Kenwood TH-225A User manual

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ПООЛ\МАЗЯ

144MHz

FM

TRANSCEIVER

TH-225A

INSTRUCTION

MANUAL

KENWOOD

CORPORATION

Downloaded

by

RadioAmateur.EU

CPRINTED

IN

JAPAN

B50-8334-00(K,

PIT)

9012110987854321

89/21110

‘Thank

you

for

purchasing

this

new

transceiver.

IMPORTANT

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

in

service.

SAVE

THIS

INSTRUCTION

MANUAL.

Under

normal

circumstances,

the

transceiver

will

operate

in

accordance

with

these

operating

instructions.

The

tran-

sceiver

was

preset

at

the

factory

and

should

only

be

read-

justed

by

a

qualified

technician

with

proper

test

equipment.

Attempting

service

or

alignment

without

factory

authoriza-

tion

can

void

the

transceiver's

warranty.

CAUTION:

E

e

Long

transmission

or

extended

operation

in

tho

6

watt

mode

might

‘cause

the

rear

of

this

transceiver

to

get

warm.

Do

not

place

tho

transceiver

where

the

heat

sink

(rear

panel)

might

come

in

contact.

with

plastic

or

vinyl

surfaces.

Use

of

an

external

antenna

for

fixed

station

is

recommended.

FCC

WARNING:

This

equipment

may

generate

or

use

radio

frequency

ener-

ду.

Changes

or

modifications

to

this

equipment

may

cause

harmful

interference

unless

the

modifications

are

express-

ly

approved

in

the

instruction

manual.

The

user

could

lose

the

authority

to

operate

this

equipment

if

an

unauthorized

change

or

modification

is

made.

CONTENTS

ACCESSORIES

..

SPECIFICATIONS

BATTERY

PACK

Ni-Cd

battery

Recharging

the

battery

pack

Manganese/Alkaline

batteries

Operating

time

CONTROLS

AND

FUNCTIONS.

OPERATION.

Receive

Transmit

Frequency

selection

Repeater

operation

Transmitter

offsets

Reverse

function

Tone

operation

‘Auto

patch

operations

...

Scan...

Beep

tone

Memory

...

Memory

channels

Memory

entry

Memory

recall

Odd

Split

memory

channel.

Memory

channel

lockout

Clearing

a

specific

memory

channel

Clearing

all

memories.

Memory

back-up

battery

Priority

alert

channel

check

Battery

saver

16

MAINTENANCE........

In

case

of

difficulty

Service

OPTIONAL

ACCESSORIES...

Programmable

tone

decoder

unit

TSU-4

BLOCK

DIAGRAM..........—.

SCHEMATIC

DIAGRAM

ACCESSORIES

Unpack

your

transceiver

carefully

and

cor

that

itis

sup-

plied

with

the

following

accessories.

Antenna

for

144

MHz.....T90-0352-05,

Rubber

cap..

Belt

Ноок.........

Machine

Screw

..

Spring

washer.

Ni-Cd

Battery

pack

(РВ-12)..........

-W09-0541-05..

Battery

charger

(120

V)

..W09-0517-05

DC

cable

(PG-2V)

Е30-2078-25

Instruction

Manual

.........850-8334-XX

..

Warranty

Card...

Ré

-

SPECIFICATIONS

FREQUENCY

RANGE

(Mb

=

чакооо-—

таз:

MODE

[377

OPERATING

TEMPERATURE

EIN

ANTENNA

IMPEDANCE

ET)

POWER

REQUIREMENT

BATTERY

PARK

E3

V-15

VOC

(12

VOC

запі

3.

DCN

22

V=16

VOC

013:8

VDC

nominal)

E.

DTRASWTMODE

возм

Less

than

13A

&|

{4

[Low

mansur

море

os

w

noa

Lees

thn

0.7

25

[теме

mone

ите

no

cna

Е

Apoc

60

mA

BATTERY

SAVER

MODE

А.Т

6)

Арек

1

mA

DIMENSIONS

СТГ

ИН

DITE

й

(PROJECTIONS

CLUDED)

70%

198%

40

imm

жент

With

Ме

Са

batter

and

апы

OUTPUT

POWER

We

зво

[win

Po

wh

PET

Ё

With

РВ-2

-

With

Раз

PEE

H

"

um

$

[mouar

—

—

©

[

MAXIMUM

EREGUENCY

DEVIATION

SPURIOUS

RADIATION

S

L'oncumv

DOUBLE

CONVERSION

SUFERHETERGOYRE

INTERMEDIATE

FREQUENCY

reg

=

тєзмнє

&

ЕТТ

FT

§

sms

—

1248

SAD

-

‘oe

than

0217

8

|

saveton

sensu

Lane

than

0.1

AV

Е

захотите

а

Moe

than

12

Ki

ET

Lose

than

24H

‘AUDIO

OUTPUT

POWER

lass

8

oad

10%

dto

Mor

than

800

mW

NOTE:

Circuit

and

ratings

are

subject

to

change

without

notice,

due

to

development

in

technology.

