I'm referring to the original "R12" VCFs as fitted to my 1973 unit.
There's a poor quality schematic that is easilly foundon the web that
has a "audio - sub" switch shown on it. On my PCBs, these components
are fitted, but there is, and never was, a switch to activate them.
Don's slightly later filters on the same PCBs don't even have the
extra capacitors fitted.
There appear to be similar switchable caps on the VCFQ too.
Ken
There's a poor quality schematic that is easilly foundon the web that
has a "audio - sub" switch shown on it. On my PCBs, these components
are fitted, but there is, and never was, a switch to activate them.
Don's slightly later filters on the same PCBs don't even have the
extra capacitors fitted.
There appear to be similar switchable caps on the VCFQ too.
Ken
--- In SergeModular@y..., "darreljohansen" <darrelj@a...> wrote:
> --- In SergeModular@y..., sasami@h... wrote:
> > The original VCF had a subsonic range that was usually not fitted,
> and it
> > seems, never brought to the panel. No doubt this was what Serge
> had in mind
> > at the time.
>
> I'm not sure which filter you are referring to, but in most modules
> the dividing line between control voltages and audio signals was
> pretty much user controlled. The original slews could be used a
> portamento devices or as oscillators.