Has anyone attempted to troubleshoot this issue recently? This evening I placed a grounded piece of PC board on top of the LM380 and also tried 0.001uF caps between pins 14 & 3 and 7 & 8, to no avail.
I may just bypass the LM380 audio amp and place an outboard 386 audio amp board in to drive the speaker¡.
73
Goody
K3NG