Kenwood TS-430S User Manual

KENWOOD

INSTRUCTION MANUAL

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: Accessaries

• Shipping container: Warranty card*.................................................................... 1

Save the boxes and packing in the event Instruction Manual (B50-4006-30) your unit needs to be transported for re- Fuse (20A) (F05-2034-05)

mote operation, maintenance, or service. Calibration cable (E31 -21 54-05)....................................... 1

• The following explicit definitions apply in DC power cable (E30-1638-05).......................................... 1

this manual: 7 pin DIN plug {E07-0751-05)

Note: If disregarded, inconvenience 8 pin DIN plug (E07-0851-05)

only. * Included only for U.S.A. No risk of equipment damage or personal injury.

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

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1 1

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;

Receiver Frequency Range: Mode: Antenna Impedance: Power Requirement: Power Consumption:

Dimensions:

Weight:

[TRANSMITTER] Final Power Input:

—Mode

Band ~~——

1 60m - 1 5m band

10m band

Modulation:

Carrier Supression: Unwanted Sideband Suppression; Harmonic Content; Maximum Frequency Diviation (FM): Microphone Impedance:

[RECEIVER] Circuitry:

Intermediate Frequency:

Sensitivity:

Frequency

150kHz-500kHz

Mode

SSB/CW(10dBS/N)

AM(10dBS/N) FM (30dBS/N) -

FM(12dBSINAD)

160, 80,40, 30, 20,17*, 15,12', 10 meter Amateur bands

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 lbs.)

SSB CW

250WPEP 250WPEP

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)

200WDC 200WDC

500kHz- 1.8MHz

Less than 1 //V

Less than 13 //V

Less than 4 yuV Less than 40 //V

........................

—

120W

1.8MHz-30MHz

Less than 0.25 aV

Less than 2.5 fN

*Less than 1 //V

*Less than 0.7 //V

OPTION)

60W 60W

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

Mode ~

--------------------------------SSB/CW

AM *1

FM *2

...^^

2.4 kHz 6 kHz

15 kHz

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“® (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.

-60 dB

4.4 kHz 12 kHz

32 kHz

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).

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.

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.

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 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-

View from cord side

HC3|f

(INPUT) ^

GND(MIC)®

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.

+8V (INPUT)

NCd)

— ® UP

----

® GNDlSTBYl

® DOWN

® STBY

® MIC

Key For CW operation, connect your key to the KEY jack at the rear. Use shielded cable.

Fig. 3-1 Fixed Station Connection

TS-430S

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.

REMOTE conitector External accessories can be con nected to the TS-430S through the REMOTE conr>ector. The PTT terminal can be used for remote control of transmit/receive opera tion.

ACCESSORY connector

Accepts automatic antenna tuner AT-250.

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 ® ®

4.1 FRONT 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.

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.

o 0 o

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,

lume 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.

Vo-

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.

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.

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.

REC

® Connect mie

WIDE

®J.'ALG<

OFF Both CAR and MIC '^Select the mode

fully counterclockwise ® Select band

MAN

Fig. 5-1 Initial Control Settings

Centered

Fully counter clockwise

® RF; Fully

clockwise

AF: Fully counter

clockwise

OFF

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

S-meter reading at partial counter clockwise position

of RF GAIN control

AF GAIN RF GAIN

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

No optional filter 2.4

YK-88C or CN 2.4

YK-88SN YK-88A

WIDE

- -

NARROW

500

or 270

SSB

WIDE

NARROW

•

2.4

1.8

WIDE

NAR

2.4

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

W B

Fig. 5-4 Testing with Dummy Load or

Power Meter

Power meter

Dummy load

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 - 33ki3 resistor (de

pending on the microphone used) across the microphone

input. (Mic control setting should be approximately 12 o'

clock)

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

-----

^N^

--------•---------

from microphone

---------

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.

to the MIC connecter

-O

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 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.

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.)

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 7 9 +20 -1-40 +60

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.

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