questions from a newbie (Op Amps again)

[Ingo Debus]

KA4HJH wrote:
> heard of output transistors in a amp running red hot with no signal
> in--turned out there was some high-amplitude ultrasonic oscillation
> somewhere in the circuit!

Yes, just a little more hum that usual, because of the heavy current
drawn from the power supply there's more ripple...

> 
> I find it difficult to solder and answer email while watching my @ss... 8^)

TV repair people use a mirror to watch the screen. Maybe a good idea
here too? ;-)

Ingo