Mine starts at about 4 at certain frequencies. I'm thinking about
doing the mod because this is too low...
--- In motm@yahoogroups.com, "J. Larry Hendry" <jlarryh@i...> wrote:
> Well, I know I am behind most of you on this one. But, I finally
fired up
> my 490 filter tonight. Paul made my brain hurt with the math in
the theory
> of operation docs. But, it got much better once I heard that
lovely sound.
>
> The self oscillation tracking on mine was very good well above
where Paul
> said it would be good. This is one nasty (in a good way) sounding
filter.
> It is certainly "different" than anything else in the MOTM stable
(including
> the 440 Low pass which I so dearly love).
>
> If you don't have one, sell your kids and get one. :)
>
> 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?
>
> Kudos to Paul for another GREAT module.