Downloaded

by

RadioAmateur.EU

ВАТТЕВҮ

РАСК

Installing

the

battery

pack

Match

the

concave

part

at

the

bottom

of

the

radio

10

the

convex

part

at

the

top

of

the

battery

pack.

Turn

the

battery

pack

clock-

wise

until

it

clicks.

Be

sure

the

pack

and

trans-

ceiver

are

locked

together.

g

Pressing

the

battery

release

button,

turn

the

battery

pack

counterclockwise.

Ni-Cd

BATTERY

PACK

(РВ-12)

quire

several

charge/discharge

cycles

before

you

can

expect

to

see

ing

period

between

charges.

If

the

battery

will

y

than

2

months

it

should

be

recharged

before

RECHARGING

THE

BATTERY

PACK

Insert

the

charge

plug

from

the

supplied

Battery

Charger

into

the

receptacle

on

the

rear

of

the

battery

pack.

Then

plug

the

Charger

into

the

AC

line.

The

LED

on

the

Charger

wil

iluminate

to

show

that

the

pack

is

charging.

The LED

will

remain

on

эв

long

as

the

Charger

is

connected

to

the

AC

power

source

and

the

battery,

indicating

that

the

pack

is

still

being

charged.

Do

not

allow

the

battery

to

charge

for

greater

than

15

hours.

The

useful

Ме

and

battery

performance

will

be

reduced

if

you

exceed

the

recommended

charge

period.

NOTES:

M

————

ө

Turn

off

the

power

switch

before

charging

Recharging

should

be

de

ап

ambient

temperature

bet-

ween

10°C

~

40°C

(50°

Р).

Recharging

performed

out

of

this

range

fully

charge

the

battery.

MANGANESE

or

ALKALINE

BATTERIES

Load

6

x

R6

(AA)

manganese

or

alkaline

batteries

in

series

in

the

sup-

plied

battery

case.

(Be

sure

to

ob-

serve

the

polarities.)

(We

recommend

‘use

of

high-

perfomance

manganese

batteries.)

Battery

pack

(1)

can

be

inserted

to

the

case

(2)

only

in

a

specific

direction.

Check

the

shape

(top

and

bottom)

after

moving

the

stopper

on

the

rear

side,

then

insert

the

battery

correctly.

Inserting

the

battery

by

force

without

checking

the

shape

may

damage

the

case.

OPERATING

TIME

Bart

vote

resin.

I

Е,

=

үсе

M

АҒ

OUTPUT.

0.35

wis

0

ааа

à

E

Туена

5

argen

ШД

n

э

55 59

Tus

zip

aa

Manganese

battery

(except

Alkaline

manganese

battery)

is

suitable

only

for

LOW

power

transmission.

harge

the

Ni-Cd

battery

pack

when

the

BATT

indicator

on.

We

recommend

use

of

the

PB-3

or

PB-4

Ni-Cd

battery

pack

for

long

transmission

or

extended

operation.

CONTROLS

AND

FUNCTIONS

@

Antenna

connector

‘This

jack

is

used

to

connect

the

supplied

antenna.

Twist

to

lock

with

the

BNC

connector.

(2)

DC

IN

terminal

This

terminal

is

used

for

an

external

power

supply.

Input

voltage

is

13.8

VOC

nominal.

The

center

is

the

(+)

side

and

the

sleeve

is

(—)

side.

You

should

turn

the

power

switch

OFF

when

connecting

this

terminal,

Pay

attention

to

the

polarity.

®-®)

CAUTION:

—

—

——

Asa

precaution,

do

not

remove

the

bat-

tery

pack

when

an

external

power

sup-

ply

is

used.

Use

the

KENWOOD

PG-2V

ог

PG-3E

optional

cable

for

the

con-

i]s

@

MIC

jack

This

jack

is

used

for

connection

of

an

external

microphone.

The

use

of

an

electret

type

microphone

is

recommended.

Input

impedance

is

2

КЇ

and

the

DC

voltage

on

this

terminal

isav.

(3)

SP

jack

This

jack

is

used

for

an

earphone

or

external speaker.

The

recommended

impedance

is

8

0

nominal.

©

TONE

switch

This

switch

is

used

to

activate

the

sub-audible

tone

encoder.

©

нж

YLOW

(

~

)switch

This

switch

is

used

to

select

the

transmit

output

power.

