[sdiy] Super SEM VCO

[Michael Ruberto]

It's true, I am now legally insane, mad to the hilt, toys in the attic, etc 
etc! Here's why....

I have spent way too much time designing my new VCO. It has been a looong 
and arduous process. I have had to redesign it many times due to extinct 
parts such as the 3080 and it's fallen bretheren.
My son has grown 18" and my wife lost her teeth and went grey since I 1st 
began :-0
Ok enough of my yapping...

http://frankentron.freezope.org/source/REV4-2.gif

Thanks to Jörgen and Jürgen for inspiration. Maybe I should rename this the 
"Oberheim Jürgen Jörgen VCO" ;-)

Hey check this out, the Japanese have nothing on me when it comes to compact 
design!!!

http://frankentron.freezope.org/source/PCB_rev4-2.gif

That's 66 resistors, 8 trimmers, 18 transistors, 4 ICs, 4 Molex headers, and 
a handful of caps on a 3.8" X 2.5" PCB with .030" traces! Maybe I will 
design subcompact cars in my next career ;-)

M. A. Ruberto