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Re: [RFI] Unusual subharmonic RFI

To: rfi@contesting.com
Subject: Re: [RFI] Unusual subharmonic RFI
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Fri, 11 Nov 2016 14:33:37 -0800
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
On Fri,11/11/2016 1:13 PM, Dave Hachadorian wrote:
I can hear a loud, buzzy, broad signal centered on 7.030, and I can also hear its third harmonic on 21.090.
W3LPL has said that "buzzy" distortion products are typically produced 
in AC-powered devices like SMPS and even antenna rotators. As I 
understand it, this is simple rectification and re-radiation. If you 
can't repair the mechanism (like K1TTT described) or replace the 
culprit, the next best approach is to choke the wire(s) receiving and 
re-radiating the distortion.
73, Jim K9YC


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