Kenwood TS-430S User manual

HF TRANSCEIVER

INTRODUCTION
You are now the owner of our most recent product, the TS-430S amateur band transceiver and
general coverage receiver. Please read this instruction manual carefully before placing your new
transceiver in service. This equipment has been carefully engineered and manufactured to rigid
quality standards, and should give you satisfactory and dependable operation for many years.
AFTER UNPACKING:
@ Shipping container:
Save the boxes and packing in the event
your unit needs to be transported for re-
mote operation, maintenance, or service.
@ The following explicit definitions apply in
this manual:
Note: If disregarded, inconvenience
only.
Accessaries
WV SIT AFICY, CONG ce cescg cscs evend pn entusse cosensveocacvensoe 1
Instruction Manual (B50-4006-30)...
Fuse (20A) (FO5-2034-05)..
Calibration cable (E31-2154-05)
DC power cable (E30-1638-05)...
7 pin DIN plug (E07-0751-05)
8 pin DIN plug (E07-0851-05) ...... eee 1
* Included only for U.S.A.
No risk of equipment damage or personal injury.
Caution: Equipment damage may occur, but not personal injury.
CONTENTS
SECTION 1. SPECIFICATIONS..
SECTION 2. FEATURES .
SECTION'S. PREPARATION: FORMUSE coi a5cori,. svicosnnes etirian scart reanttiySroeeatnestenasaesompeweahsnasdsnsssssssesenssrenssesssceans 4
SECTION 4. CONTROLS, INDICATORS AND CONNECTORS
41 FRONT AND TOP PANELS
4.2 REAR PANEL
SECTION 5. OPERATION
5.1 RECEPTION
5.2 TRANSMISSION
5.3 VOX OPERATION...
5.4 SEMI-BREAK-IN OPERATION
5.5 OPERATION WITH A LINEAR AMPLIFIER..
5.6 CW OPERATION
5.7
KEY
BOARD
FUNCTIONS.
.
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5.9 FIXED STATION OPERATION...
SECTION 6. ADDITIONAL INFORMATION ..
SECTION 7. TROUBLE SHOOTING
SECTION 8. OPTIONAL ACCESSORIES
SECTION 9. INTERNAL VIEWS
SECTION 10. RADIO FREQUENCY ALLOCATION.
SECTION 11. BLOCK DIAGRAM
SECTION 12. SCHEMATIC DIAGRAMG................cccccccsseseseeesenereneneneneneneneneneneeeneneneneneneneneneneeeesieeeeees
NOTE:
Before connecting or disconnecting the AC power plug, always be sure to set the POWER switches
of the TS-430S and the PS-430 to OFF.

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[GENERAL]
Transmitter Frequency Range:
Receiver Frequency Range:
Mode:
Antenna Impedance:
Power Requirement:
~ Power Consumption:
Dimensions:
Weight:
[TRANSMITTER]
Final Power Input:
160m - 15m band
10m band
Modulation:
Carrier Supression:
Unwanted Sideband Suppression:
Harmonic Content:
Maximum Frequency Diviation (FM):
Microphone Impedance:
[RECEIVER]
Circuitry:
Intermediate Frequency:
Sensitivity:
Frequency
Mode
Mode
eee, cere) eee
150kHz - 500kHz
“SECTION 1. SPECIFICATIONS
sMN400-eRNOD cue scALEby-ep i> -cHHAMOsaHEE40-cEEEDD-cDUDD-cUUHEO-a4adt0scpbUD=UUUDD-<¥EN40-408000-cOUOD NOHO anNnRo=eEEEE-cHOUH-eMtONO=«HHMEDaOnaRO=CO8EEO<cEEEOD-cUKUO-<MHEEDcOLUD-c4OMEO-CREDEDCOQGUD-cgUUD-cBHNHO-CHHHED-LE000D-c0UUD-ctNAROeEOBE-UMHADHE08U0-c00O0-oH4HH0-H
160, 80, 40, 30, 20, 17*, 15, 12 *
150 kHz to 30 MHz
A3J (LSB, USB), A1 (CW), A3 (AM), F3 (FM)
A3J (LSB, USB), A1 (CW), A3 (AM), F3 (FM
12.0 to 16.0 V DC (13.8 V nominal)
20A approx. in transmit mode
1.2A approx. in receive mode
270 (10.6)W x 96 (3.8)H x 257 (10.1) D mm (inch)
6.5 kg (14.3 Ibs.)
, 10 meter Amateur bands
OPTION)
250WPEP 200WDC 60W
250WPEP 200WDC 1 20w 60W
Sse = Balanced Modulation
= Variable Reactance Direct Shift
(with FM-430 optional accessory)
AM =Low Level Modulation (IF stage)
Better than 40 dB
Better than 50 dB
Less than -40 dB
+5 kHz (with FM-430 optional accessory)
5002 to 50 kQ
SSB, CW, AM = Double conversion Superheterodyne
FM = Triple Conversion Superheterodyne
1st IF = 48.055 MHz
2nd IF = 8.83 MHz
3rd IF = 455 kHz (FM only)
500kHz - 1.8MHz 1.8MHz - 30MHz
SSB/CW(10 dB S/N)
Less than 1 uV
Less than 4 wv Less than 0.25 uwV
AM(10 dB S/N)
Less than 13 uV
Less than 40 uV Less than 2.5 uv
FM (30 dB S/N)
= = *Less than 1 uV
FM (12 dB SINAD)
Image Ratio:
IF Rejection:
Selectivity:
Selectivity
- - *Less than 0.7 uV
* with FM-430 optional accessory
More than 70 dB (1.8 to 30 MHz
More than 50 dB (FM-3rd image ratio)
More than 70 dB (1.8 to 30 MHz
SSB/CW
AM *1
FM *2
* 1 with YK-88A optional filter
* 2 with FM-430 optional accessory
Frequency Stability:
Frequency Accuracy:
RIT Variable Range:
Audio Output Impedance:
Audio Output Power:
Better than + 30 x 10-6 (0°C to +50°C), Within + 200 Hz from 1 to
60 minutes after turn-on: within + 30 Hz any 30 minute period
thereafter
Better than 10 x 10-*
More than + 1 kHz
4Qto 162
More than 1.5W across 8.2 (at 10% distortion)
Note: Circuit and ratings subject to change without notice due to developments in technology.

