[Elecraft] KPA1500 problem

[Roy Koeppe]

" 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