one

at

3.5

500

conductor

outlet.

pointer

MC.

cycles

and

or

transceive

with

at

microphone

VOX

key

KC tuning

width

drift

less

operation

9 MC, 6 pole

or

through

control

jack

accepts

phone plug.

is

Key

range.

error

in

first

than

across

hour,

100

cycles

with

crystal

control

optional

standard

circuit

the

dial

after

per

Model

filter

ac-

1/4-

also

after

fifteen

hour

thereafter. Fixed,

accepts SSB - 175

CW

0.005V RMS accepts

500 CPS (Max.) to 2200 26 DB (Min.) 50 DB (Min.)

50

..

117V AC, Rear

.

Amphenol

contacts,

control, Rear

.

type power

Rear

(Supplied.) operation

75

8

5-7/8 x 13-1/8

26

28 pounds

VOX attachment voice

Model three pound. Shipping

50

ohms.

RCA type phono plug. (Supplied.)

Watts

- 150

Watts

into

standard

below

DB (Min.)

below

50/60

chassis

type

speaker

etc.

chaSSis

71-6S

and

chassis

mounted

plug. (Supplied with

control

receptacle

Provides

with Model SX-146.

ohms.

Use

Amphenol

plus 1 voltage

pounds.

(Approximately)

Control

to

controlled

HT-46

tubes

through

and

Rear

PEP

Maximum

high

impedance

1/4-inch

CPS

PEP

output

PEP cycles, mounted

86-PM11

muting,

six-pin

for

VOX

inter-connection

regulator

x 11

inches

Unit

Model HA-16.

rear

of

Model

operation.

single sensitive Weight-1-l/2

chassis

mounted

load.

three

conductor

(Min.)

at

6 DB.

reference.

at

800 to 2200 CPS input.

output.

350

Watts.

eleven-pin

plug. (Supplied.)

receiver

socket

muting,

accepts

jumper

Adaptor,

accepts

cable

and

NO.

Model HA-16.

RCA

21-597

15

diodes.

(HWD).

Designed

HT-46

(VOX)

plug-in

VOX

Power

connector.

relay.

cabinet

Net

pounds

receptacle

Panel

connector

phone plug.

socket

accepts

Provides

relay

transmitter

Amphenol

wire.)

type

Provides

phono plug.

for

transceive

or

equivalent.

for

to

is

derived

quick

provide

from

Contains

Weight -3/4

(approximately).

Fuse

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

.. 3 amperes,

slow

blow, 3

AG

type.

- 3

SECTION

III

INSTALLATION

WARNING

LETHAL

HIGH

VOLTA

GE

IS

PRESENT

WITHIN

THIS

EQUIPMENT.

BE

CARE-

FUL

WHEN

INSTALLING THE

UNIT

OR

PERFORMING

CHECKS

OR

ADJUS T-

MENTS

INSIDE

THE

CABINET.

3-1.

UNPACKING

.

Ca

refully remove

the

equipment

from it

s

carton and

packing material

and

examine

it

for

possible dama

ge

which may

have occurred

in

transit

. Should any sign

of dama

ge

be

apparent

,

immediately

fil

e a

claim

with the c

arrier sta

tin

g

the extent

of the

damage.

Che

ck

all

shipping lab

els

and

tags

for

special

instructions be

for e r emoving

or

destroying

them.

3-

2.

LO

CATION.

The transmitt

er

may be

installed

in any

l

ocati

on

that

will

permit

free

circulation

of

air

thr

ough

the

ventilation

openin

gs

in

the

cab

ine

t.

Do

not

place

any

obj

ect

on

top

of

the

cabinet

in

o

S

X-146

INJEC

T

J3

t t

•

GROUND

AN1ENNA

J4

J5

a

manner

that

will

obs

tru

ct

normal

ventilation

.

Avoid

exce

ssiv

ely

warm locations

such

as thos

e

near

radiators

and

heating vents.

3

-3.

PO

WER

SOURCE

.

Th

e Mo

del

HT-46

Transmitter

is design

ed

to

operate

from

a 105/ 125V 50/ 60 cycle

AC

pow

er

Sour

ce.

Nominal line voltage

for

testing

and mea-

surements

is

117V

.

The outlet

should

be

capabl

e

of

handlin

g a 350 w

att load

with

good reg

ulati

on.

IMPORTAN

T

If

in

doubt

about

your

power sour

ce,

co

nta

ct your loc

al

pow

er

company

prior

to

inserting the

power

cord into an

y

po

wer outl

et.

Plugging the power

co r d

into the wr

ong

source

of

power can

cause exte

nsive dama

ge

to the

trans-

mitter.

Set the

OPERATION c

ontr

ol

at OFF (fUll

co

unt

er clockwis

e)

and

make

all

installation

con

-

nection

s b

efo

r e connecting the transmitter

to a

source

of

power

.

•

PI, J6

R33

MODEL

HT-46

105/125

VOLTS

50160

CPS

@\

POWER

CONSUIolPTION

350

WATTS

,

_'!/J

BIA

S

KEY

f

AMP

ADJ

J2

FI

156-0070

28

Figure

2.

Rear

View

of

Transmitter

.

4 -

SPKR

I

,~

HUH

,~

SX

GND

,~

I

146

GND

EXTOSC@

INPUT

.8

SLAVE

6~\~~~

®

ANT

®<

AHPHENDL

lY

PE

21-591

lh

TRANSCEIVE

CABLE

1-"

HT-46

,----5

q

SX-4~

®

ii

ANTENN

'\.7

L------J-------+-------+----t----

L-------+-------+---------t

3-4.

ANTENNA_

The

Model

terminate

into a line. A non-reactive results, modated results. antennas give

however

by

Any of

using

excellent

For antennas, book" by

the

refer

or

the"

American

Some be

provided

code

The

ANTENNA chassis nector. for

feed

apron

Use

line changeover details.

3-5.

GROUNDS.

All

station gether

with

connected

ground. provided for

this

An

on

purpose.

HT-46 50

a VSWR

the

50

results.

further

to

ARRL

Radio

form

of

requirements.

mates

RG-58/U

to a linear

relay,

heavy

to a cold

external

the

Model

EARIH WATER GROUND

Figure

Transmitter

ohm

unbalanced

load

is

of

transmitter

the

popular

g,q.~

transmission

information

the

"Radio

Antenna

Relay

IMPORTANT

lightning

which

will

connector

with

an

co-axial

Refer

to

eqUipment

copper

water

chassis

HT

-46

OR

COLD

PIPE

RG58/U-50~

3.

Typical

Interconnections

is

designed

transmission

preferred

2.5/1

for

can

with

di-pole

optimum

be

accom-

acceptable

or

lines

on

the

subject

Amateur's

Book" ,

both

Hand-

published

League.

protection

comply

located

RCA-type

cable

amplifier

should

with

local

on phono

or

equivalent

or

the

antenna

Figures 2 and 3 for

should

wire

pipe

or

ground

rear

chassis

be

bonded

braid

outside

terminal

apron

to

beam

will

of

rear con-

to-

and

earth

is

I

i

----1I--.:;;;-;:--

CALIBRATE

SIGNAL

PICKUP

LEAD

WHEN

REQUIRED

for Model

STANDARD 1/4-INCH

Figure

STANDARD 1/4-INCH

Figure

3-6.

front with a standard plug high phone

usually

especially

~

~ ~ ~ ~ ~ ~ m ~ ~

I, t UJ6

E

Xl

SPEAKER

1-"

HT-46

32

~

RG58/U-5DA

and

Model

2-,lJ

I 5 1

III

VAC

ANTENNA

SX·146.

COAXiAl

b

TIP

RING

:3

PHONE

4. Microphone Wiring for

0

c5

TIP

RING SLEEVE

PHONE

5.

Microphone

MICROPHONE.

The

microphone

panel.

wired

as

impedance

may

be

for

SLEEVE

CONDUCTOR

PLUG

:3

CONDUCTOR

PLUG

Control

The

microphone

1/4-inch,

shown

crystal

be

used,

achieved

voice

Wiring for

Unit

in

with a microphone

communications

3

LLk.~~J:l~~H

KEY

CONNECTION

(J:

DR

RS58tU

--

III

VAC

156-007044

-,

I

Bf

RElAY

d:

A

RS8tU

~-"'I"":;';:';;';";;;;";~---

RT

1-"

1-

1°

--

I

~C~O~

Push-

To-

Talk

Transmitter

--

I I

I

l.!:!!C~~

Transmitter

Model

receptacle

three

Figures 4 and

or

dynamic

however

HA-16.

cable

conductor

best

Control

is

located

should

results

--

~

5. Any good

type

use.

I

':'

-l

156-007026

Control.

I

G

I

-

-1

156·007027

with

VOX

on

the

be

fitted

phone

micro-

will

designed

- 5

The

microphone

may

also

be microphones mute

the

microphone pressed, Ie

ss

3-7.

hence

the

microphone

KEY.

The

station transmitter rear

chassis Refer two so which TROL with tion

to

Figure

conductor

that

the

is

at

OUTLET

Pins

NO.1

to

the

keyer.

used

fitted

VOX

at

the

apron

3. The

1/4-inch

key

base

ground

maybe

or

circuit

with

VOX

with

push-to-talk

element

operation

switch

keyer

may

closed

or

at

the

key

phone plug.

connects

potential.

used

NO. 8 used

shown

control,

in

Figure

however

switches

until

the

switch

is

not

possible

is

altered

be

circuit

accordingly.

connected

key

jack

CONTROL OUTLET.

jack

accepts a standard

Wire

the

to

the

plug

sleeve

NO.

90f

the CON-

to

key

the

transmitter

for

ground

connec-

some

also

un-

to

the

at

the

plug

is

4

Receiver

Keying

PTT

SPDT

Calibrate

3-10.

FUSE.

Specifications: 3 amperes,

muting:

circuit:

control

relay

signal

Pins

circuit:

contacts:

coupling:

NO.6

NO.9

Pins

AND

and

NO.

NO.3,

NO.

slow

and

NO.8

10

and

5

NO. 11

blOW, 3 AG

NO.

NO.4

8

type.

3-11.

ACCESSORY

INSTALLATION.

When

the

keyer

tune

circuit

up

in

the CW-TUNE

TION contro1.

When the OUTLET, jack

3-8.

insert a dummy

to

hold

the

SX-146

INJECT.

Transceive able

when a between Model SX-146

The INJECT SLAVE removing receiver venient should

75-ohm

the

Model

receiver.

cable

receptacle

OUTPUT

the

receptacle.

length to

be

made up RCA-type phono 75-ohm (NO. 21-597) microphone

3-9.

be

station

that

control

co-axial

CONTROL

The

required

wiring

the

following

outlet.

is

type

control

by the

Speaker

keyer

is

plugged into the KEY

must

be

position

keyer

is

wired

phone plug into the

circuit

type of

open

operation

co-axial

HT-46

is

connected

on

the

connector

82

ohm

dummy

The

cable reach of

plugs

cable

between

75-ohm

at

each

made

recommended.

cable

for

this

OUTLET.

outlet

circuitry

station

circuit

is

shown

facilities

muting:

Pins

NO.7 & NO.1.

jack

closed

into

for

of

the

SSB

the

or

CW

OPERA-

CONTROL

key

for

CW

operation.

is

made

avail-

cable

is

connected

transmitter

between

transmitter

on the

receiver load may

co-axial end.

Small

by

Amphenol

Do

not

and

the SX-146

and

plug

be

any

the

units

cable

diameter

use

shielded

the

after

in

con-

and

with

Corp

the

application.

mayor

may

not

installation. A typical

in

Figure

are

available

NO.2 & NO.8

3. Note at

the

and

1. 10 tional coverage. sary (Refer indicate

crystals

To

to

remove

to

paragraph

their

BAND

28.0

29.0

29.5

2.

VOX

Model HA-16

voice

control mitter. mitter

It

is

cabinet

A. sently on Save the

installed

the

rear

the

control

jumper

unit

B.

of

the

transmitter

about

1/8

inch

C. Hook

unit

into the two

wall

just

above the

notched

ground

flange between the

bolt.

D.

the

control

unit

is

now

ready

Meter install

location.

Band

will

be

the

the top

7-2).

FREQUENCY 32,000.000

33,000.000

Crystals:

required

crystals

portion

Chassis

The

crystals

for

full

it

will

of the

markings

required

KC

Three

10

be

NUMBER

019-201963

019-201965

33,500.000 KC 019-201966

Control Unit Model HA-16: The

adapter

operation

installed

as

Remove the

chassis

Loosen

unit

of

the

on the

follows:

in the

VOX

apron

plug

for

is

disconnected.

the

and

space

is

available

Model

rear

jumper

UNIT

of

it

must

ground

HT-46

of the

plug socket

the

transmitter.

be

bolt

the

flat

to

(PI)

replaced

at

apart.

the

Tighten

Plug

unit

into the

for

Model HA-16

key

holes

ground

the

ground

the

inter-connecting

VOX

adjustment

in

bolt

flat

the

and

washers

bolt

UNIT

and

VOX

rear

insert

nut.

socket.

operation.

addi-

meter

neces-

cabinet

will

are:

PART

provide

Trans-

trans-

pre-

located

the

rear

washers

control cabinet

the

of

the

cable

The

if

of

6 -

SECTION

IV

4-1.

TUN

ING

The quency of a

of

the

transmission

separate operating the

Model SX-146

this

control

mission

is

Note

to

right

for

the

calibration logged from

below

right

The

lowest

frequency

tuned.

4-2.

OPERATION

The OPERATION

switch

as

which

follows:

POSITION OFF

STBY

USB/LSB

(Two

CW-TUNE

CONTROL.

tuning

control

VFO to

when the

unit.

(VFO

the

transmitter

receiver

is

disabled

controlled

that

the

two

bands

marks.

these

marks,

to

left.