150 kHz - 30 MHz GENERAL COVERAGE RECEIVER
ALL MODE OPERATION
Operating mode include USB, LSB, CW, and AM, both
transmit and receive, with FM optionally available
using the FM-430 frequency modulation unit (installs easi-
ly inside the transceiver). Mode selection is made
by front panel mode keys with adjacent LED indicators.
SUPERIOR RECEIVER DYNAMIC RANGE
The receiver front-end has been carefully designed to pro-
vide an exceptionally wide dynamic range, through
the use of 2SK125 junction-type FET’s in the RF amplifier
and balanced mixer circuits.
DUAL DIGITAL VFO's
@ 10 Hz step dual digital VFO’s include band and mode
information, allowing split frequency or cross-band
operation.
@ A STEP switch is provided to permit tuning in 10 Hz
(10 kHz/revolution of the tuning knob), or 100 Hz (100
kHz/revolution) steps.
@ AnA=B switch is provided to bring the idle VFO to the
active VFO mode and frequency.
@ A VFO LOCK switch is provided.
@ The RIT control allows shifting the receive frequency in
either VFO or memory mode operation.
EIGHT MEMORY CHANNELS
@ Each memory stores frequency, mode and band infor-
mation.
@ The memory CH 8 stores both a receive and a transmit
frequency for split-frequency memory operation.
@ A front panel MR switch is provided to allow the opera-
tor to operate each of the eight memories as an inde-
pendent VFO, or as a fixed frequency.
LITHIUM BATTERY MEMORY BACK-UP
All memory and VFO information are backed-up by an in-
ternal lithium battery (estimated 5 year life).
MEMORY SCAN
Scans only those memory channels in which data is
stored. The scanning time is approximately 1.8 sec. for
each channel, with a HOLD switch provided to interrupt
the scan.
PROGRAMMABLE BAND SCAN
Scans within the programmed band width.
Memory channel 6 establishes the lower band scan limit,
memory channel 7 the upper limit. The HOLD switch in-
terrupts the scan. Scan speed is externally adjustable.
AUTOMATIC ANTENNA TUNER CONTROL
The band selection of the automatic antenna tuner
AT-250 and TS-430 is possible.
4
Se hh la ea a
SECTION 2. FEATURES i
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IF SHIFT CIRCUIT
The apparent IF passband may be shifted to place interfer-
ing signals outside the passband, while keeping the de-
sired signal optimally placed for best signal-to-noise ratio.
TUNABLE NOTCH FILTER
SPEECH PROCESSOR
The speech processor uses an audio compression ampli-
fier and change in the ALC time constant, resulting in sub-
stantially increased “talk-power”.
ALL SOLID-STATE
The TS-430S runs 250W PEP input on CW, on 160-10
meters. In the AM mode, it runs 60W input, all
bands. In the FM mode (optional FM-430 unit installed), it
runs 120W input. A built-in cooling fan, plus other protec-
tion circuitry assures maximum final amplifier reliability.
Both the receiver and the solid-state wide band final am-
plifier requires no tuning.
NOISE BLANKER
An effective noise-blanker eliminates pulse-type interfer-
ence such as ignition noise.
RF ATTENUATOR
The carefully designed receiver front-end includes a
switchable 20 dB RF attenuator for intermodulation distor-
tion rejection.
VOX CIRCUIT
Both VOX and push-to-talk operation available. VOX gain,
delay and anti-VOX controls are located on top of the ca-
binet, for easy adjustment. Semi-break-in operation avail-
able in CW, using the built-in sidetone oscillator.
RUGGED CONSTRUCTION AND STYLING
The TS-430S is styled to enhance the appearance of any
fixed or mobile station, while providing maximum ease of
operation through a functional layout of the controls.
BUILT-IN SQUELCH CIRCUIT EFECTIVE FOR ALL
MODES
OTHER FEATURES
@ Meter reads S in receive, IC or ALC in transmit.
@ An audible “beep” from the speaker confirms key entry
operations.
@ Indicators provided for VFO A/B, ON AIR, F.LOCK,
F.STEP, RIT, NOTCH, M.CH, and MODE.
VFO dial drag externally adjustable.
Remote terminal provided for linear amplifier control.
Accessory terminal provides band information.
Transverter terminal is provided on the rear panel.

SECTION 3. PREPARATION FOR USE
INTERCONNECTION
Connect the transceiver as illustrated in Fig. 3-1, 3-2.
Microphone
TS-430S
Either
a
low
or
high impedance
Se
microphone
(5002
to 50
ks)
can
be
used.
The
P.T.T.
switch
should
be
isolated_from
the
mic
circuit
(shown
in
[A]).
Use
a
mi-
crophone
with
a
separate
switch
and
MIC
line
so
both
P.T.T.
and
VOX
are
available.
Headphones
Use headphones of 4 to 162
impedance. The optional
HS-5 or HS-6 headpone are
best suited for use with the
TS-430S
Stereo-type headphones can
also be used.
{a}
Tranetormer (OPTIONAL) — View from cord side
ule, | = eee —@vup
REMOTE connector
External accessories can be con-
nected to the TS-430S through
‘aims
Sieur
INPUT)
@®
vown
Key
the
REMOTE
connector.
The
PTT
Teanstorme
3
@
stBy
For
CW
operation,
connect
terminal
can
be
used
for
remote
3
—©
GND
(MIC)
@
@®
mic
four
key
to
the
KEY
jack
at
control
of
transmit/receive
opera-
sevooron
)
3]
z=
® Gno«sTBy)
Mes
fear
Dae
shielded’
Lenny
tion.
1b)
note
tt ACCESSORY connector
Micropnone
[)
&3|
aa
&
_
a
es
Accepts
automatic
antenna
|
Tramslormer
Tce
ercc(Goe-
tuner
AT-250.
P
—o
GND terminal
It is recommended that a ground .
lead be connected to the GND
terminal at the rear of the set to
prevent the possibility of electric used. Connect to the
shock, TVI and BCI. Use as short , rear EXT SP jack us-
and heavy a lead as possible. ing the supplied plug.
External speaker
Besides the built-in
speaker, an external
speaker can also be
Lightning arrester For fixed station antenna installation, To AC outlet
see Page 19.
TS-430S
Black -Grey Red-White
OC power terminal
For mobile antenna installation.
see page 18.
Connect battery to DC power
terminal. For detailed in-
structions, see Page 17.
Note: Use either
battery or regulat-
ed supply. but not
both.
12V
Battery
Fig. 3-2 Antenna and Power Supply Connection for TS-430S

