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Re: [RFI] 160m-5mhz noise?

To: "rfi@contesting.com" <rfi@contesting.com>
Subject: Re: [RFI] 160m-5mhz noise?
From: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Thu, 05 Nov 2009 22:56:39 -0800
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
On Thu, 5 Nov 2009 21:39:46 -0500, Charlie Gallo wrote:

>switch mode supplies CAN be made to be as RF quiet as any linear supply.

Yes, if you're the designer and manufacturer. There's considerable 
detailed design advice in Henry Ott's new book. But a nasty twist -- 
boards are built and EMC tested with suppression components, but products 
are shipped with those components missing (and, of course, WITH the EMC 
compliance stickers).


Jim K9YC 

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