Lafayette HA63 Service manual

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MUNICATION

OPERATI

S

NG

RECEIVER

MANUAL

FREQUENCY

RANGE

....

TECHNICAL

SPECIFICATIONS

Band A: 0.55

1.6

Band Band C: Band

B:

4.8

D: 10.5

-

1.6 Mc Mc

4.8

14.5 Mc Mc

31.0

OPERATION INTERMEDIATE SENSITIVITY SELECTIVITY ANTENNA

AUDIO AUXILIARY

TUBE

POWER

INPUT

OUTPUT

CIRCUITS

COMPLEMENT

SOURCE

FREQUENCY

.

AM, CW.

Kc.

455

1pV for 30 50 - 75

1.5 Electrical Bandspread

Automatic AVC-MVC BFO

"S"-meter

V1 V2 6BE6 V3 6BE6 V4 68A6 V5 V6 6AV6 V?

117

20 db SIN

db

r10

at

ohms,

watts,

68.4'6 RF Mixer HF

IF

6AV6 6AR5

volts,

B

Noise

DET, BFO Audio Output

50/60 cycles

ratio.

Kc.

balanced

ohms

Limiter

Amp Osc

Amp

AVC,

impedance.

or unbalanced.

ANL &

AmP

AC

1st Audio

AmP

POWER CONSUMPTION DIMENSIONS NET WEIGHT

. .

50VA

.

.13"wx7-4/5"

lbs.

16

. .

-2-

hx10"d.

INSTALLATION

PowER

llhe OPERATE

SPEAKER

A

two-terminal PM other 4-12

HEADPHONES

A

standard impedance (B-16 into

ANTENNAS The

connections.

results.

souRCE

receiver

FROM

CONNECTION

speaker

lead

to the terminal

inch

speaker

jack

the

terminals

of B

phone

automatically

Either

is

designed

A

strip

ohm

adequately.

jack

ohms)

marked

t.'

'td

DC

SOURCE.

marked

impedance.

designated

provided

is

headphones

disconnects

"A1",

of

the following

operate

SPEAKER

simply

go.

on

the

are

recommended

"A2",

and

two

from

a 11? volt,

is provided

connect

The output

front panel

any

speaker

,,E"

at the rear

types

at the

one

power

of

for

attached

of

connections

50-60

rear

lead

to

of

the

receiver

optimum

to the

of

the

cycle AC power

of

the receiver

ground

the

receiver

for

results.

8 ohm

receiver

can

be

terminal

is

headphone

Insertion

output

are for

used

to obtain

source.

for

connections

sufficient

reception.

of a phone

terminal.

antenna

DO

"O"

and

to

drive

ground

and satisfactory

NOT

to a

the

a

Low

plug

INVERTED The

inverted

Simply

good

Fig'

short

reception,

1)'

In

reception.

DOUBLET A

doublet transmission performance band

of frequencies.

following

Since

in

such

When and feet

formula:

the

doublet

a manner

using either

"A2"

respectively,

is

recommended

"L''

ANTENNA

"L"

type

A2

and

the

most

cases'

ANTENNA

antenna

line

should

only

at

antenna

that

a

of

E

with

antenna

a

give

will

be used

given

a

The

maximum

balanced

and

good

for

antenna

jumper

a

wire

connected

excellent

(as

frequency,

overall

(Length

I-

displays

signal pickup

transmission

jumper

the

reception

provide

will

wire,

should

be placed

from

results,

shown

it

length

in

of

feet)

directional

wire

of

satisfactory

and

connect

as

terminal

especially

in

Fig. 2).

should be

a

doublet

:

Frequency

antenna

properties

can be

line

o: a twisted pair,

between

realized.

"A2"

weak signals.

perforrnance

one

high

as

'{E"

to

on

amateur

Since

cut

the doublet

to

the length

in Megacycles

broadside

"116

end

of

possible

a

cold-water

can

be

to its

the leads

r'Brr

is

over

the

entire

the

antenna

and

wire

50-100

pipe

bands.

