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GOO/ANAD

HF

TRANSCEIVER

TS-4405

INSTRUCTION

MANUAL

KENWOOD

CORPORATION

Thank

you

for

purchasing

the

new

TS-440S

tran-

sceiver.

Please

read

this

instruction

manual

carefully

before

placing

your

transceiver

in

service.

This

unit

has

been

carefully

engineered

and

manufactured

to

rigid

quality

standards,

and

should

give

you

satisfactory

and

dependable

operation

for

many

years.

The

following

explicit

definitions

apply

in

this

manual:

Note:

If

disregarded,

inconvenience

only,

no

risk

of

equipment

damage

or

personal

injury.

Caution:

Equipment

damage

may

occur,

but

not

per-

sonal

injury.

1.

This

Instruction

Manual

covers

the

TS-440S,

with

and

without

AT

(Automatic

Antenna

Tuner)

unit.

When

there

are

differences

in

operation,

separate

instructions

will

be

given

for

each

model.

Illustrations

show

the

TS-440S

with

AT

unit.

.

In

the

U.K,

the

TS-440S

is

available

under

the

brand

name

‘TRIO’.

The

TS-440S

with

KENWOOD

brand

appearing

in

this

instruction

manual

is

not

sold

in

the

U.K.,

as

they

are

made

to

a

different

market

specification.

N

CONTENTS

1,

FEATURES....

2.

INSTALLATION

2-1.

PRECAUTIONS

2-2,

FIXED

STATION

2-1,

interconnection

-2-2.

Grounding

.

2

2

-2-3.

Antenna.

'-2-4,

Key

connection

2-3.

MOBILE.

2-3-1.

Mounting

bracket

installation

2-3-2,

Power

supply

connection

3.

OPERATIOW.........

3-1.

OPERATING

CONTROLS

3-1-1,

Front

panel

3-1-2.

Rear

panel.

3-1-3.

Top

cove

3-2,

RECEIVE...

3-2-1.

tnitial

setting.

3-2-2.

CW

zero-beat

operation.

3-2-3, Direct

keyboard

frequency.

3-2-4,

AM

reception

TRANSMIT

.

.

SSB

(LSB,

USB)

mode

OOOANTTTGAR

RAR

W

(a)

Semi-automatic

breal

(b)

Full-automatic

break-in

in.

3-4,

AUTOMATIC

ANTENNA

TUNER

3-5.

DUAL

DIGITAL

VFO’s

{c}

SPLIT

switch

(d)

T-F

SET

switch.

3-6.

MEMORY

.

3-6-1.

Memory

entry

.

3-6-2.

Transferring

memory

information

to

the

VFO

3-6-3.

Transferring

data

between

memory

channels

3-6-4.

Entering/Transferring

data

in

the

split

frequency

channels...

3-6-5.

Clearing

a

memory

channe'

3-6-6.

Memory

recall.

3-7.

SCAN........

3-7-1,

Memory

scan

3-7-2,

Program

scan

3-7-3.

Scan

speed...

3-7-4.

Memory

channel

lockout.

3-8.

-AFSK....

3-8-1.

Reception.

3-8-2.

Transmit

3-8-3.

AMTOR

operation

3-9.

OPERATION

WITH

A

LINEAR

AMPLIFIER..

19

2

4.

CIRCUIT

DESCRIPTION

...

4-1,

GENERAL

DESCRIPTION

4-2,

TRANSMITTER

SECTION

4-3,

RECEIVER

SECTION...

.

RF

unit

(X44-1680-00)

IF

unit

(X60-1300-00)..

Controt

unit

(X53-1450.

PLL

unit

(X50-2050-00)

.

.

AT

(Automatic

Antenna

Tuner)

unit

{X67-1150-00)

5.

MAINTENANCE

AND

ADJUSTMENT.

5-1,

GENERAL

INFORMATION

-2.

SERVICE

...

3.

CLEANING.

-4.

IN

CASE

OF

DIFFICULTY

5.

MICROPROCESSOR

BACK-I

LITHIUM

BATTERY

.

MICROPROCESSOR

RESET

.

ORDERING

SPARE

PARTS

.

.

ADJUSTMENTS

1.

Cover

removal.

Internal

views

.

Digital

display

calibration

..

Optional

10 Hz

display

resolution

CW

zero

beat

frequency

selection

..

Side

tone

level

Beep

tone

selectiol

Beep

tone

level

..

Tuning

dial

torqui

-8-10.

Linear

amplifier

control

..

6.

OPTIONAL

ACCESSORIES

6-1.

