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OPERATING

INSTRUCTIONS

STANDARD

C430

430

MHz

FM

lOW

12CH

+

MEMORY

CH

/

©

4

Thank

you

for

your

having

purchased

STANDARD

C

430,

the

füll

solid

State

FM

transceiver

for

the

amateur

radio

in

430

MHz

band.

Your

unit,

composed

of

the

high-gain,

high-efficiency

transistors,

crystal

Alters,

and

many

other

world

top

quality

parts,

has

been

developed

by

your

STANDARD

COMMUNICATIONS

CORP.

with

un-

sparing

applications

of

its

traditionally

held

ultra-miniaturization

techniques

and

with

its

personal

considerations

given

from

the

Standpoint

of

hams

as

the

actual

users.

STANDARD

COMMUNICATIONS

CORP.

proudly

presents

C430

turned

out

from

its

modern

facilities

with

its

confidence

that

a

number

of

the

product's

features

and

great

reliability

will

provide

you

with

satisfaction.

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

TABLE

OF

CONTENTS

Features

of

C

430

2

Cautions

Prior

to

Use

6

Installation

Procedures

8

Communication

Procedures

9

Memory

Channel

10

"Busy"

Indicator

Lamp

10

Meters

11

Calibration

Switch

11

Squelch

Unit

12

Stand

12

Adjustment

of

Microphone

Sensitivity

13

Microphone

Connector

13

Accessory

Terminal

14

Channel

Increase

15

Accessory

Parts

17

Connection

of

External

Speaker

18

Antennas

and

Coaxial

Cables

19

Nois

Prevention

Measures

for

Use

as

Mobile

Station

20

C

430

Specification

21

—

1

1*

Features

of

C430

We

know

that

lighter

and

smaller

high-performance

equipment

creates

new

appli-

'

^

cations,

and

this

quite

is

true

of

C

430.

Such

features

and

many

others

of

this

Model

as

mentioned

below

will

enable

all

of

you—from

beginners

to

veterans—to

enjoy

a

broader

scope

of

the

usages:

1.

Small

Size

and

Light

Weight

This

new

FM

radio,

smaller

in

volume

than

a

half

of

the

comparable

products

of

this

Company

and

as

light

as

0.96

kg,

has

succeeded

in

fi

nding

its

Installation

Space

for

moble

Station

use

at

vehicle

driver's

seat

area

instead

of

assistant

driver's

which

has

been

exclusively

used

for

this

purpose

in

the

past,

and

ushered

in

the

debut

of

a

new

type

mounting

metal

bracket.

2.

Push-In/Pull-Out

Metal

Bracket

This

metal

bracket

has

simplified

the

attaching

and

detaching

processes

of

C

430

on

a

Single

motion

basis.

For

attaching,

just

snap

your

radio

into

the

bracket.

The

reverse

consequence

can

be

obtained

by

simply

snapping

it

off

toward

yon.

The

bracket

with

the

radio

off

therefrom

is

an

evenly

faced

sheet

metal,

which

therefore

prevents

rattling

causable

during

the

vehicle

Operation

and

also

protects

your

feet

against

a

possible

hazard

from

a

sharp

projection.

Such

attaching

and

detaching

processes

do

not

require

you

to

put

in

your

hands

on

the

sides

of

the

rig.

Thus,

the

attaching

process

brings

the

sides

of

the

rig

into

a

dose

contact

with

their

corresponding

parts.

The

rig's

occupancy

of

small

Space

serves

for

the

efficient

employment

of

the

limited

interior

room

of

the

car.

3.

Capacity

of

12

Channels

Plus

1

C430

contains

a

"memory

Channel"

in

addition

to

the

regulär

12

Channels.

Place

the

crystal

for

a

specific

frequency

in

the

crystal

socket

of

this

memory

Channel,

and

a

shift

to

the

memory

Channel

will

be

possible,

regardless

of

the

Position

of

the

Channel

selector.

The

memory

Channel

indicator

lamp

illuminates

in

orange

color

when

the

rig

is

operating

on

the

memory

Channel.

4.

