Lafayette Ha-310a User manual

www.SteamPoweredRadio.Com

\

®

AL

Kl

LAFA

YCTTC

RADIO

CLCCTROIIICS

CORP.

l l l JERICHO

TLIRNPll<E

SYOSSET,

l.

I , NEW

YORK

LAFAYETTE

RADIO

ELECTRONICS

Printed

in

Japan

LM-lOA

'

..

,

Model HA-310A

CITIZENS

BAND

~-

"

WALKIE

TALKIE"

3 CHANNELS

WITH

RANGE BOOST

STOCK

NO.

99-31593L

OPERATING MANUAL

www.SteamPoweredRadio.Com

GENERAL

The

LAFAYETTE

HA

-3

10A

is

a 13

transistor

compact

hand-held

3

channel

transceiver

designed

to

operate

with

an

input

of 1.5

watt

to

the

final RF

power

stage. It

is

intended

for use in

th

ese D Citizens

Radio Service

under

conditions prescribed in

Part

95 of

th

e

FCC

Rules

and

Regulations.

This

requires a

simple

li

cens

ing

procedure

and

permits

operation

on

Channels

1

through

23.

Housed in a rugged

metal

case,

theHA-310A

comprises a fully m1ma•

turized

transmitter

and

receiver--both

crystal

controlled

for precise,

deper.qable

operation.

The

sensitive

superheterodyne

receiver section

consists

of

1

stage

of

radio frequency

amplification,

crystal co

ntrolled

local oscillator. 2

stages

of

intermediate

frequency

amplification

, auto•

matic

gain

control

for

preventing

overload of

strong

signals

as well

as

maintaining

signals

at

approxim;itely

the

same

level, plus

an

auto•

matic

noise

limiter

for suppression of

ignition

and

similar

type

elect-

·ical disturbances. A 1

stage

adjustable

squelch circuit

is

included

t<

quiet

the

receiver

during

standby

periods in

the

absence of a signal.

A 3

stage

push-pull

amplifier

provides

an

undistorted

high

output

through

the

built-in

speaker

/

microphone

. In

transmit

mode

the

push-

pull

amplifier

in

conjunction

with

RANGE

BOOST

is

used as a high

level m·

odulator

for

the

3

stage

crystal

controlled

transmitter.

The

RANGE

BOOST

amplifies

the

weak

voice

components

generated

by

the

speaker

/

microphone

to

produce a

higher

perct·

ntage

of

modulation

and

to

limit

the

higher

level

components

to

100%

modulation,

result-

ing

in increased

power

in

the

sidebands

with

extended

transmitting

range.

Unless

otherwise

ordered,

the

HA-310A

is

normally

supplied

with

cry-

stals

for

operation

on

channel

10.

Additional

mat

ched

pairs

of

crystals

(transmit

and

receive)

are

available

for

operation

on

any

of

the

other

. channels.

Although

built

to

withstand

a

certain

amount

of

abuse,

the

HA-310A

should

be

treated

with

the

care

normally

accorded

to

electronic

equipment.

Always

protect

the

unit

against

dirt

;ind

water.

If

the

unit

is

treated

with

reasonable

care.

the

only

maintenance

likely

to

be

nPeded

to

maintain

peak

performance

is

the

replacement

of

the

battery

when

necessary.

Ill'

l

TECHNICAL SPECIFICATIONS

SPECIFICATIONS

Frequency

range············

26. 965

to

27. 255

meg

acycles

(channels

1-2:1)

Number

of

c

hann

els·

····

·3

Operating

frequency

······Supplied

with

one

set

of

plug-in

c

rystals

for

channel

10(27.075

MHz

)

in

position A.

May

be

operated

on

any

other

ch

an

nels

by

insert-

ing

crysta

ls in

position

B and C sockets.

·Transmitter

····

····•

·

······

·Cr

ystal

controlled:

1.5

watt

input

to

the

final

RF

amplifier.

Meets

F.

C. C.

reg

.

Part

95.

Modulation

.....

....

......

...

