[sdiy] Circuit Boards / kits

[harrybissell at wowway.com]

On Wed, 24 Sep 2008 18:22:38 -0400, Roy J. Tellason wrote

> So what do they use for a VCA?

A differential pair, a transistor to sink current through the emitters,
and an opamp to revover the signal.  I added 1% resistors and it works
very well.  I think its a 741 (or 748)

schematics are online (somewhere)

H^) harry


Harry Bissell & Nora Abdullah 4eva