[sdiy] MS20 VCF clone troubles

[Frederic Bourgeais]

Hello rené,

> Nooo! Don't do that, or you will instantly fry the 3080!
> 
> Hmmm.... But there is your problem. The amplifier bias pin would go to
> the 10k resistor that comes from the current sources PNP transistor.

Ok, I soldier transistor's resistors to the output of 3080 (pin 6), but
looking at your schematics, The double circle on 3080 symbol mean Amp bias
input (pin 5), is it true ?

> "Pitch" would be the main frequency control voltage, either from a
> keyboard, Midi2CV or Sequencer (or whatever). The other CVs can be
> scaled and thus are not necessarily at the 1V/oct setting.

I'm Ok

thanks :)