Eric Gustafson wrote:
>
> Gary,
>
> You are absolutely correct about the normal pot controlled dimmers.
> However, in the above statement I was specifically referring to _touch_
> controlled dimmers. The touch control circuitry for these dimmers is the
> culprit in the "off but still powered" state. For some reason even the
> touch controller source is somewhat reduced when the load is receiving full
> power. But when the load is unpowered, the touch controlled dimmers either
> produce more noise or radiate it more effeciently than at any other
> setting. The touch controller is also the source of the 20 KHz patches
> of noise spaced every 200 KHz. The ordinary dimmers don't have this
> characteristic. They are simply wideband noise sources.
>
> Thanks for the good information on a source for (relatively) quiet
> dimmers. I won't allow any dimmer in my house that can't be turned off
> with an integral mechanical switch. At least I can silence those without
> pulling the plug.
>
> 73, Eric N7CL
Thanks for the clarification! I had forgotten about THOSE inventions
from Hell.
I think I only have one dimmer in this house, on a headboard reading
lamp---and I am considering getting rid of it.
I really appreciate the info on touchlamps.
--
Garry Shapiro, NI6T
Editor, The DXer
newsletter of the Northern California DX Club
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