VCA ICs ~ WAS: [sdiy] cloning a PPG EVU / Wave?

[Andre Majorel]

On 2007-08-12 19:39 +1000, Paul Perry wrote:

> >Given how good the Korg MS- and PS- sound, their single-transistor
> >VCA can't be all bad.
>
> I'm an MS20 fan - it's one of the couple of synths I kept when I
> went broke - but in all honesty, the VCA is noisy as hell. Plus,
> you have to select the transistor. 
> In chess terms, I'd rate the MS20 VCA as !? - "brilliant, but
> unsound".

Yes, it's noisy and there's quite a bit of CV bleed, although that
might come from the VCF. When I modularise my MS-20, I'll try
patching the VCF output into a cleaner VCA to see where the
goodness comes from.

Any idea on which parameter the transistor (2SC945(L)K) is selected ?

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
Do not use this account for regular correspondence.
See the URL above for contact information.