On Wed, 02 Nov 2005 15:59:37 +0000 (GMT), "Dave Plowman (News)"
wrote:

Any transformer can be 'dimmed'.

That's a rather risky statement. The extra harmonics from the average
phase choppng dimmer are going to increase losses in an average
transformer core, leading to excess heating. It's "dimmable" but you
need to allow for potentially a large derating in output, hot running
and a loud buzzing noise.