I would try to isolate it to the oscillator, the CV conditioning, or
the clock/counter.
I'd start by connecting pin 7 of the LM311 to an amplifier and see if
you can hear the oscillator and if it varies with CV.
When I built mine, for whatever reason, the pk-pk voltage on the
output of the oscillator was only 1 volt and insufficient to clock the
counter.
I ended up changing the MPF102 FET to a NTE466 that I bought locally
and it worked fine with a full 5 volt output.
Dave
the clock/counter.
I'd start by connecting pin 7 of the LM311 to an amplifier and see if
you can hear the oscillator and if it varies with CV.
When I built mine, for whatever reason, the pk-pk voltage on the
output of the oscillator was only 1 volt and insufficient to clock the
counter.
I ended up changing the MPF102 FET to a NTE466 that I bought locally
and it worked fine with a full 5 volt output.
Dave
--- In cgs_synth@yahoogroups.com, casperelectronics <pete@...> wrote:
>
> I just finished building the bi-n-tic filter and I don't seem to be
> getting any osc. output. The filter works great, bandwidth and
damper
> do what they are supposed to do but the frequency controls don't do
> anything. Anyone have much experience with this circuit?
>