CRYSTAL

FILTER

INSTALLATION

.........

27

6-2.

VOICE

SYNTHESIZER

UNIT

VS-1

INSTALLATION

6-3.

INTERFACE

IC

KIT

IC-10

INSTALLATION

.......

OTHER

ACCESSORIES

6-4.

9.

SPECIFICATIONS

AND

ACCESSORIES

.

9-1,

SPECIFICATIONS

9-2.

ACCESSORIES

10.

REFERENCE

.....

10-4.

ANTENNA

INSTALLATION

.

»

Fixed

station

10-2.

MOBILE

OPERATION

.

10-2-1,

installation

......

10-2-2,

Noise

reduction

.

10-2-3.

Battery

capacity

4!

10-3.

RADIO

FREQUENCY

ALLOCATION......

46

1.

FEATURES

1.

Wide

dynamic

range

New

advances

in

circuit

design

have

made

a

102

dB

dynamic

range

{500

Hz

IF

bandwidth)

possible.

2.

General

coverage

reception

from

100

kHz

to

30

MHz

In

addition

to

transmission

and

reception

on

all

amateur

bands

from

1.8'to

28

MHz,

the

TS-440S

provides

a

continuous

tuning

general

coverage

receiver

with

a

range

of

100

kHz

to

30

MHz.

3.

Automatic

antenna

tuner

The

optional,

built-in

automatic

antenna

tuner

will

oper-

ate

from

3.5

to

28

MHz.

4.

All-mode

operation

USB,

LSB,

CW,

AM,

FM,

and

AFSK

modes

are

provided.

5.

100%

continuous

duty

transmit

Transmission

at

a

100%

duty

cycle

is

possible

for

rela-

tively

long

durations

(one

hour

or

less)

in

any

mode,

including

FM

and

AFSK.

6.

CW

full

break-in

Full

break-in

operation

is

possibie

in

the

CW

mode.

Rapid

transmit/receive

switching

also

makes

the

radio

suitable

for

data

communications

in

the

SSB

mode,

such

as

AMTOR.

7.

Build-in

XIT

XIT

(Transmitter

incremental

tuning)

allows

fine

tun-

ing

of

the

transmitter

frequency.

8.

Switchable

IF

bandwidth

The

IF

bandswitch

allows

you

to

tailor

the

receiver

bandwidth

to

the

operating

conditions.

Several

selec-

tions

are

provided;

AUTO,

W

(Wide),

M1

(Medium

1),

M2

(Medium

2)

and

N

(Narrow).

When

the

AUTO

po-

sition

has

been

selected

the

radio

will

select

the

opti-

mum

bandwidth

for

the

selected

mode

of

operation.

9.

Switchable

AGC

time

constant

A

switch

is

provided

to

select

either

FAST

or

SLOW

AGC

action.

10.

All

mode

squelch

11.

Built-in

RF

power/SWR

meter

12.

Versatile

frequency

control

Accurate

frequency

selection

is

possible

due

to

the

use

of

a

single

reference

oscillator

circuit.

Continuous

tuning

of

all

frequencies

thru

the

use

of

digital

VFO

technology.

The

basic

10

Hz

step

tun-

ing

rate

is

modified,

according

to

the

selected

mode,

for

optimum

tuning

speed

and

accuracy.

An

auto-

Matic

fast

scan

function

is

also

provided.

Dual,

digital

VFO‘s

(A/B)

enable

crossband,

cross

mode

operation.

400-channel

memory

{including

10

odd-split

chan-

nels}

stores

the

frequency,

band,

and

mode.

Memory

scan

and

two

programmable

scan

ranges,

Direct

entry

of

the

desired

frequency

using

the

front

panel

numeric

keypad

is

also

possible.

A

memory

scroll

function

allows

review

of

the

memory

channel

contents.

Selection

of

the

desired

memory

channel

is

possi-

ble

using

either

the

TUNING

dial

or

microphone

UP/DOWN

pushbuttons.

The

T-F

SET

function

is

useful

for

split

frequency

operation.

An

optional

tone

unit

TU-8

may

be

used

in

conjunc-

tion

with

the

oda-split

memory

channels

to

allow

10:

meter

repeater

operations

with

CTCSS

access.

Optional

computer

interface.

Built-in

long-life

memory

back-up

battery.

2-color

fluorescent

display

tube

indicates

frequen-

ey

and

other

operational

data.

ae

13.

Front

panel

control

of

the

TUNING

dial

torque

is

provided.

2.

INSTALLATION

2-1.