BAND

SELECTOR

of

CONTROL.

controls

positions)

FUNCTIONS

is

select

transmitter

switch

as a transceiver

(VFO

and

the

by

the

frequency

whose

numbers

For

the

band

control

the

mode

Removes from

Application

power

and

plate tubes in a stand-by transmitter

permits

cuits time.

In

these transmitter operation

band

mode color or

LSB

and

is SELECTOR ings.

This

transmitter

carrier ing

the

operation.

position,

may

also

operation.

used

to

vary

the

desired

at

XMTR.) When

switchatRCVR)

frequency

receiver.

increases

the

remaining

frequency

setting

or

band

segment

is a six

of

transmission

FUNCTION

all

primary

the

transmitter.

places

voltages

which

are condition. The control

the

receiver

to

function

two pOSitions

is

for

suppressed

of

transmission.

code

indicates

for

the

so

coded

panel

position

on

only

to

transmitter

In

the be

keyed

OF

the

frequency

is

used

of

trans-

from

appear

indicates

of

single

above bands

increases

being

position

power

primary

both

heater on the

biased

relay

at

placed

side-

carrier

band

in

on

the

BAND

mark-

places

the

air

permit

for

this

same

transmitter

for

OPERATING

fre-

as

with

left

the

off

cir-

this

the

in

The

USB

use

the with tun-

SSB

CW

4-3.

balanced audio

range level tions.

4-4.

tuned driver

The

mitter as a transceiver

4-5.

output transmitter tion.

switch level.

4-6.

rotary

crystals

shown

refer band

4-7.

capacitor

the

calibrated

the procedure.

4-8.

metered

idle

trol,

current

voltage

the

CONTROLS

STBY

MIC

GAIN.

This

control

modulator

amplifier

to

handle

microphone

DRIVER

The

circuits

control

CARRIER

The

is

BAND

The

switch

on to the

pOSitions on

FINAL

The

P A

capacitor

METER

The

1.

plate

and

2. At RFO,

output

TUNE.

DRIVER TUNE

stages

is

output when

CARRIER

level

for

tuning

control

set

at

SELECTOR.

BAND

which required the

dial.

TUNE.

FINAL TUNE

that

stage

in

band

SWITCH.

METER

circuits

At

MA

current

to

indicate

on

the

across

of

the

This position heater and

ceiver

sets

stage

stages.

any

high

deSigned

of

the

signal

driving

always

tuned

operating

with

the

LEVEL.

LEVEL

CW

process

also

ON to

control

SELECTOR

selects

to tune

The

color

USB/LSB

the

OPERATION

tunes

the

to

the

antenna

segments

near

resonance

switch

in

the

meter

when

final

40 to 300

the

50

transmitter.

is a second

which

and

again

circuits

the

audio

from

The

control

impedance

for

voice

control

frequency

the

final

for

as a transmitter

SX-146

control

operation

for

CW

functions

the

is

the

tuned

the

frequency

coded

coding

control

pi-network

load.

to

permit during

selects

transmitter.

is

setting

the BIAS ADJ.

amplifier

milliampere

meter

ohm

indicates

transmission

The

stand-by

retains

supply

permits

the

voltages

the

re-

to function.

level

to the

the

microphone

has

sufficient

high

or

low

communica-

resonates

mixer

amplifier

maximum

the

and

stage.

trans-

or

receiver.

sets

the

RF

and

during

or

SSB

when

calibrate

an

eight

circuits

the

opera-

the

CAL

signal

position

and

ranges

panel

markings

for

the

two

side

control.

drives a variable

used

to couple

The

control presetting the

tuning

either

used

to

of

read

two

the

con-

stage

plate

range.

the

RF

line

scale

is

cali-

is

at

- 7

brated to

up and

4-9.

in

indicate

operating

CALIBRATE

The carrier when

the

ing

in

the obtain level

the

may control ON

places

in

the

standby

ceiver

4-10.

in

VFO

This

operation

percent

transmitter

signal

CAL

be

if

the

of full

maximum

the

SWITCH.

for

switch

CW

mode,

calibrate

varied

desired.

the

control

position

receive

SWITCH.

two

position

scale

RF

power

transmitter.

provides a low

frequency

is

set

the

key

signal.)

with

the

Setting

relay

to

mode

switch

when a Model SX-146

and

the

output

spotting

at

ON. (When

must

The

CARRIER

the

in

place

to

pick

selects

receiver

meter

when tuning

level

purposes

be

closed

calibrate

CAL

switch

the

transmitter

the

station

up

the

serves

CW

operat-

signal

LEVEL

re-

signal.

mode

is

inter-

to

at

of

connected

is

operated

in

the

with

as a single

XMTR

interconnected,

together

or (VFO ceive

the

4-11.

panel

It

moves as between

as a transceiver

as

separate

switch

mode

at

the

transmitter

DIAL CALIBRATION.

This

is a small

directly

the

necessary,

the

dial

the

transmitter.

unit

position.

the

With

two

transmitter XMTR). When receiver

VFO tuning

frequency.

lever

below

dial

the

mechanism

to

zero

and

pointer.

center

out

If

the VFO

the

units

may

(VFO

and

operating

extending

of

to

any

calibration

the

transmitter

switch

SX-146

be

switch

receiver

also

through

the

dial

the

right

is

left receiver operated

at

RCVR)

units.

in

trans-

controls

window.

or

left,

error

the

5-1.

GENERAL.

The tuning transmitter should

be

exercised performance. formed on receiver tuned quency tuned, TUNE output. gained various when peaking. require in

on

or

all

bands.

(when

an

appreciable

at

which

it

will

and

(Meter

in

the

bands,

he

has

In

more

frequency

The output

be

connected

a

dummy

load

termination

5-2.

BIAS

ADJ.

procedure

is

not

complicated,

in

tuning to

Tuning (peaking)

near

the

intended

If

the

VFO

operating

amount

the

transmitter

be

necessary

FINAL TUNE

switch

at

operation

the

operator

tuned

general,

frequent

on

to

or

at

the

dial.

of

the

a 50

suitable

operating

far

the

retuning

ohm,

for

the

insure should

operating

dial

of

the

in

transceive

away

to

repeak

controls

RFO).

of

As

the

transmitter

will

be enough lower

frequency

for

transmitter

resistive

antenna

frequency.

TUNING

Model

however,

transmitter

from

was

for experience

to

the

having a

HT-46

optimum

be

frequency

mode)

the

previously

the DRIVER

maximum

able

to judge

require

same

must

always

load

such

50

SECTION

V

PROCEDURE

care per-

or

is

fre-

and

is

on

the

re-

bands

shift

as

ohm

into

wise on

the DRIVER TUNE obtain a meter

hold first RFO and mum stage stage

CARRIER

OPERA

MIC

TION

GAm

••••.••••••

DRIVER TUNE

CARRIER BAND FINAL METER CAL.

LEVEL

SELECTOR......

TUNE.

••..•.•.••••.••

• . • • • VFO • • • • • • TUNING DIAL

1.

Set

OPERATION close the

2.

the

KEY

Turn

keyer

jack.

CARRIER

until a small

meter.

On

setting

reading.

3.

an

tune

Adjust

RFO

the

then

the

meter

FINAL TUNE

adjust

RFO. Always

before

as

applying high

may

happen

LEVEL

•••••••••••••.••

•.••

Near

•••••

• • • .

Desired

••

• . • • . • • • • • • •

••

. • • . • • • • • • •

•••••

Desired

control

circuit

if a keyer

LEVEL

RFO

indication

some

bands

may

require

CARRIER

reading

near

control

the

DRIVER TUNE

resonate

the

drive

when

the

controls

are

STBY

MIN

(Full

CCW)

band

segment

MIN

(Full

CCW)

Desired

band

Set

segment at

.•

••

XMTR

band RFO

OFF

frequency

at

CW-TUNE

is

plugged

control

the

clock-

is

observed

preliminary

altering

LEVEL

mid

for

final

levels

control scale

maximum

for

maxi-

amplifier

to

DRIVER TUNE

adjusted.

to

and

the

or

Before

check

for

an

and

idle amperes. instructions

5-3.

BASIC

Pre-set

8 -

and while

if

necessary,

(no signal)

Refer

to

on

setting

TRANSMITTER

the following

operating set

the

plate

current

paragraph

the

BIAS ADJ.

TUNE-UP.

controls

BIAS ADJ.

the

8-3

as

transmitter

control

of 40

milli-

for

detailed control.

indicated:

5-4.

CW

OPERATION.

1.

paragraph key

jack,

tuning

for

transmitter

adjust level erating

the

required

into

Tune up

5-3.

When a

its

key

circuit

either

is

set

CARRIER

by

an

antenna

the

transmitter

keyer

must

CW

or

up

to

drive a linear

LEVEL

the

linear

load,

is

be

SSB

operation.

control amplifier.

advance

as

outlined plugged into closed

to

permit

If

amplifier,

for

the

drive

When

the

CARRIER

in

the

op-

LEVEL In DRIVER TUNE

either

control

case,

to

just

below

repeak

controls

the FINAL TUNE and

at

this

output.

the

following

2.

Saturated

manner.

drive

Start

level

clockwise CARRIER LEVEL slowly observing at an This LEVEL this

increase

the RFO

a point

where

appreciable

is

saturated

control

leve1.

3. The

reactivate

To control

5-5.

at

STBY.

PUSH-TO-TALK

1. Tune the

paragraph

meter to the

5-3

reading

linear

output when

2.

Return

MIN

and

set

or

LSB

position upper band

switch,

voice

until

mately mum

or

lower

in

the

amateur

3.

Depress

speak

level,

the RFO

one-half

output microphone be

less

critical of the AALC still

depends upon the type of operator's habits. into of

levels

voice

Sufficient microphone

the

Model HT-46 to handle the

associated

the

carrier

meter

further

increase

reading. Set the rotation

in the RFO

output. Back off the CARRIER

setting

and

transmitter

the

receiver,

SSB

OPERATION.

transmitter

and

paragraph

obtained

amplifier

operating

for

or

the

into an

the CARRIER

the OPERATION

desired.

side

The

band changes

bands.

the microphone

into the microphone in a

and advance the MIC

meter

during

gain

because

circuitry;

swings

the

meter

tune-up with

control

reading

setting

of the

however, the knob

characteristics,

with communications type

microphones.

saturated

level

for

is

determined

from

the full

control

output

does not meter

operate

is

set

Slightly below

now

ready

the OPERATION

as

5-4.

Note the RFO

maximum

maximum antenna

LEVEL

control

customary

from

push-to-talk

GAIN

upward

noted

carrier.

will be found to

compression

microphone, and

his

gain

has

usual

drive

leve1.

maximum

counter-

setting

level

while

control

cause

reading.

to key.

outlined

drive

level

saturated

load.

control

at

the

use

of the

band to

normal control

to

approxi-

at

maxi-

action

setting

operating

been

built

range

in

and

in

to

USB

The

the

1.

For

push-to-talkoperation,

VOX

selector

switch of the

PTT.

set

the

three

TRIP)

2. To PTT-

at

set

VOX

controls

their audio gain on the low level.

3. Use the tuning

paragraphs

mitter control set

the

at

VOX

5-3,

for

SSB on the selector

and

operation.

transmitter

set

follows:

A.

Advance the SENS. wise), the

speech.

for

while talking into the

VOX

relay

(Use no

best

results.)

B. Adjust the

desired

long enough to but quick

for ANTI-TRIP the

Excessive

established

control

drop-out

prevent

not long enough to

reply.

C.

Set

the

desired

sensitivity

received

signals

anti-trip

listening

system.

Some to-talk

microphones

control

in the switch to

element leased. feasible

when the push button

VOX

unless

connected within the microphone.

setthe

VOX

control

up the

VOX

selector

control

switch

at

unit,

PTT,

(SENS., DELAY, and ANTI-

full

CCW

pOSitions. Reduce the

station

5-4

receiver

procedure

and 5-5 to

to a

ready

outlined in

the

With the OPERATION

set

for

SSB

operation, switch on the the

accessory

VOX

unit

control controls

control

microphone,

closes

more

delay. The delay

the

listening

on the

VOX

DE

change-over

miss

receiver

level

control

do not

gain

level

actuate

or a major

may lock out the voice

NOTE

equipped

have

shorting

disable

first

syllable

gain than

LA Y

necessary

control

period

between

the

other

operator's

audio

gain

and advance the

(clockwise) until

the

VOX

increase

for

push-

contacts

the microphone

is

operation

this

will

circuitry

not

is

PTT-

unit

at

initially

and

set

relatively

trans-

unit

as

(clock-

until

of

for the

should be

words

control

relay.

in

the

re-

be

dis-

4.

will

return

5-6.

VOICE

The Model HT-46

control

unit Model HA-16

Releasing

the

CONTROLLED

the microphone switch button

station

to the

SSB

OPERATION.

transmitter

installed

with voice contro1. When the

installed

the follOwing

and the

operating

station

procedure

is

wired

receive

condition.

with the

will

accessory

per

will apply:

VOX

operate

unit

Figure

is 3,

5-7.

SX-146 in

Figure

rear

apron

set

at

transmitter

the

TRANSCEIVE

1. The Model HT receiver

3 to

2. The INT.

(SLAVE)

must

be

perform

the

OSC/EXT. OSC.

OPERATION.

-46 inter-connected

transceive

of the Model SX-146

INT. OSC. to supply the

for

transceive

transmitter

switchonthe

receiver

required

operation.

and Model

as

shown

function.

mustbe

signal

to

- 9

3,

Before operation their

lower few

remove and

proceed

follows:

TUNE and CARRiER transmitter controls reading

ence

can

carrier

sideband

cycles.

the

A.

B.

on

on the

between

C.

the

D.

exact

be

accomplished

oscillator

operation

To

synchronize

top

section

as

follows:

Set

the

RF

GAIN

AVC . . . . . . . . . • . . . . .

PRESELECTOR . Peak SELECTIVITY BAND

AF

GAIN • . . . .

CAL

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

ANL . . . . . . . . . • . . . .

