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Re: [RFI] 10m RFI "white noise hiss"

To: "k3lr@k3lr.com" <k3lr@k3lr.com>,"Patrick Dyer" <pjdyer@swbell.net>,"rfi@contesting.com" <rfi@contesting.com>,"w1mg@arrl.net" <w1mg@arrl.net>, "w3otc@amsat.org" <w3otc@amsat.org>
Subject: Re: [RFI] 10m RFI "white noise hiss"
From: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Sat, 10 Nov 2007 13:24:33 -0800
List-post: <mailto:rfi@contesting.com>
On Sat, 10 Nov 2007 14:13:28 -0600, Tim Duffy K3LR wrote:

>I have found that the W3NQN AC line filter can fix this kind of 

I would expect that most good line filters would also work -- IF 
properly installed, and IF the trash is being radiated by the power 

BUT: the trash may also be radiated by the power cord (between the 
filter and the noise source), by the audio and video cables, and by 
the internal wiring (it was noted that it's in a plastic case). For 
the cable parts of the problem, if they exist, a ferrite choke wound 
to provide good suppression in that part of the spectrum is in 
order. See my tutorial for details. Not much of anything you can 
easily do about shielding problem. 


Jim K9YC

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