[sdiy] Transistor pair swaparounds...

[Aaron Lanterman]

In my office hours today, I handed out baggies of synth parts to students 
who came by. I felt like a dealer: "pppst, hey kid, want some 3080s? 
First chip's free..."

A lot of the students are working with filters where they have a 
voltage-to-current expo converter circuit. I don't understand all the 
subtleties of such things myself...

...anyway, I had a limited number of SSM2210, SSM2220, MATs, LS, etc... 
and no THAT chips... so mostly I handed out 2SC1583 and 2SC798s and some 
CA3083s and CA3046s,

Can these things be swapped around without ill effects? Or will trying to 
put a 2SC1583 into a circuit designed for a MAT or vice versa cause 
horrible badness (other than a 2SC1583 having lower specs than a MAT...)

- Aaron

P.S. I had my first student to send me a draft schematic send me a 
schematic (redundancy specialists, who specialize in redundancy) - he's 
trying a HP/LP cascade, like the MS-20, but based ofn a vactrol approach 
modeled off of the Buchla LPG, but with resonance... ;)

-----------------------------------------------------------------------------

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
Mail Code 0250                         Web:    users.ece.gatech.edu/~lanterma
Atlanta, GA 30332                      Office: Centergy 5212