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4.1 FRONT AND TOP PANELS
(TS-430S shown)
@ POWER switch
This switches the TS-430S ON and OFF.
Before operating the POWER switch, confirm that the VOX
@ is off, and the STANDBY switch @ is set to the recep-
tion mode (REC).
@ METER
The meter has three functions, two being selected by the
METER switch. In receive the meter is automatically an S-
meter showing receive signal strength on a scale of 1 — 9,
+20, +40 and +60 dB. In transmit, the meter shows IC or
ALC level, depending on METER switch position.
® VFO indicators
VFO A indicator lights when VFO A is operating. VFO B
indicator lights when VFO B is operating.
@ Digital display
The digital display indicates true operating frequency in all
modes to an accuracy of 100 Hz.
© M.cH (Memory Channel) display
Indicates memory channel 1 - 8 or P, program scan.
@ FUNCTION switch
This selects the VFO which will control receive and trans-
mit frequencies. Select position A or B for normal opera-
tion. A-R and B-R are used for split frequency or cross-
band operation.
A-R: VFO A operates during reception and VFO B during
transmission.
A: | VFOA operated, VFO B stands by.
B: VFO B operates, VFO A stands by.
B-R: VFO B operates during reception and VFO A during
transmission.
AF -9-AF
L7/
ea
HM BANO MMMM “IMH: ster RIT
ATT NOTCH
@ MEMORY CH selector
This
selects
one
of
the
eight
memory
channels.
To
write
in
a
frequency
depress
the
M.IN
switch
and
the
displayed
frequency
will
store
in
the
selected
channel.
To
recall
from
a
memory
channel,
select
the
channel
and
depress
the
MR
switch.
® NOTCH control
Turn
the
NOTCH
switch
®
ON
to
activate
the
notch
filter.
Adjust
the
notch
frequency
to
null
beat
(carrier
interfer-
ence)
signals.
@ SQUELCH control
The
squelch
control
is
used
to
eliminate
noise
during
no
signal
time.
This
control
may
be
adjusted
clockwise
until
the
noise
disappears
(threshold
level).
The
control
func-
tions
for
all
modes;
SSB,
AM
and
CW.
In
the
FM
mode,
squelch
functions
only
when
the
optional
FM-430
is
in-
stalled.
@® Indicators
ON
AIR
indicator:
This
lights
during
transmission
mode.
F.LOCK
(Frequency
lock):
Lights
when
the
F.LOCK
switch
@
is
ON,
indicating
the
VFO
operating
frequency
is
locked.
F.STEP
(Frequency
step):
Lights
when
the
STEP
switch
@
is
ON,
indicating
a
fast
VFO
tuning
rate.
RIT
(Receiver
Incremental
Tuning):
switch
@
is ON.
NOTCH:
Indicates
the
notch
filter
is
operating
and
lights
when
the
NOTCH
switch
@
is
ON.
@® STAND-BY switch
This switch selects:
REC:
The
transceiver
is
receiving
unless
the
microphone
PTT
switch
or
the
VOX
circuit
is
activated.
Indicates the RIT

SEND: Locks the unit in transmit. Transmission is
locked out (reception only) if the selected transmission
frequency is outside the amateur radio bands, or the
final stage thermal-protects (is deactivated due to ex-
cessive heat-sink temperature).
@® VOX switch
Turn this switch on to activate the VOX (Voice Operated
Xmit) during SSB, AM or FM operation or to allow semi-
break-in CW operation.
@® PROC (Speech processor) switch
This switch is used during SSB or AM operation. At
switch ON the speech processor will be activated, increas-
ing average “talk power”.
@® METER switch
During transmission, the meter switch determines meter
function. The switch selects between:
ALC - The meter monitors the output of the final stage
power amplifier during transmission. During SSB opera-
tion, adjust the MIC control so that the meter pointer is
within the ALC zone. Similarly, adjust the CAR control for
CW operation. ALC does not indicate in the AM or FM
mode.
IC - The meter monitors final stage collector current.
12-19A is normal, 17A typical.
® NAR/WIDE switch
This switch selects receive IF bandwidths when optional
filters are installed.
The WIDE position provides the same IF bandwidth for
both CW and SSB. For the NARROW position, optional
filters are available for both CW and SSB. In the AM
mode, the SSB filter is on in the narrow position.
@® MIC (Microphone) connector (8-pin)
Microphone audio input. Frequency UP/DOWN control
and PTT lines are included. The MC-42S or MC-60A mi-
crophones (optional) are recommended. MIC connector
pin assignments are shown below.
GND MIC @
@®GND Connection
(STBY)
FRONT VIEW
@ PHONES jack
The headphone jack allows use of 4 —- 16 ohm (or greater)
impedance headphones. HS-5 or HS-6 optional head-
phones provide optimum results. Stereo-type headphones
can also be used. Headphones will disable the internal or
external speaker.
@® MIC (Microphone gain) control
This control adjusts microphone amplifier gain for SSB
and AM operation. In the SSB mode, adjust for an on-
scale ALC reading at voice peaks. For low power opera-
tion, adjust this control below the ALC range. For AM
mode adjustment, see “AM transmission” page 11.
@® CAR (CARRIER LEVEL) CONTROL
This controls carrier level during CW operation. Adjust the
carrier level for an on-scale ALC meter reading. For low-
power operation, adjust this control below the ALC range.
@® MODE switches and indicators
These switches are used to select the mode; USB, LSB,
CW, AM or FM (optional). Each indicator lights corre-
sponding to the mode.
@ Tuning Knob
This knob controls the dual digital VFO’s which operate in
10 Hz step at 10 kHz turn for normal slow tuning, or with
the STEP switch depressed, at 100 Hz step for fast tun-
ing.
@® Keyboard
@ A=B switch: Depress this switch to equalize the fre-
quency and mode of the idle VFO to that of the operat-
ing VFO.
@ LOCK switch: This electrically locks the VFO fre-
quency. When this switch is on, the tuned frequency
does not vary when either the tuning knob or BAND
switch is operated. This is convenient when operating
on the same frequency for extended periods. The RIT
does operate with the LOCK switch on. The F.LOCK in-
dicator lights to show operation.
@ STEP switch: Used to select the VFO tuning rate.
@ M.CH (Memory channel) switch: Used to select a me-
mory channel as a fixed frequency. With this switch
ON, the channel number is displayed on the M.CH dis-
play @.
@ MR (Memory recall) switch: Depress to recall a select-
ed channel from memory to the VFO for tunable opera-
tion.
@ M.IN (Memory in) switch: Depress to store the dis-
played VFO frequency in to a selected memory channel.
@ MS (Memory scan) switch
Depress this switch for memory scan operation.
Only channels with stored data are scanned. Scan rate
is fixed at approximately 1.8 sec./channel.
@ PG.S (Program scan) switch
Depress this switch to scan from the frequency stored
in CH 6 to the frequency stored in CH 7. Programmed
Scan Speed is adjustable. However, the presence of a
signal does not stop the scan.
@ HOLD (Scan hold) switch
Depress this switch to stop the scan operation. Reset-
ting this switch to OFF resumes the scan operation.
@® BAND selector switches
Used to select the amateur or frequency band. When the
UP or DOWN switch is pressed, the band changes by one
step.
® 1 MHz step switch
When depressed ON, this allows the band switch to raise
or lower the frequency in 1 MHz steps within the trans-
ceivers full frequency range. At OFF (out) the Band switch
steps the amateur band.

