Kenwood TS-430S - Manual (Page 22)

6.4 HOW THE TX FINAL TRANSISTORS
ARE PROTECTED
Final transistor protection is provided by sampling the re­
flected power. As the reflected power is increased (higher
SWR) transmitter drive is reduced, thus decreasing input
to the final transistors. This in turn reduces collector loss,
protecting the final transistors.
6.5 OPTIONAL 10Hz DISPLAY
RESOLUTION
If you would like 10Hz instead of the supplied 100 Hz dis­
play resolution, cut the jumper as shown on the Control
unit.
6.6 PHONE PATCH OPERATION
In an area where phone patch is legal,the PC-1 A Phone
Patch may be used with the TS-430S. Recommended set­
ting are:
PC-1A RXGain 4 TS-430S VOX Gain 1
TX Gain 4 AF Gain 4
Null as necessary Mic Gain 5
ANTI VOX Max
Most other phone patches will work satisfactorily without
any modification to the radio, requiring only an external
speaker connection, and that the Mic line be run through
the patch.
For those operators who desire a Patch input similar to the
TS-930S, TS-520SE or TS-820S, an input connection and
terminal must be added at the Mic input preamp circuit.
Use a 100-Ki2 resistor in series, with a 10-ki2 to ground
on the input side of the 100-ki2 resistor. Use shielded line,
and connect as follows:
On the IF unit X48-1 370-00 install the fixed divider at the
junction of R161 10k, C94 lOOpf, and C93 1/^F (input of
Q34). Add an RCA jack at the empty rear panel opening or
use remote pins 7 and Gnd for input.
2 2
6.7 OPERATION WITH A LINEAR
AMPLIFIER
Operation with a linear amplifier.
TS—430S internal wiring.
Pin 6 ALC input
Connector Metal Shell is Ground
Pin 2, Relay Common
Pin 4, Relay N.O.
Use shielded line for both ALC and RL (control line).
Initial linear amplifier tune-up should be perfomed with the
exciter at 50% power, to reduce wear-and-tear on both the
linear, and the exciter. Use of a dummy load is strongly
suggested, since the bands are already sufficiently crowd.
The TS-430S may be operated with any conventional lin­
ear amplifier which will accept up to approximately 100
watts RF drive, has a low currrent DC operated keying cir­
cuit, and returns approximately -8---------------- 10 V DC ALC (ad­
justable) back to the exciter.
TS-430 Internal Wiring
View from code
K ^
REMOTE connector
Fig. 6-7 REMOTE connector
PIN FUNCTION PIN FUNCTION
1 Speaker output 5 Relay N.C
2 Relay common 6 ALC input
ALC threshould level
approx. -6V
3 PTT line 7 Not used
4 Relay N.O