On Sat, 10 Nov 2012 06:41:13 -0600, "Lloyd E. Sponenburgh"
lloydspinsidemindspring.com wrote:

"tm" fired this volley in news:k7kogp$92f$1
:

t's best when they switch on the zero crossings.

It can't be a "duty cycle controller", and switch _only_ on the zero
crossings.

Nonsense. Just cycle skip. It's only heat. Pulse width modulation
averaging across seconds is just fine.

When a device only turns on and off at the AC zero crossings, we call it
a "wire".

Wrong.