OPERA

TUNING Set

the

OPERATION

MIC GAIN . . . • • . . . .

DRIVER TUNE CARRIER BAND FINAL TUNE METER CAL. VFO. TUNING DIAL . . .

Adjust

and

the

receiver

receiver.

On

some

the

receiver's

on

frequency

with the two

frequencies

must

be

the

of

the

receiver

SELECTOR

TION . . . . .

SELECTOR

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

. . . . . . . • . . . .

the

PRESELECTOR

units

controls

..........

from

..

DIAL

.......

transmitter

..••...

...

LEVEL......

.•.•

...........

DRIVER TUNE, FINAL

LEVEL

for

maximum

the

8998.7

transceive

for

matched

two

oscillators,

as

transmitter

2.1

or

operating)

....

..

As

..

controls

Peak

.......

Peak

..

Optional

operating)

controls

and tuning

"s"

frequency

KC

units,

upper

within

cabinet

follows: , MAX

..

on

signal

5.0

" 3.5

desired

OFF

..

OFF

Red

USB

3.8

Red

USB

..

MIN

on

signal

MIN

on

signal

Optional

..

RCVR

(non-

on

meter

differ-

detector

and

a

ON

(If

MC

as

3.5

ON

the

oscillator oscillator them units note control note pointer.

(C53) on watching for

the

not

reset transmitter, transmitter's

carrier

transmitter.

transmitter

(Red LSB) and (C60) on the

step matched transmission mode. be

repeated

desired,

as

outlined

control plished

mitter

for

units

and

respects

which

For tuning the bands frequencies.

and

may

can

only

may

be

in

the

receiver.

on the

or

maximum

E. the the

slowest

the

oscillator

F.

and

receiver

E.

The

exactly

The

procedure

only

4. With in

or

transceive

by

setting

at

XMTR

transceive

as a transceiver,

operating

except

is

now

this

reason

receiver

to

avoid

the

transmitter's

be

so

small

be

observed

separated

Adjust

transmitter

pulsation

Adjust receiver "S"

carrier

its

filter.

Set

transmitter

when

each

an

the

step

procedure controlled

the

meter

pointer

oscillators

See

adjustment

the

OPERATION

receiver

set

the

for

frequency

operated

time

occasional

receiver

3,

either

the

for

separate

control.

for

the

care

outside

transmitting

8998.7

that

the

on

the

"S"

enough to

the CARRIER

for

the

of

the "s"

8998.7

chassis

and

oscillation

oscillator

paragraph

to the

9001.5 KC BFO

chassis

outlined

transceive

operation

VFO

When

the

remain

by

should

KC

for

setting

are

procedure

opposite

for

and

receiver

in

check

BFO

separate

switch

control

operating

transmitter

tuning

the

be

the

American

frequency

matched

controls

zero

of

reception, the step 3 need

maybe

frequencies

may

unchanged

control receiver

exercised

on

KC

carrier

beat

between

meter,

hear a beat

loudest

BFO

zero

the

possible.

8-14

operation

on the

unauthorized

other

LEVEL

beat

meter

trimmer

beat

trimmer

of

the

to for for

on

side

band

trimmer

beat

as

are

now

and

transceive

required.

transmitter

be

accom-

trans-

or

at

RCVR

the

two

tune

in

function

tuning.

when

amateur

by

Do

the the the

the

in

not

is

set

up

all

6-1.

modulator sideband translate to is

the bands. the is

GENERAL.

The Model

followed generation. the

the

output

generated

20

meter

substituted

10

-

bands

heterodyne

For

"slave"

Model SX-146, the SX-146

HT-46

by

Signal

generation

frequency.

by

the

and

indirectly

crystal

or

for

the

transmitter's

utilizes

selective

Single

VFO

conversion

The

directly

oscillator

transceiver

frequency

heterodyning

by

pre-mixed

THEORY

the

solid

filter

principle

is

(9000 KC)

on

the

pre-mixing

for

the

remaining

operation

pre-mix

SECTION

OF

state

of

used

to

signal

80

and

with with

injection

stages

VI

OPERATION

and

the

carrier

units

band inal are of

by

are

receive

6-2.

9000 KC. The 8998.7 KC

and

SIDEBAND

The

signals

frequency

the

frequencies

the 6 pole

the

diode

oscillator

matched

transmit

GENERATION.

carriers

are

generated

of

8998.7 KC

crystal

modulator

within

frequency.

for

the

that

fall

filter

'carrier, CRI

frequencies

cycles

to

provide

upper

and

in

tube

V2B

and

9001.5KC.

25 DB down the

which

and

is

when

CR2

for

the two

equal

lower

side-

at a nom-

These skirts

centered

modulated

produce

at

an

TO

VOX

UNIT

HA-16

BAND

8998.7KC

80M

4QM

20M

15M LSB USB

10M

900I.SKC

USB LSB LSB

USB LSB

USB

LSB

= =

J 1

.1USB

BOM-5.5 4QM-16.0 20M-

15MtOM-

1---If------------1

XMTR~

SX-146

N

FREQUENCIES

ME

AS

FREQUENCV

SHOWN

FOR

ABOVE. SX-146

RCVR

V4

':"

INJECTION

5.5

30.5

37.0

TO

5.0MC

16.SMC

5.0MC

30.0MC

39.0MC

80M-3.5

4OM-7.0

20M-14.0 ISM-21.0 IOM-28.0 IOM-2B.5

:g==~~:g

33.SMC

32.SMC

33MC 32MC

TO

4.0

MC

TO

7.5

MC

TO

14.S

MC

TO

21.5

Me

TO

28.5

MC

TO

29.0

MC

+8

~61M~C

2SMC

21.SMC

Figure 6.

upper KC. ulated KC. The by

follower

adapter the GAIN

by V 4 the

6-3. HETERODYNE SIGNAL GENERATION.

to

signal

by Oscillator

taken Heterodyne amplifier dyne mixer and tuned 5 MC-5.5 80M range

the heterodyne

now power nal

sideband

Conversely,

produces a lower

modulator

the

two

triode

Model HA-16

first

audio

control. The 9000 KC

tube V3A

where operating

To

the

operating

tubes

the

translate

is

generated

V7

and

frequency.

(VFO)

- Mixer)

from

the

mixer

stage.

mixer

grid

tube

through

T4 on 40M, 15M

and

20M

in

of

the

VFO.

The

desired

9000 KC

information

CW

amplified

by

amplifier

is

coupled

suppressed

the

9001.5KCcarrierwhenmodis

stages

in

tube V2. Audio

amplifier

sideband

coupled

information

the

carrier

sideband

driven

of

tube

is

taken

stage

to

the

signal

9000 KC

signal

at

audio

V1

and

from ahead

signal

is

information

frequency, a heterodyne

either and

or

Model SX-146

tube V8B

The

(V8B)

bandpass and

MC

tuned

order

mixer

signal

the

stage

to

the

within the

V8

(Heterodyne

for

"slave"

receiver

working

plate

circuit

is

coupled

transformers

10M

and

circuit

to

accommodate

product signal

at

the

signal

driver

stage tube V6. The antenna

operation

of

through a broadly

L25

resulting

and

tube

amplified

transmission

signal

mixer

Block

Diagram of Model HT-46

at

frequency

the

cathode

for

the

plate

of

the

is

amplified

mixer

translated

signal

frequency

transmitter

Crystal

through

as

an

the

hetero-

to

the

signal

T2, T3

and

R58 on

the

tuning

from

the

tunable

grid

V5

and

9000 9000

VOX

of

MIC

tube

to

it

is the RF

is the

sig-

line

Transmitter.

with a pi-network

load

the

final

load

is

connected driver the

two

stage

section TUNE). The input

side

by

6-4. AALC (AMPLIFIED AUTOMATIC

LEVEL

To

protect cessive an

system manner. developed age fier grid

dition.

below

triode

"flat-topping"

Amplified

is

placed

When a

in

at

audio

grid

bias

current

This grid section

CR3 and CR4. The fed

to

the

grid

tube

V3A

as

6-5.

METER

The

metering

transmitter

means

current

the

minals the

of

RF

final

of the voltage

of

determining

the

and

that

amplifier

to

the

coils

are

capacitor

final

stage

capacitor

CONTROL).

the

Automatic

in

small

the

final

frequency

line

in

developed

audio

signal,

current

of tube V3B return

a gain

CIRCUIT.

are

designed

final

control

amplifier

appearing

transmitter

driving

is

pre-adjusted

tube when a

transmitter.

gang

tuned

C40A

pi-network

C67 (FINAL TUNE).

final

amplifier

during

SSB

Level

operation

amount

stage, a small

is

developed

proportion

by the

which

levels,

is

and

resulting

DC

of the 9000

grid

circuits

the

to

idle

of

provide

and

tube

across

for

stages.

to

50

ohm

The

mixer

on

each

and

C40B (DRIVER

is

tuned

stage

transmissions Control in

the following

of

grid

current

ripple

on the

to

the

amount

over

driven

is

not

present

amplified

rectified

by

voltage

KC

IF

amulifier

bias.

the

Model HT

an

accurate operating and

to

the

output

optimum

tuning

156-006856

properly

antenna

and

band

by

on

the

from

ex-

(AALC)

is

volt-

ampli-

of

con-

at by the diodes

is

then

•

-46

plate

monitor

ter-

of

-11

Since

most

milliameter leaves the is at a zero milliampere point to the

much to be

scale, a bridge

used

in the HT

meter

calibration

of

the

meter.

higher

meter

than circuit

desired

circuit

-46

which

current

When the final tube

40

milliamperes

automatically

to swing up accordingly.

The METER switch between the surements RF

voltage

RF

voltage divided down by which can be handled The

resulting

DC

milliameter

bridge

circuit

and the diode load

at

the output

at

the output of the

resistors

by

DC

voltage

on a

percentage

purposes.

6-6.

VOX

ACCESSORY

The

VOX

accessory

item

Model HT-46

transmitter

CIRCUIT.

Control Unit Model HA-16

which will add voice control

calibration in the

first

accuracy

third

(R40, R41, R43 and R44)

sets

idle

plate

current

condition, hence the 40

mark

appears

S4

transfers

for

circuit

of

the

plate

at

the index

is

of

plate

current,

causes

the

current

for

measuring

transmitter.

driven

meter

mea-

transmitter

R46 and R47 to a

the

rectifier

is

then

metered

basis

level

diode CR5.

by the

for

tuning

is

tothe

for

ssa operation.

of

The

is

an

The

VOX

adapter

cuit

wiring

from

the

Model HT-46 through the UNIT connector on the samples

the signal with

samples

receiver

microphone would

placing the

setting the controls, may controlling the

the

phone the balance the from transmitter

audio

the audio signal

and

amplifies

Normally the

transmitter

VOX

the two

be matched

transmitter

When the

transmitter

the

receiver

on.

from

the

tubes

speaker

cause

sensitivity signal

so

that relay off the

operator

is

upset. The audio

overcomes

and the control

To avoid having the control and off between ing, a delay control R411 and

lapse

between the

over

from

words

circuit

transmit

capacitor

last

to

takes

its

power and

cir-

VOX

transmitter.

transmitter

V401A and V402A. It

at

this

signal with tube V403.

the

The

VOX

and

amplifies

speaker

of

unit

also

the

output picked up by the

the control

on the

and ANTI-TRIP levels the

rectified

air,

but by

in the

relay

VOX DC

to

close,

properly

gain

circuit

voltages

tube V401B cancel and hold

air.

speaks

while the

into the

the

anti-trip

relay

operator

signal

relay

micro-

from

signal

turns

the

switch on

is

talk-

consisting of the DELAY

C405

sets

the

time spoken word and the change receive.

7-1.

SERVICE

For

or

servicing

whom

it

Company

Authorized

service

at

no

charge service chase

by within the to

present warranty warranty,

charge. ters

display the sign shown below.

nearest

telephone

OR

OPERATING

further

was maintains

will be

center

the

terms

the

status.

repairs

All

information

of

this

unit, contact the

purchased.

an extensive

Service

Centers

performed

if

this

equipment

within

original

bill

of the

of

90 buyer

Warranty.

sale

After the expiration of the

will

Hallicrafters

you, consult your

directory.

QUESTIONS.

regarding

The

where

promptly

is

delivered

days

from

and the defect

It

in

order

be

made

authorized

dealer

SECTION

SERVICE

operation

dealer

Hallicrafters

any

and efficiently

date of

is

to

for

service

For

or

from

system

of

required

to the

purfalls

necessary

establish

a nominal

cen-

the one

your

local

VII

DATA

Make no

unless

crafters for

instructed

Company will

unauthorized

The

privilege

and

of making

assumes

revisions

7-2.

CABINET

Access

most

adjustments

top portion of the cabinet only. This

removing

of the

cover

The bottom removed moved. To

the

set

upside down. Remove seven

screws

and

service

to do

shipments.

Hallicrafters

revisions

no obligation to

in

earlier

REMOVAL.

to tubes,

may

three

Phillips

and lifting the

portion

only

after

remove lift

bottom

shipments to the

so

by

letter,

not

accept

Company

in

current

incorporate

models.

dial

lamps,

be had by removing the type

screws

cover

straight

of

the cabinet

the top portion

the bottom

cover

clear.

factory

as

the

Halli-

responsibility

reserves

the

production

such

crystals

is

on each

and

done by

side

up.

may

be

has

been

re-

unit,

turn

Phillips

type

12

-

7-3.

DIAL

Remove the cabinet top

paragraph

sequence in sion

of

1/4-inch

CORD

RESTRINGING.

7-2). Follow the

Figure

7. Maintain a

to

1/2-inch

cover

arrow

on the

(refer

and

spring

dial

to

lettered

expan-

cord

H

E

3112 TURNS

spring.

place

cord be two adjusted, dial

After

the

with the

adjusted

extremes

apply a

cord

completing the

pointer

on the

pointer

to

just

of

its

drop

and the

pointer

miss

place.

7-4.