® RIT switch
This push switch turns the RIT (Receiver Incremental Tun-
ing) circuit ON and OFF. With the switch depressed, the
circuit is activated and the RIT indicator is illuminated, al-
lowing the receive frequency to be shifted by about 1
kHz independent of the transmit frequency by using the
RIT control. The RIT circuit is turned OFF when the switch
is out.
@® NB (Noise Blanker) switch
This switch is used to reduce pulsating type ignition
noises usually emitted from motor vehicles. Power-line,
QRM and atmospheric “white” noise will not operate the
noise blanker.
@ RF ATT (Attenuator) switch
With this switch ON, a 20 dB attenuator is inserted in the
antenna circuit, protecting the RF amplifier and mixer from
overload on strong input signals.
® NOTCH switch
This switch controls the NOTCH circuit and indicator.
® RF GAIN control
This adjusts receiver RF amplifier gain. Turn fully clock-
wise for maximum gain and a correct S-meter reading.
@ AF GAIN (Audio Frequency) control
This control adjusts the receiver audio output level. Vo-
lume increases as the control is turned clockwise.
@ RIT control
When the RIT switch is ON, this will vary the receive fre-
quency by about 1 kHz. When the control is set to the
“OQ” center position, there is no frequency shift.
@ IF SHIFT control
By using this control, the IF crystal filter center frequency
can be shifted about 1 kHz, allowing adjustment of tone
quality, or eliminating interference from adjacent frequen-
cies. For normal operation, this control should be set to
the center “O” position (at the detent).
® VOX controls
VOX GAIN: This controls sensitivity of the VOX (Voice
operated Transmit) circuit. Adjust the gain for consistent
key-over by voice, but not back ground noise.
DELAY control: This controls hold time for VOX, or CW
semi-break-in operation. Adjust to hold the transmitter on
between words, at a normal speech, or keying rate.
ANTI-VOX control
This control is used to adjust the VOX system so that it is
not false tripped by sound from the speaker.
@ PG.SCAN (Program scan) control
This adjusts program scan speed.
4.2 REAR PANEL
@ ANT (Antenna) connector
This UHF connector should be attached to a suitable an-
tenna for transmitting and receiving. The antenna cable
should be 50-ohm coax, terminated with a PL-259 con-
nector.
@ X. VERTER (transverter) terminal
This 8 Pin DIN connector is used to interface a VHF or
UHF transverter.
See page 23 for pin-outs.
© GND (Ground) terminal
To prevent electric shock, as well as RFI and BCI, connect
the transceiver to a good earth ground.
© EXT. SP (External speaker) jack
The receiver audio output can be connected through this
jack to an external 4 to 16 ohm speaker. The internal
speaker is disconnected when an external speaker is con-
nected.
© cw key jack
Using shielded line, connect a key to this 1/4” phone jack
for CW operation. Key open-terminal voltage is approxi-
mately 9V DC.
@ REMOTE connector
This connector is used to interconnect a linear amplifier or
other accessory item.
@ acc (Accessory) connector
This connector is used to access the automatic antenna
tuner AT-250. Refer to page 22.
© DC POWER connector
This is used to connect the DC power supply.

tc wive
MIC-@-CAR
PHdhes “A G
@ Connect mic
fully counterclockwise
MAN
SECTION 5. OPERATION
Both CAR and ante the mode
nent
Centered
AF: Fully counter
clockwise
® Select band
Fig. 5-1 Initial Control Settings
5.1 RECEPTION
5.1.1. RECEPTION
First connect the antenna, microphone and key. Then, set the
controls and switches referring to Fig. 5-1.
Acertain that the TS-430S is ready for operation, then turn the
POWER switch ON. The meter and digital display will illumin-
ate, indicating the transceiver is in operation. The transceiver is
fully solid-state, allowing reception as soon as the POWER
switch is switched ON.
Advance the AF GAIN control clockwise until some receiver
noise is heard from the speaker. Turn the main tuning control
so the desired signal can be heard clearly.
5.1.2. RF ATT SWITCH
The input to the receive RF amplifier is attenuated approxi-
mately 20 dB, providing distortion-free reception. This feature
may be used in cases of receiver overload, caused either by a
strong local signal, or during weak signal reception when a
strong adjacent signal may blank the receiver.
5.1.3. NB SWITCH
The TS-430S has a sophisticated noise blanker designed to re-
duce ignition-type pulse noise. The noise blanker is particularly
important for mobile operation. When necessary, activate the
noise-blanker by depressing the NB switch ON.
5.1.4. RF GAIN CONTROL (Fig. 5-2)
For normal operation, this control should be turned fully clock-
wise for maximum sensitivity. Receive sensitivity is reduced by
turning the control counterclockwise.
Adjust the RF GAIN so the S-meter does not show excessive
deflection. This minimizes noise during reception and allows
the S-meter to indicates signal peak (or a little below that
point). Noise is markedly reduced when signal is absent.
S-meter peak point
AF GAIN—@— AF GAIN
6
S-meter reading Full
Signals below at partial counter- Clockwise
this level are clockwise position position
of RF GAIN control
AF GAIN-@— RF GAIN
6
attenuated
g, Turn
counter-
clockwise
10
Fig. 5-2 RF GAIN Control Operation

5.1.5.1. SQUELCH
To eliminate receiver noise at the no-signal condition,
slowly advance the squelch clockwise until the noise just
disappears (threshold point).
The squelch will open and the speaker will operate when a
signal is received. If the signal is weak or fades, readjust
the squelch for consistent reception.
5.1.5.2. NOTCH CONTROL
If a single tone such as a CW signal is superimposed on
the receive signal, turn the NOTCH ON and adjut the
NOTCH control to eliminate or minimize the beat signal. A
beat of approximately 900 Hz can be eliminated at the
center position of the control. The NOTCH is effective bet-
ween 350 and 2600 Hz.
’
Racenie
Interfering
Receive
Interfering
signal
signal
attenuated
signal
signal ~ by NOTCH
Audio output
(NOTCH ON)
Audio output
(NOTCH OFF)
Notch Control
5.1.6. RIT CONTROL
By using the RIT (Receiver Incremental Tuning) control, the
receive frequency can be shifted by about + 1 kHz with-
out changing the transmit frequency.
If the frequency of the station you are working changes,
your receive frequency can be reset by turning the RIT
switch ON and adjusting the RIT control. Adjusting the
control clockwise increases the frequency. When first
calling another station, the RIT should be OFF, otherwise
your transmit and receive frequency will not coincide.
5.1.7. IF SHIFT CONTROL
The IF SHIFT control is used to shift the passband of the IF
filter without changing receive frequency. By turning this
control in either direction, the IF passband is shifted as
shown in Fig. 5-3.
The IF SHIFT is effective in eliminating interference when
nearby signals are superimposed on the receive signal dur-
ing either SSB or CW operation. IF SHIFT does not oper-
ate in the AM or FM modes.
(1) USB Mode (10 MHz and above)
Adjust the IF SHIFT control in the + direction and lower
frequencies are cut. Adjust the control in the — direction
and high frequencies are cut.
(2) LSB Mode (7 MHz and below)
Adjust the control in the + direction and higher frequen-
cies are cut. Adjust the control in the — direction and low
frequencies are cut.
(3) CW Mode
By using the IF SHIFT in conjunction with the RIT, tone
quality can be adjusted.
10
Turned in © direction Turned in @ direction
IF filter passband
ea characteristic aa
Signal
Interfering
signal
Interfering
signal
RIT—@>-
IF
SHIFT
RIT—@>-
IF
SHIFT
RIT
—@>
IF
SHIFT
fe
=
V4eN
5S
2)
Oe
ae)
®
oO
®
Turn in © direction
to eliminate inter-
ference from signal
Turn in @ direction
to eliminate inter-
ference from signal @
Fig. 5-3 IF Shift Control
5.1.8. NAR-WIDE switch operation
For short to medium distance communication, the WIDE
position may be used for both SSB and CW operatin. For
DX (long distance) communication, the NAR position wil
be an advantage in reducing interference.
This feature, in combination with the IF SHIFT control, will
provide outstanding interference rejection. The receive IF
bandwidth is 2.4 kHz in the SSB and CW wide position,
270 or 500 Hz for CW (with optional filters YK-88CN or
YK-88C) and 1.8 kHz for SSB (with optional filter
YK-88SN), in the NAR position.
*In the AM MODE without an optional filter, both WIDE
NARROW positions are 2.4 kHz. With a YK-88A, Wide is
6 kHz, and Narrow is 2.4 kHz.
*In transmit bandwidth is automatically WIDE.
PASSBAND WIDTH (-6 dB) kHz
cw SSB
NARROW NARROW
No optional filter i ™
YK-88C or CN
YK-88SN
YK-88A
NOTE:
1. Without optional filters, there is no SSB or CW recep-
tion in the NAR switch position (*).
2. The NAR/WIDE switch does not function in the AM, FM
mode.
3. Without an optional filter, the AM mode bandwidth is
2.4 kHz.

