[sdiy] Matching CA3080s (was Re: OTA performance (was SSM chip reissue))

[Roman Sowa]

Yes, OB-X seems to have matched or at least selected CA3080 in the 
filter, they are marked with color dot. There are 3 CA3080 on each voice 
card with the same color dot. Can't remember which one is the 3rd, 
probably Q control.
Unlike glide CA3080s that didn't have any dot IIRC. And those ones were 
really far off from each other.

Roman

W dniu 2017-04-26 o 13:29, Tom Wiltshire pisze:
>
> So at least as far as Elektor were concerned, matching OTAs was only
> worthwhile for the 24dB filter. The 12dB SVF would apparently work
> with any old thing, since they often must have been building them
> with the OTAs with the most *dissimilar* Gm's.
>
> Do we have any hard evidence that Oberheim matched OTAs for use in
> their SVF? Or maybe they did for the early SEMs but not later for the
> OB-X?
>
> Just curious, don't care much one way or the other...
>
> Tom
>
>
>
>
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