A

Z5

antenna provides

for

the

most

determined

length,

remcved.

it

ccnnect

should

to terminals

A

tuning

range.

to A1.

feet

long

will improve

ohms

balanced

optimum

often

by

using

be installed

height

of

For

(see

used

the

,,A1,,

80-50

-3-

o)

50 1 00FT.

t

" GROUND

G-*-

Doublet

unscrew

it,

control

the

will

the

plate

signal

is-

2

receiver

switch

desired'

be

FUNCTION

disable

voltages

FIGURE

FUSE

amp

1

A Replace

REMOTE A socket

transmitter.

during RECposition.ThecontactsoftheexternalswitchareattachedbymeansofastandardACplug

that

so inserted whentheswitchisclosedandsignalreceptionwillbeinstantaneous'

normal

For

position,

conditions,

off.

cut

I

located

is

fuse

with

only

SOCKET

back

the

in

An

periods

(see

pins

the

into

operating

providing

thus

the

set

Returnini'ifre

at

of

one

the

of

external

transmission.

of

Fig.

REMOTE

conditions

plate volag-e-to

swit"crr

.wit"f,

3)

Antenno

Wire

Single

(inverted

rear

the

similar

a

receiver

switching

be

will

socket.

with

soNo

the

to

L)

receiver'

the

of

rating'

(REMOTE) allows

be

device

In

connected

In

no

REC

can

this

manner,

this

external

the

position.

will

case'

when

switching,

stages'

RF

ln

provide

remove

To

simultaneous

used

the

signal

plate

position

itris

instantaneous

FIGURE

that

so

FUNCTION

reception

voltagl

place

manually

T-o

Antenno

spring

the

of this

will

is

applied

receiver

the

to

reception'

receiver

be

placed

This

the

to

switch

RF

the

loaded

with

inoperative

in is

plug

stages

RF

the

in

under

stages

cap'

the

then

REC

these

are

a

REMOTE

r---.r=

I

l-i_J

l-l

-l

FIGURE

E

XTERNAL

SwlTcH

3

Disconnect

across EXTERNAL

REMOTE

-4-

jumper

a

jack

SWITCH

wire

as

is

connected

shown

used.

in

figure

internallY

when

3

OPERATION

Following appreciation become

FUNCTION

OFF - AC

REC - Heater

SEND - This operative

BFO (CW).

BAND This

is

a brief description

as well as realization of

familiar

power

(see

-

switch

position places

This

The Bandspread

selects one of the

Band A: Band B: 1.60 Band C: 4.80 Band D:

with each of

is removed

plate

and

position

0.55 to 1.6 Mc

10.50 to 31.00 Mc

of

the control functions.

from

voltages are applied

removes plate

control

"Remote

the beat frequency

four

4.80

to

14.50

to

functions

the

the capabilities

receiver. In

the

voltages to the

is

used to adjust the

frequency bands

(550

Mc

and the receiver

Socket").

oscillator in

1600 Kc)

to

of

the

all

available

various

of

the receiver

other

RF stages, and

pitch

controls on the front

positions

is

able to receive

operation for

of the tone

as follows:

can be expected

power

AC

thus makes

the reception

produced

is

applied.

signals.

the receiver

of

on

CW signals.

panel.

only if you

co'de signals

Full

in-

MAIN TUNING

This

control operates quency Band A range white

100.

The main tuning dial short-wave station by noting the also noting both Bandspread and Main Tuning in

BANDSPREAD

This is especially or almost non-existent. the true received frequency. indicated

The Bandspread bands, or

scales,

covers the

of 1.6-31.00

scale lines.

manner.

this

control

by the

as a

one for each of the four tuning bands. All

the

is useful on short-wave frequencies

the tuning

Broadcast Band

Mc. The amateur radio

Calibrations of these

incorporates

also

position

used to

main

control

fine

of the Bandspread dial.

provide

When

tuning

can

tuning device to tune in commercial

pointer

"fine

the Bandspread dial

Rotating the Bandsprea.d dia.l

pointer.

be used in

over the main tuning

(550-1600

a 0 to 100 Logging Scale. This may

position can be

tuning"

two ways - to

Kc).

bands

scales

of the main tuning

quickly

over small

where separation between

The other

are

contained

are

correct only

A record

set to receive any of

is

set to 100, the main

dial. This

frequencies

three bands

within the thicker

when the Bandspread

pointer

may then

sections

towards 0 subtracts from

provide short-wave

dial has four

shown

be

the short-wave

of

the main

bandspreading

stations.

are

cover the

be used to log

on the

kept

of both numbers

stations is

tuning

calibrated fre-

in

megacycles

sections

any

Logging

stations logged

tuning

often

pointer

the frequency

over

the

(Mc).

short-wave

of the

dial is

scales. This

will indicate

set

to

particular

Scale and

so that

very small

amateur

-5-

Lafayette HA63 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual