[RFI] Low Voltage light RFI
kelly at thejohnsons.ws
Fri Jul 11 14:33:51 EDT 2003
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?
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