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Just so the rest of the forum knows, I've refunded Tom for the defective pedal and he will send it back to me. When I diagnose it, I will post the results here.

Yeah but in tube amps they usually have 200+ volts running through them. I designed this circuit to take up to 18v. Using 1/4w resistors, that is like nothing to them. And yeah I measure them all for drift before they go on the board.

Yeah, I'm thinking most likely either the bias went out of whack or the transistor just cried uncle. I try my best to test them before they go out the door but Germanium is highly susceptible to temperature variations. The transistors I've been using for the Arcturus for the past 2 years all...

Let me just clarify a couple of things here. First, the entire enclosure is made of aluminium and when all signal and power cables are plugged into it, acts as a Faraday cage. So the length of the transistor wires matters very little. Second, I use multi-turn trimmers because they give me more...