Remote-Controlled

Switching

of

Memory

Channel

The

memory

switch

conveniently

located

on

the

handheld

microphone

can

per

form

a

quick

"

OFF

"

and

"

ON

"

Operation

of

the

memory

Channel.

5.

Calibration

Switch

A

calibration

switch

is

set

on

the

rear

panel

of

C430

for

the

frequency

adjust-

ment

and

other

purposes.

6.

Professional-Minded

Circuit

Design

High-performance

sillicon

transistors

and

diodes

are

abundantly

used

in

the

circuitry

designed

Professional

mindedly.

The

transmitter

is

provided

with

the

newest,

high-gain,

high-efficiency

transistors,

and

the

vector

composite

phase

modu-

lation

System

is

adopted

for

generation

of

FM

wave.

The

receiver

is

equipped

with

the

Helical

Resonator

structured

radio

frequency

amplifier

and

crystal

fi

lter.

(a)

Receiver

(1)

High

Sensitivity

High

sensitivity

design

as

represented

by

the

—

3

dB

QS

sensitivity

at

20

dB

and

the

over

34

dB

S/N

at

0

dB

input.

—

2

—

(2)

Radio

Frequency

Amplifying

Stage

Having

Helical

Resonator

Structure

The

stable

Operation

and

high

sensitivity

help

improve

the

receiving

spurious

and

cross-modulation

characteristics.

(3)

Crystal

Filter

The

first

intermediate

frequency

(IF)

amplifying

stage

incorporates

a

mono-

lithic

crystal

fi

lter

to

remarkably

enhance

the

selectivity

of

the

fi

rst

IF

am

plifying

stage,

improve

the

image

of

the

second

IF,

and

reduce

the

interference

which

may

be

caused

at

the

adjacent

frequencies.

Adoption

of

the

crystal

fi

lter

is

aimed

not

merely

at

correcting

the

degra-

dation

in

the

image

of

the

second

IF

and

other

deficiencies—regarded

as

the

weak

Points

involving

the

double

superheterodyne

system,

compared

with

the

Single

superheterodyne

system—but

also

at

taking

advantage

of

the

secured

high

gains

which

constitute

positive

point

of

the

double

superheterodyne

System.

The

capabilities

of

the

crystal

fi

lter,

as

reflected

in

the

—70

dB

spurious

response

and

the

—75

dB

sensitivity

(at

40

KHz),

could

be

described

as

more

than

sufficient.

(4)

Ceramic

Filter

The

ceramic

fi

lter

in

the

second

IF

amplifying

stage

plays

a

role

for

better

selectivity

characteristics.

(5)

Integrated

Circuits

The

second

IF

amplifying

stage

consists

of

the

transistorized

3-stage

am-

plifying

unit

plus

integrated

circuitry

showing

very

good

limiter

effect.

(6)

Squelch

Circuit

The

squelch

circuit

is

a

noise

rectifier

type

enjoying

an

established

reputa-

tion

for

mobile

Station

use,

and

the

circuit

operates

securely,

thanks

to

the

high

gains

resulting

from

the

2-stage

nois

amplification.

(7)

Squelch

Time

Constant

With

the

squelch

unit

(accessory)

connected

to

the

accessory

terminal

on

the

rear

panel,

the

squelch

time

constant

can

be

changed

to

the

best

suitable

for

respective

uses

as

mobile

and

fi

xed

stations.

(8)

4

W

Output

at

Audio

Frequencies

The

maximum

output

at

aud

o

frequencies,

as

much

as

4

W,

will

permit

the

Operation

of

the

transceiver

at

an

adequate

sound

level

while

in

driving

even

on

extraordinarily

noisy

express-ways.

(9)

"Busy"

Indicator

Lamp

The

green

lamp

turns

off

and

on

in

association

with

the

squelch

circuit,

irrespective

of

the

position

of

the

volume

control

knob,

to

clearly

indicate

which

rig

is

receiving

the

signal.

This

lamp

is

convenient

in

a

parallel

Opera

tion

at

50

MHz,

144

MHz,

and

other

bands.

des

High

Sensitive

Incoming

Signal

Meter

This

incoming

signal

meter,

containing

a

meter

amplifier

designed

to

swing

the

pointer

in

response

even

to

weak

incoming

signal,

can

read

in

detail

the

change

in

the

input

voltage

of

the

antenna.

