Standard C430 User manual
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
—
5.
Memory
Channel
C430
contains
one
memory
Channel
in
addition
to
the
regulär
12
Channels.
The
transmitter
and
receiver
are
equipped
with
the
completely
independent
crystal
oscil-
lators
for
the
12
Channels
and
the
memory
Channel
respectively.
The
switclang
process
between
the
12
Channels
and
the
memory
Channel
is
accom-
plished
with
the
bias
of
the
respective
oscillators
varied
by
means
of
the
transistor
Switch.
In
the
actuation
of
the
12
Channels,
the
osdllation
is
suspended
with
the
interrupted
base
bias
of
the
memory
Channel
oscillator,
whereas
in
the
actuation
of
the
memory
Channel,
the
emitter
of
the
12
Channels
oscillator
is
reversely
biased
for
halt
of
oscillation.
This
switching
is
implemented
with
the
transistor
switch
operated
by
the
memory
switch
on
the
microphone.
Therefore,
if
the
memory
switch
is
set
at
"
ON
"
position,
shift
to
the
memory
Channel
takes
place,
no
matter
on
which
position
the
Channel
selector
is
placed.
Düring
the
Operation
of
the
memory
Channel,
the
memory
indicator
lamp
on
the
front
panel
illuminates
in
orange
color.
WARNING:
This
Company
made
micophones
without
the
memory
switch
(CMP
01,
CMP
07,
and
CMP
08)
perform
automatic
switchover
to
the
memory
Channel
and
reject
the
switchover
to
the
regulär
12
Channels.
Use
either
the
Special
Channel
for
your
calling
Channel
as
the
memory
Channel.
6.
''Busy"
Indicator
Lamp
The
green
"
busy
"
indicator
lamp
on
the
front
panel
tums
off
and
on
imder
the
voltage
of
the
Q117
emitter
varied
to
the
"OFF"
and
"ON"
Operation
of
the
squelch
circuit.
This
indicator
lamp,
which
is
independent
of
the
audio
Output,
illuminates
in
green
to
show
that
transmitted
signal
is
being
received,
even
if
the
volume
control
is
tumed
down,
and
when
in
parallel
use
of
the
rigs
for
50
MHz
144
MHz
and
others,
the
green
lamp
teils
from
which
rig
the
sound
is
being
received.
—
10
—
7,
Meters
Meter
®
indicates
the
strength
of
the
incoming
signal
in
the
receiving
process,
and
the
comparative
value
of
power
of
transmission
in
the
transmitting
process.
Düring
reception
of
transmitted
signal,
the
magnitude
of
the
incoming
signal
to
Swing
the
pointer
8
graduations
is
equivalent
to
about
5/aV
(14
dB).
The
indication
of
the
Output
of
the
transmitted
signal
is
arranged
in
about
8
graduations.
See
Figure
7-1
for
the
relationship
between
the
incoming
signal
in
reception
and
the
scale
of
the
meter.
2
4
6
8
Scale
of
the
meter—
Figure
7-1
8.
Calibration
Switch
The
calibration
switch
®
on
the
rear
panel,
set
at
"
ON
"
position,
sets
in
simul-
toneous
motion
the
crystal
oscillators,
modulators,
and
the
fi
rst
and
second
doublers
of
the
receiver
and
transmitter
sections.
Use
the
switch
for
alignment
of
the
fre-
quencies
for
reception
and
transmission
of
signals
with
the
central
meter
coupled
with
jjl
and
#6
pins
of
the
accessory
Terminal.
The
calibration
switch,
which
works
also
as
a
monitor
at
the
same
time,
enables
you
to
check
on
the
modulation,
etc.
WARNIN6:
DO
NOT
transmit
signal
with
the
calibration
switch
set
at
"
ON
"
position.
—11
—
9.
Squelch
Unit
The
squelch
time
constant
for
the
body
of
C
430
is
made
short
for
ideal
communi-
cation
between
fi
xed
stations.
For
communication
between
fi
xed
and
mobile
stations
or
between
mobile
stations,
it
is
recommended
that
the
furnished
squelch
unit
be
inserted
in
the
accessory
terminal.
The
squelch
unit
is
designed
to
allow
the
con-
nection
of
a
chemical
capacitor
to
#1
and
§4
pins
of
the
accessory
terminal.
#4
pin,
connected
to
the
base
of
the
SQL
SW
Q115,
lengthens
the
time
constant
in
parallel
with
C
200.
Replace
the
chemical
capacitor
of
the
squelch
unit,
and
change
to
your
desired
time
constant.
10.
Stand
C430
is
provided
with
the
stand
®
for
use
as
a
fi
xed
Station.