TROUBLE

In

sideration at

an

absolute electronic problems and

replacement devices of

this

which

nature corrected. a

more

obscure

the

SHOOTING.

design

was

of

given to keep maintenance

minimum.

eqUipment, maintenance and

are

generally

of

may

become

are

However,

malfunction

event, only thoroughly

Figure

rail

clips.

the nylon

travel.

of

stringing

and engage the

The

After

rubber

operation,

pointer

pulleys

the

pointer

cement

clip to hold the

this

transmitter,

As

in

all

well-designed

confined to the checking

tubes

and

semi-conductor

defective. Malfunctions

usually

it

trained

is

entirely

easily

isolated

possible

may

arise.

technical

personnel

VFO

CAPACITOR

MAXIMUM CAPACITY

7.

Dial Cord

dial

should

at

the

is

to

the

clip

in

full

con-

problems

repair

and

that

In

this

THIS STRING SEGMENT LI

ON

PULLEY I N FRONT

STRING SEGMENT C-B.

AT

USE

50

POUND

EQUIVALENT.

attempt

to

Restringing

should

OR

Diagram.

plexity.

A

recommended Model HT-46 receiver check

on HT-46. A receiver, oscillator determine from

the

If

a malfunction

particular

should

other A

be

modes

careful

transmitter

which

the

various lead when tube

the

presence

stage

in question.

band

checked on

of

operation

study of the block

will give a quick clue

checked. The voltage

(Figures (Figures

correcting

10 and 11) and

14 and 15) will

a malfunction.

ES

OF

TEST

service

can

be oscillator

DACRON

equipment

aid

to trouble shooting the

is a general

used

CORD

to

provide

circuits

156-007041

of

this

coverage

a quick

within the

connected to the antenna of

placed

in

and/or

the

occurs

as

in

the

circuit

or

when

mode of

all

other

to

isolate

to which

chart

and

schematic

also

proximity

of the

to be checked, can

absence of a

operating

operation,

on one

the unit

bands and

the difficulty.

diagram

tubes

(Figure

should be

resistance

diagrams

aid

in

isolating

com-

this

signal

in

all

6)

chart

and

B

8-1.

GENERAL.

The Model HT accurately and, with ment replacement may

require

aligned and

normal

for

extended periOds of

of a

subsequent circumstances unless definitely

the malfunction

traced

usage,

major

should

to

-46

Transmitter

calibrated

will not

component

alignment,

realignment

has

been

mis-alignment.

SECTION

ALIGNMENT

has

been

at

the

factory

require

time.

realign-

Service

or

circuit

but

under

be

attempted

analyzed

Alignment

or

no

and

VIII

PROCEDURE

should only be

in

this

field, using

Do operation

understood

is

available.

the top and bottom views of the

mitter, ments.

not

for

performed

make

by

the

proper

NOTE

adjustments

of the

transmitter

and adequate

Refer

the

to

location

persons

test

equipment.

unless

test

eqUipment

figures

of

all

experienced

the

is

fully

8 and 9,

trans-

adjust-

-

13

L7

L5

L4

L10

--+--==::~::iii~-t~

V6

6HF5-

CI04

CI03

V9

OA2

14 -

T5

CI02

L26

LI

RI3

TI

CI7

Figu

re

8.

Model HT·46, Top View.

T2 T3 T4

CI4

L23

L3

)'8

Y7

D5-1

c-1..!----

Y6

-!-!-_--Y5

-!-!-_--Y4

~!----Y3

V7

-6BA6

_ V3

:L--!-;---

6EA8

...!-~---C82

-4-5----

L24

---rr----

L2

C83

D5-2

FL-I

MI

CI3

156· 0069596

8-2.

Model 606A

EQUIPMENT

1.

RF

Signal

or

REQUIRED.

Generator;

an equivalent having up to one volt output 70

ohms

or

less

and a frequency

2. A Vacuum Tube Hewlett-Packard having

an

RF

3. A dummy load; rated

at

100

The

load

may

totaling 100

4. AF Signal Model 200 AB,

Mode1410B,

probe

watts.

good to

Bird

be made up of

watts

dissipation.

Generator;

or

equivalent.

40

50

Wattmeter

Hewlett-Packard

signal

at

an impedance of range

Voltmeter

or

equivalent VTVM

generator to 40

(VTVM);

MC.

ohms

non-reactive, or

equivalent.

carbon

resistors

Hewlett-Packard

MC.

the

carrier

and

repeat

The idle or

transmission

and after plate plate turning on the

setting

lined

8-4.

CARRIER

balance

the

bias

plate

60

milliamperes

it

will

return

a cooling off current current

the

BIAS

above.

BALANCE.

adjustment

NOTE

current

may

after

period.

to

This

40

period. A rising may indicate was

set

up too soon

transmitter;

ADJ.

control

per

paragraph

procedure.

rise

to

50

an

extended

is

normal

milliamperes

that

the idle

after

correct

as

by

out-

8-4

5.

AF

Voltmeter; Ballentine Model 300

equivalent, capable

level.

6. A

coverage

8-3.

BIAS

The final

any

extensive Properly operating

amplifier

final ADJ.

control

general

reeeiver'

ADJUSTMENT.

amplifier

checks setting plate

dissipation

and

located

follows:

1.

Set

the OPERATION allow up. Note of at

switch

and

its

MA

the

at

least that

normal

and set

at

MIC

ten

the

meter

rest

position

returns

RFO. Set the METER switch

GAIN

2. Set the OPERATION

the

two USB/LSB switch set Release meter anical

place

that on the

to

place

the

BIAS

the microphone switch and note

pointer

stop.

the

transmitter

the

jumper

rear

If

the

has

been

switch

3.

Set

the

microphone switch. The

remain

at

rest.

positions,

the

ADJ.

swings to the

If

the microphone switch does not

plug

chassis

VOX

Control Unit Model HA-16

installed.

at

PTT.

the METER switch

If

of

measuring 1 to 5 millivolt

coverage

With

are

the

bias

driver

on the

100

bias

made on

or

KC

crystal

must

will

for

stages.

rear

amateur

calibrator.

be

set

the

transmitter.

insure

the

tubes

Adjust the

chassis

contro1atSTBYand

minutes

for

pointer

the

unit

swings to the

with the METER switch

to

its

rest

position

control

full CCW.

control

press

the microphone transmitter control

in

is

in

the

in

for

40

left

against

operation

VOX

UNIT connector

operation, milliamperes.

its

check to

apron.

NOTE

Set the PTT-VOX

at

RFO and

it

indicates

meter

pointer

RF

output,

band

before

normal

in the

BIAS

apron

to

warm

left

with the

at

MA

at

one of

and

that

the

mech-

see

press

should

reset

or

as

Adjust the

carrier

balance

follows:

1. The

reach carrier cover graph right antenna

operating

balance

from

7-2.

side

load, tune the unit

(Refer to

2. clockwise to stage. of switch

With the OPERATION

the USB/LSB

and

(capacitor

mum

RFO voltage.

an

antenna mitter, Release

the

the microphone switch.

transmitter

temperature

adjustments.

the

transmitter

With the

chassis

should

before

Remove the cabinet

as

resting

up, and connected to a dummy

for

paragraph

Turn

remove

the

5-5.)

MIC

GAIN

all

control

audio

from

control

positions,

adjust

the CARRIER BALANCE

C17 and

potentiometer

(Meter

or

dummy

meter

will

close

switch

load

connected to the

drop

to

zero

3. Disconnect the antenna

close

the microphone switch and adjustment. will

be

Take

care the

system

4. A

by

tuning a

transmitter

ANCE

then

and

The

meter

more

sensitive not to feed with the load

more

receiver,

will

still

with the load

excessive

removed.

exacting balance can

having an "S"

frequency. Adjust the CARRIER BAL-

controls

for

minimum

switch the OPERATION opposite sideband and check the ing.

If

it

increased, switching between carrier readings. sharp, slightly

frequencies

If

it

may

since approximately

USB

the

selectivity

be

necessary

the two

2.8

KC

touch up the

and

LSB

produce

of

to

carrier

apart.

retune

controls

be

allowed to

making the

described

in

on the

load

SSB

operation.

fully

counter-

the modulator

set

at

the microphone

controls

R13)

for

at

RFO.) With

near

the nUll.

load

and again

repeat

the balance

drop to

zero,

removed.

carrier

through

be

obtained

meter,

"S"

meter

reading

control

"S"

meter

balance

until

controls,

both sideband

equal "S"

the

receiver

the

receiver

oscillators

as

paratable,

or

either

mini-

trans-

but

to the

read-

meter

is

are

-

15

R65 R66 R68 CR7

THRU

CRI4

CR5

CRG

RG7

CI05

CI9

RI3

R72

CIO

Y2

CI2

YI

FI

J2

R70-----r-

J5-----

R71

J4

------''II

J3------''1l

S2H

LII

S2G

S2F

L9

L10

Ll3L12

S2E

L6

S2D

S2C

L23

S28 S2A

Figure 9. Moclel HT-46,

Bottom

View.

16

-

156-0069608

8-5. FINAL AMPLIFIER NEUTRALIZATION.

1.

Neutralization HT-46 place) transmitter described

CARRIER (approximately

voltmeter

FINAL TUNE serve

maximum. amplifier checked bands

check tralization, neutralizing for ing until maximum and and not final bottom

transmitter and

connected

at

in

paragraphs

LEVEL

is

not

control

the

plate

If

both

is

neutralized.

on 15M, 20M, 40M

and

tuning up

2.

Neutralizing

outlined

remove

capacitor

the

neutralization

capacitor

the

C62

plate

coincide

remain

29,700 KC

have

amplifier

to

plate

in

band

be

compartment

must

in

2S,750 KC

control

50%

available).

current

occur

above

in

current

close

in

place be

HIGH VOLTAGE

ADJUSTMENT SCREW

TRALIZING CAPACITOR TINGS EXCEPT

When heterodyne for the the

carried tralization KC this

8-6. VFO MECHANICAL INDEX.

With

panel the

slot,

dial

engage

8-7. VFO CALIBRATION ALIGNMENT.

The

calibrated The

VFO

coverage

OF

OFF.

neutralization

the

2S.0

10

meter

neutralization

out

and

21,500 KC

band.

the

pointer

should

the

be

nylon

frequency portion

frequency

receiver

THE O:PERATION CONTROL

crystal

and

on

should

dial

equal

pulleys

of

or

check.

its

cabinet

to a dummy

in

the

5-3

and

for

50

on

the

RFO

Carefully

through

dip

at

the

resonance

and

same

Neutralization

and

SOM

at

the

same

VFO

the

Model

indicates a need

the

check

at

cabinet

C62.

1/2

the

Proceed

and

turn

dip

center

cover

adjust

or

and

agreement

edges.

for

The

the

cabinet

test,

cover

in

place.

CAUTION

APPEARS

OF

AT

NOTE

is

required

oscillator

29.5

band

segments

band

are

not

procedure

the

15

meter

be

checked

for

equal

reset

lever

over

travel

and

the

pointer

at

the

extremes

range

the

may

the

dial,

be

VFO

of

the

is

5.0

picked

frequency

With

(all

load, CW

5-4.

volts

meter

output

by

HT-46.

1/4 output

of

the

at

the

and

ON THE

THE

ALL

crystals

available,

band.

at

run

centered

at

VFO, MC

up

the

Model

hardware

mode

Adjust

RMS

if

tune

output an

and

in

the

as

the

RF

the

ob-

voltage

setting,

may

the

be

switching

dial

setting.

If

the

for

neu-

to

adjust

as

the

outlined

neutraliz-

turn

steps

voltage

10M

band

2S,000 KC

cover

does

however

the

cabinet

NEU-

SET-

and

the

of

may

be

Neu-

21,000

out

on

in

its

each

end

of

should

not

oftravel.

over

the

to

5.5 MC.

on a general

may

be

translated mitter on

an ceiver calibrator 100 KC

capacity bration check pointer lever.

of

its

VFO

CW

mode switch RIER Signal band

tuned

receiver CS2 in

the

KC

check

than

acceptable exceeds

dial

coil

to

the

SOM

in

CW

mode,

amateur

should

to

point

1.

Trimmer

correction

check

points,

and

cannot

Recalibrate

A.

and

band

coverage

have

an

check

the

across

adjustment is

across

consistently

be

the

Set

the

slot.

B.

Set

the

frequency)

and

(OPERATION

at

XMTR)

LEVEL

will

be

on

control

present

the

receiver.

C. With a

to

for

5500 KC,

tuned zero

or

to

3500 KC,

beat

with

receiver.

D.

Check

pOints.

approximately

limits.

3 KC

at

If

the

3 KC,

If

the

(VFO = 5000 KC),

adjustment

in

addition

band

accurate

the

indicated

the

corrected

VFO

dial

tune

control

set

to

general

an

across

the

high

ment.

2. check for as

carried

both

follows:

5000 KC), and

adjust

calibrator

Trimmer

out

trimmer

A.

tune

eoil

in

the

B.

in

and

Set

the

up

in

L24

for

receiver.

Repeat

and step

coil

dial

CW

zero

the

3500 KC (VFO = 5500 KC) at

4000 KC (VFO = 5000 KC)

settings

dial is within of with citor C 83 should personnel,

at

less

acceptable

one

the

not

are

exactly

C.

Check

the

100 KC pOints.

than

one

pointer

end

width

limits

should

be

attempted

thoroughly

on

the

pointer

limits.

on

be

familiar

frequency.

at frequency,

by

operating

the

SOM

signal

receiver.

100 KC

dial

calibration

dial

of

the

transmitter.

only. A

if

the

dial,

at

the

falls

to one

by

the

as

follows:

reset

lever

at

3500 KC (5500 KC

up

the

transmitter

at

CW-TUNE, VFO

SOM

band. With

full CCW enough

be

heard

in

the

coverage

amateur

the

frequency

the

error

band

adjust

VFO

100 KC

the

dial

error

calibration

increases

frequency

the

VFO

will

to

the

trimmer

coil

adjustments.