High

level

push-pull

modulators,

100% capa-

bility

.

Receiver···········

··

·······

..

··C

rystal co

ntroll

ed

with

RF

stage,

455

KHz

I.F.

Sensitivity

··· ··•·····....··· ···

100

mw

. or

mor

e

at

1 uv

input

1 uv

for

10

db

S+N

/ N or

better

Sele

ct

ivity

····

······

····

·· ·

····

6 KC less

than

6 db, m

ore

than

25

db±l5KC

Audio

output

.. ···

·············More

th

an

500

mw.

Power

supply

····

···

......

· 12volts,

8

UM

-

3

type

battery

Antenna

···

···············

··· ·· ·50"

fully

extended

9

section

telescoping

Transistors·····••··••••••••

•

•••

13

Diodes·······

··

················

·

·5

Va

ristor····

·····

.....

..

.......

1 (

temperature

co

mpensating

)

ACCESSORIES

In

cluded

with

HA-310A

1

hand

strap

8 99.6258

battery

cells

1

transmit

c

rystal

ch

anne

l 10

1 receive

II

1

instruction

m

anua

l

Optional

Low

impedance

dynami

c

earphone

R

eceive

and

transmit

c

ry

sta

ls for c

hannels

1-23

External

power

supply

(117

volts

AC

input

12

volts

DC

output)

2

www.SteamPoweredRadio.Com

LICENSING REQUIREMENTS

You

are

not allowed to

transmit

unless you

are

licensed by

the

FCC

either

as

an

individual licensee

or

operating

as

an

additional

station

under

the

license of a

station

that

has been

granted

' permission by

the

FCC

for additional stations. Please refer

to

FCC

Rules

and

Regulations

*Part

95

section 95. 87 also

Form

505

Item

8.

When

you receive

your

license, fill

out

TRANSMITTER

IDENTIFICATION

CARD.

F;ORM

452-C,

and

affix

same

to

the

rear

rover.

*Avail

ab

le by

sending

$

1.

25

to

the

Superintendent

of Documents,

Government

Printing

Office,

Washington

25

D.

C.

.

and

requesting

Vo

l

ume

Vl of FCC Rules

and

Regulations (

which

include,-

Part

95) .

BATTERY

INSTALLATION

Using

a coin as a screw rlriver,

turn

the

large

rear

cover

ho

l

ding

screw

in a

counter-clockwise

direction

and

remove

the

cover. •

Pry

off

the

snap

connector

attached

to

the

battery

holder

and

remove

the

empty

holder. I

nsert

the

8

1.

5 volt

penlight

battery

cells as indicated gra-

phically in each

compartment

of

the

hairier.

Note

that

the

negat

ive

end (case)

of

each cell

makes

-

contact

with

a

spring

.

When

inser

ting

a cell,

always

insert

this

end

first

into

the

compartment,

then

the

other.

When

all cells

have

been insertecl in

the

ho

lder,

'ltt'lch

the

snap

connector

and

install

holder

into

place. Replace

rear

cover

and

fasten

screw

BATTERY

METER

To

check

the

batteries. simply switch

the

unit

on

(recei,·e mode) .

The

meter

pointer

will indicate in

the

green

area

fo_r

good batteries.

white

area

for doubtful

or

weak

batteries

and

if

the

pointer

indicates in

the

red

area,

the

batteries

shou

ld be replaced.

IMPO

R

TA

T:

Do

not

leave

weak

or

exhausted

batte

ries

in

the

holder, especially if

unit

is

not used

or

stored

for a l

ong

period of

ti

me

as

chemical

action

of

weak

or

exhausted

batter

ies

may

cause

possible

damage

to

battery

holder

or

compartment.

3

OPERATING INS

TRUCT

IONS

Do

not

attempt

to

transmit

until

you recei,·e

vour

license from

the

FCC.

EARPHONE JACK

BATTERY

METER

SQUELCH CONTROL

AND

ON

OFF SWITCH

VOLUME CONTROL

AND

POWER

ON

/OFF SWITCH

PUSH

-

TO-TALK

BUTTON

Fi

g.

