TomG's VCF9a

[tomg]

> IMO, it cannot work the way it was designed.
> Look at the loop gain around the inverting adder, noninverting integrator
> and inverting 2nd integrator.
> 
> (Switch pins 13 and 14 of the 13600 and you have the familiar Oberheim
> scheme.)
> 
> Strange that it's in the layout, too, so it can hardly be a typo.
> Does anybody test these layouts before they get published ??
> (Sorry Tom, no flames intended. But do you actually *build* all this stuff
> yourself ?)
> 
> JH.

I think your opinion is wrong. I don't have time to go over it right this 
minute, but I will. And yes I test everything before posting. I do not
always test pcb layouts. However I always state that it was untested
if that is the case.

I will get this out and help Jorg as soon as I can. Maybe a day or two.
I'm trying to get the vco4 shipped today. Please be patient Jorg. It does
work and does sound very good....I'll be back.

-tg