(b)

Transmitter

(1)

High-Gain,

High-Efficiency

Transistors

Adoption

of

the

newly

developed

high-gain,

high-efiiciency

transistors

has

suc-

—

3

—

cessfully

made

the

protective

circuit

uimecessary.

(2)

High-Efficiency

Circuit

Design

High-efl5ciency

designed

circuit

is

another

feature

as

proved

by

the

10

W

transmitting

output

and

the

2.5A

power

consumption

which

includes

the

power

consumption

for

the

three

lamps

and

the

relay.

(3)

Angle

Resonator

The

band-pass

fi

lter

constitutes

an

angle

resonator

for

adequate

attenuation

of

harmonics

and

other

waves.

(4)

Twisted

Wire

Twisted

wire

is

used

for

stable

impedance

Convention

and

wide

bandwidth

characteristics.

(5)

Newly

Developed

Relay

A

new

relay

suffering

an

extremely

small

loss

even

at

UHF

band

has

been

developed

for

adoption

as

a

relay

for

the

antenna

and

transmitting-receiving

power

supply

switch.

(6)

Microphone

Gain

Control

A

semi-fixed

resistor

for

microphone

gain

control

is

mounted

on

the

main

printed

wiring

board

for

transmitter.

(7)

Vector

Composite

Phase

Modulation

The

vector

composite

phase

modulation

system—the

orthodoxical

modula-

tion

System

for

mobile

FM

transmitter—is

employed.

(8)

Instantaneous

Deviation

Control

(IDC)

and

Speech

Roll-off

Filter

A

combined

use

of

the

Silicon

diode

operated

IDC

and

the

speech

roll-off

fi

lter

provides

high

clarity

and

high

average

level

of

modulation,

and

causes

no

interference

with

other

Channels

through

expansion

of

the

band

occupancy.

(9)

Transmitter

Indicator

Lamp

and

Meter

Facility

When

the

push

button

on

the

microphone

is

pressed,

the

red

pilot

lamp

on

front

panel

illuminates

to

show

that

the

transmitter

is

in

a

transmitting

mode.

Düring

the

transmission,

the

meter

on

the

front

panel

indicates

the

relative

value

of

the

transmitting

output.

7.

Channel

Selector

with

Short-Circuiting

Ring

The

Channel

selector

of

C

430

is

'provided

with

a

short-circuiting

ring

to

preclude

the

possible

interference

caused

when

additional

Channel

quarts

crystals

have

been

installed

or

when

the

frequencies

of

the

neighboring

Channels

have

been

adjusted,

thereby

helping

to

make

the

frequency

alignment

much

easier

during

the

Installa

tion

of

additional

Channel

crystals.

The

trimmer

capacitor

for

delicate

alignment

for

both

the

transmitter

and

receiver

can

perform

accurate

adjustment

of

all

the

Channel

frequencies.

8.

Crystal

Oscillating

Unit

Designed

under

the

Same

Specification

as

C4300

Master

oscillation

system

is

adopted

for

both

the

transmitter

and

receiver,

using

the

frequency

ranges

available

for

the

most

stable

oscillation—18

MHz

band

for

transmission

and

17

MHz

band

for

receiving.

The

crystal

oscillating

unit

of

C

430

is

interchangeable

with

that

of

C

4300

because

of

the

identical

specification.

9.

Uncasing

Possible

with

No

Help

of

Tools

Uncasing

is

possible

with

the

two

screws

in

the

rear

removed

by

the

fi

ngertip

Operation.

This

feature,

together

with

that

of

the

calibration

switch,

lends

itself

—

4

—

to

the

addition

of

the

Channel

and

other

purposes.

10.

Anodized

Alminum

Chassis

Anodized

alminum

is

used

for

both

the

case

and

the

chassis.

The

main

chassis

is

2

mm

thick,

for

an

adequate

mechanical

strength

and

designed

to

show

good

heat

sink

effect.

11.