Insert
the
stand
into
the
small
bores
on
both
sides
of
the
case
as
shown
in
the
photo.
12
—
11.
Adjustment
of
Microphone
Sensitivity
The
microphone
sensitivity
is
adjusted
to
best
meet
the
purposes
of
mobile
and
fi
xed
stations.
However,
if
further
adjustment
of
the
sensitivity
is
necessary,
make
an
adjustment
with
the
semi-fixed
resistor
of
R331
located
on
the
main
printed
board
for
transmitter.
See
Figure
11-1.
Transmitter
main
P.C.Board
■►Front
>(R331)
Variable
resistor
for
mike
sensitb
vity
adjustment
Big
Small
Figure
11-1
12.
Microphone
Connector
Microphone
connection
will
be
made
as
indicated
in
the
below
fi
gure.
jjl.
Hot
microphone
terminal
(common
with
AT-2)
j}2.
Grounding
terminal
(common
with
AT-1)
Ö3.
Microphone
Fush-button
switch
terminal
(common
with
AT-3)
J{4.
Audio
Output
terminal
(common
with
AT-7)
Figure
12-1
13
—
13.
Accessory
Termiiial
The
accessory
terminal
connection
will
be
made
as
shown
in
Figure
13-1.
Yen
can
devise
various
accessory
connections,
using
this
terminal.
9(0
O
AT
Terminal
No.
Connection
AT-1
Grounding
AT-2
Microphone
input
terminal,
common
with
jfl
of
microphone
con-
nector
AT-3
Push-to-talk
Switch,
common
with
Jf3
of
microphone
connector
AT-4
Squelch
Output,
connected
to
Q115
base
AT-5
AT-6
FM
detector
output
AT-7
Audio
frequency
output,
Auxiliary
terminal
of
external
Speaker
AT-8
+
13.8
V,
power
supply
before
power
supply
switch
AT-9
+
13.8
V
for
receiver
Figure
13-1
—
14
—
14.
Channel
Increase
1.
Specifiication
of
Crystal
Oscillating
Unit
Use
the
crystal
oscillating
unit
in
the
size
of
HC
25/U
for
both
transmitter
and
receiver.
(a)
Crystal
Oscillating
Unit
for
Transmitter
The
transmitting
frequency
of
€430
multiplies
by
24
times.
Therefore,
the
frequency
of
the
crystal
oscillating
unit
is
equal
to
one
24th
of
the
desired
transmitting
frequency
as
indicated
by:
focT)=fr/24,
where
focx)
Stands
for
the
frequency
(in
MHz)
of
crystal
oscil
lating
unit
for
transmitter
and
fr
Stands
for
the
desired
transmitting
fre
quency
(in
MHz)
(b)
Crystal
Oscillating
Unit
for
Receiver
The
fi
rst
local
oscillating
frequency
for
€430
multiplies
by
24
times
and
the
fi
rst
IF
is
11.7
MHz.
Therefore,
the
frequency
of
the
crystal
oscillating
unit
for
receiver
can
be
calculated
by
the
following
formula:
fo(R)=fr—11.7/24,
where
focR)
means
frequency
(in
MHz)
of
the
crystl
oscil
lating
unit
for
receiver,
and
fr
represents
the
desired
receiving
frequency
(in
MHz).
No
over-tone
system
is
adopted
for
the
crystal
oscillating
unit
for
transmitter
or
receiver.
In
your
order
for
the
crystal
oscillating
unit,
specify
the
frequency
as,
for
instance,
432.24
MHz
for
C
430
use.
2.
Crystal
Oscillator
Installation
Pro-
cedures
When
the
crystal
oscillating
unit
of
your
desired
frequency
is
ready,
take
out
the
Chassis
of
this
transceiver
from
the
case
by
removing
the
two
case-
mounting
screws
from
the
rear.
For
the
arrangement
of
the
socket
of
the
crystal
oscillating
unit,
see
Figure
14-1.
3.
Frequency
Adjustment
The
frequencies
of
€430*s
actually
loaded
Channels
have
already
been
subjected
to
strict
adjustment
for
both
transmitter
and
receiver.
However,
conduct
yourself
the
neces-
sary
Channel
frequency
adjustment
on
any
added
Channels.
Absence
of
the
frequency
counter
makes
the
frequency
adjustment
a
fairly
big
job.
However,
thanks
to
the
€430*s
accessory
termi-
nal
available,
you
can
easily
complete
the
frequency
adjustment
in
the
follow
ing
procedures:
First,
connect
a
30
to
50/iA
ampere-
CRYSTAL
LOCATION
RX4
►TX
OdDrrPI
(X3D^
&
MEMORY
CHANNEL
RX
Figure
14-1
a-
c5
TX
15
—
meter
to
and
pins
of
the
accessory
terminal,
utilizing
the
tester
and
other
apparatuses,
before
you
are
going
to
take
the
below
mentioned
steps.
