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Re: [RFI] Can you identify this interference?

To: kr1st@amsat.org, rfi@contesting.com
Subject: Re: [RFI] Can you identify this interference?
From: Pete Smith <n4zr@contesting.com>
Date: Thu, 22 Jan 2004 08:47:58 -0500
List-post: <mailto:rfi@contesting.com>
At 07:57 AM 1/22/04 -0500, Alex wrote:
Hi there,

Since a few weeks I've been plagued with this pulsating type
interference. I can receive the it from 12 MHz up to into the high VHF
range. So far I've found one very wide peak around 19-20 MHz (S9). I can
even see it on TV channel two (antenna, no cable) where it appears as 4
or 5 squiggly lines. Here's a sound sample:


And the image of the recording made by Audacity can be found at:


The recording is made with the receiver on 28.4 MHz USB.

Any suggestions are greatly appreciated.

It looks and sounds to me like at least 2 electric fences at differing signal strengths and with their "tick" interval slightly different. Is that possible, given your QTH? A clean electric fence should not interfere, but often weeds grow into a fence, or insulation breaks down, or the box is not properly grounded. In all of these cases you get small arcs, and voila!

73, Pete N4ZR
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Updated 9 Jan 04

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