5.2 TRANSMISSION (Fig. 5-4)
CAUTION:
Before transmitting, be sure to connect an antenna or
dummy load with a VSWR of less than 1.5:1. Never at-
tempt to transmit with the antenna terminal left open.
. When testing the transmitter, use a 50-ohm dummy load,
rated at greater than 100W (TS-430S). Refer to Fig. 5-1
for initial control settings. When the TS-430S is ready for
transmission, use the following procedures:
TS-430S
Power meter
Dummy load
Fig. 5-4 Testing with Dummy Load or
Power Meter |
5.2.1 SSB Operation
1. Set the MODE switch to SSB.
2. Meter switch to ALC.
3. Standby switch to SEND.
4. Speak into the microphone and adjust the MIC GAIN for
meter deflection within the ALC zone at signal peaks.
5. For QRP (Low Power) operation, use less MIC GAIN and
consult your external wattmeter for output level.
5.2.2 AM Operation
1. Set the MODE switch to AM and the meter switch to
Ic.
2. Place the STANDBY switch to SEND and adjust the
CAR control so the meter registers approximately 2/3
its usual deflection.
3. Speak into the microphone and advance the MIC GAIN
control so the meter deflects only slightly at peaks.
Note that excessive meter deflection indicates overmo-
dulation.
4. The PROC may be used to provide a more constant mo-
dulation level.
5.2.3. PROC (processor) operation
In DX (long distance) SSB or AM operation, it may be de-
sirable to increased talk-power by using the speech pro-
cessor.
The speech processor in the TS-430S combines an audio
compression amplifier with changes in ALC time constant
to provide extra audio punch and increases average SSB
output power, while suppressing sideband splatter. To
activate, turn on the PROC switch, and readjust MIC gain.
Operated as described, distortion will be minimal. How-
ever, tone quality will be affected. It is therefore advisa-
ble to conduct normal operation with the processor dis-
abled.
NOTE:
When a high-output microphone is used, input overload
and distortion may result.
To prevent this, use an attenuator in the microphone cir-
cuit as shown below, or connect a 10 - 33kQ resistor (de-
pending on the microphone used) across the microphone
input. (Mic control setting should be approximately 12 o’-
clock)
10k
—
33
k®
(depending
on
micropone
used.)
from microphone to the MIC connecter
10 k2
The
MC-60A
microphone
is
recommended
(Microphone
sensitivity:
-55
+3dB
for
approx.
5
cm
distance
to
the
mic).
The
MC-60A
MIC
AMP
Switch
should
be
set
at
the
OUT
position.
5.2.4 CW Operation
1.
Set
the
MODE
switch
to
CW
and
the
meter
switch
to
ALC.
2.
Set
the
standby
switch
to
SEND
and
adjust
the
CAR
control
so
the
meter
deflects
within
the
ALC
zone.
If
a
key
is
connected,
it
should
be
depressed
during
the
ad-
justment.
3.
For
QRP
operation,
adjust
the
Carrier
Control
below
the
ALC
point.
NOTE:
Full
power
operation
(more
than
5
minutes
at
ambient
temperature
of
25°C,
in
case
of
10
MHz
band,
more
than
30
seconds
because
of
final
efficiency),
with
the
key
kept
depressed
may
result
in
unit
trouble.
At
this
time,
pay
attention
to
installation
condition
as
well
as
ambient
tem-
perature,
and
decrease
the
power
or
operate
the
unit
after
an
interval.
5.2.5
FM
Operation
(With
FM-430
FM
unit
installed)
1. Place the MODE switch to FM.
2. Place the STANDBY switch to SEND.
3.
Speak
into
the
microphone.
(In
the
FM
mode,
the
MIC
GAIN,
CAR
and
meter
switches
are
not
used.)
11

5.2.6. FINAL STAGE PROTECTION
The TS-430S features a VSWR protection circuit to pro-
tect the final-amplifier transistors.
Three different protection circuits are used.
1. The final-stage transistors are protected by detecting
VSWR of the antenna system and automatically low-
ering transmitter output power if the VSWR is too
high.
2. When the heat-sink temperature rises, a detection cir-
cuit activates a cooling fan. Under normal conditions,
this cooling fan sufficiently cools the heat sink.
3. The heat-sink temperature could rise abnormally dur-
ing long transmissions, if the area adjacent to the
heat-sink is blocked. In this case, the transmission is
inhibited until the heat-sink cools to the proper tem-
perature.
NOTES:
1. If transmitter output decreases due to activation of the
protection circuit caused by high VSWR, carefully re-
check and retune the antenna system.
2. When the cooling fan starts to operate, determine that
adequate air flow is possible in the heat-sink area.
@ Operation of the Cooling Fan
The cooling fan operates when the heat-sink temperature
rises to approximately 50°C (122°f) and ceases to operate
when the temperature decreases to normal, approximately
40°C (104°F). The heat-sink is made of die-cast aluminum
and is actually the rear panel. It must be kept clear of sur-
rounding objects to allow heat to dissipate easily.
The cooling fan is designed to operate when the heat-sink
temperature is at a specific level, regardless of whether
the unit is in transmit or receive mode.
5.2.7. MIC GAIN CONTROL (Fig. 5-5)
This control adjusts the microphone input level. When us-
ing the TS-430S in a voice mode, connect a microphone
and set the STANDBY switch to SEND (an antenna or
dummy load must be connected).
For SSB operation, set the meter switch to ALC and speak
into the microphone. Adjust the MIC GAIN control so the
meter does not deflect out of the ALC zone at signal
peaks.
The TS-430S accepts either a low or high impedance mic-
rophone (500 2 to 50 kQ). When using a low impedance
microphone (500 ) the MIC GAIN control should be ad-
vanced slightly higher than when a high impedance micro-
phone is used, while observing the ALC meter.
12
@ ALC (Automatic Level Control)
The ALC monitors the transmitter final stage output to
minimize distortion in your transmitted signal. It automati-
cally adjusts output to an optimum level.
Pointer should not deflect beyond ALC zone at signal peaks.
Fig. 5-5 ALC Adjustment
5.3 VOX OPERATION
5.3.1. VOX SWITCH
VOX (voice operated transmit) is used to switch the
TS-430S into transmit mode by your voice. Place the
VOX switch ON and speak into the microphone. The
transceiver automatically switches to transmit mode (the
MIC control should be adjusted in advance as explained in
Item 5.2.7), Both the SEND switch and the MIC P.T.T.
switch are left in the REC position.
5.3.2. VOX GAIN CONTROL
This adjusts the VOX circuit sensitivity. Speak into the mi-
crophone at a normal voice level and adjust the control.
Increased sensitivity allows transmission with a lower
voice level. Transceiver operating condition (receive or
transmit) can be checked by the ON AIR LED.
Note that if the control is advanced too far, the VOX circuit
may be “tripped” by ambient noise.
5.3.3. ANTI-VOX CONTROL
This prevents the VOX circuit from being false-tripped by
sound from the speaker.
Adjust the control so the VOX will not operate at the de-
sired speaker volume level.

