Kenwood TS-430S User Manual

KENWOOD

INSTRUCTION MANUAL

Accessaries

Warranty card*.................................................................... 1 Instruction Manual (B50-4006-30)...................................... 1 Fuse (20A) (F05-2034-05).................................................. 1 Calibration cable (E31 -21 54-05)....................................... 1 DC power cable (E30-1638-05).......................................... 1 7 pin DIN plug {E07-0751-05)............................................. 1 8 pin DIN plug (E07-0851-05)............................................. 1

* Included only for U.S.A.

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 remote operation, maintenance, or service.

• The following explicit definitions apply in this manual:

Note: If disregarded, inconvenience only.

No risk of equipment damage or personal injury.

Caution: Equipment damage may occur, but not personal injury.

	CONTENTS
SECTION 1. SPECIFICATIONS......................................................................................................................................................		3
SECTION	2. FEATURES................................................................................................................................................................	4
SECTION	3. PREPARATION FOR USE.........................................................................................................................................	4
SECTION	4. CONTROLS, INDICATORS AND CONNECTORS
4.1	FRONT AND TOP PANELS..................................................................................................................................	6
4.2	REAR PANEL........................................................................................................................................................	8
SECTION 5. OPERATION
5.1	RECEPTION.........................................................................................................................................................	9
5.2	TRANSMISSION..................................................................................................................................................	11
5.3	VOX OPERATION.................................................................................................................................................	13
5.4	SEMI-BREAK-IN OPERATION.............................................................................................................................	13
5.5	OPERATION WITH A LINEAR AMPLIFIER.........................................................................................................	13
5.6	CW OPERATION..................................................................................................................................................	13
5.7	KEY BOARD FUNCTIONS...................................................................................................................................	14
5.8	MOBILE OPERATION..........................................................................................................................................	17
5.9	FIXED STATION OPERATION............................................................................................................................	19
SECTION 6. ADDITIONAL INFORMATION..................................................................................................................................		20
SECTION 7. TROUBLE SHOOTING.............................................................................................................................................		24
SECTIONS. OPTIONAL ACCESSORIES......................................................................................................................................		25
SECTIONS. INTERNAL VIEWS.....................................................................................................................................................		27
SECTION 10. RADIO FREQUENCY ALLOCATION.....................................................................................................................		29
SECTION 11. BLOCK DIAGRAM..................................................................................................................................................		29
SECTION 12. SCHEMATIC DIAGRAMS...........................................................................................................................		30 ~ 34

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.

I				SECTION 1. SPECIFICATIONS
[GENERAL]
Transmitter Frequency Range;						160, 80,40, 30, 20,17*, 15,12', 10 meter Amateur bands
Receiver Frequency Range:						150 kHz to 30 MHz
Mode:						A3J (LSB, USB), A1 (CW), A3 (AM), F3 (FM)
Antenna Impedance:						A3J (LSB, USB), A1 (CW), A3 (AM), F3 (FM........................ OPTION)
Power Requirement:						12.0 to 16.0 V DC (13.8 V nominal)
Power Consumption:						20A approx, in transmit mode
						1.2A approx, in receive mode
Dimensions:						270 (10.6)W X 96 (3.8)H x 257 (10.1) D mm (inch)
Weight:						6.5 kg (14.3 lbs.)
[TRANSMITTER]
Final Power Input:
	—	M	o	d	e	SSB		CW	FM	AM
	Band ~~——
		1 60m - 1 5m band				250WPEP		200WDC	—	60W
			10m band			250WPEP		200WDC	120W	60W

Modulation:

Carrier Supression:

Unwanted Sideband Suppression;

Harmonic Content;

Maximum Frequency Diviation (FM):

Microphone Impedance:

[RECEIVER]

Circuitry:

Intermediate Frequency:

Sensitivity:

SSB = Balanced Modulation

FM = 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) 500i2 to 50 ki2

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)

Frequency	150kHz-500kHz	500kHz- 1.8MHz
Mode			1.8MHz-30MHz
SSB/CW(10dBS/N)	Less than 1 //V	Less than 4 yuV	Less than 0.25 AV
AM(10dBS/N)	Less than 13 //V	Less than 40 //V	Less than 2.5 fN
FM (30dBS/N)	-	-	*Less than 1 //V
FM(12dBSINAD)	-	-	*Less than 0.7 //V

Image Ratio:

IF Rejection:

Selectivity;

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)

	Selectivity	-6dB	-60 dB
	Mode ~--------------------------------- ...^^
	SSB/CW	2.4 kHz	4.4 kHz
	AM *1	6 kHz	12 kHz
	FM *2	15 kHz	32 kHz

Frequency Stability:

Frequency Accuracy:

RIT Variable Range:

Audio Output Impedance:

Audio Output Power:

1 with YK-88A optional filter

2 with FM-430 optional accessory

Better than ± 30 x 10“® (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 10x10~® More than ± 1 kHz 4i2 to 16Q

More than 1.5W across 8Q (at 10% distortion)

Note: Circuit and ratings subject to change without notice due to developments in technology.

SECTION 2. FEATURES

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.

•An A = 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.

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 1 20W 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, 1C 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 microphone (50013 to 50 Icfi) can be used. The P.T.T. switch should be isolated from the mic circuit (shown in 0)- Use a mi­ crophone with a separate switch and MIC line so both P.T.T. and VOX are available.

