[RFI] Low Voltage light RFI

dj2001 at mn.rr.com dj2001 at mn.rr.com
Fri Jul 11 17:02:14 EDT 2003

At 1:33 PM -0700 7/11/03, N6KJ wrote:
>On Fri, 11 Jul 2003 16:12:10 -0400, Pete Smith wrote:
>>  At 01:24 PM 7/11/03 -0400, KE2N at cs.com wrote:
>>  >I ran into this same problem when I installed some halogen "puck" lights
>>  >in the kitchen. Switching supplies wiped out HF reception.  For the new
>>  >house, I specified the "magnetic transformer" option for the lights and it
>>  >is RFI-quiet.
>>  >
>>  >Imagine: magnetic transformers - what will they think of next!
>>  Funny, I have three sets made by GE - 8 lamps total - that use some sort of
>>  switching black lump, and they are totally RF quiet.  The only problem is
>>  that something -- probably their overtemp sensing -- is unduly fussy, so
>>  the darned things keep shutting themselves off...
>>  Wouldn't something like this be soluble by the same sort of filtration as
>>  other switching power supplies?
>Probably, but it is easier to replace the power supply :-)  Since they
>belong to me it's pretty easy for me to replace the supply.  I can't say
>I've had a lot of luck in the past eliminating RFI with filters.  I still
>have a TVI problem that I've never been able to solve, except by moving
>the antenna to a less optimal location :-(
>These supplies are incredibly noisy.  What if they belonged to my neighbor
>instead of me and my neighbor didn't like me?  My question is: why are things
>like this allowed to be sold?

I many times ask myself that very same question.  We have rules, but 
nobody pays attention to them and /or there is no one around to 
enforce, which makes the BPL situation even more scarry.

Dale, K9VUJ

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