Green

Lighting

Anti-dazzling

green

lights

are

employed

for

both

the

meter

and

Channel

indica-

tors

to

avoid

glaringness

otherwise

caused

during

the

nocturnal

Operation

of

C

430

as

a

mobile

Station

while

in

driving,

thereby

assuring

a

safer

driving.

12.

Antenna

Connector

The

M-shaped

antenna

connector

screws

have

their

pitches

available

commonly

in

both

inch

and

millimeter.

13.

Microphone

Connector

with

Speaker

Terminal

A

Jt4

pin

connector

is

used

for

microphone

connection.

The

audio

frequency

Output

linked

to

the

j{4

pin

permits

the

connection

to

a

telephone

handset

as

well

as

the

microphone.

14.

Accessory

Terminal

(A.

T.)

A

9

pin

accessory

terminal

is

available

on

the

rear

for

different

connections

of

accessory

units

from

outside.

15.

Wide

Range

of

Operating

Temperature

^^0^

operating

temperature

widely

ranging

from

—30

degrees

C

to

+60degrees

C

is

good

enough

for

mobile

Operation

even

in

severely

cold

environments.

16.

Microphone

with

Memory

Switch

The

memory

switch

on

the

microphone

and

the

micro

switch

used

as

a

push-

to-talk

switch

help

to

perform

sharp

switching

from

transmission

mode

to

receiv-

ing

mode

and

vice

versa.

17.

Attachable/Detachable

Stand

The

attachable/detachable

stand

furnished

can

facilitate

the

use

of

C430

as

a

hxed

Station.

18.

Power

Supply

Protective

Circuit

The

power

supply

circuit

is

provided

with

a

protective

function

so

as

to

keep

the

internal

circuit

from

any

possible

damage

caused

in

wrong

connection

with

reverse

polarity

of

the

power

supply.

—

5

—

2.

Cautions

Prior

to

Use

The

following

precautions

must

be

observed

for

the

maximum

Performance

of

your

C

430

and

for

your

enjoyment

of

better

ham

life:

1.

DO

NOT

connect

or

disconnect

the

power

supply

cord

while

keeping

the

power

supply

switch

at

"ON"

position.

2.

DO

NOT

connect

or

disconnect

the

antenn

or

external

Speaker

while

keeping

the

power

supply

switch

at

"

ON

"

position.

3.

DO

NOT

push

the

microphone

switch

with

the

antenna

left

disconnected.

4.

BE

SURE

to

replace

the

blown-off

fuse

with

a

new

one

of

the

designated

SA

rating.

5.

Prior

to

the

power

supply

connection,

check

to

see

the

polarity

of

the

elec-

trical

System.

C43Q

is

constructed

for

negative

grounding

with

the

black

lead

to

be

grounded.

®

(7)(6)(5

iMi

1

I?

mA

■m

Figure

2—1

0

Volume/On-off

switch

Squelch

switch

knob

Microphone

connector

Transmit

indicator

lamp

Busy

lamp

0

Memory

lamp

m

Channel

selector

Power

cord

Calibration

switch

Antenna

connector

External

Speaker

terminal

Accessory

terminal

Cabinet

fi

xing

screw

I

Mounting

bracket

Complemental

mounting

bracket

Microphone

Memory

switch

3.

Installation

Procedures

Determine

the

installation

position

with

your

heed

paid

to

the

following

points

prior

to

the

installation:

1.

Is

there

any

imnatural

posture

required

in

the

Operation

of

the

Channel

selector

and

other

control

knobs

?

2.

Are

all

the

control

knobs

and

meter

scale

face

located

in

piain

view

?

3.

Is

the

rig's

installation

position

for

use

as

a

mobile

Station

not

impeding

the

general

motions

of

the

vehicle

driver

or

the

Operator

of

C430?

4.

Specifically

for

use

as

a

mobile

Station,

make

sure

not

to

place

the

transceiver

anywhere

near

a

heater

duct,

air

conditioner's

exhaust

mouth,

air

intake

mouth

and

the

like.

5.

Refrain

from

motmting

the

radio

on

such

places

as

exposed

to

rainfall

and

sea

water.

Although

there

is

no

restriction

as

to

the

installation

posture

of

C430,

it

is

recommended

that

the

body

of

the

radio

be

set

upright

for

use

in

yachts,

com-

mercial

vehicles,

etc.

