[sdiy] 2164 Expo VCO tracking

[Paul Perry]

At last! A synth-diy use for those old RF plate tuner caps!
(typically 15 to 250pf)

paul perry melbourne australia

----- Original Message ----- 
From: "David G. Dixon" > It's just a 100pF cap from the comparator 
output/JFET gate (same trace) to
> ground.  It is essential.  100pF may be slightly too large, but 47pF is 
> too
> small and 120pF is definitely too large.  I'm going to get some inbetween
> values today to try, but 100pF works.