[MLB-WIRELESS] Power over Ethernet

[Tony Langdon]

> However, I was always a TTL man when I was into electronics, 
> so take my
> AC/DC with a grain of salt :-)

Well, you're pretty spot on with regards to AC/DC.  Actually, the losses for
AC should be slightly higher (though probably not detectable), if anything,
due to skin effect and EM radiation, but for practical purposes, the AC and
DC losses at the same voltage will be about similar.  You are also right
that stepping up to a high voltage does reduce transmission losses (which is
the major reason AC is used in power distribution), but somehow I can't see
11kV or even 240V being carried safelu up Cat 5 cable... so we're stuck with
low voltage...

One advantage AC will have though is there's much less risk of electrolysis,
so it may have a bearing on how long some parts of the system last before
corroding.

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