I am experiencing the same issue. Amp works fine however. Seems to be heat related.

    Michael- KD8TUT


On 10/20/2015 9:41 PM, Rick Tavan N6XI wrote:
Once my KPA500 warms up, it begins making sporadic clicking sounds. Usually
it sounds like a relay but sometimes it's quieter and might be metal
buckling as it contracts and expands. Any suggestions on tracking it down?

Thanks,

/Rick


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