[sdiy] single transistor VCA (was OTA VCA)

Mattias Rickardsson mr at analogue.org
Thu Mar 23 16:18:32 CET 2017


On 23 March 2017 at 16:14, Elain Klopke <functionofform at gmail.com> wrote:
> Ah, yes, it does appear to be backwards. That didn't help in my case, sadly.
> Also, the one in the link you posted appears to be a PNP as opposed to the
> NPN that I'm using.

No, it's an NPN.
2SC945.

> Does that make a difference?

It would, yes. :-)

> As for the op amp buffer, I physically do not own any op amps at the moment.

What I mean is... how do you connect and measure things?

/mr



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