PRECAUTION

.

Avoid

direct

sunlight,

and

select

a

dry,

well

venti-

lated

location.

Since

the

heat

sink

is

on

the

rear

panel,

avoid

piac-

ing

the

equipment

with

the

bottom

and

rear

sides

close

to

a

wall

or

desk.

.

When

installing

the

equipment

in

an

automabile,

en-

sure

adequate

ventilation,

Install

the

equipment

in

N

@

2-2.

FIXED

STATION

2-2-1.

Interconnection

The

TS-440S

requires

more

than

18A

at

13.8

VDC

when

transmitting

at

full

power.

Use

the

PS-50

or

PS-430

power

supply

for

fixed

stations.

Note:

;

The

PS-50

base

station

supply

is

needed

for

continu-

ous

transmission

operation.

PS-50

—_

>

TS-4408

To

antenna

2-2-2.

Grounding

Caution:

Never

use

a

gas

pipe

or

electrical

conduit

pipe.

Notes:

1.

A

ground

connection

that

is

a

1/4

wavelength

or

its

multiple

may

provide

a

good

DC

ground,

but

it

will

not

provide

a

good

RF

ground.

.

A

city

water

pipe

cannot

be

used

as

a

good

earth

in

some

cases,

N

a

location

where

the

rear

does

not

make

direct

con-

tact

with

the

seat,

and

is

not

directly

exposed

to

vibration.

4.

Avoid

installing

the

equipment

in

front

of

the

car

heater

air

outlet.

5.

The

standard

operating

voltage

of

the

equipment

is

13.8

V.

Do

not

operate

below

12

V

or

over

16V.

The

transceiver

can

be

elevated

for

operating

con-

venience.

Caution:

Do

not

use

the

bail

to

carry

the

transceiver.

Making

a

good

earth

connection

is

important

for

preventing

dangers

such

as

electric

shock

and

for

emit-

ting

a

high

quality

signal

with

minimum

spurious

radi-

ation.

Bury

a

commercially

available

ground

rod

or

copper

plate

under

the

ground

and

connect

it

to

the

GND

terminal

of

the

TS-440S.

A

thick

wire,

cut

as

short

as

possible,

should

be

used

for

the

connection.

To

make

a

good

earth

connection,

connect

the

GND

terminal

to

a

grounded

metal

water

pipe.

4

2-2-3.

Antenna

2-3-2.

Power

supply

connection

Cauti

Cautioi

Protect

your

equipment—Use

a

LIGHTNING

AR-

RESTOR.

Any

of

the

common

antenna

systems

designed

for

use

on

the

high

frequency

amateur

bands

may

be

used

with

the

TS-440S

provided

the

input

impedance

of

the

transmission

line

is

not

outside

the

capability

of

the

Au-

tomatic

Antenna

Tuner.

The

transmission

line

should

be

coaxial

cable.

An

antenna

system

which

shows

a

SWR

(Standing

Wave

Ratio)

of

less

than 1.5:

1

when

using

50

ohm

coaxial

transmission

line,

or

a

system

that

results

in

a

transmission

line

input

impedance

that

is

essentially

resistive,

and

between

20

and

150

ohms

will

take

power

from

the

transceiver

through

the

AT

unit.

2-2-4.

Key

connection

Your

key

should

be

connected

as

illustrated

in

the

figure

below.

When

using

an

electronic

keyer,

make

sure

that

polarity

is

set

for

pasitive.

Always

use

shieid-

ed

line

from

the

key

to

transceiver.

Before

connecting;

check

that

the

potarity

is

correct.

The

KEY

jack

provides

+5.5V.

Use

shielded

cable.

+65V

To

key

a

>

<|4—

GND

Key

connection

2-3.

MOBILE

Being

compact

in

design,

this

transceiver

is

ideal

for

mobile

operation.

Satisfactory

mobile

operation

is

achieved

through

proper

power

and

antenna

connec-

tion,

and

thoughtful

transceiver

installation

and

ad-

justment.

2-3-1.

.Mounting

bracket

installation

Secure

the

TS-440S

under

the

dashboard

using

an

op-

tional

MB-430

mounting

bracket.

As

an

alternative,

use

strapping,

making

sure

that

the

TS-440S

will

not

slip

out

of

place

while

operating

the

vehicle.

Notes:

1.

Do

not

install

the

TS-440S

near

the

heater

outiet.

2.

Allow

sufficient

space

behind

the

TS-440S

to

en-

sure

proper

ventilation.

KENW-01848

/

DRUCK

1

.

