In message , Dave xxxxx
writes
Paul Dormer wrote:
For the uninitiated, the Gaincard is a simplistic amplifier produced
by 47 Laboratory, which at it's heart uses apparently mundane National
Semiconductor's IC opamps. The DIY fraternaty reverse engineered the
Gaincard and now *hundreds* of people worldwide are building Gaincard
clones or modifications thereof, referred to as Gainclones.

I have now read a few reviews of these amps and, for the most part, it
seems reviewers have *transandental* experiences with them.

Comments..?

Have you a link to any information ?



--
Dave xxxx
www.davewhitter.myby.co.uk

Music is Art - Audio is Engineering
Steam is Fun







An LM3875 makes a useful little amp. It's basically a power op-amp with
just the five active pins, so it's easy to wire up a neat design.

I've got a three channel LM3875 amp I built to try out active crossover
networks to drive the bass, middle and tweeter of speakers. I've used
stabilised +/- 35V rails and it sounds and measures pretty well.

(Actually, the wiring structure is important, I've heard of marginally
stable 3875 amps where people don't know how to return signals to the 0v
line in the right place.)
--
Chris Morriss