Power supply appears to be the problem. It is an Icom PS-125 that was a "gimmee" when I got my previous rig, an IC-746PRO. The problem kept repeating even after I reseated the power pole connectors in the K3 rear apron. I then substituted a switching supply I have for my Kenwood TS-480HX and had the radio transmitting a CQ loop into a dummy load for about two hours and it just kept going and going and ...
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