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RE: Inspecting a Fender Princeton Reverb guitar amplifier
I have a bassman 10 (I think I mentioned it to you before) that when you plug into the 'studio' side and turn the treble pot, there is a relitively quiet (but still pretty audible) oscillation that happens and changes frequency as you turn the pot. I need to figure out what is going on with it.
Well, that is an interesting problem! There may be a broken lead on one of the parts in that section of the circuitry, or possibly a capacitor way out of spec.
Yeah, it is all original. The I was going to replace all of the caps anyways and if that doesn't do it, maybe I will discover the problem in the process.