Pots with even a slightly dusty surface will cause scratchy sounds when
there is DC running through them, as apparently there is. Takada's variant
has a slightly different resonance circuit, with a 68uF in series with the
pot, and a fixed resistor across both to deal with the DC gain requirements.
Perhaps insert a 100uF cap between the existing 1k/1k pot pair (+ve towards
the pnp), then add a 2k2 resistor in parallel with the lot. Maybe try a
smaller electro too.
Ken
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
there is DC running through them, as apparently there is. Takada's variant
has a slightly different resonance circuit, with a 68uF in series with the
pot, and a fixed resistor across both to deal with the DC gain requirements.
Perhaps insert a 100uF cap between the existing 1k/1k pot pair (+ve towards
the pnp), then add a 2k2 resistor in parallel with the lot. Maybe try a
smaller electro too.
Ken
>it happens on charles's synthacon as well, and AFAWCS, it's not a pot issue._______________________________________________________________________
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>> Hey that happens on my Synthacon too! Kinda strange. I have been planning
>>on changing that pot for a while now.
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>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
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Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>