Jonathan,
If it was working before, it may be that the wattmeter bridge diodes in
the KAT100 were zapped with a lightning surge.
I suggest the first step is to obtain 2 1N5711 diodes and replace D1 and
D2. While you are doing that, check the soldering/tinning on the leads
of T1. If that does not restore normal operation, other tests may be done.
BUT - if it has NOT worked properly before, you may have other problems.
In that case, check T1 very carefully to be certain the correct leads
are in the proper holes and the leads are well tinned and soldered.
In the future, for your personal safety and the health of your
equipment, disconnect antennas when not in use.
73,
Don W3FPR
Jonathan Taylor, K1RFD wrote:
After working OK for several years, my KAT100 no longer indicates SWR, nor
does it tune properly.
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