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Re: [RFI] LED RFI solved

To: rfi@contesting.com
Subject: Re: [RFI] LED RFI solved
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Sat, 22 Aug 2020 12:08:18 -0700
List-post: <mailto:rfi@contesting.com>
Thanks for posting, Steve. In today's world, a large fraction of RF noise is electronic noise, NOT power line noise. My tutorial app note addresses this, how to tell the difference, how to chase both types of sources. The two links cover the same material, but the second, slides for a talk, is newer and includes more graphics.


73, Jim K9YC

On 8/22/2020 11:35 AM, VE6WZ_Steve wrote:
A church nearby to my QTH decided to install an LED string to the church 
steeple cross.  The RFI was very bad on 160m.
The problem was a very dirty Hanley LED driver switch-mode supply.  Replaced 
with a Mean Well unit and now all is quiet.

I made a YouTube video showing the isolation, testing and solution.  Some of 
these LED drivers are EXTREMELY noisy, but they don't need to be!

https://youtu.be/tvjRwZTNLHs <https://youtu.be/tvjRwZTNLHs>

73, de steve ve6wz
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