I changed the resistor on mine, to 68K. It broke into oscillation too
soon to suit me, even though that was the accurately modeled response to
the filter Paul was duplicating. The only downside to the resistor
change is that with a signal input I cannot get as "pure" a sine wave
output from the filter at full resonance. There always seems to be some
bleed/distortion from the input signal on top of the sine wave. Without
an input this shouldn't be an issue.
John Loffink
jloffink@... > If you have one, I am curious as to the point on the res control where
> your
> stock 490s begin to self oscillate. Paul was kind enough to clue us
in on
> which resistor we could replace to change that self-oscillation start
> point.
> I am wondering where others are and if they elected to do this, and
why?
>