I

EXTERNAL

ANTENNA

JACK

TELESCOPING

ANTENNA

SPEAKER !\1ICROPHONE

CHA:--J

:--JEL

SELECTOR

EXTE~AL

POWER JACK

CHARGER

JACI<

1.

Extend

the

telescoping

whip

antenna

to

its full

length.

Avoid

bending

.11e

slim,

top

section

of

the

antenna

when

extending

or

col

lapsing

it.

To

extend

the

antenna,

grasp

the

button-shaped

tip

and

extend

the

antenna

partially.

Next.

grasp

the

center

sections

and

extend

the

l

owe

r sections fully.

Extend

the

top sections by

pulling

gently

on

tip.

To

collapse

the

antenna,

grasp

the

center

sections

and

collapse

the

lm,xer sections first.

then

the

remainder,

with

slim

top

section

pushed in

by

pressing

on

the

tip

with

the

index finger.

2.

Turn

VOLUME

control

in a

downward

direction

. to

switch

unit

on.

Set

the

SQUELCH

control

to

the

fu

ll

y

"open"

position initially

(upward),

and

increase

volume

until

background

noise is heard.

Set

channe

l

selector

to

desi,ed

channel

(remember,

the

unit

is

originally

4

www.SteamPoweredRadio.Com

supplied

with

cr\'stab

for

operation

on

ch,

mn

el

l0onl

y,

u,uallv

in the

A section). ·

3.

The

HA-310A

i,

equipped

with

;1

l·ombined

speaker

/microphone

which

is

lol·;ited behind the

gr

ille

011

the

unit.

To

transmit.

hold

the

unit so

th;1t

t)1e

grille

is

:~

to

5 inches ;iw;iy from vour lips

and

fulh· depress

the

push-to-talk

button.

Sp

e;

1k

dearl\'

and

at

a

n()rmal l

e,

·el.

Wh

en

you

han

'.

comp

leted

your

message, release

the

bu11<J11.

:,-.;oTE:

When

one unit

is

transmitting.

it

i:s

not possible for thi~

unit

to

hear

an\

·

mes,ages

directed

to

it. Do not,

therefore,

attempt

to talk until

the

other

station

has finished

transmittin

g.

4.

ThE'

squelch circuit in

the

recei,·

er

section of

the

transcei,·er

1s

used to e

liminate

;11111<>,·ing

background

noise

when

110

signals

are

present.

To

adjust

the

SQUELCH

control

properly

during

reception,

turn

up

VOLUME

until bac

kground

noisj:'

is heard(no signals

should

he

present).

Rotate

the

SQUELCH

sl

ow

ly

downward

until

the

back-

ground

noise just disappears,

then

roli1te

slightly

further.

At

this

point,

th

e recei,·E'r will

he

quiet between

transmitters,

but a trans-

mitted

signal will

overcome

the

squelch action

and

be heard. Do

not a(h-i!nce

the

control

too far

or

some of

the

weaker

signals will

not be heard.

If

you wish to receive

extreme

ly

weak

signa

ls

or

disable

th

e squelch circuit, simplv

turn

the

cont rol to

the

fully

upward

position.

CHANNEL SELECTOR

This

switch

enable

s you to select

one

of

three

frequencies of opera-

tion. In

one

position, position A is

selected;

in

the

other

positions.

either

B

or

C

is

selected.

The

actual

channels

on

which

th

e

unit

is

able

to

operate

are

determined

by

the

frequen

cies

of

the

c

ryst

als

inserted

in

the

unit.

As

mentioned

previously,

most

units

are

equipped

with

crysta

ls for operati

on

channe

l 10

inserted

in

the

"A"

position.

If

you

decide to

insert

additiona

l

crystals

for

the

other

channels,

a

record

should

be

kept

of

the

channe

l

and

its

correspon

ding

position

in

the

trans

ceiver to avoid confusion

when

using

the

channel

selector

switch.

