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From: west@sdics.UUCP
Newsgroups: net.consumers,net.sci,net.audio,net.video,net.analog
Subject: Re: Line Voltage
Message-ID: <194@sdics.UUCP>
Date: Thu, 5-Jun-86 23:53:57 EDT
Article-I.D.: sdics.194
Posted: Thu Jun  5 23:53:57 1986
Date-Received: Sat, 7-Jun-86 14:21:50 EDT
References: <446@hropus.UUCP> <5436@alice.uUCp> <1039@kitty.UUCP>
Reply-To: west@sdics.UUCP (Larry West)
Organization: UC San Diego: Institute for Cognitive Science
Lines: 27
Xref: watmath net.consumers:5437 net.sci:1017 net.audio:8647 net.video:2627 net.analog:876

In article <278@chronon.chronon.UUCP> eric@chronon.UUCP (Eric Black) writes:
>  [ . . . ]
>                       Their (PG&E's) attitude was that their power was
>  good enough for all their other customers, their monitor didn't show
>  any problem, so it was just too bad.  We ended up installing a moby
>  isolation transformer to get rid of common-mode spikes, and an UPS just
>  as a line filter.  We still had occasional unexplained crashes...

I don't understand.   The Uninterruptable Power Supply we
had at the last place I worked (it's still there) effectively
and completely isolated our power sinks from the SDG$E line
power.   Never had a problem with power after that -- after
all, we were drawing our power from about 15 car batteries,
which were constantly being recharged from SDG$E power.   I
was present at over ten power-outages (including a few
lightning-related ones) and our equipment never even
hiccupped.   Our line-monitoring equipment never saw
anything evil on the line, either (though we didn't have
it connected all the time).

So my question is, how can you claim that it must be
PG&E power [which I'm sure is as dirty as you say] when
you have isolated yourself from it with a UPS and you
still have the crashes?

-- 
Larry West, west@ucsd.edu