[sdiy] Vacuum tube opamp datasheets

[epeasant at telusplanet.net]

Happy New Year, everyone!

For those tube heads who are interested, as well as others 
who might want to learn a bit about early op amps (before 
transistors), I have posted a copy of the George A. 
Philbrick Researches GAP/R K2 series op amp applications 
manual. See:

http://www.angelfire.com/electronic/epeasant/circuits/circui
ts.html

It's under Data Sheets, about half way down the page.

It's 27 pages, covering a wide range of computing 
functions, including an adjustable lag circuit that looks 
very similar to the basic portamento circuit used by many 
Synth DIYers. I'd be very interested to hear other's 
comments on the material presented here (first published 
1956).

Take care,
Doug
______________________
The Electronic Peasant

www.electronicpeasant.com