[RFI] Low Voltage Patio Lights

Jim Brown jim at audiosystemsgroup.com
Sun Sep 7 10:55:55 EDT 2008

As far as I know, these lights work on 12VAC, which means that any 12V 
transformer rated for the application would work. Unfortunately, they are 
physically larger than the switching power supplies, and they probably cost 
a lot more. 

And, what's worse, it's almost impossible to find a real transformer for 
this application in the electrical supply chain. The local supply store 
here in Santa Cruz gives a blank stare when you ask for one. 

And THAT isn't even the worst part. Nearly all modern lighting fixtures are 
now made only as low voltage lighting fixtures. You almost can't buy a line 
voltage fixture any more!  I've got lighting catalogs full of so-called 
"line voltage" track lighting fixtures that really use 12V lamps and have a 
switching power supply in their base that fits onto 120V track!

Coming soon to a renovation near you. Good bye ham radio. 


Jim Brown K9YC

On Sun, 07 Sep 2008 07:00:09 -0700, R March wrote:

>I now have a problem with a neighbors outside low voltage patio lights. 
>  It generates 20 over 9 noise on 160, caused by the power supply;  not 
>a transformer but a switcher.  So the question is: does anyone know of a 
>low voltage outdoor/patio lighting system with a built-in light sensor 
>that does not make noise? Maybe one that uses an actual transformer? 
>What an innovation.

>Another question.  Who does one contact at the FCC now that Riley 
>Hollingsworth has retired?    Thanks,  Bob  N7UA

>BTW, It sure would be great if there were a data base of systems that 
>don't make noise, say maintained by the ARRL, where hams could find 
>solutions to these problems.
>RFI mailing list
>RFI at contesting.com

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