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[CQ-Contest] LED Lighting RFI

To: CQ Contest <cq-contest@contesting.com>
Subject: [CQ-Contest] LED Lighting RFI
From: K9MA <k9ma@sdellington.us>
Date: Fri, 13 Oct 2017 14:37:52 -0500
List-post: <mailto:cq-contest@contesting.com>
Last winter, I tracked down some bad RFI to a neighbor's LED lighting system.  Replacing the power supply completely eliminated the interference.  I just bought a similar one for my own home and tested it for RFI, finding none at all from 160 through 20 meters.  Antennas were less than 25 meters from the power supply and lights.  I have plenty of other noise in this urban location, so there might be noticeable RFI in a quieter location, but this power supply is certainly a lot quieter than many of the others in the neighborhood.

I can recommend the Armacost power supplies manufactured by MOX Lighting, models MD24W12VA and MD45W12VA.  The 60 W version from LTF Technologies was the bad one, but Armacost told me they were dropping that vendor, and the MD60W12VA Armacost sells now appears to be made by MOX, though I haven't tested it.  By all means, stay away from anything manufactured by LTF Technologies.

It appears it really IS possible to build low-cost switching supplies that don't generate enormous amounts of RFI.


Scott K9MA

Scott  K9MA


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