Thanks Josue, I imagine it could be possible externally. I was looking at the
schematic when I frst posted the question. Just wanted some "real life" report about how it
worked. I does not seem so evident as with other filter designs...
Charlie, your mod looks cool and minimal, thank you. May be one could implement just a
switch and two sockets to your resistors to switch between "normal" and external
(ext. VCA) resonance control...
That would be a minimum modification / maximum satisfaction =:)
Anyhow, am I wrong or the pot legs are swaped in your drawing? One should send the
wiper to the VCA as I understand from CGS35 schematic...
Fernando
schematic when I frst posted the question. Just wanted some "real life" report about how it
worked. I does not seem so evident as with other filter designs...
Charlie, your mod looks cool and minimal, thank you. May be one could implement just a
switch and two sockets to your resistors to switch between "normal" and external
(ext. VCA) resonance control...
That would be a minimum modification / maximum satisfaction =:)
Anyhow, am I wrong or the pot legs are swaped in your drawing? One should send the
wiper to the VCA as I understand from CGS35 schematic...
Fernando
> Yes You can do VC resonance this way. Just remember to invert the
> signal, using an inverting VCA (-input) or using a spare inverter. This
> is the way for VC Res from the 70`s....