Check back post from about a month ago, seems everyone has this problem. Not due to bad pots but DC getting into the pot. I've tried a couple of fixes posted on the board and nothing has worked.
----- Original Message -----
From: peng3002
To: cgs_synth@yahoogroups.com
Sent: Thursday, December 21, 2006 4:51 PM
Subject: [cgs_synth] Scratchy Synthacon Res pot question and poll
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
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