Turn

POWER

switch

OFF

before

connecting/dis-

connecting

the

power

cable.

.

Observe

battery

polarity.

N

DC

power

cable

Red

and

white

+

Black

and

gray

—

wo

.

When

charging

your

vehicle

battery,

or

when

jump-

starting

a

dead

battery,

ALWAYS

disconnect

the

power

cable

fram

the

back

of

the

transceiver,

or

damage

may

result

ta

the

transceiver.

Connect

the

TS-440S

power

cable

to

the

battery

ter-

minals,

with

ion

to

current

fi

and

noise

prevention.

The

maximum

current

drawn

by

the

TS-440S

reaches

between

18

and

20A

when

trans-

mitting.

Therefore,

the

cable

should

be

made

as

short

as

possible,

using

the

specified

fuse.

Also,

canfirm

that

the

power

system

of

the

car

{including

the

battery

and

generator

or

alternator)

will

handle

the

increased

load

of

the

TS-4408.

Use

fuse

block

battery

acc-

12V

Battery

Fuse

should

be

as

close

to

the

battery

ibi

terminal

as

possible.

essary

position.

20A

mini-

mum

rating.

hort

as

possible,

TS-440S

3.

OPERATION

3-1.

OPERATING

CONTROLS

3-1-1.

Front

panel

°

POWER.

+36

7's

20

s,

pute

to

s

wa

Ni

yet

[HE

TRANSCEIVER,

JSEND

AUTO

AT

TUNE}

KENWOOD)

.

‘ALC

PWR

_SWR

2—

EPs.

st—

PS.

Ce

£3

BF

AIT/

XIT-

IF

SHIT

AF

0:

F.Lock

PROC

NoTCH

éMST

auto,

AGC

SELECTIVITY

@

POWER

switch

Press

to

turn

the

power

ON

or

OFF.

@

Meter

During

receive

the

meter

is

used

as

an

S-meter.

Dur-

ing

transmit

the

function

of

the

meter

is

controlled

by

the

Meter

switch

@

,

and

provides

either

ALC

level,

PWR.

(power)

or

SWR

readings.

@

MODE/KEY

(Numeric

Keypad)

These

keys

are

used

to

select

the

desired

mode

of

oper-

ation

(USB,

LSB,

CW,

AM,

FM,

AFSK}.

When

program-

ming

a

memory

channel

or

directly

entering

a

frequency

these

keys

are

used

as

a

numeric

keypad

to

enter

the

channel

number

or

frequency.

@

Indicators

AT

TUNE:

Lights

when

the

AT

TUNE

switch

is

ON.

Turns

itself

OFF

when

the

antenna

tuner

has

completed

tuning.

NOTCH:

Lights

when

the

NOTCH

switch

is

ON.

F,LOCK:

Lights

when

the

F.LOCK

switch

is

ON.

1

Miz:

Lights

when

the

1

MHz

step

switch

is

ON.

M.SCR:

Lights

when

the

M.IN

switch

is

pressed.

When

the

memory

scroll

function

is

active

you

can

review

the

contents

of

the

memory

channels

without

a

break:

in

the

reception

of

the

station

you

are

listening

to.

ON

AIR:

Lights

during

transmit.

6

KENW-01848

/

DRUCK

2

v2)

@)

Frequency

display

The

operating

frequency

is

displayed

down

to

the

nearest

100

Hz.

Also

displays

the

memory

channel

number,

RIT/XIT

frequency,

and

includes

indicators

for

memory,

VFO

A/B,

scan,

split

and

RIT/XIT

operations.

©

FUNCTION

switches

The

switches

included

in

this

group

are-the

RIT/XIT,

T-F

SET

switch,

and

the

VFO

select

switches.

(See

page

15.)

@

MIC

gain

control

Microphone

gain

can

be

adjusted

during

USB,

LSB,

AFSK

and

AM

operations.

Gain

is

increased

thru

clock-

wise

rotation

of

this

control.

CAR

(Carrier

level}

control

This

control

sets

the

carrier

level

during

CW,

FM

and

AM

operations.

When

transmitting

in

the

CW

mode,

adjust

so

that

the

ALC

meter

pointer

is

within

the

ALC

zone.

@

SOL

(Squelch)

control

This

function

operates

in

all

modes,

FM,

USB,

LSB,

CW,

AFSK,

and

AM.

This

control

is

used

to

eliminate

atmospheric

noise,

and

receiver

static

noise

during

no

signal

periods.

Slowly

rotate

the

control

clockwise

to

the

point

where

the

am-

bient

noise

just

disapears,

and

speaker

shuts

off.

