[R-390] OT? Dimmer buzz, solution?

[Flowertime01 at wmconnect.com]

Fellows,

These lamp dimmers come in two flavors,
Those with lots of RF trash and those with less RF trash.

You can use a SCR and have lots of trash.
Or you can use a TRIAC and have somewhat less RF trash.
Using a TRIAC will not ensure that you do not get lots of RF trash.

To get lots of RF hash and trash turn the power on in the middle of the cycle
and off at the zero crossing point. SCR perform this way. TRIAC's may also be
operated this way.

To get less trash and hash turn the device on some where in the middle of the 
cycle
and off as the device goes through zero crossing.

Needless to say a comparator to turn the device on in mid cycle and off at 
zero
crossing is more expensive than the cheap devices.

OK a challenge to all.
IF you have a quite one that you like,
Open it up, and post the part number and manufacture here for everyone.

If you have a noisy one please post that part number and manufacture here 
also.
We can avoid buying one of these.

Sort of a consumer report best of dimmer product if you will

Roger KC6TRU