[Elecraft] KPA-500 No Power out on 80 meters

[Tom KG3V]

I believe I have fried the 80 meter circuitry in my KPA-500. I am 
contacting Elecraft about possible repairs, but would also be interested 
in other's input. Here is what happened:

I was using a multi-band antenna and the SWR was high on 80m. I use a 
KAT-500 with the Amp at all times. My (naive) thinking was that if the 
KAT-500 could successfully tune it, the Amp was safe. In the past, this 
seemed to have been the case. I use an IC-7600 and have the KEY line 
connected, as well as the PA KEY line between the Tuner and the Amp. 
Every time I changed frequencies on the 80 meter Band, I would TUNE 
before operating. At one point, I noticed "that smell" of hot 
components, and was then unable to transmit on 80 meters.

In testing this morning, I get no output from the Amp on 80 meters only. 
All other Bands seem to be fine. I can use 80 meters with the Amp in 
Bypass mode, so I do not suspect a problem with the Tuner. Today, it 
continues to work fine on several other bands with full power output.

Thanks for any suggestions


73,

Tom, KG3V

-- 
Get on the Air and make some noise
Ham Blog at WWW.KG3V.COM


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