Hi Stefan,
I've built the Singer and I'm loving the crazyness it's able to produce. The only slight issue I'm having is that the dry/wet balance is not at the middle position but rather at 2:30. Thus the pure dry sound when at max CCW position is significantly louder than the wet sound at the max CW position. I though I could adjust the levels with the offset trimmers but they seem to change nothing.
Are those trimmers able to solve the issue? If not - what are they for? Any idea, why (even after reflowing the trimmers) they have no impact on anything. Maybe you could send me the schematic?
Best regards
Andreas
Hi Andreas, The dry/wet knob wasn’t designed to provide an equal mix at noon but rather to allow for a gradual and smooth introduction of the wet signal without requiring a logarithmic potentiometer.
However, if you'd like to tweak this, you can experiment with R96 (15k, wet) and R85 (12k, dry) by soldering resistors of equal value for both (Note that I have not tested this and cannot recall from my records that this works).
The trimmers help minimize CV leakage from the CV inputs into the audio signal. Since its impact is minimal and not relevant in most situations, and because the calibration process is somewhat tedious, I opted for a fixed template with preset trimmer settings. Best, Stefan