The SSM2164 is e.g. used in the A-107. It is a quad VCA with exponential
control scale and is manufactured by Analog Devices. You can find a data
sheet on their website.

Best wishes
Dieter Doepfer

> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto: Doepfer_a100@yahoogroups.com ]Im Auftrag von Martin Rudling
> Gesendet: Donnerstag, 30. März 2006 21:06
> An: Doepfer_a100@yahoogroups.com
> Betreff: 1 technichals...
>
>
>
> Hi!
>
> I´ve asked Allen & Heath tech support what chips they used for the VF-!
> analogue valve stereo-filter. I didn´t get much wiser from the answer
> though.
> Maybe some one here knows about the chip SSM2164
>
> (As you will see this is cuts from 2 different e-mails)
>
> >>>The active circuitry in the VF-1 is based on the SSM2163 Quad VCA IC in
> an analogue filter configuration, supported by standard TL072 op-amps
> and of course a pair of ECC82 valves.
> >Thanks for your reply. Please note the typo in my last reply and
> the fact
> >that it is the SSM2164, not 2163 IC that is the active VCA.>>>
>
> I´m curious, cuz I really love the sound of this machine, and I
> wonder how
> much of this amusement is due the valve/overdrive section...
>
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> >
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> Yahoo! Groups Links
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