[RFI] ARRL to FCC...

Pete Smith N4ZR n4zr at contesting.com
Fri Aug 1 06:40:01 EDT 2014


Jim, for whatever it may be worth, we have 8 2-bulb Kichler Xenon under 
cabinet fixtures in our kitchen, which is directly below my shack.  I 
have never noticed any noise from these on HF.  We did have them all 
fail, one after another, over a period of years, apparently because the 
switching power supplies went south, but Kichler replaced them without a 
flicker, so they must have known there was a design issue.

Looking at Kichler's current offerings, they seem to offer both units 
with built-in switching supplies and units designed to be powered from a 
central 12V supply. Wouldn't it be feasible to stash one large 12V 
filament transformer in the back of a cabinet and wire the lights from it?

73, Pete N4ZR
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On 7/28/2014 11:43 AM, Jim Brown wrote:
> On 7/28/2014 7:30 AM, Hare, Ed W1RFI wrote:
>> But lighting controllers operating 58 dB over the FCC limits ARE a 
>> major threat, and we are getting new reports every week.
>
> I strongly agree, Ed. I first encountered this in the home that we 
> bought in California in 2006. It has several low voltage lighting 
> fixtures, all run with what the electrical supply houses call 
> "electronic transformers." They are unbranded and unlabeled, and they 
> are noisy switching power supplies.
>
> These little boxes are, for all practical purposes, the only way to 
> power these devices because a real transformer is four times the size 
> of the electrical back box into which it must fit. If any clean 
> supplies exist, I sure would like to know about them.
>
> 73, Jim K9YC
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