[RFI] Invisible dog fence RFI

[tony.kaz at verizon.net]

Hi Joe,
The filter that was installed took care of the problem. I can now put a portable radio tuned to 160M right on the ground above the buried wire and not hear anything.
73,
N2TK, Tony 

-----Original Message-----
From: Joseph Bouchard <joek1vw at gmail.com> 
Sent: Monday, January 18, 2021 12:06 PM
To: tony.kaz at verizon.net
Cc: Michael Coslo <mjcn3li at nittany-arc.net>; rfi at contesting.com
Subject: Re: [RFI] Invisible dog fence RFI

We have one at my house.  A couple of toroids silenced it almost completely, but I don’t have ground antennas.  In my case the wall wart power supply for the transmitter was 80% of the noise and the buried wire was 20%, but that might not be the case for you.

Can you conveniently move your antenna away from it, even if it’s just 20’ instead of 10?  Or make it so it’s not parallel, with a small zigzag?  The next suggestion would be to ask permission to install toroids on the fence. I used snap on type 31 with 1/2” ID.  I wrapped the wire through that as many times as would fit and snapped it shut.

Good luck,
Joe K1VW

> On Jan 17, 2021, at 4:58 PM, Tony via RFI <rfi at contesting.com> wrote:
> 
> Mike,
> When the neighbor had his buried electric dog fence installed it wiped out 160M when listening on the BOG that was in parallel and about 10' from his buried wire.  There were no issue son any of my other antennas which are farther away. I contacted the manufacturer of the system (the local contractor had no idea) about the problem. He sent a filter to the contractor and gave him instructions on how to install. No problems since.
> 3,
> N2TK, Tony
> 
> -----Original Message-----
> From: RFI <rfi-bounces+tony.kaz=verizon.net at contesting.com> On Behalf Of Michael Coslo
> Sent: Sunday, January 17, 2021 1:17 PM
> To: rfi at contesting.com
> Subject: [RFI] Invisible dog fence RFI
> 
> The folks next door are installing an invisible dog fence. While I’m not worried about invisible dogs, I’ve driven by some places that have them some time ago, and they do generate RFI.
> 
> Has anyone here worked with anyone here to mitigate RFI from these things and might have some hints? 
> 
> - 73 Mike N3LI - 
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