Hertzilla
Newbie level 4
The factory added input level pots to each channel of this stereo amp (a custom mod for the purchaser) when it was built years ago. Now one of the channels is oscillating. The oscillation affects the audio range and will vary somewhat in frequency and amplitude depending on the setting of the pot.
I swapped pots between channels and all was well... for awhile... then the same channel began oscillating again. The oscillation can be stopped by bypassing the pot. The NP electrolytic on the input has been replaced and the other components in that channel have been checked, so I see no obvious problem with the amp itself.
Any suggestions on curing the oscillation without removing the pot?
I swapped pots between channels and all was well... for awhile... then the same channel began oscillating again. The oscillation can be stopped by bypassing the pot. The NP electrolytic on the input has been replaced and the other components in that channel have been checked, so I see no obvious problem with the amp itself.
Any suggestions on curing the oscillation without removing the pot?