D above

indicates a need

adjustment,

at

4000 KC (VFO =

mode

on

the

beat

with

trimmer and

the

until

coil

adjustment

the

calibration

If

the

frequency

width,

If

the

any

the

error

of

the

calibration

the

"knifed" . This

by

other

with

than

the

trans-

picked

The

re-

crystal

at

every

trimmer

dial

cali-

100 KC

side

of

the

dial

reset

the

center

the

CAR-

SOM

amateur

receiver

coverage

trimmer

calibrator

at

the

100

is

less

is

within

and

end

of

the

require

adjust-

If

proceed

SOM

band

the

100 KC

adjustment

two

dial

across

error

is

in

excess

mid

points,

VFO

capa-

operation

qualified

technique.

up

in

a

the

at

the

is

-

17

8-8.

HETERODYNE ALIGNMENT.

check and used

Bsfore

the

chassis.

to

changing the

injection

The following

check

and

oscillator.

1.

Remove

the

VFO

injection.

2.

Set

the

TUNE, CAL

switch

XMTR.

Connect

3.

(Pin

2)

of

heterodyne

B)

and

through tion

voltages

are

as

ground

4.

follows:

Rotate

all

positions

clip

obtained.

3.5

7.0

14.0

21.0

*2B.0

2B.5

*29.0 *29.5

These voltage

not

5.

SELECTOR

segment added of

set

coil injection resonance.

been

If

adjustment

control

of

the

L23

for

voltage

Switch

bands

if

plugged

10M.

band

injection. A small the

injection

pattern

tube V7.

8-9.

HETERODYNE TRANSFORMER

Adjustment

not

VFO

on

be

is

alignment.

for

these

T4 should

voltage

when

or quire are

varies

the

transformers

complete

not

used

adjustment

18

-

CRYSTAL

OSCILLATOR

core

voltage

between procedure

adjust

the

the VFO tube

OPERATION

at

OFF

the

VTVM

mixer

to

chassis.

the

BAND

and

note

Normal

Zero

0.9V to Zero

0.6V to O.BV

O.BV

to 1.0V to

0.9V

0.6V to 0.9V

O.BV to

*NOTE

will

have

crystals

at

29.5, the

(If

crystal

Y3,

into

the

is

required,

selector

approximately

on

the

gentle

through

the

touch up on

shown in

MIXER

BAND-PASS

ALIGNMENT.

of

transformers

attempted

more

tuned

have

than

across

been

Bandpass

the

BOM

and 20M

bands

is

setting

of

coil

test

should

heterodyne

V7

to

control

and VFO

probe

tube

VBB

switch

to

(Test

SELECTOR

the

RMS AC

injection

1.4V

1.1V

zero

Y4

and

voltages

injection

Y6

have

transmitter.

set

the

highestfrequency

Y6

has

not

at

2B.5.)

90%

Adjust

of

maximum

slope

bands

the

step

core

4.

Replace

and

will

T2,

unless

30%

at

the

injection

test

amateur

replaced

transformers

bands

required.

L23,

point

crystal

disable

at

CW-

the

grid

point

control

injec-

BAND

been

core

side

check

yield

VFO

T3 and

point

band

and

re-

and

B

be

at

of

C

no

1. To justments or

T4

on

proceed

A.

CCW, VFO

and

set

switch

OPERATION

B.

tube

V4

(test

chassis.

C.

check and former former be

installed aligned

transformer

2B.0, 2B.5, 29.0

T4.

T4

over

necessary

and

per

paragraph

D. Tune the VFO

band

and

observe

If

the

variation

is

OK.

In

general,

40M, 20M,

and

RMS

run

between

(No 9

and

0.5V RMS. The 10M band

MC

signal

E.

over

the

band

the the

cores tion

that

lowest

band

and

increases

in

injection

pass

very

degree

approximately

age.

Again tune evaluate touching until the

segments ment injection

the

band.

rather

the the

injection

is

across

band.

2.

If

major

transformer of a signal mended. with the

Alignment use

A. Connect SX-146 the

INJECT

transmitter.

B. of

tube

V4

chassis.

check

the

bandpass

as

follows:

Set

CARRIER

injection

at

XMTR, CAL

control

Connect

point

Set

C)

BAND SELECTOR

T2; 21.0

and

For

this

method

the

complete

to

have

the

heterodyne

B-B.

the

variation

is

less

the

15M

bands

0.7V RMS to injection

If

the

difference

exceeds

voltage.

response

small

variation cores

of

the

1/2

the

injection the

increments,

rotation.

variation VFO

in

again.

voltage

On

the

10M

required

than

just

to

looking

only one

a new

transformer

adjustment

generator

of

the

of a signal

the

connector

Connect

(test

point

or

make

transformers

LEVEL

switch

at

CW-TUNE.

VTVM

and

probe

ground

for

transformer

29.5 to of checking

10M

crystals

Y3,

crystal

across

in

injection

than

30%

the

injection

slightly

will

voltage

run

over

present).

in

injection

30%,

set

the

To

avoid

completely,

noting

Adjust

voltage

in

injection

across

injection

Repeat

level

voltage

the

is

uniform

band a check

evaluate a core

at

the

segment

is

required,

for

alignment

bandpass

generator

the

C)

signal

and

at

the

VTVM

ground

generator

rear

probe

minor

T2, T3

control

at

OFF

to

clip

to

at

7.0

check

transtrans-

band

it

Y4

and

oscillator

the

amateur

voltage.

transformer

on BOM,

between

0.3V

injection

1.0V RMS

voltage

VFO

dial

upsetting

move

the

direc-

only

the

core

and

set

it

volt-

the

band

before

procedure

across

on

all adjust-

variation

of

the

installed

the

is

recom-

transformer

is

as

follows:

to

apron

to

clip

to

ad-

full

1 of

the

to

T3;

will

Y6

will

for the

for

and

four

in

10M

or

use

the

of

the

a

1

C.

switch

at

OFF, ERATION SELECTOR transformer T3

and

2S.5

D. erator Signal C.

frequency

generator

(Approximately

E. cores uniform cified. produce the the which

for

A

pass

tuning

are

response

equal

band

calibration average mixer crystal is

recommended.

to

grid

marker

BAND

7.0

21.0 2S.5

Set

the

CARRIER

control

for

to

band

be

T4.)

at

aligned.

Refer

versus

output

0.25V

Adjust

maximum

across

correctly

voltage and

equal

ranges

slightly

of

insure

over

the

of

over

Signal

uniform

the

check

TRANSFORMER

VFO

switch

LEVEL

CW-TUNE,

associated

to

the

band

for

to

0.5V RMS.)

primary

voltage

the

adjusted

at

the

at full and

with

(7.0

for

table

for

in

use

1 V RMS

and

at

test

frequency

transformer

frequency

amplitude

transformers

coupled.

generators

The

must

injection

entire

on

the

generator

band.

The

GENERATOR

FREQ.RANGE

T2 T3

16.0

30.0

T4 37.0

RCVR, CAL

CCW,

OP-

set

BAND

bandpass

T2,

21.0

for

Signal

at

and

test

gen-

adjust

point

secondary

point C and

range

spe-

will

limits

peaks

T2

within

and

T4

frequency

be

above

to

the

6AH6

use

of

frequency

to

16.5

MC

to

30.5

MC

to

39.0 MC

of

a

1.

ANTENNA

CW

- TUNE

set

full

CCW

2.

citor

C40

mately

VFO

control segment

1/2

dial

at

on

3.

and

adjust

ance

in

the output across meter

Signal

the

reading)

4. maximum are

common therefore, higher

frequency

5.

without

TUNE L13

changing

controls,

for

maximum

band.

Connect a 50

jack.

Set

with

the

(Minimum

If

the

trimmer

has

not

been

turn

from

Set

the

BAND

at

3500 KC,

the

left

hand

the

panel.

Advance

the

SO

the

FINAL TUNE

meter

level

50

ohm

load

as

the

Adjust

output

they

to

cores

meter

the

must

bands

Set

the

BAND the adjust

output

ohm

dummy

the

OPERATION

CARRIER

output).

on

the

pre-set,

tight.

SELECTOR

and

index

edge

of

CARRIER

control

band

segment.

of

approximately (approximately

alignment

of

coils

reading.

remaining

be

in

alignment

can

be

SELECTOR

setting

the

of

the

cores

at

7000 KC

load

control

LEVEL

driver

set

tune

it

approxi-

at

the

DRIVER TUNE

the

SO

meter

LEVEL

for

Maintain

50V RMS

50%

progresses.

L4

and

The

SOM

bands

circuitry,

before

aligned.

at

VFO

or

DRIVER

of

coils

on

to

control

capa-

3.5, band

control

reson-

RFO

L9

coils

7.0 LS

the

40M

the

at

the

an

for

the

and and

8-10.

nect clip

CARRIER

ALIGNMENT.

1.

the

to

OSCILLATOR

Before

VTVM

chassis. TUNE, CARRIER at

OFF, oscillator normal. for both

and

Close

equal

sideband

VFO

output

the

carrier

positions

trol.

2.

If

adjustment

of

transformer

of

the

maximum

for

the setting, the

transformer

8-11.

TRANSMITTER ALIGNMENT.

The properly operation assumed of

the

transmitter

the

internally

the

mixer

with

the

ment

covers

high that

set

that

bottom

frequency

is,

final

per

of

the

generated

and

driver

in

T1

amplifier

cover place.

TRANSFORMER

adjusting

probe

Set

OPERATION

LEVEL

switch

voltage

transformer

to

test

full CCW, CAL

at

of

microphone

oscillator

of

the

is

required,

for

approximately

voltage

obtained.

side

turn

the

core

winding.

MIXER

AND

bias

paragraph

S-3

transmitter

9000 KC Signal

are

functioning

Signal stages and

are

final

point A and

control

XMTR. A

1. 7V

to

2.0V RMS

switch

output

voltages

OPERATION

set

Adjust

of

the

to

back

DRIVER

STAGE

adjustment

before

is

attempted.

generating

properly.

of

the

transmitter,

aligned

amplifier

T1,

con-

ground

at

CW-

switch

carrier

and

check

con-

the

core

SO

to

90%

the

core

peak

core

it

out

must

extensive

It

stages

Using

as

follows

compart-

is

for

of

be

is

6.

the

FINAL TUNE

for

maximum maximum control tracking stages.

7.

core

adjustment

band

at

40M

band

S.

coils

L7

and

L10

TUNE

control segment the

appropriate

Band

3.5

7.0

14.0 2S.0

9.

are

adjusted

have

been

not

require

15

meters,

ing

an

iron

Set

the

VFO

output.

output

for

while

maximum

possible

After

setting

for

3500 KC

at

and

7000 KC.

Proceed

and

L12

on

the

10M band,

at

in

turn.

data.

Final

Tune

Segment

SO 40 20 10

The

15

only

aligned.

re-adjustment.

tune

up

COre

and

dial

and

DRIVER TUNE

Adjust

tuning output

between

the

coils

for

with

on

the

left

Refer

Adjust

Coils

14000

2S000

meter

after

the

Normally,

at

21,000 KC

brass

at

the

trimmer,

L4

coils

the

core

20M

indexing

band

to

the

at

3500 7000

band

10 To core

7400 KC

and

trimmer

the

DRIVER TUNE

to

obtain

mixer

and

repeat

and

L9

on

LS

and

L13

adjustment

band

and

the

edge

of

each

tuning

Adjust

Max.

L4, LS, L13 L7, L5,

coils

L6

meter

these

check

and

wand

band

coils

alignment

by

alternately

adjust

controls

C40C

for

the

best

driver

the

SOM

on

the

coils

L5

DRIVER

band

chart

for

Coils

for

Output

L9 L12

L10

and

Lll

coils

should

introduc-

of

on

-

19

into the adjustment in

output with

to

track TUNE knob close 10

8-12.

circuit the the for the Back above 50V

8-13.

impedance with

field

of

the

is

required.

this

the

mixer

setting

to

the

setting

meter

band.

ALIGNMENT PLATE

To

adjust

of

the

transmitter

10

meter

OF 9 MC

COIL.

the

9 MC

in

band. With

50V RMS (50% on RFO

core

of

coil

off

the

carrier

RMS

during

FILTER

The

TERMINATION

filter

alignment

matching

the

hermetically

FL1.

as

follows

1. The

filter

before

any

attempted.

A. Tune

eration

at

3800 KC

B. Connect

the

MIC

connector

with

the

Ballantine generator level

control

erator the

generator

ing

the output Also

for

50V

set

C.

input

frequency

voltage

note

excursions

at

1000 CPS

RMS

near

Maintain

voltage

above

drops

maximum

cies. A normal 6 DB 500 CPS

at

(lOV

a

need

as

or

the

high end,

RMS

2. for

follows:

less

change)

If

the

filter

at

check

termination

A. Tune eration Turn connect

wires 680

Connect

lifted

at

the

at

ohm

from

3800 KC into a

transmitter

crystal

the

filter

resistor

a 270,000

the

filter

coils

determine

If

there

test,

knife

the

and

driver

at

obtained

core

IF

the

stages.

21,000 KC

for

IF

AMPLIFIER

of

coil

amplifier

CW

mode

the

carrier

meter

L3

for

maximum

level

if

the

adjustment.

ALIGNMENT.

consists

coils

Ll

sealed

response termination

the

transmitter

into a dummy

the

AF

and

monitor

voltmeter.

and

adjust

RF

output with

gain

constant

and

change

and

below

at

which to

25

the

volts

between

frequency

the

low

end, 2200 CPS

and

less

than 2 DB

in

the

pass

made

the

transmitter

dummy

off

completely

unit

(FLl)

terminals,

R16

at

the

ohm

resistor

terminals.

whether

is

an

increase

coils

accordingly

The DRIVER

will

fall

28,000

KC

L3

in

tube

V3A,

at

29,000 KC

level

the

adjusted

scale),

RF

output

and

crystal

should be

rises

of

adjusting

L2

associated

filter

checked

adjustments

for

SSB

antenna

signal

generator

the

input

Set

the

AF

the

generator

the

MIC GAIN

setting.

