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I took some advice and wired the frequency pots +V and -V instead of +V and Gnd. The filter works fine now. I'm going to experiment with limiting the range of the frequency pots.
analogcraftsman:
It greatly increases the range of the cutoff frequency if you connect the CCW lug of the pot to -VE and the CW lug to +VE.
TEST CASE 1:
with layout for Spread source are the infos above.
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picture: Failure 1, no 100K resistor from spread pot to CVSN
Failure 2: frequency pot is connected to GND, but must connected to -VE
a copy of ken stones page:
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