Moog VCF Transistor Matching Question

[Rick Jansen]

Mike Granger wrote:
> 
> I've heard that Moog resorted to just matching the upper and lowermost pairs
> as pairs, not pair to pair. 

I did a Moog VCF in the beginning of synth-diy, where the top 2, the 
bottom 2 and the exp generator 2 transistors are from two 3086 ics. 
Works fine! As an extra the exp-generator can be temperature controlled
as in the good old NS app note AN-299. I also did a PCB that is 
connector-compatible with the Formant VCF.

You can find it on: http://www.euronet.nl/~rja/Emusic/Moog/

Rick Jansen
-- 
Web: http://www.euronet.nl/~rja/
email: rja at euronet.nl