©

SQL

control

The

SQL

control

is

used

to

eliminate

noise

during

no

signal

periods.

Normally,

this

control

is

adjusted

clockwise

until

the

noise

just

disappears

and

the

BUSY

indicator

goes

OFF

(Threshold

level).

For

scan

operation,

this

control

must

be

set

to

the

threshold

point.

When

an

incoming

signal

is

weak

or

unstable,

readjust

the

squelch

for

optimum

reception.

For

tone

squelch

operation

with

TSU-4,

this

control

must

be

set

to

the

T.SQ

position

(8)

VOL

control

Volume

control

with

power

ON/OFF

switch.

(8)

MONITOR

switch

Pressing

this

key

will

open

squelch.

(9

PTT

(Push

To

Talk)

switch

For

transmission,

press

this

switch

and

speak

into

the

microphone.

@

RELEASE

button

Used

to

release

the

battery.

Depress

this

button,

and

turn

the

battery

counterciock

@

LAMP

key

key

controls

the

lamp

on

the

LCD

display.

@

OFFSET/F

key

‘The

OFFSET/F

key

is

used

to

select

the

desired

transmitter

offset

for

repeater

operation.

Each

time

the

key

is

pressed,

‘the

mode

cycles

from

+

shift,

to

—

shift,

to

simplex,

and

back

to

+

shift.

When

the

offset

function

is

ON,

the

sym-

bol

+”

or

“=”

is

displayed.

Pressing

the

С

and

the

OFFSET/F

key

in

order

change

the

desired

offset

frequency.

@

R/TONE.

F

key

This

key

is

used

to

reverse

the

transmit/receive

frequencies

used

to

TONE.

F:

TONE

FREQUENCY

кеу

Pressing

the

[EJ]

and

the

R/TONE.

F

key

in

order

is

used

to

change

the

frequency

of

the

tone

encoder.

®

SAVE

ke

The

SAVE

key

is

used

to

select

the

power

save

condition

during

the

receive

mode.

Pressing

the

С)

and

the

SAVE

ke

change

the

battery

saver

on/off

ratio.

SPEAKER

@

MICROPHONE

BATTERY

CASE

in

order

is

used

to

©

Display

900

@

OROK]

©

FREQUENCY

display

Displays

the

operating

frequency.

©

emo

:

ON

when

the

Priority

Alert

function

is

active

Flashes

when

the

channel

is

busy.

:

Displays

the

selected

power

save

соп.

dition;

(КОТО,

SAVE]

for

suto

save

mode,

SAVE)

for

save

mode,

and

no

indicator

Tor

OFF.

@

eusv

ОМ

whenever

the

squelch

opens

dur-

ing

receive.

ON

all

the

time

if

the

squelch

control

is

rotated

counterclockwise,

ond

the

T.SQ

is

off.

©

гендж)

:

ON

during

transmit

modo.

Used

to

indicate

the

relative

receive

signal

strength,

or

as

an

indication

of

transmitting.

:

Indicates

the

selected

frequency

step.

:

Indicates

the

selected

memory

channel

number.

ї

Indicates

for

approx.

5

seconds

after

pressing

the

[7]

key.

plays

the

selected

offset,

minus

or

plus,

and

no

indicator

for

simplex.

:

On

whenever

the

REVERSE

function

is

active.

+

Indicates

for

approx.

5

seconds

after

pressing

the

[Y]

key.

ї

Indicates

the

selected

scan

mode.

Indicates

the

selected

scan

stop

mode.

Flashes

during

scan.

:

Indicates

that

the

transmitter

has

been

disabled

by

the

TX.STOP

key.

:

Indicates

that

all

keyboard

functions.

except

LAMP

key

has

been

disabled

by

the

KEY

LOCK

is

activated.

:

ON

when

the

battery

voltage

falls

be-

low

the

level

for

good

communications.

Recharge/replace

the

battery

pack.

@

DOUBLE

ROLE

KEYS

fis

These

13

keys

except

the

С

and

keys,

have

two

functions.

The

1st

function

is

printed

on

the

key.

The

2nd

function

is

printed

above

the

key.

All

these

2nd

functions

are

active

for

approx.

5

seconds

af-

ter

pressing

the

[£]

key.

©

Numeric

keys:

Г]

-

С,

2)

Theso

keys

are

used

to

select

the

desired

operating

fre-

quency

and/or

memory

channel

number.

Memory

channel

1,

8,

and

9

also

serve

additional

functions

as

discribed

below.

М.

channel

1

is

used

to

store

the

Priority

Alert

channel

formation.

M.

channel

B

is

used

to

store

the

lower,

and

M.

channel

9

the

upper

limit

frequency

for

the

programmable

band

scan.