5.3.4. VOX DELAY CONTROL
This control adjusts the VOX circuit transmit hold time. If
the hold time is too short, the transceiver will return to re-
ceive mode as soon as you stop talking into the micro-
phone. This can be eliminated by advancing the control.
Adjust the control for comfortable operation at a normal
rate of speech.
5.4 SEMI-BREAK-IN OPERATION
The TS-430S has a built-in side-tone oscillator which,
used in conjunction with the VOX circuit, allows semi-
break-in operation, besides the conventional (SEND switch
controlled) CW operation. During semi-break-in operation,
the transceiver is placed in transmit mode when the key is
depressed, and returns to receive mode when the key is
released. The VOX circuit is activated by the side-tone.
For semi-break-in operation, set the VOX switch ON and
the MODE switch to CW. Adjust the VOX GAIN to insure
that the transceiver is set in transmit mode whenever the
key is depressed. Also, adjust the VOX DELAY for the de-
sired hold time.
ANTI VOX adjustment is not required.
NOTES:
In VOX operation (semi-break-in) with VFO A/B or
transmission/reception memory (CH8), the following
combination is not possible by the circuit configur-
ation.
RX TX
ANY VOICE MODE | CW (Semi-break-in)
LSB, USB (VOX)
Any voice mode
vox
5.5 OPERATION WITH A LINEAR
AMPLIFIER
The remote connector on the rear panel provides for inter-
connection with an amplifier. See the amplifier instruction
manual to determine whether the linear requires a normal-
ly opened or normally closed (during receive) relay con-
tact. Connect the amplifier control line to either pin 5
(N.C.) or pin 4 (N.O. during receive). Connect the Ground
(Shield) of the Control Line to Pin 2. Connect amplifier
ALC to pin 6 of the remote connector. The TS-430S out-
put is quite adequate to drive most amplifiers to full rated
output.
For full details, see section 6.8, page 22.
5.6 CW OPERATION
For CW operation, your transmit frequency should be
“zero-beat” to the transmit frequency of the station you
are contacting. This also allows your contact to receive
your signal without having to retune his receiver. Tuning
methods are detailed in the following paragraphs.
Your
frequency
Displayed
frequency
Receiver
carrier
frequency.
I
Transmit-Receive
frequency
(BFO)
SS
(Displayed
frequency)
800Hz
Beat note
Fig. 5-6 Tuning for CW Operation
NOTE:
1. In CW mode, transmit frequency is displayed when
both transmitting or receiving.
2. During CW operation, operating the BAND switch
differs from other modes; for example, pressing the UP
(BAND) switch at display frequency 14,000.0 shows as
follows.
14,000.0 > 14,500.0 > 18,500.0....+UP
10,500.0 — 14,500.0 DOWN
5.6.1. OPERATION WITHOUT AN OPTIONAL
CW FILTER
Set the IF SHIFT control to its center position and the RIT
switch OFF. Adjust the main tuning control for an 800-Hz
beat note and your transmit frequency will then coincide
with that of your contact station (zero-beat”). During re-
ception, the side-tone monitor is activated by pressing
down the key (VOX OFF). In this case, listen to the side-
tone superimposed on the receive signal and adjust the
main tuning for similar side-tone and incoming CW audio
tone. By so doing, transmit frequencies will coincide.
You may now adjust the RIT for a pitch which suits your
preference. If interference is encountered, adjust the IF
SHIFT. For more convenient and effective CW operation,
use of the optional YK-88C or YK-88CN CW crystal filter
is recommended.
13

5.6.2. OPERATION WITH A CW FILTER
Set the IF SHIFT to its center position and the RIT to OFF.
Adjust the main tuning control for maximum deflection of
the S-meter. Receive signal pitch will be about 800 Hz, in-
dicating correct tuning. O ‘©
5.6.3. KEY CONNECTION F~
Your key should be connected as illustrated in Fig. 5-7.
When using an electronic keyer, make sure that polarity is
set for positive. Always use shielded line from the key to
transceiver.
GND
Before connecting, check that the
polarity is correct. The KEY jack
provides +9V. Use shielded
cable
Fig. 5-7 Key Connection
5.7 Keyboard function
Depress to recall a memory channel. Se-
lect the channel with the M.CH switch.
Brings the idle VFO frequency and mode
to that of the active VFO. Depress to scan the memory channels,
p
Scans
the
range
between
CH
6
fre-
Locks
the
operating
frequency.
quency
and
GH
feequency
Switches to RAPID frequency step for VFO
step tuning or program scanning. Step is
10 Hz in the normal position, and 100 Hz
in the ON position.
Holds scan. During program scan hold,
frequency can be tuned with the VFO
control and the mode can be switched.
Inputs both frequency and mode into a
When this switch is depressed, the chan-
selected memory channel (CH’s 1-8).
nel selected by the M.CH switch is re-
called to the VFO for tunable operation.
The mode can also be controlled when
recalled by the MR switch.
<pasingien unwanteddreduencytam decd @ Depress the M.CH switch, and place the M.CH switch
Unwanted memory content can be erased. fo the unwanted’memory channel
1. Depress the M.CH switch, and select the channel to be
erased with the M.CH switch.
2. Simultaneously depress the BAND switch (either UP or ace
DOWN), and the M.IN switch. 14.195.G pe
3. The display will clear, and only the decimal points will Orstee FORT OnoTcH
display. All mode indicators will remain off. RIT -@>IF SHIFT
AF -@>RF
IMHz STEP RIT NB ATT NOTCH
@ Simultaneously depress the BAND switch, and the
M.IN switch.
14

