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[RFI] Non-transmitting tower causes RFI/EMI?

To: <rfi@contesting.com>
Subject: [RFI] Non-transmitting tower causes RFI/EMI?
From: "Rick Low" <n6cy@earthlink.net>
Reply-to: n6cy@earthlink.net
Date: Tue, 13 Nov 2007 21:47:46 -0500
List-post: <mailto:rfi@contesting.com>
For the past year and a half my neighbor has claimed frequent interference
to his Kidde "Nighthawk" Carbon Monoxide detectors. While we've been able to
prove a few frequency/power combinations that definitely result in false
alarms, a majority of the "alarms" occur when I'm not transmitting at all!
The neighbor's claim is that my tower (and by extension, the yagi on it) is
somehow 'reflecting' another signal in the neighborhood and causing the
false alarms.
I've tried to explain the implausibility of the claim, and even tuned
through the HF spectrum during some of these false alarms, without finding
any signals that to me would obviously be strong enough to cause them. But
the belief remains in my neighbors' mind that I am the cause of the abnormal
occurrences in their house. My house is experiencing zero false alarms
during the same period.
So the question for the community: Is my neighbors' claim valid? How might I
go about helping to prove (or disprove) it?
Many thanks for your candid thoughts. 73 Rick N6CY/4
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