[sdiy] Music Easel timbre generator, resistors in parallel

[Aaron Lanterman]

Hmmmm....

http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_2080_9_200.jpg

It doesn't use the CA3160s for rail-to-rail operation like in the 259 
timbre generator - it uses the RC4136, which look to me like a quad 
version (with weird pinout) of the 4558. The schematics of the two op amps 
look identical.

Anyway... in addition, Buchla does this weird think with resistors in 
paralell. Like, there's a 49.9K 1% in parallel with a 5% (I guess) 390K... 
and a 1.5 Meg (5% I guess) in parallel with a 75K 1%. What's the logic 
there? Why not just put down a 72K 1% or whatever?

- Aaron, trying to understand the depths of Buchlalogic

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Dr. Aaron Lanterman, Asst. Prof.
and Demetrius T. Paris Junior Prof.    Voice:  404-385-2548
School of Electrical and Comp. Eng.    Fax:    404-894-8363
Georgia Institute of Technology        E-mail: lanterma at ece.gatech.edu
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