@ M.CH (Memory channel) operation
The
TS-430S
has
eight
memory
channels.
The
memory
@®
These
switches
are
for
permits input of both frequency and mode, and this data recalling memory.
will be permanently retained (by the built-in lithium bat- @ Select a memory channel.
tery).
1. The M.CH switch selects the desired channel from CH
1-8.
2. When the M.IN switch is depressed, a “beep” sounds,
indicating memory input.
3. There are two recall modes for memory channel con-
tents.
* Depress the M.CH switch. Any one of eight channels
can be selected by the M.CH switch as a fixed (non-
tunable) frequency and mode.
* Depress the MR switch. The channel designated by
the M.CH switch is recalled to the VFO for tunable oper-
ation. The memory contents are not changed.
RIT-@-IF SHIFT AF -@>RF
@ Store the memory.
@ Memory scan operation
1. Input frequencies and modes to be scanned into the
memory channels.
2. Depress the MS switch. The channel number and fre-
quency of each occupied channel is displayed. Scan in-
terval is approximately 1.8 seconds per channel.
3. When the desired traffic is received during scan, de-
press the HOLD switch. 141974.0
4. Scan will resume by releasing the HOLD switch. tox orstee §oRT
@Depress to initiate memory scan.
Displays the memory channel.
Displays the stored frequency. © Stores frequency and
m
NOTES:
1. The channel eight transmit frequency is not scanned.
2. When memories are empty, |/|is displayed and there is
no scan.
3. Scan is held by transmitting, and resumes when the
transceiver returns to the receive mode.
oo8
PUSH ON:
uuoue
@® Depress when desired traffic is received
Release to resume scan.
15

NOTE:
1.
2.
3.
Program scan operation
M.cH
@
When
depressed,
the
letter
|_P_|displays
and
scan
begins.
® This control varies the scan speed (on top cover)
®
Input
the
lower
frequency
limit
and
mode
into
“6”
and
the
upper
frequency
limit
into
“7”.
Loa stam ere
Dvroe
‘tONMOFFT VE TRANSCEIVER OON AIR OFLOCK OF STEP
KENWO\
VOX PROC ALC NAR
PET
ic
@ Depress to hold a frequency. Turn off to contin-
ue scanning.
. Program the scanning frequency range.
. Input the lower (or upper) frequency limit and mode into
CH 6 (using the M.IN switch). Then, input the upper (or
lower) frequency limit into CH7.
. Depress the PG.S switch to initiate scan. The letter P
will display during program scan.
. The scan speed is adjustable using the speed control on
the top panel, along with the STEP switch. Select the
scan speed appropriate for the selected frequency and
mode.
. When the desired station is received and that frequency
is to be held, depress the HOLD switch. Then, adjust
the VFO for best tuning. During hold, the mode may be
temporarily changed. When Hold is released, the mode
will revert to the original programmed mode setting
after one scan cycle.
. After the CH 7 upper (or lower) frequency limit has been
reached, a “beep” sounds and the scan repeats from
the CH 6 frequency.
Program scan is from CH 6 to CH 7, only.
During scan, only the CH 6 mode is used.
During scan or scan hold, a frequency can be stored
into a memory channel selected by the M.CH switch by
depressing the M.IN switch.
. When the scan is on and the STEP switch is depressed,
the step is 100 Hz.
. When CH 6 and CH 7 are empty, there can be no scan.
. Scanning is stopped during transmit and resumed after
return to the receive mode.
16
@ Memory CH 8 reception and transmission operation
1.
Place the M.CH switch to “8”.
2. Input the reception frequency and mode using the M.IN
switch.
3. The usual data entry “beep” is emitted as a pulse train.
Input the transmission frequency (and mode).
4. The “beep” ceases.
5. Depress the M.CH switch. “Split” frequency operation
(transmission and reception on different frequencies
are programmed into CH 8.)
NOTE:
1. Different modes and/or bands can also be programmed
for transmission and reception.
2. If the M.IN switch is depressed twice in succession, this
memory can be used as an ordinary memory, now hav-
ing the same frequency for both transmission and re-
ception.
®
Pressing
this
switch
TWICE
allows
transmission
and
reception
on
different
frequencies.
® Place at “8”.
RIT-@>IF SHIFT AF-@>-RF
NB ATT NOTCH
Hoo)
PUSH ON:
®
Input
the
reception
frequency,
then
the
transmit
frequency.

5.8 MOBILE OPERATION
Being compact in design, this transceiver is ideal for mo-
bile operation. Satisfactory mobile operation is achieved
through proper power and antenna connection, and
thoughtful transceiver installation and adjustment.
5.8.1. TS-430S INSTALLATION
Secure the TS-430S under the dashboard using an option-
al MB-430 mounting bracket as shown in fig. 5-8. As an
alternative, use strapping, making sure that the TS-430S
will not slip out of place while operating the vehicle.
NOTES:
1. Do not install the TS-430S near the heater outlet.
2. Allow sufficient space behind the TS-430S to ensure
proper ventilation.
5.8.2. CONNECTING THE POWER CABLE
When connecting or disconnecting the power cable to or
from the power connector, be sure that the power switch
is always in the “OFF” position. Observe polarity of the ca-
ble. The TS-430S operates on 13.8V DC, negative
ground. Battery polarity must be correct. The power cord
is color coded.:
Loading coil _
Antenna bracket must have
nn
Antenna good metal to metal contact
Antenna bracket
must have good
metal to metal
contact
To antenna terminal
Bumper mounting
bracket
Pass coaxial cable
through the drain hole.
12V
Battery
Since an HF antenna is large and heavy, it must be installed to withstand
high wind stress.
Use short heavy leads
Fuse should be as close to the battery
terminal as possible.
Fig. 5-8 Mobile Operation
Use fuse block, battery acc-
essory position, 20A minim-
um rating
TS-430S
Fuse
Turn POWER switch OFF
before connecting/
disconnecting the power cord
17

