To: | Rfi List <rfi@contesting.com> |
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Subject: | Re: [RFI] is there any hope for a new keurig single cup coffee machine/ |
From: | Jim Brown <jim@audiosystemsgroup.com> |
Reply-to: | jim@audiosystemsgroup.com |
Date: | Fri, 26 Jul 2024 14:33:39 -0700 |
List-post: | <mailto:rfi@contesting.com> |
On 7/26/2024 12:35 PM, David Eckhardt wrote: They are designed to attenuate both common mode and differential mode unwanted energy. There's a problem with that statement. It's that what EMC Regs (and testing) calls common mode is not what Mother nature calls Common Mode -- that is, it creates a net current on the cable that causes it to act as an antenna -- that is, to radiate. The most effective suppression for that is a ferrite choke that is near resonance at the frequency(ies) of interest. I discussed that in later versions of k9yc.com/RFI-Ham.pdf so be sure to get it from my website. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi |
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