[RFI] Invisible Dog Fence

Don Kirk wd8dsb at gmail.com
Sun Mar 22 08:42:15 EDT 2015

Hi Mike,

I actually installed one 3 years ago and it is actually installed above
ground on top of my chain link fence.  I operate 160 meters and could hear
it on 160 meters (and had the power level turned down a considerable
amount).  Then I installed some radio shack cores on each leg of the loop
as it exited the transmitter (22 turns per core) and this fixed my problem
on 160 meters.  I can still hear it if I listen down around 600 kHz and
below.  My invisible fence transmits at approximately 8 kHz as I recall.  I
helped neighbor install identical system underground 5 feet from my
property line and have no problems with his system on 160 meters.

Side note : I actually analyzed the signal and made (designed and built) my
own transmitter to mimic the 8 but code it transmits as a back up to the
original transmitter in case the original transmitter ever fails.


On Saturday, March 21, 2015, Mike Ryan <mryan001 at tampabay.rr.com> wrote:

>  Has anyone had any experience with either owned or been in close to
> someone's home that incorporated an invisible dog fence of one kind or
> another?  I was just informed that my new next door neighbor is going to
> have one put down and I am wondering if this is going to be a nightmare or
> not...  - Mike
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