This

point

is

known

as

the

squelch

threshold

point.

Now

you

will

only

hear

output

from

the

speaker

when

an

incom-

ming

signal

is

present.

For

weak

signal

reception

this

control

should

be

fully

counterclockwise.

Note:

The

squelch

threshold

position

will

vary

from

mode

to

mode,

so

you

may

have

to

readjust

when

you

change

modes.

(®

NOTCH

control

The

NOTCH

function

is

used

to

reduce

or

eliminate

het-

erodyne,

or

CW

type

signals.

The

NOTCH

filter

will

not

be

effective

against

SSB,

AM

or

FM

type

signals.

To

use

the

control,

place

the

NOTCH

switch

ON

and

slow-

ly

rotate

the

NOTCH

control

to

reduce

the

interference.

Normally

the

notch

point

will

occur

between

the

11:00

and

1:00

o’clock

position.

Notes:

1.

The

NOTCH

frequency

can

be

varied

within

a

range

of

approximately

400

to

2600

Hz.

2.

When

an

interfering

signal

such

as

a

CW

station

appears,

slowly

rotate

the

NOTCH

control.

If

you

rotate

the

knob

too

quickly

you

may

pass

right

over

the

notch

point.

Slow

rotation

will

yield

the

best

results.

;

aye

iiterfering

Receive

interfering

Recel

©

signal

attenuated

—

signal

ig

signal

by

NOTCH

control

Audio

output

Audio

output

(NOTCH

OFF)

(NOTCH

ON}

NOTCH

control

@)

IF

SHIFT

control

Note:

The

IF

SHIFT

contro!

does

not

function

in

the

AM

or

FM

modes.

The

IF

SHIFT

control

allows

you

to

shift

the

IF

pass-

band

of

the

receiver

without

changing

the

actual

center

frequency

of

the

receiver.

This

control

is

useful

when

there

is

interference

near

your

center

frequency.

As

the

accompanying

illustration

shows

rotating

this

control

may

place

the

interfering

signal

outside

the

receiver

passband,

allowing

for

easier

copy.

The

operation

of

this

control

in

the

USB,

LSB,

AFSK,

and

CW

modes

is

detailed

below.

°

USB

mode

Interference

from

lower

frequencies

can

be

reduced

or

eliminated

by

rotating

the

IF

SHIFT

control

in

the

©

direction.

This

will

cause

the

resulting

audio

fre-

quencies

to

have

a

slightly

treble

response,

i.e.low

cut

filter

(ow

frequencies

attenuated).

Interference

from

higher

frequencies

can

be

reduced

or

eliminat-

ed

by

rotating

the

IF

SHIFT

control

in

the

©

direc-

tion.

This

will

cause

the

resulting

audio

frequencies

to

sound

a

little

bassy,

i.e.high

cut

filter

(high

fre-

quencies

attenuated).

LSB/AFSK

mode

Interference

from

lower

frequencies

can

be

reduced

or

eliminated

by

rotating

the

IF

SHIFT

controt

in

the

@

direction.

This

will

cause

the

resulting

audio

fre-

quencies

to

sound

a

little

bassy,

just

the

opposite

of

the

effect

in

the

USB

mode.

Interference

from

higher

frequencies

can

be

reduced

or

eliminated

by

rotating

the

IF

SHIFT

control

in

the

©

direction.

This

will

cause

the

resulting

audio

frequencies

to

ap-

pear

a

little

on

the

high

side,

again

just

the

opposite

of

the

USB

mode.

CW

mode

The

operation

of

the

IF

SHIFT

control

is

simitar

to

that

for

USB

with

the

exception

that

you

can

con-

trol

the

tone

of

the

CW

note

by

using

the RIT

control.

Turned

jn

@direction

-

IF

filter

passband

characteristic

®

°

ISignal

Signal Signal

0

o

—

Interfering

signal

Interfering

signal

Turned

in

@direction

|

RIT/XIT@1F-SHIFT-

RIT/XIT—@

IF

SHIFT

RIT/XIT=@™1F

SHIFT

|

0°

0:

@E@

Turn

in

©direction

to

eliminate

inter-

ference

from

signal

Tum

in

@direction

to

eliminate

inter-

ference

from

signal

IF

SHIFT

operation

@

RIT/XIT

control

«

RIT

control

When

the

transmit

frequency

of

the

distant

station

drifts

a

little

bit

during

the

QSO,

but-you

do

not

wish

to

alter

your

transmit

frequency

to

compensate,

you

may

wish

to

make

use

of

the

RiT

contro!

function.

