Yahoo Groups archive

MOTM

Index last updated: 2026-04-28 23:35 UTC

Message

Re: [motm] 490 filter

2003-01-10 by Adam Schabtach

> 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?

I replaced the resistor on mine when I built it for the simple reason that I
used to have an Electrix FilterFactory, and it broke into oscillation at
about 12 o'clock on the knob. This really bothered me because it made the
rest of the knob rotation more or less useless to me. I figured that this
suggested I don't like filters that self-oscillate easily, and hence would
be happier with a modified 490. I'm happy with my modified 490, so I guess I
was right.

--Adam

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.