5

OPERATING RANGE

The

HA-310A

has

been

factory-adjusted

to

provide

optimum

perfor-

m::!nce. Its

operating

range

will

vary

with

surrounding

conditions

and

will

genedly

fall

into

one

of

the

following

categories:

ADVERSE

CONDITIONS

(In

or

around

buildings,

with

poor line-

of-sight

)

--

Under

such

conditions

range

may

be

restricted

to several

hundred

yards.

NORMAL

CONDITIONS

(

Line-of-sight

conditions,

with

few

inter-

vening

obstacles) - -

Range

may

extend

up

to

1

mile

or

more.

FAVORABLE

CONDITIONS

(

Ove

r

flat

terrain

with

no

obstructions

and

no

interference

or

noise)

--

Range

may

extend

up

to

severa

l miles.

FREQUENCY OF OPERATION

The

HA-310A

transceiver

may

be

operated

on

channels

I

to

23

in

the

27

MHz

Citizens Band.

Both

re

c

eiver

and

transmitter

are

ciystal-

controlled

,

and

are

normally

equipped

with

channel

10

crystals

unless

otherwise

ordered

.

Additional

matched

pairs

of

crystals

(

transmit

and

receive)

may

be

ordered

for oper

ation

on

other

channe

l

s.

Note

that

the

c

rystal

in

the

receiving secti

on

of

the

HA-310A

is used

for

the

osc

illator

and

is

therefor

e

455KHz

l0wer

th

an

the

actual

fre-

quency

of

operation.

However,

when

ordering.

you need

only

specify

the

stock

number

and

channel

for

which

crystals

arl! required.

ADDING

NEW

CHANNEL

CRYSTALS

To

insert

additional

crystals

in

the

transceiver,

simply

remove

the

back cover (

one

large

screw

)

and

in

sert

the

new

crystals

in

the

places

shown

in

Figure

2.

IMPORTANT:

Be

sure

to

insert

the

receiving

(R)

and

transmitting

(T)

crystals

in

their

proper

loc

ation.

If

their

positions

are

reversed,

the

HA-310A

will

transmit

on

one

frequency

and

receive

on

another,

both

of

which

will be

outside

the

Citizens

Band.

6

www.SteamPoweredRadio.Com

R

R[CEIVING

CRY

S

TAL

T.

IRANSMllllNG

CRYSTAL

R: R

[CEIVING

CRYST

AL

T:

TRANSMITTING

CRYSTAL

Fig

. 2

CRY

ST

AL

CHART

CHANNEL

!

FREQ

CMC.)1

FREQ

. (MC.) C

HANNEL

FREQ. (MC.) FREQ. (MC.)

TRANSMIT

RECEIVE

TRANSMIT

RECEIVE

U.

S. 1

CANADA CRYS

TAL

CRYSTAL

U. S.

CANADA

CRYSTA

L

CRYSTAL

I I I 26.965

26

.

510

13 JO

27

. I15 26.660

2 26.975 2

6.5

20

14

11

27.

1

25

26.670

3 I

26

. 9

85

26.530

15

I

12

27

. 1

35

26.680

4 1 I

27.

005

26

.5

50

I

16

13

27.

1

55

26.

700

5 2

27

.0

15

26

.5

60

17

I

14

27.

1

65

26.

710

6 I 3 I 27.025

26

.

570

18 15

27.

1

75

26.

720

I

7 I 4 I 27.035 I 26.580

11

19

16

27.

1

85

26.

730

I

8 5

27

.

055

26

.

600

20

17

27.205

26.

750

9 6

27

.

065

26.610

21

18

27.215

26.

760

I

JO

7 27.075 26.620

22

19

27.225

26.

770

-~

11

8

27

.

085

26

.

630

23*

27.255 26.800

~

12

9

27.

1

05

·

26

. 650

Although

receive crystals

are

0. 455

MH

z l

ower

than

transmit

crystal

s,

the

receiver

and

transmitter

both

tune

to

the

channel frequency s

hown

in

column

"FREQ.

