K3 audio problem

[Elecraft mailing list]

This weekend I suddenly began to have an oscillation problem in the speaker amp of my K3 (SN 969)) Headphones and the RX both work fine. I don’t hear the strange audio oscillation in the headphones), but the speaker amp appears to be having problems. If I turn on the speaker using SPKR+PH YES I don’t hear the RX audio in it (although the headphones continue to work.

Any clues how to proceed?

Thanks!

Tom, W4KX
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