-ra-

Headphones

Use headphones of 4 to 160 impedance. The optional HS-5 or HS-6 headpor>e are best suited for use with the TS-430S

Stereo-type headphor>es can also be used.

HC3|f	View from cord side
	+8V (INPUT)	— ® UP
	(D
	(INPUT) ^	® DOWN
	NCd)	® STBY
	GND(MIC)®	® MIC
		---- ® GNDlSTBYl

REMOTE conitector

External accessories can be con­ nected to the TS-430S through

Key the REMOTE conr>ector. The PTT

For CW operation, connect terminal can be used for remote your key to the KEY jack at control of transmit/receive opera­

the rear. Use shielded cable.tion.

ACCESSORY connector

Accepts automatic antenna tuner AT-250.

GNO terminal

It is recommended that a ground lead be connected to the GNO terminal at the rear of the set to prevent the possibility of electric shock, TVI and BCI. Use as short and heavy a lead as possible.

Fig. 3-1 Fixed Station Connection

External speaker Besides the built-in speaker, an external speaker can also be used. Connect to the rear EXT SP jack us­ ing the supplied plug.

{ SECTION 4. CONTROLS, INDICATORS AND CONNECTORS |

QO ®

®

4.1FRONT AND TOP PANELS (TS-430S shown)

O 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).

O 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 1C	or
ALC level, depending on METER switch position.

0 VFO indicators

VFO A indicator lights when VFO A is operating. VFO B indicator lights when VFO B is operating.

O Digital display

The digital display indicates true operating frequency in all modes to an accuracy of 100 Hz.

0 M.CH (Memory Channel) display
Indicates memory channel 1 - 8 or P, program scan.
0 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:VFO A 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.

O 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.

0 NOTCH control

Turn the NOTCH switch ® ON to activate the notch filter.

Adjust the notch frequency to		null beat	(carrier interfer­
ence) signals.
0 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.

0 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):	Indicates	the	RIT
switch ® is ON.
NOTCH: Indicates the notch filter is	operating	and	lights
when the NOTCH switch © is ON.

0 STAND-BY switch This switch selects:

REC: The transceiver is receiving unless the microphone PTT switch or the VOX circuit is activated.

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.

1C - The meter monitors final stage collector current.

1 2 - 1 9A is normal, 1 7A 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.

0 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.

<D 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 lowpower 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 0 .
•	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.

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

kFIz

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.

0 AF GAIN (Audio Frequency) control

This control adjusts the receiver audio output level, Volume increases as the control is turned clockwise.

0 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

"0" 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 "0" position (at the detent).

0 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.

0 PG.SCAN (Program scan) control

This adjusts program scan speed.

o 0 o

4.2 REAR PANEL

O 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.

0 X. VERTER (transverter) terminal

This 8 Pin DIN connector is used to interface a VHF or UHF transverter.

See page 23 for pin-outs.

0 GND (Ground) terminal
To prevent electric shock, as well as		RFI and	BCI,	connect
the transceiver to a good earth ground.
O EXT. SP (External speaker) jack
The receiver audio output can	be	connected	through this
jack to an external 4 to 1 6	ohm	speaker.	The	internal

speaker is disconnected when an external speaker is con­ nected.

0 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.
0 REMOTE connector
This connector is used to interconnect	a linear	amplifier or
other accessory item.

0 ACC (Accessory) connector

This connector is used to access the automatic antenna tuner AT-250. Refer to page 22.

0 DC POWER connector

This is used to connect the DC power supply.

SECTION 5. OPERATION

Note: ® denotes transmit mode; (g) denotes receive mode.

WIDE	Centered
®J.'ALG<

REC

Fully counter clockwise

®

RF; Fully clockwise

AF: Fully counter clockwise

® Connect mie	OFF
OFF Both CAR and MIC '^Select the mode	® Select band
fully counterclockwise
MAN
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

Signals below this level are attenuated

AF GAIN -gb- RF GAIN

6

S-meter reading at partial counter­ clockwise position of RF GAIN control

AF GAIN

RF GAIN

6

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.

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)CWMode

By using the IF SHIFT in conjunction with the RIT, tone quality can be adjusted.

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	will
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.

*ln 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.
*ln transmit bandwidth is automatically WIDE.
	PASSBAND WIDTH (-6 dB) kHz
MODE			CW		SSB		AM
		WIDE	NARROW	WIDE		NARROW	WIDE
							NAR
No optional filter		2.4	•	2.4		*	2.4
YK-88C or CN		2.4	500	-		-	-
			or 270
YK-88SN		-	-	2.4		1.8	-
YK-88A		-	-	-		-	6

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.

10

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

5.2.3PROC (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 - 33ki3 resistor (de­

pending on	the microphone used) across the microphone
input. (Mic	control setting should be approximately 12 o'­
clock)

W B	O
	o Power meter
	Dummy load

Fig. 5-4 Testing with Dummy Load or

Power Meter

5.2.1SSB 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.

5.2.2AM Operation

1.	Set	the MODE		switch to AM and the meter switch		to
	1C.
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.

10k — 33 kil (depending on micropone used.)

O-----	^N^--------	•---------	O
from microphone			to the MIC connecter
O---------			-O
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.

5.2.4CW 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 i3to 50 kO\. When using a low impedance microphone (500 Q the MIC GAIN control should be ad­ vanced slightly higher than when a high impedance micro­ phone is used, while observing the ALC meter.

• 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.

/

3 5 79+20-1-40+60

Fig. 5-5 ALC Adjustment

5.3VOX 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.

1 2