(

MHz

)

TRANSMIT

CRYSTAL

"

"'Channel

23

is

shared

with

ot

her

Radio Services, including Class C

radio control.

7

I

BATTERY

REPLACEMENT

When

batte

ry

replacement

becomf's n

i>

,f'<ssary,

any

of

the

batteries

listed may be used.

MFR'S

NO

. I STANDARD I ALKALINE I

MERCURY

I

DRY

CELL CELL CELL

LAFAYETTE

99

-

6258

33

-

150

5 I

33

-

1450

JIS

UM

3,

U

M3

A .. . . . . . . . ..

.......

EVEREADY

915

E-

91

I E-

9,

E502

BURGESS

z

AL9

HG9

RCA

vs

034

vs 1

334

I vs

313

RAY-O-VAC

7 R or 7

LP

I I

SM

MALLORY

I M- 1

5F

MN

- 1

500

ZM

-

9,

DM-9 N

MERCURY

CELLS, which

offer

the

long

est life, have opposite pola-

rity

to

standard

or

a

lkaline

cells

and

MUST

BE

INSERTED

IN

THE

BATTERY

HOLDER

IN

THE

OPPOSITE

DIRECTION

TO

THAT

OUTLINED

IN

THE

HOLDER.

EARPHONE OPERATION

If

you wish to use

th

e earph

one

for private

listening

,

si

mply plug

it

into

the

small jack

at

the

top

of

the

unit

.

This

will a

utomati

cally

cut

off sound

from

the

speaker.

OPERATION

ON

117

VOLTS

50/60

CYCLE

AC

The

HA-310A

ma

y be

operated

from 117 volts 50/60 cycle

AC

when

used

with

an

AC

adaptor

(

availab

le as

an

opt

ional accessory at

ext

ra

cost). Altho

ugh

this restricts mobility to a

certain

extent,

it does

provide

battery

conservation

in those cases

where

one

unit

is used

as

a base station.

The

HA-

310A

is equipped

with

a special jack

at

the

side

into

which

the

AC

adapto

r plug is inserted for AC operati•Jn.

SERVICE

AND

MAINTENANCE

If

trouble

is experienced

with

the

unit

, we reco

mmend

that

you

check

the

following:

1. Check

battery

for

weak

or

discharged condition. Replace if

necessary.

8

www.SteamPoweredRadio.Com

2.

Make

sure

the

channe

l selector is

set

to

the

position in which

crysta

ls have been

inserted

(

The

unit is

normally

supplied

with

crystals

in position A

only).

3.

If

trouble

is experienced

with

transm1ss1on,

make

sure

you

are

depressing

the

push-to-talk

button

fully. Also,

the

antenna

must

be fully

extended

for proper operation.

4.

Make

sure

cr

ys

tals are firmly seated. Check

the

frequencies

or

channel

markings.

Make

sure crystals (T

&

R)

are

inserted

tn

their

proper positions

and

not reversed.

5.

If

checks above

fail

to

disclose the trouble, do

not

attempt

repairs

or

adjustments

yourself.

The

unit

should be serviced

only

by a

qualified radio technician.

Whenever

possible, we

recommend

that

you

return

a defective

unit

to

the

store

from which

it

was

purchased.

RETURNING

THE

UNIT

FOR

SERVICE

In the

event

that

repair

is

necessary

[either in

or

out of

warrant

:·

],

we

recommend

that

you

return

the unit to the

store

from which it

was purchased.

In

most

cases,

this will be your

fastest

and most ef-

ficient method of obtaining

service

.

If

you wish to ship the unit to our main

service

center,

please read

the instructions whic.h follow.

SHIPPING INSTRUCTIONS

Pack

the unit

very

carefully

to avoid damage in transit,

preferably

in

its original carton.

