On Tue, 21 Jun 2005 01:23:11 +0100,it is alleged that "Dave Plowman
(News)" spake thusly in uk.d-i-y:

In article ,
Capitol wrote:
I noticed some comments earlier in the thread on the phasing problems
of 400Hz. There are no problems if the main distribution system is HVDC.
This is why major power links have been HVDC for many years AIUI. The
50Hz local distribution system is purely historic and well entrenched
but the transformer sizes could be substantially reduced with 400HZ.

One problem is it's slap in the middle of the most sensitive part of the
human audio band. Expect the average transformer to make the most annoying
noise.

Good thought, ouch. 400 Hz is the NU tone frequency before BT started
using silly announcements, I would _not_ want that in the substation
next door.

--
"The perfect computer has been developed. You just feed in your problems
and they never come out again."
- Al Goodman.