[Elecraft] KPA500 dead?

[Jack Brindle]

Steve;

It is 4:40 on a Friday. If you haven’t done so already, call Customer Support NOW!

This is not good. My suspicion is circuitry on the PA sandwich, possibly the input
network.

- Jack, W6FB
Elecraft Engineering


> On Jul 28, 2017, at 3:25 PM, Steve Lund <k6um.elist at gmail.com> wrote:
> 
> It appears that my KPA500 has failed. It has a permanent "PA DISS" on all
> bands. Just before that fault it smelt like wire insulation was burning (no
> smoke). It has this condition on 160 - 6m. The fans seem to be running fine
> and the PA temp was 50C. I've run the KPA500 on JT65/MSK144/FT8 for over a
> month on 6m without a problem.
> 
> I was using the amp on 6m with 400w out (about all I can get on that band
> with 110vac). I had just finished a QSO on FT8. I can only get about 50w
> out before the "PA DISS" occurs.
> 
> I've opened the top cover and see no obvious damage. Are there any other
> checks before sending it back to Elecraft?
> 
> Thanks,
> Steve, K6UM
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