Importance of the cap value in RC circuit

#1

hello all!

I am trying to comprehend the circuitry of the the CoolAudio quad VCA used in Veils and Frames and specifically the use of a pulldown RC circuitry on the inputs. How important is the capacitor value in that duo? Is this circuit used to load the input impedance when not in use?

Thanks in advance!

Stan

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#2

There’s a lot of mythology about this on the sdiy mailing list. Try searching their archives.

It’s a stability network that prevents the 2164 circuit from oscillating. It’s not a pulldown.

Blindly trust the datasheet :slight_smile:

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#3

Got it, thanks a lot!

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