PangeaDestructor
Active member
Such a simple build, I even got my Ge transistors as a selected pair (from Barry at guitarpcb). They are PNP, the pinout is correct, charge pump is from Tayda, everything looks right to me, the vrefs are correct. However, the bias trimpot does nothing (changes q2's range by about -/+ 0.2v), the output is low and gated - no sustain at all - with an audio probe I get a pretty substantial volume drop at the tail end of each component (e.g., signal is full volume entering c1 and barely audible leaving the capacitor, same with r4). Pics attached, including the charge pump voltage, any help appreciated!
