" My KPA1500 (s/n 121) has developed a problem:
When applying power (15-20W) from the K3 to the amp, it immediately faults
to:low gain fault ratio 3 (sometimes ratio 2 to ratio 6). The SWR indicator
shows high SWR as the amp faults. 100w only from exciter will cause ATU to
tune to 1:1 but when amp is switched on, it immediately faults as above.
Looked through archives and manual. No mention of this particular fault. Any
ideas would be appreciated."
I have had that exact same thing happen, and tracked it down to bad WW2
transmitting micas in my 160M Omega-match at the antenna feedpoint.
Something is likely breaking down, as someone else just commented. Luck &
73,
Roy K6XK
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