TS930.4

TS-930 AMTOR KEYING MOD
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     FIRST MOD:

GO TO THE SIGNAL BOARD AND LOCATE C500. C500 IS A 4.7 UF ELECTROLYTIC
LOCATED NEAR THE CENTER OF THE BOARD (IF VIEWED WITH RADIO UPSIDE
DOWN WITH THE FRONT FACING YOU) NEAR CONNECTOR 30.
REMOVE THIS CAPACITOR BY TWISTING IT WITH A PAIR OF NEEDLE NOSE
PLIERS. THIS CAPACITOR CAN NOT BE REMOVED ANY OTHER WAY WITHOUT COMPLETE
DISASSEMBLY OF THE RADIO.
 ITS FUNCTION IS TO DEBOUNCE THE PTT SWITCH AND IS A BIG REASON WHY
THE 930 WILL NOT WORK SATISFACTORILY IN AMTOR MODE.

 THE NEXT MODIFICATION IS TO GROUND ONE LEG OF R476. THIS RESISTOR
IS LOCATED ON THE SAME BOARD JUST ABOVE THE LARGE CW FILTER. THE LEAD
OF R476 THAT IS EXPOSED IS THE SIDE OF THE RESISTOR THAT NEEDS TO
BE GROUNDED. AN EASY AND FOOL PROOF WAY TO DO THIS IS TO LOCATE R474
WHICH IS RIGHT NEXT TO R476 AND SCRAPE SOME OF THE INSULATION FROM
BOTH OF THE EXPOSED LEADS AND SOLDER A BRIDGE BETWEEN THEV. NOTE:
THE LEADS THAT ARE NOT EASY TO GET TO ARE NOT THE ONES TO WORRY ABOUT..
. THESE MODIFICATIONS ARE RECOMMENDED BY KENWOOD AND WILL PROVE TO
BE VERY SATISFACTORY...