[RFI] Low Voltage light RFI

N6KJ 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?

More information about the RFI mailing list