©

UP/DOWN

keys:

ŒJ

,

ŒI

These

keys

are

used

to

increase

or

decrease

the

operating

frequency,

offset

frequency,

tone

frequency,

or

the

power

saver

circuit

rate.

©

F:

Function

exchange

key

The

С

key

is

used

to

activate

the

2nd

function.

‘The

F

indicator

is

displayed

for

approx.

Б

seconds

after

pressing

the

Z]

key.

СА

You

must

press

the

2nd

function

while

the

F

indicator

is

lit,

or

the

radio

will

perform

the

function

printed

on the key,

rather

than

the

function

printed

above

it.

©

M:

Memory

key

The

[€]

key

is

used

to

select

the

desired

memory

channel.

The

operation

is

similar

to

that

of

the

[Z]

key,

in

that,

the

M

indicator

will

illuminate

for

5

seconds

in

the

LCD

display

CAUTIOI

The

memory

channel

must

be

selected

within

Б

seconds

of

press-

кеу.

©

ENTER

key

The

E

key

is

used

to

enter

a

frequency

selected

by

the

numeric

keys.

*

SCAN

key

The

Ez]

key

is

used

to

start

or

stop

the

scan

function,

©

PRIORITY

CHANNEL

CHECK

key:

[Z]

then

1/PRIO

These

keys

are

used

to

monitor

whether

the

priority

chan-

nel

(CH

1)

is

busy

or

not.

When

this

function

is

activated,

the

radio

will

switch

to

CH

1

approximately

once

every

10

seconds.

To

cancel

this

function,

press these

keys

ag:

[27

then

2/ВЕЕР

Each

time

these

keys

are

pressed,

the

audio

annunciator

will

be

turned

ON

or

OFF

alternately.

©

(FREQUENCY)

STEP

key:

[Z]

then

3/STEP

Each

time

these

keys

are

pressed,

tho

frequency

scanning

step

size

will

be

increased

5

kHz.

Several

different

scan

function

keys

and

scan

stop

keys

are

provided.

*

BAND

SCAN

key:

[Z]

then

4/8AND

*

MEMORY

SCAN

key:

[Z]

then

5/MEMORY

©

PROGRAMMABLE

BAND

SCAN

key:

[©]

then

S/PROGRAM

©

SEEK

OPERATED

SCAN

key:

[Z]

then

7/SEEK

TIME

OPERATED

SCAN

key:

[7-]

then

8/TIME

*

CARRIER

OPERATED

SCAN

көу:[7_]

then

S/CARRIER

For

additional

information

on

this

function

refer

to

page

14.

*

TX.

STOP

кву:

[7]

then

M/TX.

STOP

Pressing

these

keys

will

prevent

accidental

transmission.

To

cancell

this

function,

press

these

keys

agai

*

KEY

LOCK

key:

[Z]

thon

ENTER/KEY

LOCK

Depress

these

keys

and

the

frequency

and

other

settings

will

remain

unchanged

by

keyboard

operation

except

the

LAMP

key.

To

cancel

this

function,

press

these

keys

again.

*

FAST

СО]

key:

С]

then

V/FAST

*

FAST

[2].

key:

[7]

then

A/FAST.

©

LOCK

OUT

key:

[7]

then

O/L.OUT

Each

time

these

keys

are

pressed,

the

Memory

channel

lock

out

function

will

be

turned

ON

or

OFF.

OPERATION

Ш

RECEIVE

After

power

and

antenna

connections

have

been

completed,

set

the

switches

as

follows:

1.

Turn

the

VOL

control

clockwise

to

turn

on

power.

The

frequency

on

the

LCD

display

will

show

the

transceiver

is

operating.

2.

As

the

VOL

control

is

turned

clockwise,

either

back-

ground

noise

or

a

QSO

will

be

heard.

3.

To

eliminate

the

no-signal

noise

turn

the

SQL

control

clockwise,

4.

Enter

the

desired

frequency.

18

TRANSMIT

Precaution:

Check

the

intended

transmit

frequency

before

operating

to

prevent

interference

with

other

stations.

If

you

are

using

T.

SQ

(Tone

Squelch)

press

the

MONITOR

key

to

allow

the

Squelch

to

open.

1.

Simply

depress

the

PTT

switch

and

the

E]

indicator

will

light.

2.

Speak

into

the

microphone.

Recommended

distance

to

the

microphone

is

approximately

2

inches

(5

cm).

CAUTION:

Lm

Long

transmission

or

extended

operation

in

the

6

watt

mode

might

‘cause

the

rear

of

this

transceiver

to

get

warm.

Do

not

place

the

transceiver

where

the

heat

sink

(rear

panel)

might

come

in

contact

with

plastic

or

vinyl

surfaces.

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by

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