This

contro

allows

shifting

the

receive

frequency

without

shifting

the

transmit

frequency.

The

RIT

control

allows

you

to

shift

the

receiver

frequency

+/—

1.2

kHz.

This

control

is

also

useful

for

pileups

when

the

DX

station

is

transmitting

a

little

above

or

below

his

receive

frequency.

Notes:

1.

The

RIT

offset

is

displayed

on

the

main

display.

You

can

therefore

preset

the

offset

before

you

actually

need

to

use

it.

When

you

move

to

another

station

make

sure

you

turn

OFF

the

RIT

switch.

2.

The

figure

at

the

right

illustrates

that

the

RIT

dis-

play

and

the

VFO

display

may

not

agree

exactly

in

ail

instances

since

the

RIT and

VFO

tune

in

10

Hz

steps.

The

normal

resolution

of

the

VFO

is

100

Hz,

so

if

the

RIT

or

VFO

is

turned

slowly

the

associat-

ed

display

may

not

update

immediately.

You

will

have

to

tune

100

Hz

to

see

the

display

actually

change.

5

8

hig]

J

~0)

(C3

|)

C3

-O)

CS

oO)

[Co

as

°

sy

Ly

~2)

|.0)

OG

[oO

2)

8

A)

(a

°

iy

a)

|

5)

AO

Co

©

XIT

control

When

the

RIT/XIT

control

is

rotated

with

the

XIT

switch

depressed

the

transmit

frequency

can

be

varied

+/—

1.2

kHz

without

affecting

the

receiver

frequency.

Pressing

the

switch

again

releases

the

XIT

function.

@®

RF

gain

control

This

control

adjusts

the

gain

of

the

receiver

high-

frequency

amplifier

section.

.

For

normal

receiver

performance,

and

maximum

gain,

this

control

should

be

in

the

full

clockwise

position.

If

you

are

having

trouble

copying

the

desired

signal

make

anote

of

the

stations

peak

S-meter

reading.

Then,

ad-

just

the

RF

control

counterclockwise,

so

that

the

meter

needle

is

stationary

at

this

level.

Now,

all

signals

that

were

less

than

the

desired

signal

will

be

attenuated,

such

as

static

noise,

etc.,

making

the

completion

of

the

OSO

easier.

If

the

incoming

signal

pegs

the

S-meter

you

can

also

reduce

the

receiver

gain

by

counterclockwise

rotation

of

the

RF

control.

The

S-meter

pointer

will

always

ad-

vance

up-scale

as

the

RF

control

is

rotated

counter-

clockwise,

as

a

visual

reminder

that

the

gain

of

the

radio

has

been

reduced.

(@

AF

gain

control

Tum

the

inside

knob

to

increase

or

decrease

the

volume.

@}

SELECTIVITY

switch

When

an

optional

filter

is

instalied,

the

radio’s

pass-

band

can

be

switched

to

one

of

four

different

band-

widths.

The

switch

has

five

positions;

AUTO,

N,

M1,

M2

and

W,

that

are

used

to

select

the

bandwidth.

The

M1,

and

N

positions

are

not

active

until

the

optional

filters

are

installed,

see

the

accompanying

chart.

This

switch

should

normally

be

set

to

the

AUTO

position.

The

IF

bandwidth

will

then

be

selected

for

optimum

receiver

characteristics,

according

to

the

MODE

that

has

been

selected.

Manual

override

is

possible

by

simple

rota-

tion

of

the

SELECTIVITY

control.

7

The

table

in

section

6-1,

CRYSTAL

FILTER

INSTAL-

LATION

on

page

27

shows

the

bandwidth

of

each

switch

setting.

Note

the

differences

when

the

option-

al

filters

are

installed.

The

YK-88C

is

used

in

the

‘‘N’

position

and

the

YK-88SN

in

the

“’M1”

position.

Notes:

.

During

transmit

the

wide

filter

position

is

selected

regardless

of

the

position

of

the

SELECTIVITY

switch.

..

When

in

the

FM

mode

the

bandwidth

is

always

15

kHz,

regardless

of

the

position

of

the

SELECTIVI-

TY

switch,

.

When

the

SELECTIVITY

switch

is

set

to

N

or

M1,

and

no

optional

filters

have

been

installed,

there

will

be

no

sound

from

the

speaker.

Refer

to

the

option-

al

filter

installation

procedure

in

the

rear

of

this

manual

for

information

on

installation

of

these

options.

