Cgs synth

>The thing that's throwing me for a loop is i'm not getting any change in

voltage off pin 10 of the 3900.I'm assuming i should be seeing the voltage
i'm feeding that pulse input and able to see pin 10 go high and lo

Yes, you should be able to see that. They are just being used as comparators.
Find out what voltage is at the junction of the 8k2 and 10k voltage divider
resistors.

Ken

_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>