BG>P.S> Thanks for your comments. I intend to support this echo as long as
BG>there remains a Fidonet.. There's getting to be a number of folks that
BG>have experienced newsgroups and are coming back to the echos because
BG>they suit them better. Something like how vinyl is making a
BG>retrocomeback for some people.
I've heard from people who say that Usenet has more variety, but
the signal has slowly disappeared into the noise.  Moderated
conferences _are_ better.
I enjoyed your essay on ground loops, but I'm still perplexed.
A few years ago I built a surprisingly good hi-fi preamp by cobbling
together some op-amp circuits from a Walter Jung book.  In the
matter of grounds, I took every ground I could think of, from
chip grounds to cable grounds to any old grounds, and tied them to
a single rail.  I've never tested this preamp with really esoteric
equipment, but as far as I can tell the hum is inaudible.
Did I done good, or is there a better method?  Should the 'star ground',
chassis and all, be connected to the third wire on the AC cord?
I think the smartest thing I did for reducing hum was to put the
AC transformer in a separate box in the back of the preamp.
The only 60Hz AC in the main area is about 3 inches of +20 and
-20V AC from the transformer.
 * SLMR 2.1a *    This Rorschach guy ... such pornography!!!  
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