If

the

original

carton

is not available, use a

sturdy

carton

with

at

least

3 inches of shredded

paper

or

excelsior

around

the unit. In the

latter

case,

wrap

the unit

in

paper

first

to avoid

particles

of packing

material

getting

into it. Include with the unit a

letter

explaining

exactl

y what difficulties you have

encountered

[re-

member

to add

extra

First

Class postage and indicate on the outside

of the

carton

that

First

Class Mail

is

enclosed]. Ship by

prepaid

ex-

press

if possible and

mark

ELECTRONIC

EQUIPMENT-

FRAGILE

.

Clearly addr

ess

the

carton

as

follows:

SERVICE DIVISION

LAFAYETTE RADIO ELECTRONICS

CORP

.

150

Engineers

Road

Hauppauge,

L.

I.,

N.

Y,

11787

n

www.SteamPoweredRadio.Com

0

LOAOING

COIL

0 L - 4

/Jf/fi!11l1/11rr1111111tllriJ

11

I/

I

Ii!

111 I 11

11,

ill1pll!1

11

1! -

1 / j / j I I

J,~

t1

~~

I I

111

[,~l

~

-':\l

1

BATTERY

CLIP

03

2SC183

04

2SC183

T-C

~}J

@-1

--t,

\ .

,.

, • (;;)(

C27

-s::J

-

05

\_,/e::::,

R5

~

~~

L- 5

~~

CfD~

·b

~.

•

ID

R4

CHANNEL

SWITCH

0

PWR

.

CHG

.

JACK

GQ

~}~

q}~

GQ

05

2SC183

R52,£65 r

~

l - 2 .

@)

'.)

RF

.

FINAL

STAGE

DC

INPUT

POW

.

ER

TEST

POINT

• P. C.8.

RETAINING

SCREW

Figure 3.

:,

#11

TO

AIITEUA

!:

..

9,

·r-

'~'f

st'

;_~-

~,)

141

,...~

_ ,·-

~-±-

,,,;m ,r··' t

;-

--')

•••

--;-,--,

,

••

'

,--,~7',f-1

137

;;',, '

<''

'"'

,,-,1

C42

i

,'

,,,

~('

ti4,

',

+ \ _

'!3fO

:

(\'t']'

t'i,

',q

i-I

,'

+

',

:]

011

,,

"

,,

USE

::

:

#JO:

-----

---;,_

;:

:-

;.,

>,

,v::,--•:·<t\,

- , '

_,J,J,

kst

,,_,

,~'\'t,~~

•e'·-{

T-

•

J-'

•~-,

,.,,-

,,,-~-

,-'

,,

' '•·.

·•·

:</

~;;It<:

•:;,

.

)~•

!51

.--,i,

,'

~

,1®

;,

~:/'-~~~m

,

t,

(~,:_3/~\

_,

~)

~,

.,•

r

_,

_.

,"·''

•m

:::.,

r~j

'-i'?i,

-

1

,:?•)l't

)

_:--·

'u.-;-",-dtf' !-' ~ -

-

-,:Js.

*C33r

·

---::

_

1

!

...

')J'C.

~31 :

ti

'ot._

_,.

;

r-s-·,

)

4~1

>'-,

~}

§.!,

::

___

,11

, ,

l1J

''

·~

·-,

--~.<:'"._~~

¢'.t;

~~

-~'

R?H

·,

,.,

..

,.

iiSII ~

JK

'

lJ

V

-

~1

~

R21

~

0

R56

/if

J ~ &

~~

R18

"'~

~~R2~

YR

- 3 /

01

2SC605

,,.--

-----,

,.

•.

, T-1 1

{',

Mt

1

Iii',

h -,1

:\1

1

tJu

1

--"-

~i1

, ,__

_____

! ,) J .

~~;-.f11f,

...

,f!-~-'t

ii

;~j_:

u,.t~c

":"I•-.-,~;

•,_,

1t4

.

#2(

~

1145

,

i:,.'

©• 1 C

_,

:-

,

~B

~ I

(};1;;--

R$1

1.,J 1

"t,

l{G,

\2,'-.

Jpt '.,,.._

;fc

=~

-,

(j

,;

[~~--:;

:}!!~:'$

"',

'.J-----.{.;i;

_.

,-•.Rff',

,-

..