Now,

have

you

decided

on

the

installation

position

of

your

radio?

If

you

have

take

the

following

installation

procedures:

1.

Take

out

the

furnished

mounting

metal

bracket

©

and

attach

it

at

the

ensured

installation

position

on

the

body

of

the

radio.

Depending

on

the

installation

Position,

use

the

supplied

auxiliary

mounting

bracket,

which

can

be

bent

or

cut

freely

to

your

need

(See

Figure

2-1).

^

^

2.

Position

the

mounting

bracket

in

predetermined

installation

place,

make

a

bore

for

the

bracket

with

a

5

or

5.5

mm

drill,

and

secure

it

with

the

supplied

screws

and

nuts,

preferably

at

three

or

more

places.

Use

wood

or

tapping

screws

according

to

the

mounting

plane.

3.

Set

the

body

of

the

radio

again

on

the

mounting

bracket.

Prior

to

taking

this

Step,

ensure

that

the

calibration

switch

on

the

rear

on

the

body

of

the

radio

®

is

at

"OFF"

Position

(See

Figure

2-1).

4.

Connect

the

power

supply.

At

this

time,

again,

make

sure

of

the

polarity

of

the

electrical

System.

Insert

the

furnished

line

filter

(CLF03)

into

the

in-line

connecting

section

of

the

power

supply

cable.

5.

Perfectly

connect

the

antenna

connector

©

(See

Figure

2-1).

6.

Connect

the

microphone

to

the

microphone

connector

(D

on

the

front

of

the

radio,

and

fi

x

the

supplied

microphone

hanger

on

a

convenient

place

for

removal

(See

Figure

2-1).

The

installation

is

completed.

Now,

you

are

ready

to

start

the

commuication.

—

8

—

4.

Communicatioii

Procedures

1.

Preparation

for

communication

First,

turn

the

SQL

knob

(2)

fully

to

counterclockwise,

and

then

set

the

Channel

selector

(§)

to

the

Channel

you

desire

to

use.

For

use

of

the

memory

Channel

turn

on

the

microphone

memory

switch

2.

Turn

on

the

power

supply

switch

Revolve

the

VOL.

OFF

knob

(T)

to

clockwise

until

it

clicks

and

actuates

the

power

supply

as

ihdicated

by

the

lighting

of

the

Channel

selector

and

meter

indi-

cation

lamps.

3.

Adjust

the

Volume

As

you

go

on

rotating

the

VOL.

OFF

knob

®

to

clockwise,

you

will

come

to

a

point

where

a

rustling

noise—or

the

conversation

in

the

case

someone

is

talking

Over

the

Channel—becomes

audible.

Set

the

knob

to

appropriate

voiume

as

you

are

listening

to

such

noise

or

conversation

over

other

Station.

4.

Setting

of

Squelch

Control

Turn

the

Channel

selector,

and

set

the

SQL

knob

(2),

using

a

disengaged

Chan

nel.

Revolve

the

knob

slowly

to

clockwise

until

you

come

to

a

point

where

a

noise

suddenly

extinguishes.

Set

the

SQL

knob

on

this

point,

and

you

will

hear

no

noise

but

the

incoming

signal

alone

through

the

Speaker.

In

this

condition,

the

Signal

is

of

very

poor

clarity

and

possibly

disturbing

even

when

the

squelch

circuit

turns

off

and

on

to

the

incoming

signal.

In

such

case,

turn

the

SQL

knob

slightly

further

to

the

right

and

set

it

at

an

appropriate

position.

5.

Transmission

Take

up

the

microphone,

press

the

microphone

push

button,

and

start

talking

slowly

and

distinctively

in

neither

too

loud

nor

too

low

a

voice

but

at

normal

vocal

level.

At

this

time,

the

red

lamp

in

the

front

keeps

illiuninating

to

show

the

transmitting

Status

as

long

as

the

push

button

remains

pressed.

Simultane-

ously,

the

meter

indicates

the

comparative

value

of

the

power

of

transmission.

Now,

your

voice

is

on

the

air.

—

9

—