AF

Signal

the

frequency

1000 CPS,

record-

transmitter

RMS

(-6

these

two

frequen-

response

will

or

variation

band. in

step 1 indicates

adjustment

proceed

for

antenna

and

input

and

disconnect

filter

terminal

between

the

an

very

on

the

plate

tune

in

adjust

output.

much

the

unit

are

op-

load.

to

voltage

signal

gen-

of

RF

DB).

run

more

CW

op-

load.

dis-

output

the

end.

wires

B. CARRIER output,

for

maximum

control

and

adjust

C. and

reconnect

Check

If

of amplifier

8-14.

the

a

major

coil

L2,

CARRIER

ADJUSTMENT.

filter

change recheck

coil

The two

been

set

to

match mitter unless filter transformer and oscillator carrier

cover

and

the

unit

L2

must

oscillators

1. of the

2.

generally

trimmers

has

Tl

be

can

Remove

transmitter.

Disconnect

tube V2B.

3.

Tune up 3800 KC into a the

RF

voltage

or

equivalent.

4.

Activate ing

SSB

operation

the

jumper

the

chassis.

5.

position

LSB oscillator. OFF.)

6. warping maximum

Set

(VFO

Set

MIC GAIN Mark

trimmer

RF

wire

to

voltage

7. Unbalance with

the

carrier

obtain

capacitor

l8V

8.

RMS

Turn

C12

(OPERATION

9. The be

somewhat warping

KC oscillator frequency

setting

10.

to

Set

activate

trimmer frequency skirt

OPERATION

Turn

the

transmitter

for

approximately

the

cores

RF

output.

Remove

the

filter

response

occurred

the

alignment

L3. See

OSCILLATOR

carrier

the

filter

paragraph

oscillator

do

have

been

installed.

and

filter

in

adjustment

be

set

to

exact

are

set

the

cabinet

capacitor

the

transmitter

dummy

antenna

with a Model

the

transmitter

by

connecting a clip

in

the

VOX

OPERATION

activate

switch

at

control

the

position

C14,

then

at

the

balance

at

the

dummy

off

the

transmitter,

and

turn

the

control

RF

less.

of

output

Carefully

Cp4

is

the

9001. 5 KC

set

for

now 25

filter

on

of

coils

270,000

and

as

in

ohm

680

ohm

outlined

the

of

8-12.

FREQUENCY

frequencies

unit

FLI

in

not

require

been

disturbed

Carrier

termination

before

frequency.

to

frequency

cover

C12

in

load

4l0B

RF

for

UNIT

control

the

8998.7 KC

XMTR, CAL

full CCW.

of

the

turn

the

dummy

antenna

modulator

potentiometer

antenna

reconnect

transmitter

at

white LSB

level

in

step 7 will

adjust

1 V RMS. The

DB

down the

FL1.

control

at

the

carrier

and

set

10V RMS

Ll

and

resistor

resistor.

in

step

core

setting

the

9 MC

have

the

trans-

resetting

or

a new

oscillator

coils

the

carrier

The two

as

follows:

and

bottom

at

Pin 2 of

CW

mode

and

monitor

voltmeter

the

follow-

lead

from

plug

(PI)

at

the

white

carrier

switch

8998.7 KC

trimmer

load.

sufficiently

R13 to

load.

back

setting).

now

the

8998.7

carrier

lower

white USB

oscillator.

the RF

L2

1.

IF

Ll

at

to

at

for

the

on

20

-

V5

IZBY7A

DRIVER

Ov

ov

-3VTO

-3.5V

':"Jvl~~~Jg\i5VTO

NOTESi

I.

UHE

2.

MEASUREMENTS

SOCKET

5.

VOLTAGES UNLESS

4,

~~A~cfCTLAtf~:"~lr

EXCEPT

WITH A

5.

He

•.

g~kg~&~~~WJ~

OPERATION --SSB

hUC

CARRIER

BAND

METER

OV

VOLTAGE

OTHERWISE

GRID

20.000

-NO

CONNECTION.

GAIN

SELECTOR

2

AT

TO

CHASSIS.

SHOWN

DATA

OHM/VOLT

---

LEVEL-MIN

---

117

VAC.

TAKEN

FRO"

TUBE

ARE

POSITIVE

DC

SPECIAED.

:~~gT:2:'C

MAY

BE

oaTAINED

METER.

mfJrtcl'ws:

USB/lSB

..

,N

- 3.5

OFF

V6

6HFlI

POWER

AMP

-70V

NC

CAL----OFF VFO----

MIC

PTT

DATA

SHOWN FOR SPECI FIC

TROL SETTINGS. -1.7V(C}-80V

AIOP£

j

B OPE C VFO AT

t~)

i1~Ji;~lEcfJ~~T

\~}~~~A\~ij;~~Tt~

WITH

SW

KEY

XMTR

CLOSED

OPEN.

CON-

AT

STaY

CW-TUNE ReVR

(C)(0)-135V

80M/20M

%¥~'~~~~~M

Figure 10,

TO

I

Voltage

-85V(A)-135V(OH35V

Chart.

OAZ

VOLTAGE REGULATOR

6EAS

9MC

IF AMP a AALC AMP

6.3VAC

IIOV

OV

47V

IZAT7

a

2NDMICAMP

1ST

V9

V3

VI

6.3

IIOV(AHV(BIOV

NC

ISOV

NC

OV

1.2V

1.3V

OV

VAC

ov

2.5V

8

(A)0.3V(B)0.'V

OV

'156-007043B

0

0 0

CRYSTAL

NOTES:

!.

RESISTANCE

2.

ALL

READINGS

3.

UNLESS FOR

4.

NC"NO CONNECTION

A-QC

B-VARIES WITH C-50CK

MEASUREMENTS

LESS

OTHERWISE SPECIFIED RESISTANCE VALUES ARE SHOWN

THE

FOLLOWING CONTROL

OPERAT10N-

GAIN-

MIC

CARRIER

LEVEL-_

BAND

SELECTOR-_

METER-

____

CALVFO-

FOR

OPERATION SWITCH AT

FOR

OPERATION

KEY OPEN.

V5

12BYTA

DRIVER

V4

6AH6

MIXER

V8

6EA8

THAN

___

MIC

OSC

ARE

GAIN

a MIXER

MADE

ONE OHM

RED USB FULL

FULL

3.5

MA

OFF XMTR

SETTING.

SWITCH

15K

28K

0

~

25K

270K

0

WITH

LINE

TUBE

SHOWN

EXCEPT

STBY

AS

AND

CORD DISCONNECTED.

SOCKET

ZERO.

USB/LSB

AT

FROM ARE

SETTINGS.

CCW

ALL

AT

TO CHASSIS.

SETTINGS.

CW-TUNE WITH

o o

140K

V6

6HF5

POWER AMP

V7

6BA6

VFO

80K

lOOK

18K

30K

55<

V9

OA2

VOLTAGE REGULATOR

NC

0

CARRIER

o

MC

1ST

IF

a 2ND

OSC.

6EA8

AMP 6

12AT7

V3

AALC

VI

MIG

V2

a 3RD MIC AMP

o

40K

26K

NC

AMP

20K

100

1000

470K

AMP

170K(AI

0-500K(8)

4700

o

18K

600K

4700

o

Figure

II.

Resistance

Chart.

156-007042

-27

11.

Mark

the

position

of

the

9001.5 KC

warping trimmer

C13,

then

turn

the

trimmer

for

maximum

RF

voltage

at

the

dummy

antenn

a

load.

12.

Adjust

the

carrier

balance

potentio-

meter

R13

for

18V RMS

reference

and

reset

trimmer

C13

for

1 V RMS.

The

9001.5 KC

car-

rier

oscillator

frequency

is

now

set

25

DB down

the high

frequency

skirt

of

the

filter

FL1.

13.

Set

the

transmitter rig

ht

side

up on the

bench

and

rebalance

the

modulator

with

the

car

-

rier

balance

controls

C17

and

R13.

14.

The

above

procedure,

properly

carried

out,

will

set

the

two

carrier

oscillator

frequencies

25 DB down

the

skirts

of

the

filter

and

the

ad-

justed

frequencies

will

be

at

8998.700

KC

and

9001.500

KC

within

±200

CPS

which

can

be

matched

by

the

BFa

adjustment

in

the

Model

SX-146

receiv

er

for

"slave"

or

transceiver

operation.

SECTION

IX

MODEL

HA-16

VOX

CONTROL

UNIT

i

I

!

I

·1

Figure

12

.

Model

HA-16,

Mounted

on

HT-46

Transmitte

r.

9-1.

DESCRIPTION.

Hallicrafters

Model

HA-16

VOX

Control

Unit

is

an

accessory

unit

for

the

Model

HT-46

Trans-

mitter.

Installation

of

this

unit

on

the

transmitter

will

permit

voice-controlled,

single-sideband

op-

e

ration

in

addition

to

the

normal

push-to-talk

controL

The

control

unit

may

be

attached

or

r

emoved

from

the

transmitter

in a

matter of

minute

s_

With

the

accessory

unit

mounted

and

adjusted,

the

ope

rator may

select

either

mode of

co

ntrol

as

desired.

9-2

. INSTALLATION.

1.

Remove

the

jumper

plug

(P1)

presently

installed

in

the

VOX UNIT

socket

located

on

the

rear

chassis

apron

of

the

transmitter.

Save

the

jumper

plug for

it

must

be

replaced

if

the

control

unit

is

disconnected.

2.

Loosen

the ground

bolt

nut

at

the

rear

of

the

transmitter

and

space

the

flat

washers

about

1/ 8

inch

apart.

22-

3. Hook

the

Model

HA-16

VOX

Control

Unit

into

the

two

key

holes

in

the

rear

cabinet

wall

just

above

the

ground

bolt

and

insert

the

notched

flan

ge

between

the

flat

washers

of

the

ground

bolt.

Tighten

the

ground

bolt

nut.

4.

Plug the

inter-connecting cable

of

the

control

unit

into

the

VOX UNIT

socket.

The

unit

is

now

ready for

adjustment

and

operation.

9-3.

OPERATION.

Set

the

PTT

- VOX

switch

on

the

control

unit

to

PTT

and check

the

transmitter

for

normal

push-to-talk control.

With

the

switch

in

this

posi-

tion,

the

transmitter

should

continue

to

ope

rat

e

as

before

from

the mic

rophone

switch.

Before

proceeding with

VOX

operation,

a

word

of

caution

is

in

order.

Some

microphon

es

equipped

for

push-to-talk

control

have

shorting

contacts

in

the

switch

to

disable

the

microphon

e

element

when

the

pushbutton

is

released.

VOX

operation

will

not

be

feasible

unless

this

circuitry

is

disconnected

within

the

microphone.

To

set

up

the

VOX

Control

Unit

for

voice

control

operation,

proceed

as

follows:

1.

Set

the

three

cont

r o

ls (SENS. ,

DELAY,

and

ANTI-

TRIP)

at

their

full co

unter

clockwise

positions.

2.

Set

the

AF

GAIN

control

on

the

re-

ceiver

fully

counterclockwise.

3. To

prevent

modulation

of

the

tran

s-

mitter

during the

following adjustments,

set the

MIC GAIN

control

fully

counterclockwise.

4.

With the

OPERATION

control

on

the

transmitter

set

at

SSB,

set

the

PTT -VOX

selec-

tor

switch

on

the

control

unit

at

VOX

and

set

the

remaining control

unit

controls

as

follows:

V4

02

- ;

C4

10

C

404

1-

~

R4

0 1

K40

1

lD

ELAy

l

R4

11

~

.-

I

ANTI-T

RIP

I

~-R42

0

C4

05

156·

003539

Figure

13

.

Model

HA·16,

Internal

View

.

A.

Advanc

e the SENS.

control (clock-

wis

e)

while

talkin

g into

the

microphon

e,

until

the

VOX

rela

y c

loses

on the

first

syllable

of

speech.

VOX

operation

will

be the

smoothest when

no

more VOX

gain th

an

necessary is

use

d.

B.

Adjust

the

DELAY

control for

the

desired

drop-out

delay.

The

delay

period

increases

as

the

DELAY

control

is

turned

clockwis

e.

The

del

ay

period

should

be

lon

g enough

to

prevent

changeover

between

words

but

not

lon

g enough to

miss

the

other

operator's

quick

repl

y.

C.

Set

the

receiver

AF

GAIN co

ntrol

for

the

desired

listening level

and

advance the

ANTI-

TRIP

sensitivity

control

(clockwis

e)

until

th e

received

signals

do

not

actuate

the

VOX

rela

y.

Excessi

ve anti-trip

gain or

a m

ajor inc

rease

in

the es

tablished

listening level may lock

out

the

vo

ice

control

system.

To

obtain

the greatest

mar-

g

in

of

anti-trip

control

range,

the

following

rules

app

ly:

(1)

Avoid

setting

the

microphone

close

to

and

directly

in

front

of

the

speaker.

(2)

Turn

the

active

side

of

the

microphone

away

from

the

speaker

and

select

a

communication

type

microphon

e with a high fro

nt-

to-back

sensitivity

ratio.

Wit

h the VOX

Control

Unit

adjusted, either

method of contr

ol

may

be

selected

by

simpl

y

setting the

selector

switch

for

either

PTT

or

VOX.

Do

not

forget

to r e set

the

MIC GAIN co

ntro

l

after

settin

g up

the

voi

ce

control

circuits.

Th

e

VOX SENS.

and

the

MIC GAIN

controls

are entir

ely

independent

of

each

other,

and

may

be

adjusted

accordin

gly.

9-4. CHASSIS

COVER

REMOVAL.

The VOX

Control

Unit

must

be

disconnected

from

the

transmitter

unit

to

gain

access

to

the

internal

circuitr

y.

