[Amps] Bias Scheme

[Steve Thompson]

> I am not thinking about EBS....  I am looking for a way to turn on the amp 
> without using a relay.  Like an optoisolator driving a transistor which would 
> then turn on the amp.  It was not a "pass" transistor to make it look like a 
> high power zener diode, but was a replacement for a relay.

Is this the sort of thing you're thinking of:

http://www.somis.org/D-a-07B.jpg

Steve