I posted this to the SDIY list. Shoulda tried here first:
I have two Synthacon VCFs built on CGS boards. The third one is on the
way but before that I need to solve I problem I'm having. Turning the
Resonance pot produces a scratchy noise. I think this is a common
problem others have had, too. I'm under the impression that this is DC
through the pot. I've tried wiring a cap in a variety of ways with no
luck.
Has anyone built this VCF and DO NOT get scratchiness when turning the
res pot? To test, turn the inputs down (off) , turn the gain all the
way up, and turn the res pot back and forth a bunch of times.
I have tried swapping pots (all Alphas, though).
I have two completed modules and one on the board so any suggestions
or ideas will be carried out immediately.
Thanks in advance,
peng
I have two Synthacon VCFs built on CGS boards. The third one is on the
way but before that I need to solve I problem I'm having. Turning the
Resonance pot produces a scratchy noise. I think this is a common
problem others have had, too. I'm under the impression that this is DC
through the pot. I've tried wiring a cap in a variety of ways with no
luck.
Has anyone built this VCF and DO NOT get scratchiness when turning the
res pot? To test, turn the inputs down (off) , turn the gain all the
way up, and turn the res pot back and forth a bunch of times.
I have tried swapping pots (all Alphas, though).
I have two completed modules and one on the board so any suggestions
or ideas will be carried out immediately.
Thanks in advance,
peng