Cgs synth

thanks richard for your comments. so it sounds like transistor matching and diode
matching are a must. perhaps i'll go ahead and build 2 as seperate units. i can always
mult a single cv control and apply equally to both when needed. i was thinking of doing 2
in one box for economy of space more than anything, since the pcbs are so narrow.
thanks,
-psm

--- In cgs_synth@yahoogroups.com, Richard Brewster <pugix@n...> wrote:
> One thing you'll need to consider is that the Synthacon VCF response is
> highly dependent on the transistors and diodes. I built two of these in
> a single panel and discovered that with identical parts the response and
> sound is still quite different. I did not match the diodes or
> transistors (a few notes on how to do this would be helpful - hint to
> the list). I treat these filters as different critters. When I do a
> stereo patch, the results are not matched. I don't really mind this too
> much. But if you are expecting parallel, matched response with a single
> set of controls, it is not likely to work well without a lot of
> tweaking. This VCF is not a precision instrument. And it's not
> expected to be.
>
> -Richard Brewtser
>
> ps_minor wrote:
>
> >hi all, i'm new to this list. i just dicovered ken's excellent diy site today after searching
> >around for kits/pcbs for building a simple stereo filter.
> >
> >i'm thinking of putting 2 synthacon pcb's in a box and using just one set of pots/cv
jacks
> >for controls. my objective is to process a stereo signal with one set of controls, cv and
> >everything. is there anything i should consider before proceeding with this? can i just
> >hook-up one set of pots/jacks to both boards, easy as that?
> >
> >thanks, -psm
> >
> >
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> >
> >See the following URLS for the CGS Modular Synth home page:
> >Main: http://www.cgs.synth.net/
> >Secondary: http://otherunicorn.0catch.com/synth/
> >Yahoo! Groups Links
> >
> >
> >
> >
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> >