Re: [tlug] OT - Shutdown day

["Daniel A. Ramaley" <daniel.ramaley@example.com>]

On Thursday 17 April 2008 21:16, Curt Sampson wrote:
>On 2008-04-18 08:52 +0800 (Fri), Keith Bawden wrote:
>> I wonder what the effect of switching over to DC would do.
>
>One possibility is that it would increase efficiency by reducing the
>number of conversions from AC to DC and back again.

How efficient are DC->DC conversions compared to AC->DC? I'm thinking 
that even if you feed a computer DC, that DC probably isn't going to be 
on the specific mix of voltages that the computer wants, so some 
conversion is still going to have to be done. Probably the incoming DC 
would have to be at a fairly high voltage, much as AC is; you'd need 
some rather massive wires to carry the 10 or 20 amps a computer would 
need at a lower voltage.

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