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Message

490 filter

2003-01-10 by J. Larry Hendry

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.

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