Remove

two

Phillips

head

screws,

locat

ed

at the

base

of

the

unit,

and

lift

the

cover

plate clear

of

the

housin

g.

If

live

circuit

testing must

be

done on

the

control

unit, a clip

lead

is

connected

between

the

VOX

unit

and

the

transmitter

gro

und

bolt

to

pro-

vide

the

required

ground

return

for

both

power

and

signal

circuits.

-23

R403 470K

C401

0.001

+40V

f---il------,

I

R402

I

MEG

R401

I

MEG

I

SENS

UNLESS OTHERWISE SPECIFIED,

ALL ALL SEE PARTS

V40lA

11212AT7

2

3 +/./v

I

R404 2200

GROUND

BOLT

TRANSMITTER

RESISTORS ARE IN OHMS,10%,1/2 WATT. CAPACITORS ARE IN

LIST

FOR

VOLTAGE

B

R405

I

MEG

r--+

ON

UFo

RATINGS,

R407

1500

C404

0.1

68NB

R409 lOOK

R412 lOOK

12AT7

R413 1500

9 /2.6V(ci)o.6A

V402C

1/368NB

I

R414 lOOK

C407

0.001

.p

V403A 12AX7A

C40B

0.01 3

I

+/.7V

R415 220K

+l90V

2

R416

3300

YELLOW

RED

+275V

C409

0.001

R418

470K

15S-000067S

Schematic

Symbol

C401,402,

407,409

C403 C404

C405

C406 C408,411 C410

K401

P401 R401,420

R402,405,

408,417

Description

Capacitor,

Ceramic,

0.01 iJ.F, 20%, 500V

Capacitor,

Ceramic

0.002 iJ.F, 20%, 500V

Capacitor,

Paper,

Molded

0.1 iJ.F,

100/0,

200V

Capacitor,

Paper,

Molded

0.22 iJ.F, 10%,

200V

Capacitor,

iJ.F, 25V

25

Capacitor,

Electrolytic, Ceramic,

0.01 iJ.F, 20%, 500V

Capacitor,

iJ.F, 25V

5 Relay, Plug,

Electrolytic,

VOX

6-Pin

Inter-

connecting Resistor,

Variable,

1 Megohm, 30%,

watt,

SENSitivity

ANTI-TRIP Resistor,

Megohm, 10%,

Carbon,

1/2

Figure 14, Model HA·16, Schematic Diagram.

PARTS

Hallicrafters Part

Number 047-001671 047-100395 R404

046-001294-004

046-001298-004

045-000883 047-100354 R411 045-000938 021-000754

035-000088 S401

LIST

Schematic

Symbol

R403,418

R406,415 R407,413 R409,412,

414

R410

R416,419

Description

Resistor,

ohm,

Resistor,

ohm,

Resistor,

ohm,

Resistor,

ohm,

Resistor,

ohm,

Resistor,

ohm,

Resistor,

Carbon,

10%,

Carbon,

10%,

Carbon,

10%,

Carbon,

10%,

Carbon,

10%,

Carbon,

10%,

Variable, Megohm, 30%, DELAY

Resistor,

ohm,

Carbon,

10%,

Switch, Slide,

470K 451-252474

1/2

watt

2200 451-252222

1/2

watt

220K 451-252224

1/2

watt

1500 451-252152

1/2

watt

lOOK

1/2

watt

820K 451-252824

1/2

watt

5 025-002360

1/4

watt,

3300 451-252332

1/2

watt

SPDT,

VOX-PTT

025-002359

1/4

and

V401 V402 V403

Tube, Type 12AT7 090-900034 Tube, Type 6BN8 090-001465 Tube, Type 12AX7A 090-001458 Cover

1 451-252105 Shield, Tube (V401,403)

watt

Shield, Tube (V402)

Hallicrafters Part

Number

451-252104

060-002463

066-004196 069-201190 069-201189

24 -

C2

0.001

1/2

-12AT7

1/2

-12AT7

1/2-12AT7

1/2-6EAB

6AH

6 1800

12SY7A

VIA

VIS

V2A

V3A

V4

1 C33

V5

1ST

AUDIO

r--r---r-------r--~:r______,

2:

N

r

D

AUDIO

AMPL

3RD AUDIO'r-_...,._....;;;2",/5.;,V",D ...

C,

IF

AMPL

MI

XER

PF

DRIVER

I;i~

AMPL

2J-

R3

H;O ~ R4g!1

7 6

oC

605

AMP\~

±g~2 9 MC~

C~~

®.

#}5

L4&

lC34

S2E I S2E

C42

?65

39

7 8 I

S2F

~~i4.:~sgR

~~3

;~~

;

~]

220K

500K

I

\;':;

2

'7"2-qg~62

t----r-lf-r--t----ht...

"7'

6

f1g~~5

l~~

R~'"

'~h':'"

"" " '"

I';"

rrihi

r';::,~FRONT.

PF,O

II 2

~3--P.j(F'---P--,F

3 IMIC GAIN! 8

C8,4o

R7

8't-,t---,---t-:-:-:---,

2

L3

~

r::--:,,~

4.7 I PF

~ 0 ~

n 4

R2

C3

R5

R6

470

1

470K

l~RS

cia

I

CII

r;::

:::il

A f .

0.J

P

,~4

C49

~/

L9 _ "-'----_.,...,

M

2

E·

2

G

2p2FO

C4

4700

lOOK

PF

4700

0.22

;f0001

R22

C26 R23

1J.'47b I R25

R26

R27

C40,

C40C

~77t;,

6 5

C44

R37

R3S

0.01

A 5 • C57

0.002

..

100 ~ 0.01

10K I PF:!J

22K

lOOK

220K

(

~,L8

~

91

lOOK

5600

C40B

r8

___

~---<

~--iJ6

Ll3 a 150

~C-A-R-I~-{-t-~-SA-6-I-c--------~-j.--'~

L-----+-----t---------t&O~I-,L-2'

"\ii,

~~",

'It'

:l:,

21

I

[rl

;:-~R;:-_:7I!;;:E:;:~:-:;:r:7_U:7_N::_E"L

1/

u

~'u

",(r

l

! u

u':u m ,,: ~ ___

;W

j'l,

I

"~

t,,''',,"

:1

"

C55

100

PF

£

~ I TIA)-3-~--~-C;R*I----r---C~2rO-+---_~22~1-.-i-~l,-~

I

.~6~~;S;S~~~~~~~~===t~C~5~9l

CI2

r--r----t--t--t--t--2 ·-_-_3

'~-

l INS7 0.001

LI

fit'~

l~~~

-

13?l

CIIO~

C31

R29

~p~FgT

T~P~Fb

:C3p53F,krrCps52F3

~~OJ

V6

6HF5

PA

L1~

5,9

'"

3,6,B

h

+-=-R=-

39

O------'--'<

,,1---

1

*C64

15

K 4,10

1'0002

R40:0:C63

10

0.01

5%

IW

R41

10

~5%,IW

fL!5

*~61

MIH

1'0.02

CII2

om R42

100

C65

0.001 3KV

LI7

t----l

C66

I

*0001

"'3KV

~:6t

10RO:K~

:r~;/'

,CA::~ER

RI3

12:::

~

, L

~

0.005..

260VDC

~0005

10K

_ _ _

__

I .J

250

tg~65

I

C36,-5%

LI14

C60,*

r----t-,

~

---

4

~f8

3

2gc\

v

t

r--tg~~ ~~5K

/50VDC

REG

MH

0.001 t

~li55~J615c!o

"'-II

12

OCd~5'1"

_

.---:::::-

t--~=---I------1

R30

5%

PF

-'0-.......

C

I~*

RJO.

?

r-

4700

R32

KC

10

J!:\

~43

0.0021'

10K CI7

CI8

FN~~

RI4

RI5

S2rt

RI7

5%

8200

CI4

Y2

'r"))..:..J

,j.

~F25

I~F

10K

47K

lOavy

47K

I

S3

R33

R43 S20K 5%

1

~44

1200

5·25

8998.7=

I 5

Cdr

,r--

@TI\~_)_------,IOK

PF

KC

I 6 SIA

200V1'

R21

R31

I REAR

CARRIER

150K

10

I

L-+----+~-+--~--------------~~B~A=L------------------~------t_--------~----------_lr_----------_t-------+----\J-<R---t-----------1--------~

MEG

I

v3s@illl-I'CARRIERJ

1/2-6EAB

L

:

C23,k

RIBl

CR3

~,CR4

C24 I =-9

AALC-AMPL

@&I

LEVEL

:

1006~r

MJd-IN456,1.IN456

0.01

---

C25

0.001

260VDC

RI9 S R20

IK

470K

/50

VDC REG

/50VDC

REG

/50

VOC

REG

-/30VDC

1

C39

"f

10

150V

R34

r-

4700~

~CIII

....

0.01

/50VDC

REG

TRANS

-7BVDCNOM/NAL

STBY

-/35VOC

260VDC

-/3D

VDC

275VDC

I

,

L

__

_

R~I:R

~11=

il--

':',..L

L----------------i~----------------------------------------_1~----------------_*----------------------------------------------------------lr-------------tr-----------------------------------t------lr----lt---------

--~~~--_t_=~~_~~~~~~'~B~:

5

,

1/60VDC

R74 3300

I

OPERATION

I

~5%

650VDC

~

2/5

VDC

2/5

VDC

2/5VDC

Z/5VDC

KEY

~{A~

IBAND SELECTOR I

L20

/le72

1'0002

~,C79

6S00

1'0.005

---.....,

,

I

,

I

,j-STRAY

,

CAP

I

I I

I

~~gNT

10 213

L25.-l

R5S

r_2C=29=-~_F

_

_)f.::.~"'·~"'J-'-P..:.F___,

~ ~ 5~l,..boo

I

T2

I

~l~~~4~~U~H~--~I~~~-;~;==w~~~

b~~

~I

ni

~

~j;~1~

~6:

I

~

-

13

----'

-!-

I

~-====:14

~--~~~~~(~!==:=::=:I:

i':=~=F=t==~I\~

t~~

1

3

'---

----'

T4

jR63 jlOK

..

R6~f

47K

..

'--

__________

~----~~2~.~~~~-~r._~~~.4------+_---------'

R57

~~~t

I!

b~.i,t,j

01

~F

13

R65

.-------h

I

3000

5W

W

-

II

_ 3

- I 1

10

R66

6 '

2000

I

12

5W

I

,

12

!

1~~

!

tt

'

;*-

i SIC

, @IT] I

KI

13

I I

/2.6

VAC

R67

10

1/2

CR6 INI393

j I

!----6~VAC

,I~

6

T5

I

r--------t-~I

.---~~"

~b~~t : 61{~~~4

CIOI P I

~CRI2

r-_O_.O_O_I_l ......

-'>:

C R II

I I

+ CI02D

l'250

- 25V

IN3195

CR7

18)

CRS

650VDC

CR9

,CI03

RIO

90

500V

S4~'1

MI MA'

260

VDC

R45 27K

~C109

JIg6v

275VOC

/30

VDC

/6DVDC

2/5VDC

R71 25K lOW

R72 1000 5W

R73 47K

~======t=~==~~=+~-r~L----J

FI

:g~

15~~

I~~ov

CR5 IN4S

C80 130 PF

CSI 56PF

C"'

coo

~\ld,i,,1

eo,

::

i

~~

dl~'

,'"o~~ri~::,

,'i:Mt--.-~-~~b

....

o-'-I'--I-'-4---'

----'

....

CB2

C83

10

S2

100

NPO

F~6

27K

2 3

260

VOC

260

VDC

~:

Ii"\I

Ihttps://manualmachine.com/

PF PF PF

CB8

I-J,

I

~)

I C90

R53

®--

'''~

C95

C99,!,;

61-

t_t-t-t---_____,

I

f-f

U " N750

NSO

NPO

B2

PF

R51

7

±~.OOI

82

R55 7 1'0.002

0.01

l'

.-----h

......

+--t_J

' .

L24

~

3

AMP

SLO-BLO

R6Sl

R70)

L26

',k~102A

~

____________

~2~Z~5~~~DC~----------------~

-/30VDC

S2A

'--+;+---

......

--+--t-!-+---+--C~8;:;_

47K'

m£J

~

~t----,4l7K

R56

C94

J66-------2--

I

-

3-4-~

J5fo-~1t----

5--

~-

6--~--

9-

S'I

FRONT

TUNE

0.002'1"

100

0005

:I'

~-t--1'-'I'

l'

SXI46~J~3~~-------------------------------------------·----t_-----------------'lllxMTRI

f~~~

L-

______ ' ___ . ____________________________________________________________________________________________

----~PII-------

~-'

r

INJECT

r

S5

1~~4

I

....

~

>-

NOTES:

....

5 8

~

UNLESS OTHERWISE SPECIFIED, g

""

~

>-

