u/Feeling-Income5555

I just bought a generic pedal from Goodwill. I have no idea what circuit it is. Also, when I plug it in, it gives me some decent distortion, but the sound fades for about two minutes and then it slowly comes back up. I have basic electronics skills when it comes to soldering and building however, troubleshooting is a little beyond my experience at this point.

My first question is, does anybody have an idea of what circuit this is?

Second, would anybody have an idea of what might be causing the sound to fade down and then come back up?