N

wo

@®

AGC

switch

This

switch

selects

the

operating

time

constant

of

the

AGC

(Automatic

Gain

Control)

circuit

during

receive.

When

the

AGC

switch

is

set

to

SLOW,

the

receiver

gain

and

S-meter

readings

will

react

slowly

to

large

in-

put

changes,

and

when

set

to

FAST,

the

receiver

gain

and

S-meter

will

react

quickly

to

changes

in

the

input

signal

level.

The

narmai

position

when

using

all

modes

is

the

SLOW

position.

When

working

weak

signals,

or

high

speed

CW

you

might

wish

to

use

the

FAST

position.

Note:

This

switch

is

disabled

during

FM

operations.

@

NOTCH

switch

When

this

switch

is

ON,

the

notch

fitter

is

activated.

@®

PROC

(Processor)

switch

Effective

transmit

power

output

will

increase

when

the

PROC

switch

is

turned

ON

during

USB,

LSB,

AFSK,

or

FM

mode

operations.

Note:

When

the

speech

processor

function

is

used

in

the

USB,

LSB,

or

AFSK

mode

it

is

possible

to

overdrive

the

transmitter:

An

easy

way

to

check

for

excessive

modu-

lation

is

to

monitor

the

ALC

meter.

If

the

needle

is

over

the

ALC

zone

you

are

overmodulating.

Reduce

the

MIC

gain

control

setting

until

the

needle

remains

in

the

ALC

zone

on

voice

peaks.

@

F.LOCK

switch

The

selected

dial

frequency

is

locked

and

cannot

be

changed

except

thru

the

use

of

the

RIT/XIT

controls,

when

this

switch

is

ON.

@

UP/DOWN

switches

Pressing

the

UP

switch

increases

the

frequency,

and

pressing

the

DOWN

switch

decreases

it.

8

@)

1

MHz

step

switch

This

switch

is

used

to

determine

if

the

UP/DOWN

switches

will

function

in

“1

MHz

steps

or

only

thru

the

amateur

bands.

When-the

1

MHz

step

position

is

selected,

the

1

MHz

indicator

will

light.

@)

TUNING

dial

(VFO)

Rotate

the

knob

to

select

the

desired

frequency.

Fast

tuning

is

possible

by

rotating

the

knob

rapidly.

This

con-

trol

may

also

be

used

to

select

the

desired

memory

channel.

The

dial

drag

is

adjustable

by

holding

the

out-

side

knob

and

turning

the

inside

knob

clockwise

to

in-

crease

drag,

and

counterclockwise

to

decrease

drag.

@)

Program

keys

Mev:

Used

to

recall

a

frequency

from

memory

to

the

VFO.

SCAN;

Pressing

during

VFO

operation

will

initiate

program

scan,

and

pressing

during

memory

operation

will

initiate

memory

scan.

Press-

ing

during

scan

operatian

will

cause

the

scan

speed

to

toggle

between

2

speeds,

fast

and

slow.

CLEAR:

Used

to

cancel

memory

storage

operations,

or

to

cancel

an

entry

during

direct

keyboard

entry

of

frequency

using

the

ENT

key.

VFO/M:

Used

to

switch

between

memory

or

VFO

operations.

MIN:

Used

to

enter

data

into

a

memory

channel.

ENT:

Used

to

directly

enter

a

frequency

from

the

numeric

keypad.

@}

PHONES

jack

Output

termina!

for

headphones.

@}

MIC

jack

Connector

for

a

microphone.

GND

(STBY)

MICo-

OGND

(MIC)

STBY

©

NC

DOWNe.

©

BV/approx.

10

mA

UP

@

i}

MIC

connector

(Front

view)

@8

AT

TUNE

switch

When

this

switch

is

turned

ON

with

the

AUTO/THRU

switch

is

placed

in

the

AUTO

position,

the

automatic

tuner

will

be

engaged

and

the

tuner

will

try

to

match

the

antenna.

@)

AUTO/THRU

switch

AUTO:

The

auto

antenna

tuner

is

used

in

transmit.

THRU:

The

auto

antenna

tuner

is

not

used

in

transmit.

@8

Standby

switch

This

switch

is

used

when

you

want

to

manually

con-

trot

transmit

or

receive.

SEND:

Places

the

radio

into

transmit.

REC:

Places

the

radio

into

receive.

The

Standby

switch

is

also

used

to

clear

an

entry

dur-

ing

direct

entry

of

VFO

frequencies,

or

when

entering

a

memory

channel,

@)

ALC/PWR/SWR

meter

switch

ALC

meter

Used

to

monitor

the

drive

level

in

USB,

LSB,

and

AFSK

modes.

