Ah, yes; dimmers.
More good detective work, Nick.
Glad the radio tip helped.
I used to use a Variac, a variable autotransformer; no switching noise from them like with triacs. They are big and expensive, but no noise.
Thread: Dimmer switches
http://homerecording.com/bbs/general...itches-305572/
good post
http://homerecording.com/bbs/general...2/#post3419815
his article:
http://ethanwiner.com/dimmers.html