[sdiy] Discrete Op Amps

[Neil Johnson]

Last year I played around with a discrete module design that was used
in 1970s Calrec desks designed for the BBC, the resulting module is
surprisingly performant:

www.cesyg.com/page/products/integrated-modules/im100524-discrete-signal-amplifier/

There are Neve modules (BA406 etc) which are of a similar architecture
(except a few more transistors to improve biasing, output drive, etc).

One point that often gets lost on the audio op-amp-swapping (it's like
wife swapping but with more pins) crowd is this: by the time the audio
reaches *you* it has passed through maybe 20 or so NE5532 and/or TL072
opamps.

Neil
-- 
http://www.njohnson.co.uk