(a)
Align
the
receiving
frequency
of
your
Station
with
the
frequency
of
another
Station
transmitting
with
precise
frequency.
While
in
reception
of
the
signal
from
the
Station,
adjust
the
trimmer
capaci-
tor
in
the
crystal
oscillating
circuit
for
receiver
so
that
the
connected
ampere-
meter
can
indicate
zero
graduation.
If
you
hear
any
distorted
or
no
sound
from
the
other
Station
even
with
the
amperemeter
pointing
to
zero
in
the
said
process,
then
make
a
further
adjustment
on
the
trimmer
capacitor
till
you
get
proper
adjustment.
(b)
Have
Another
Station
Adjust
His
Frequency
with
Yours
With
the
fi
ne
adjusting
circuit
for
transmitting
frequency,
necessarily
provided
at
the
Station,
have
him
adjust
his
transmitting
frequency
in
the
same
manner.
(c)
Adjust
Your
Transmitting
and
Receiving
Frequencies
Make
adjustment
with
the
calibration
switch
set
at
"ON"
position.
Simultaneously
check
on
the
modulation
with
the
volume
control
adjusted
properly
so
as
not
cause
any
howling.
Make
sure
not
to
transmit
any
signal
when
the
calibration
switch
is
set
at
"ON"
position.
The
adjustment
on
the
memory
Channel
can
be
done
in
the
same
procedures.
List
of
Frequencies
of
Crystal
Oscillating
Units
in
Standard
Stock
for
Installa
tion
of
Additional
Channels
For
installation
of
additional
Channels,
the
Company
has
the
crystal
oscillating
units
whose
frequencies
are
shown
in
Figure
14-2
below,
constantly
maintained
as
Standard
stock.
This
stock
will
serve
for
short-time
delivery
of
the
units
ordered.
For
the
crystal
oscillating
units
for
installation
of
additional
Channels,
which
do
not
come
under
the
Standard
stock
items,
consult
with
this
Company's
branches
or
sales
representatives.
List
of
Frequencies
of
the
Units
under
Standard
Stock
Items
431.04
MHz
432.24
MHz
431.16
MHz
432.36
MHz
431.28
MHz
432.48
MHz
431.40
MHz
432.60
MHz
431.52
MHz
432.72
MHz
431.64
MHz
432.84
MHz
431.76
MHz
432.96
MHz
Figure
14-2
—
16
—
15.
Accessory
Parts
The
following
accessory
parts
are
available
for
C430
0
Speaker
Box
SR-C205K
{4
Ohms)
0
AC
Power
Supply
SR-C
12/120-2,
9
to
16
V,
6.5A
®
CMP-31
—
17
—
16.
Coimection
of
External
Speaker
In
the
event
that
the
sound
voIume
from
the
internal
Speaker
is
not
sufficient,
connect
external
Speaker
to
SPK
terminal
on
the
rear
panel,
and
you
will
fi
nd
only
the
external
Speaker
operating
with
the
internal
one
non-operating.
NOTB:
Use
an
external
Speaker
with
4
ohm
impedance.
This
Company
made
spea>
ker
box
(C205K),
containing
a
large
oval
Speaker
cone
with
4
ohm
impedance,
will
best
meet
this
purpose.
—
18
—
17.
Antenna
and
Coaxial
Cables
The
quality
of
the
antennas
and
coaxial
cables
gives
an
affect
to
the
Performance
of
C430.
Pay
your
attention
to
the
following
when
you
buy
the
antennas
and
coaxial
cables:
Antennas
1.
Use
the
antenna
having
a
matched
impedance
of
50
ohms.
2.
Install
the
antenna
at
a
maximum
height
possible.
Roof
top
is
recommendable
for
Installation
of
the
antenna
for
mobile
Station.
3.
Use
the
antenna
with
good
Performance.
Coaxial
Cables
1.
Use
the
coaxial
cable
having
a
matched
impedance
of
50
ohms.
Do
not
use
3C-2V,
5C-2V,
etc.,
becouse
of
their
matched
impedance
of
75
ohms.
2.
We
recommend
as
thick
coaxial
cable
as
possible
for
this
purpose,
because
the
loss
of
the
coaxial
cable
in
430
MHz
band
connot
be
disregarded.
In
the
case
of
less
than
5
m,
use
RG-58U,
5D-2V,
etc.
In
the
case
of
5
m
or
more,
use
RG-8U,
8D-2V,
10D-2V,
etc.
—
19
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