[sdiy] VCA distortion - bad

[Tim Stinchcombe]

> cannot seem to correct it by changing Rf. In Hutchins' design 
> he has the 
> negative pin of the 3080 (pin 4) going to the CV buffer amp 
> (I think that's 
> correct) output. then there is a diode from the buffer output to it's 
> inverting input and another diode from that point to pin 5 on 
> the 3080. is 
> there a way to limit the current through these diodes?

Don't have Electronotes, but in the Jung set-up (1st edn IC Op Amp
Cookbook), the bias current to the 3080 is simply limited by the resistor on
the input of the CV buffer. He shows a 20k resistor, thus giving a max Iabc
of 0.5mA for a max CV of 10V. What value are you using here?

Tim
__________________________________________________________
Tim Stinchcombe 

Cheltenham, Glos, UK
email: tim102 at tstinchcombe.freeserve.co.uk