[sdiy] ms20 filter questions

[Dan Snazelle]

using Renee's version as a starting point, i built an ms20 filter on breadboard using 13700's and a tl074.

http://www.uni-bonn.de/~uzs159/rs20.png

it does sound good BUT I am having a few problems:

1. it seems to almost ALWAYS self-oscillate if there is no input plugged in. only the first 5 percent or so of the pot does NOT self-oscillate. i would love to know how to REDUCE this!

2. when i DO have an input plugged in, it doesn't self-oscillate too much with diodes but a good amount with LEDS. 

i suppose my worry is that this filter only works right with a signal plugged in.

i would love to hear about others experiences with this filter or with other ms20 clones.

thanks!


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