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Re: [RFI] RFI-ing myself

To: rfi@contesting.com
Subject: Re: [RFI] RFI-ing myself
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Mon, 30 Sep 2013 09:12:50 -0700
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
On 9/30/2013 6:53 AM, Charlie Gallo wrote:
IF I pull the cable from the Airport, there is no problem (so it isn't the 
stereo picking it up),

Not necessarily. EVERY cable is an antenna. I would not rule out the stereo until I'd tried a "dummy" connector in the line between the Airport and the stereo. Bill Whitlock developed the idea of a "dummy" -- it's a male/female connector combo wired so that the shields carry through but the signal conductors do not. That preserves the "antenna" path, but breaks the audio path, so you can figure out which box is detecting the RF.

and there are LOTS of reports of Airports picking up even FM broadcast.  I'm 
thinking of the bucket, but would need to fins something else that would do the 
job.  Any ideas how to suppress this thing?  I'm betting there is some sort of 
DC>daylight audio response that can be bypassed or something

Do you also have a choke on the power cable to the Airport?

What is the source of "music" to the system? A computer? Anything that has wires attached?

You didn't say what transmitter frequencies are being detected.

73, Jim K9YC
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