~~~

~~~~~I~~~SA~~~~N

°8~I~E~

~~o~T~~I;TA;6R

VOLTAGE

RATINGS

1.

~

§

~

; d

~ ~

~

2

~~LA~:~:I~~~DO;O~;~~ES:~~~T~~M~~~T~~AFT

~

~ ~ ~

c;j

~ ~ ~

;i

3

c=

SIGNIFIES FRONT PANEL

MARKINGS.

+ +

a..

V> V>

0:

Z Z

0:

U

4

ALL

WAFERS

SHOWN

IN

CCW

POSITION

5.

OS 3 IS

IN

TERNAL

METE R LAM P

6.

DOT

ON

SWITCH

INDICATES

FRONT AND REAR ROTOR CONNECTED.

7.

* CRYSTALS

NOT

SUPPLI

ED

WITH TRANSMITTER. SEE PARTS

LIST

FOR

CRYSTAL LISTING.

VOX

UN

IT

CONTI~)L

OUTLET

Figure

15.

Model HT-46 Schematic Diagram.

>-

0

W

0:

l<

'"

117VAC

113

50-60

CPS

,

: I ~ CRI5

MI05

-J,... IN3194

+r

100

!R69 ...

IOOK

l

~ ~ ~

NO

OONTACTS

~

!;!

l

~

ARM

2

10

II

12

NC

CONTACTS

13

14

e e

KI

BOTTOM VIEW

R46 4700 5%,IW

R47 2700 5%,IW

V6

.--~I

~12+~

CI06

V2

~

VI

~

V3

~

VS

~

V7

~

V4

~

V5

~

DS2

~

6.3

xL

VAC

156-00Q431C

~lg6v

CI07

~0005

CIOS

1'0.01

Schematic

Symbol

CI C2,1I,20, 25,60,90 C3,42

C4,16,27, 64,72,73, 74,89,95 C5,8

C6,24,26, 35,37, 46,47,49, 63,99,108, 111,112 C7,15,21, 28,31,32, 79,94,98, 107,110 C9,61

ClO

Description

CAPACITORS

20 /-IF, 25V,

Electrolytic

0,001

/-IF, ±20%,500V

Ceramic

220

PF,

±2%, 500V,

Mica

0,002

/-IF, ±20%,500V,

Ceramic

470

PF,

±5%, 500V,

Mica

0,01

/-IF, ±20%, 500V,

Ceramic

0.005

/-IF, ±20%, 500V,

Ceramic

0.02

/-IF, ±20%, 500V,

Ceramic

0.22 M F,

±10%, 200V,

Paper

C12 5

PF,

±0.25

PF,

500V,

NPO,

Ceramic

CI3,14,17

Variable,

5-25

PF,

Trimmer

CI8,29, 75,93 C19,36

10

PF,

±2%, 500V,

Mica

0.1

/-IF, ±10%, 200V,

Paper

C22,:G3,

0.1

MF, +80%,

-20%,

106,109

100V,

Ceramic

C30,54,96

22

PF,

2%,

500V, C33 C34,81 C39

C40A,B,

C

C41,43, 52,78 C44

C45,48, 55,69 C50

C53 C56 C57,70 C58 C59 C62

C65,66 C67

C68 C71

C76

C77

C80 C82 C83

C51

Mica

1800

PF,

±5%, 500V,

Mica

56

PF,

±2%, 500V,

Mica

10 MF, 150V,

ElectrolytiC

Variable,

DRIVER

TUNE

33

PF,

±2%,500V,

Mica

91

PF,

±2%,

500V,

Mica

100

PF,

±2%,500V,

Mica

270

PF,

±2%,500V,

Mica

82

PF,

±2%, 500V,

Mica

240

PF,

±2%, 500V,

Mica

150

PF,

±2%, 500V,

Mica

68

PF,

±2%, 500V,

Mica

310

PF,

±2%,500V,

Mica

Variable,

1-13

PF,

Trimmer

0.001

MF, ±20%, 3 KV,

Ceramic

Variable,

FINAL

TUNE

200

PF,

±2%,500V,

Mica

300

PF,

±2%,500V,

Mica

0.33

PF,

±10%, 500V,

Ceramic

16

PF,

±2%, 500V,

Mica

130

PF,

±2%, 500V,

Mica

Variable,

1-8

PF,

Trimmer

Variable,

VFO

680

PF,

5%,

500V,Mica

Hallicrafters Part

Number

045-001147 047-001671

493-110221-334

047-100395

493-110471-234

047-100354

047-100442

047-100471 046-001298-004 491-001050-022

044-200545 493-110100-331 046-001294-004

047-001428

493-110220-333 493-310182-234 493-110560-334

045-200307

048-000609

493-110330-333 493-110910-334

493-110101-334 493-110271-334 493-110820-333 493-110241-334 493-110151-334 493-110680-334 493-110311-334

044-000520

047-100397

048-000610

493-210201-334 493-110301-334 047

-000403-016

493-110160-331

493-210131-334

044-000593 04R-000595

493-210681-234

SERVICE

REPAIR

PARTS

LIST

Schematic

Symbol

Description

Hallicrafters

Part

Number

C84 C85 C86 C87 C88 C91 C92 C97 CI00,101 C102A,B,

C,D CI03 C104

CI05 C113

R1 R2 R3,27 R4

R5,8,28, 34,61

R6,9,26,

37,57,69 R7,20 RI0,14, 23,48,59, 62,63 Rll,12 R13

RI5,17, 51,55,64, 73 R16

RIB

R19 R21 R22,42, 56 R24 R25 R29 R30 R31

R32 R33

R35 R36 R38 R39 R40,41 R43 R44 R45,52 R46 R47 R49 R50 R53,54 R58,74 R60 R65 R66

CAPACITORS

(CONT)

10

PF,

±0.25

PF,

500V,

491-001100-093

N750,

Ceramic

82

PF,

±2%,

500V,

491-054820-042

N80,

Ceramic

100

PF,

±2%, 500V,

491-054101-022

NPO,

Ceramic

47

PF,

±2%,

500V,

491-024470-022

NPO,

Ceramic

82

PF,

±2%,500V,

491-054820-022

NPO,

Ceramic

47

PF,

±2%,500V,

493-110470-333

Mica

4.7

PF,

±2%,

500V,

493-240470-331

Mica

0.68

PF,

±10%, 500V,

047-000403-001

Ceramic

0.001 /J.F, -0%, +100%,

047-002217

1400V,

Ceramic

3 x 50 MF, 350V; 250 MF,

045-001370

25V,

ElectrolytiC

90 MF, 500V,

Electrolytic

045-001337

90 MF, 500V,

045-001338

ElectrolytiC

100 /-IF, 150 VDC,

045-001371

ElectrolytiC

680 PF,2o/o,300V,Mica

493-110681-324

'RESISTORS

47K

ohm,

1/4

Watt

2.2

Megohm,

1/4

Watt

220K

Ohm

Variable,

500K

Ohm,

±30%,

1/8

Watt,

MIC GAIN

4700

Ohm

lOOK

Ohm

470K

Ohm

10K

Ohm

470

Ohm

250

Ohm,

±20%,

1/4

Watt

CARRIER

BAL.

47K

Ohm

680

Ohm

1

Megohm

1000

Ohm

150K

Ohm

100

Ohm

451-152473 451-152225 451-252224 025-002528

451-252473 451-252104 451-252474

451-252103

451-252471 025-002527

451-252473

451-252681 451-252105 451-252102 451-252154 451-252101

2200

Ohm

451-252222

22K

Ohm

451-252223

10K

Ohm,

5%

451-251103

4700

Ohm,

5%

451-2514'12

10

Megohm,

-20%,

+40%,

025-002531

1/8

Watt,

CARRIER

LEVEL

8200

Ohm

451-252822

10K

Ohm,

±20%,

025-002330

3/4

Watt,

BIAS

ADJ

330K

Ohm,

5%

4.7

Ohm

5600

Ohm, 1 Watt

15K

Ohm

10

Ohm,

5%, 1 Watt

820K

Ohm,

5%

1200

Ohm,

5%

27K

Ohm

4700

Ohm,

5%, 1 Watt

2700

Ohm,

5%, 1 Watt

220

Ohm

6800

Ohm

82

Ohm

3300

Ohm

39K

Ohm

3000

Ohm, 5 Watt

2000

Ohm,

5%, 5 Watt

451-251334 451-252047 451-352562 451-252153 451-351100 451-251824 451-251122 451-252273

451-351472 451-351272 451-252221

451-252682

451-252820

451-252332

451-252393

445-012302

445-011202

Schematic

Symbol

Description

R67 R68 R70,71 R72

'RESISTORS

(CONT)

10

Ohm

150

Ohm,

5%,

10

Watt

25K

Ohm,

10

Watt

1000

Ohm,

5%, 5 Watt

Hallicrafters

Part

Number

451-252100 024-001607 445-032253 445-011102

'ALL

RESISTORS

are

carbon

type,

10%,

1/2

watt,

unless

otherwise

specified.

COILS AND TRANSFORMERS

Ll,3

Coil,

IF

050-002159

L2

Coil,

Filter

Termination

050-002161

L4

Coil,

Mixer,

80

Meter

050-002114

L5

Coil,

Mixer,

10

Meter

050-002110

L6

Coil,

Mixer,

15

Meter

050-002111

L7

Coil,

Mixer,

20

Meter

050-002112

L8

Coil,

Mixer,

40

Meter

050-002113

L9

Coil,

Driver,

80

Meter

050-002119

LlO

Coil,

Driver,

10

Meter

050-002115

Lll

Coil,

Driver,

15

Meter

050-002116

L12

Coil,

Driver,

20

Meter

050-002117

L13

Coil,

Driver,

40

Meter

050-002118

LI4,15,19

Choke,

1.0 MH

050-001044-005

L16

Choke,

Parasitic

050-002103

L17

Choke,

RF

050-002106

L18

Coil,

PI

Output

050-002105

L20

Coil,

Warping

051-002892

L21,22

Coil,

Warping

051-002893

L23

Call,

Het.

Xtal.

050-002120

L24 L25 L26 Tl

T2 T3 T4 T5

Oscillator

Coil,

VFO

Choke,

RF,

15

/-IH

Choke,

Filter

Transformer,

Carrier

O.'3cillator

Plate

Transformer,

Bandpass,

40

Meter

Transformer,

Bandpass,

15

Meter

Transformer,

Bandpass,

10

Meter

Transformer,

Power

ELECTRON

TUBES

AND DIODES

Vl,2

Tube,

Type

Type Type Type

Type

Type Type Type Type Type

12AT7

6EA8

6AH6 12BY7A 6HF5

6BA6

OA2

IN87 IN456 IN48 IN3193

IN3195

V3,8

Tube,

V4

Tube,

V5

Tube,

V6

Tube,

V7

Tube,

V9

Tube,

CRl,2

Diode,

CR3,4

Diode,

CR5

Diode,

CR6

Diode,

CR7

thru

Diode, CR14 CR15

SI S2

S3,4,5

Yl Y2 Y3 Y4

Y5 Y6 Y7 Y8

Diode,

Type

IN3194

SWITCHES

Switch, Rotary,

OPERATION

Switch,

Rotary,

BAND

SELECTOR

Switch,

Slide,

DPDT

CRYSTALS

9001.5 KC

8998.7

KC

33.5

MC (Not Supplied)

33

MC (Not

Supplied)

32.5

MC

32 MC (Not Supplied)

25.0

MC

21.5

Me

050-002109 050-002311 056-000786 050-002158

050-002145 050-002146 050-002147

050-002104

090-900034

090-901350 090-900793 090-901192

090-901653

090-901112

090-900001 019-002941 019-002964 019-101877 019-002768 019-002770

019-002769

060-002802 060-002803 060-000544

019-003653 019-003652 019-201966 019-201965

019-201964 019-201963 019-201961 019-201960

Schematic

Symbol

Description

Hallicrafters Part

Number

Jl J2 J3

J4 J5 J6 PI

FLI

Fl

DSl,2 Ml

Kl

CONNECTORS

Jack, Three

circuit,

MIC

Jack, Two

circuit,

KEY

Jack, Phono,

SX-146

INJECT

Jack,

Phono,

ANTENNA

Socket,

ll-pin

Socket, 6-pin

Plug,

6-pin

Plug,

ll-pin

Plug,

Phono

(SX-146

INJECT

and

ANTENNA)

MISCELLANEOUS

036-000391 036-000390 036-000396

036-100041 005-200707 006-001096 035-000088 035-100043 010-000221

Angle,

Window Mounting

067-012996

Bracket,

Piston

Capacitor

067-012948

Mounting

Bracket,

Socket Mounting

Cabinet,

Bottom

Cabinet, Bottom

Rivet

Assembly

067-012946 066-004622 150-009410

Cabinet,

Cover

066-004621

Chassis

Rivet

Assembly

150-008752

Coupler,

Driver

Tune

029-000564

Coupler,

Shaft

029-001061

Cover,

Final

Tank

066-004557

Escutcheon,

Meter

007

-000922

Escutcheon,

Panel

007-000861

Filter,

Crystal,

2.1 KC

049-000320

Flywheel

071-000212-002

Foot,

Front

016-001469

Foot,

Rear

016-002446

Front

Panel

Assembly

150-009409

Fuse, 3 ampere,

SLO-BLO

039-100390

Fuseholder

(Fl)

006-200837

Knob;

OPERATION,

MIC

015-001844

GAIN,

DRIVER

TUNE,

CARRIER

LEVEL,

BAND

SELECTOR,

FINAL

TUNE

Knob, MAIN TUNING

015-001751-003

Lamp,

Dial,

NO. 47

039-100004

Lock,

Line

Cord

076-004546-005

Meter

082-000676

Painter,

Dial

082-000667

Pulley,

Brass

028-200052-011

Pulley,

Nylon

028-000530-002

Rectifier

Board

150-008756

Assembly Relay Shaft, BAND

SELECTOR

Shaft,

DRIVER TUNE

Shaft,

FINAL

TUNE Shaft, TUNING Shield,

Final

Tank Shield,

Heat

Insert

Tube

Shield,

Switch

Shield,

Tube

(V2,3,8)

Shield,

Tube

(V

4)

Shield,

Tube

(V5)

Socket,

Pilot

Light

(Left

Side)

Socket,

Pilot

Light

(Right

Side)

Socket,

Tube, 9-pin

(VI)

Socket, Tube,

9-pin

(V2,3,5,8)

Socket,

Tube,

7-pin

(V4)

Socket,

Tube,

12-pin

(V6)

Socket,

Tube,

7-pin

(V7,9)

Spring,

Dial

Cord

Spring,

Dial

Plate

Window, Dial

Shield,

Fiber

Shield,RF

021-000831 074-003074 074-003075 074-003076 074-003055 067-012945 069-101020 067-012947 009-000855 069-000097 069-000863 086-000735

086-000734

006-001112 006-000395

006-200633 006-001131 006-001094 075-000893 075-001011 022-000745

069-0021~3

069-002633

094-904161C

767

Printecl

in

U.S.A.