[RFI] Can you identify this interference?

[Pete Smith]

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:
>
>http://www.kr1st.com/interf.wav
>
>And the image of the recording made by Audacity can be found at:
>
>http://www.kr1st.com/interf.gif
>
>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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