It sounds like your PSU isn't up to the job. Try adding 100uF across each of
the power rails to earth.
Ken
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>
the power rails to earth.
Ken
>Hi,_______________________________________________________________________
>
>I built two cgs65 from the rev. 1.1 pcb and with one vco
>they function fine. But as soon as i connect a second vco
>to the powersupply, the vca starts oscillating on it's own.
>The audio of the vco is not even connected a that point
>and the vca audio is not routed to the vca input.
>Perhaps this has something to do with inadequate grounding?
>Any suggestion how i could tackle this?
>
>kind regards
>
>
>
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>
>Yahoo! Groups Links
>
>
>
>
Ken Stone sasami@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>