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So I was messing around with different transistors and bias values in a previous fuzz circuit I built, and found a pretty fun place with oscillation those rad sub octave glitch sounds some oscillating fuzz's do. I drew up a PCB, ordered them, and they don't oscillate at all

My best guess is that I'm getting some kind of capacitive coupling through rows on the breadboard or something? Does anyone have any clues where I could start figuring out what went wrong? Also just in case the circuit is below!

Did you add power filtering at all to the boards? That usually kills oscillation first.

I might try and make a stripboard layout of it and see if it oscillates... the spacing should be just a hair wider than the breadboard so if it does/doesn't you could confirm your capacitive coupling theory possibly..

Yup that was it! I've been just putting the same power filtering circuit into every build and totally didn't even think about it here. Just butchered out the capacitor and we're golden! Thanks duder!

cherler wrote:Yup that was it! I've been just putting the same power filtering circuit into every build and totally didn't even think about it here. Just butchered out the capacitor and we're golden! Thanks duder!