In article ,
Andy Dingley 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.

Indeed. Didn't say they were all ideal for this. And of course the design
of the dimmer can come into it too.

--
*TEAMWORK...means never having to take all the blame yourself *

Dave Plowman London SW
To e-mail, change noise into sound.