Various Power Issues, was: Gas Refrigerator (was 25 Hz Power) |
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Danny Burstein (dannyb@panix.com) Sat, 18 Mar 2006 02:00:51 UTC
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In <telecom25.109.8@telecom-digest.org> hancock4@bbs.cpcn.com writes: [ misc snips ]
> T wrote:
>> Unfortunately for me I've never heard a live electromechanical
> Telephone switches have a distinctive sound. The clicks and clacks are
The closest you'll find to this nowadays is in older elevators.
Prior to 1980 or so the controllers on automatic (as opposed to
Next time you get into one, especially in older buildings, listen for
(These are, of course, getting phased out by electronic controls, but
> Places with critical functions likes hospitals and nursing homes have
A hospital complex with which I'm acquainted in NYC had an executive
( details slightly changed both due to memory fade and to protect the
Early one afternoon, when they were throwing a "nurses and EMS and
( She chose this day deliberately since there would be plenty of extra
Most stuff did ok, but lots and lots of issues showed up.
> failure. I believe it was caused by surges in an Ohio system that
There's a simple (well, not quite so simple ...) way of significantly
A hefty percentage of new circuits are, in fact, using direct current,
(No doubt we'll find other failure modes ...) |
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