PWR

meter

Used

to

indicate

the

output

power.

Note

that

this

meter

is

a

peak

reading

meter,

not

an

average

reading

meter.

SWR

meter

Used

to

indicate

the

Standing

Wave

Ratio

of

the

an-

tenna

and

feedline

connected

to

the

ANT

connector

when

the

AUTO/THRU

switch

is

in

the

THRU

position.

@

ATT

(Attenuator)

‘switch

The

incoming

receive

signal

level

is

attenuated

by

ap-

proximately

20

dB

when

this

switch

is

activated.

When

the

incoming

receive

signal

is

very

strong

(20

dB

aver

S-9),

the

signal

should

be

attenuated

to

pre-

vent

distortion

of

the

signal,

thereby

stabilizing

the

receiver

performance.

This

is

easily

done

by

activat-

ing

the

ATT

switch.

This

control

is

also

useful

when

a

strong

signal

is

near

your

desired

signal,

while

some

joss

will

occur

to

the

desired

signal

as

well

as

the

un-

desired

signal,

the

use

of

the

attenuator

will

sometimes

allow

you

to

complete

the

OSO.

@)

NB

(Noise

Blanker)

switch

When

pulsating

noise,

such

as

that

caused

by

automo-

bile

ignitions

is

encountered,

piace

the

NB

switch

ON.

This

will

provide

approximately

40

dB‘s

of

attenuation

to

this

interfering

signal.

If

there

is

no

noise

present,

the

switch

should

be

in

the

OFF

position.

This

switch

will

not

help

to

eliminate

atmospheric

or

line

noises,

only

pulse

type

noise.

@

VOICE

switch

When

the

optional

VS-1

voice

synthesizer

unit

is

in-

stalled

the

operating

frequency

will

announced

whenever

the

VOICE

switch

is

depressed.

For

a

dial

frequency

of

14.200.0

the

frequency

will

be

an-

nounced

as:

“one”,

‘four’,

point’,

“two”,

“zero”,

“zero,

‘zero’,

‘zero’.

Please

refer

to

page

28

for

installation

instructions

con-

cerning

the

VS-1

Voice

Synthesizer.

3-1-2.

-Rear

panel

Soo

olfojfoli—>

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TES

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J

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o}fo}[o}i—]

TEE}

offoffoy

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T=

clfolfoyic

ST

TE

@

ACC

3

terminal

Spare

RCA

type

terminal.

No

internal

connections

have

been

made.

@

AFSK

IN

terminal

AFSK

input

terminal.

®

AFSK

OUT

terminal

Constant

level

AF

output

terminal

for

AFSK

operation,

@

ANTI

VOX

control

VOX

operations

are

sometimes

difficult

with

high

speaker

volume

control

settings.

The

ANTI

VOX

con-

trol

is

used

to

reduce

the

tendency

of

the

VOX

to

acti-

vate

from

inputs

from

the

speaker.

The

ANT!

VOX

control

is

not

active

when

headphones

are

connect-

ed,

for

obvious

reasons!

(@®\

@®

DELAY

control

This

control

adjusts

the

“‘hang-time”

that

the

radio

will

remain

keyed

after

voice

input

has

stopped.

DELAY,

19)

@®

VOX

GAIN

control

This

contro}

adjusts

the

sensitivity

of

the

VOX

ampli-

fier.

Adjust

this

control

for

your

personal

preference.

VOX

GAIN

{

YQ’

@

ACC

1

jack

This

jack

is

designed

for

connection

of

the

6-pin

DIN

connector

supplied

with

the

optional

interface

unit.

EXT.

SP

(External

speaker)

jack

This

jack

is

for

connection

of

an

external

speaker.

@®

DC

power

connector

This

fs

used

to

connect

the

DC

power

supply.

@

KEY

jack

f

Using

shielded

line,

connect

a

1/4”

phone

plug

to

this

Jack

for

CW

operation.

Open-terminal

voltage

is

approx-

imately

5.5

VDC.

()

ANT

(Antenna)

connector

This

UHF

connector

should

be

attached

to

a

suitable

antenna

for

transmitting

and

receiving.

The

antenna

ca-

ble

should

be

50-ohm

coax,

terminated

with

a

PL-259

connector,

@

GND

(Ground)

terminal

To

prevent

electric

shock,

as

well

as

RFI

and

BCI,

con-

nect

the

transceiver

to

a

good

earth

ground.