POWER CABLE
CAUTION: Observe battery polarity.
TS-430S
Red and White +
Black and gray -
Connect the TS-430S power cable to the battery termin-
als, with consideration to current requirements and noise
prevention. The maximum current drawn by the TS-430S
reaches to between 18 and 20A when transmitting.
Therefore, the cable should be made as short as possible,
using the specified fuse. Also, determine that the power
system of the car (including the battery and generator or
alternator) will handle the increased load of the TS-430S.
Route battery and ANTENNA leads away from all high vol-
tage secondary circuits to prevent ignition noise interfer-
ence.
5.8.3. MOBILE ANTENNA
(1) Antenna Installation
Use a sturdy mount for the mobile antenna since HF an-
tennas are larger (and have more wind load) and are hea-
vier than VHF antennas. A bumper mount is recommend-
ed for general use. The ground side of the mount must be
well grounded to the car body, since the body itself func-
tions as the ground plane for the mobile antenna. (Refer to
Fig. 5-8)
NOTES:
1. Some cars have plastic bumpers. For such cars, ground
the antenna mount to the body.
2. When tuning a newly installed antenna, use the follow-
ing procedure:
@ Turn the CAR control fully counter-clockwise for
minimum transmit power.
@ With the transceiver in transmit mode, raise transmit
power output slowly by rotating the CAR control
clockwise. The antenna should be adjusted with
minimum power.
@ Transmitting with full power is recommended only
after the antenna has been adjusted for a VSWR be-
low 1.5:1.
3. Antenna installation is critical for successful mobile
operation. For further information refer to THE RADIO
AMATEUR’S HANDBOOK, RADIO HANDBOOK, or
other texts.
(2) Coaxial Cable Connection
When the antenna is mounted on the vehicles bumper, the
coaxial cable from the antenna can be routed through a
drain hole in the trunk. When the antenna is roof mounted
pass the cable between the body and door. Leave a drip-
loop at the lowest point in the cable before entry into the
vehicle to prevent water from entering the car.
18
(3) Antenna Adjustment
Some mobile antennas are not designed at 50-ohm impe-
dance. In this case, impedance matching between the an-
tenna and the coaxial cable (50) is required. This can be
achieved by using an antenna matching device or coupler.
t Adjust length
One turn coil
Bumper Antenna
ground
Grid Dip meter
Disconnect
Coaxial cable
Fig. 5-9 Adjusting Antenna Resonance
The antenna to be used should first be checked with a dip
meter to insure that it is designed for your operating band,
then the impedance matching should be checked with an
SWR meter. (See Fig. 5-9)
The VSWR should preferably be less than 1.5:1 for satis-
factory operation. For antenna adjustment refer to the an-
tenna instruction manual.
5.8.4. NOISE REDUCTION
In motor vehicles, noise is generated by the ignition sys-
tem. Other sources of noise include the wiper and heater
motors.
Although the TS-430S is equipped with a noise blanker to
minimize ignition noise, it is imperative that some preven-
tive measures be taken to reduce the noise to the lowest
possible level.
(1) Antenna location Selection
Since ignition noise is generated by the vehicles engine,
the antenna must be installed as far from the engine as
possible.
(2) Antenna Matching
In general, mobile antennas have a lower impedance than
the 50-ohm coaxial cable used to feed them, resulting in a
mismatch between the antenna and the coax. Such trou-
ble can be eliminated by using an antenna tuner between
the TS-430S and the coaxial cable.

O. Matching Circuit Examples
OUTPUT
INPUT OUTPUT —\npyt!}
u
Fig. 5-10 Matching Circuits
(3) Bonding
The component parts of motor vehicles, such as the en-
gine, transmission, muffler system, accelerator, etc., are
coupled to one another at DC and low frequencies, but are
isolated at high frequencies. By connecting these parts
using heavy, braided ground straps, ignition noise can be
reduced. This connection is called “bonding”.
(4) Use ignition Suppressor Cable or Suppressor Spark
Plugs
Noise can be reduced by using spark plugs with internal
resistors, or resistive suppressor ignition cable.
(5) Battery Power Connection
It is recommended that battery power be suppllied directly
to the TS-430S from the battery terminals.
CAUTION
Disconnect the TS-430S before jump-starting or before
charging the battery.
(6) Battery Capacity
The power system of a motor vehicle is comprised of a
battery and an alternator (which generates power while
the engine is running) to supply current to loads or to
charge the battery.
Since the transceiver draws high current during transmit,
care should be excersised so the power system is not
overloaded. When using the transceiver, the following
points should be observed from the viewpoint of battery
maintenance:
1. Turn the transceiver OFF when the lights, heater, wip-
ers and other high-draw accessories are used.
2. Avoid transceiver operation when the engine is not run-
ning.
3. If necessary, use an ammeter and/or a voltmeter to
check battery condition.
5.9 FIXED STATION OPERATION
5.9.1. Power
The TS-430S requires more than 18A at 13.8 VDC when
transmitting at full power. Use the model PS-430 power
supply for fixed stations.
5.9.2 ANTENNAS
Fig. 5-11 Rotary Beam Antenna
For HF fixed-station operation, an antenna specifically de-
signed for amateur operation is recommended. Antenna
types include wire antennas, verticals, rotary beams, and
other antenna types. HF antennas are quite large and
must be installed to withstand strong wind, heavy rain,
etc.
Any antenna used with the TS-430S should be of 50-ohm
impedance and should be connected using an appropriate
coaxial cable such as RG-8/U.
Impedance matching is important. Impedance mismatch-
ing will result in a high VSWR and power loss, or can
cause unwanted harmonic radiation and interference (TVI,
BCI).
The impedance match can be checked with an SWR
meter. Generally, satisfactory operation is assured when
the VSWR (Voltage Standing Wave Ratio) is less than
1.5: 1.
A rotary beam antenna is very effective for DX operation in
the 14, 21 and 28 MHz bands. (Fig. 5-11)
NOTE:
Protect your equipment — use a lightning arrestor.
19

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6.1 GENERAL INFORMATION
Your TS-430S has been factory aligned and tested to spe-
cification before shipment. Under normal circumstances,
the transceiver will operate in accordance with these oper-
ating instructions.
lf your transceiver fails to work, contact the authorized
dealer from whom you purchased it for quick, reliable re-
pair. All adjustable trimmers and coils in your transceiver
were preset at the factory and should only be readjusted
by a qualified technician with proper thest equipment.
Attempting service or alignment without factory authori-
zation can void the transceiver's warranty.
6.2 INSTALLING THE OPTIONAL
FILTERS
1. Remove the power connector from the radio.
2. Using a #2 philips screwdriver, remove the top cover
(8 screws). Be careful of the VOX controls, and the
speaker lead, which may be unplugged.
3. Loosen the two side screws and remove the 2 screws
securing the IF unit bracket. Swing the bracket up
slightly to access and remove the two heat sink
screws. Swing the assembly down.
4. Remove 7 screws from the IF unit. Switch the board
forward. Protect the top of the front panel from
scratching.
5. Using a 45W (or less) soldering pencil, clear the 6
holes for the filter, if they are filled with solder. When
installing an AM filter, first remove R16 on the IF unit,
and cut the R-129 lead on the Control unit.
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Fig. 6-1 AM filter detail No. 1
20
SECTION 6. ADDITIONAL INFORMATION
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. There is no polarity to the filter. Install the filter into
its position on the IF unit. Solder the 2 mounting tabs,
and the 4 input and output pins to the circuit board.
Solder sparingly, and heat the connections only long
enough to insure a good solder joint. Don’t overheat
the filter or circuit board.
. Carefully inspect your soldering. Be certain that all
pins are actually soldered, and that you have not sol-
dered across any spots on the board or between any
of the pins on the filter. Clip the pins flush to the
board.
. Replace the IF unit in its place. Make certain no wires
will be pinched underneath the board. Replace the 7
screws for the board, plus the two heat sink screws.
Tighten the 2 side screws and replace the 2 rear
bracket screws, (See that the wire harness does not
interfere with the PG scan speed control).
. Move the connection as illustrated when an AM filter
is installed.
Reconnect the speaker lead, and reinstall the top
cover.
Apply power and verify your work. Filter installation is
now complete.
Fig. 6-2 Top cover removal
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Fig. 6-3 AM filter Detail No. 2