· L

••

•

r~

r~•,,:s-·

'.':'¾,.'

; l

~

"'

1

itra5~,R2

5

1 · ".' -

~t-f_:-:~=

~

_,.,.

Q

L.,

'•r

l,,~_

-

__

j

l

(ft:)

,,

,:

=----

_----·

--_-

_-_-_._.

__

._

..

_.

;~~-==--~------·====-)~

T-

8

OUTPUT

TRANS

PRI

MARY

TOQ9

(PIN)3

(PINI

TOQIO

(PIN)

SE

CONDRY

c--°(PIN)

TO

SPEAKEk

~

IPINI

C

IWHITE)

(GREEN)

S-\C

Figure

-4.

PUSH-TO-TALK

SWITCH

(BOTTOM

VIEW)

,--..J..-_:--..:_,_7

:

~l'tiEl7:

: [}oQwOu I

.,JiiJ.,_J

:

tlitH'l7:

□~□

□

=:

,--,

I .,i I

.,J

:

i Q

-.\

L_[_-~r_J

1:

\.

_..:....1

___)

c

__

J

CENTER

r

c!,r

I

TRANSMIT

RECEIVE

QB

2SC815

06

2SC183

J- 3 1- 4

www.SteamPoweredRadio.Com

I R46

15

K

jANT.j

J-1

IT,L

IEXT

.

ANT.I

S2·

b

DSC

Qll

2SC815

s 1- a

RF

AMP

Ql

2SC605

(

R3

470

.P.

+

C26 C

27

+

10,.../iov

103/is

v

R36

220l.1

RF

AMP

Q12

2SC815

PUSH-TO-TALK

SWITCH

CHANNEL

SWITCH.

MIX

Q2

2SC183

R23

2

.2

K

R28

I

K

C58

SOP

C59

r33P

R52

4

7.Q

C

57

33P

TP6

RF

POWER

AMP

Q13

2SC781

SCHEMATIC

DIAGRAM

IF

AMP

IF

AMP

Q3

2SC183

Q4

2SC183

DET

ANL

Rl8

03

4.7K

S0

-46

C22

0.02

.1..

Rl5

R

l6

I

4.7

K

.Q

Tfr

3.3K

R24

SQUELCH

22K

SQUELCH

Q6

2SC183

VOLUME

S4 s

1-b

+

C62

o-----l

D4

f

V-

24

R3

1

5.6K

VR

-2

1

-"lso

v

50KO.- B

+

S

·-

3

S-

4

C43

33..u/isv

VR-

4

SK

AF

AMP

Q7

2SC183

AF

AMP

QB

2SC815

POWER

S

WITCH

WITH

VOLUME

CONTROL.

SQUELCH

S

WITCH

WITH

SQUELCH

CONTROL.

C65

0.047 s 1

-e

0

AnOWER

-

AMP

Q9,

QlO

2SC968

X2

T

P2

VR-

1

5K'1. -T

!VOLUME

I

m

l'"

0

ls~1cl

(,

( ' >

www.SteamPoweredRadio.Com

ANT

RF

AM

P M

IX.

QI

2SC

605

Q2

2SC

I

83

w

RF

PO

WE

RAMP

RF

AMP

0

13

2SC

781

Q

!2

2

SC

815

BLOCK

DIAGRAM

IF

AM

P

Q3 2

S<:18

3

OSC

.

Q

I!

2

SC

815

IF

AM

P

Q4

2SC

l83

SQ

UE

LCH

SPEA

K

ER

DEI Q6

2SC

!83

02 SD-

46

:r9,

SQ

. V

OL

SQ

ON/OFF

AF

PO

WER

AM

P

I

Q9

,

!0

2SC

96

8

X

2

R

AN

GE

BOOST

PO

W

E.R

+1

ov S

WIT

CH

EXT

~

PO

W

ER

~

J

80

0~

-

I

J_

8p

cs

l

CHA

RGER

0

Lafayette HA-310A User manual

Popular Two-way Radio manuals by other brands