[TenTec] ? Electric fence noise

[Reed Krenn]

Are you absolutely sure the fence is the culprit? I ask because I had a
similar trouble with a strong pulse, at about a 1Hz rate, appearing in my
receiver on 40M. I and a friend went searching with a VHF AM receiver, and
found an electric fence around a pasture, about half a mile due west of me.
The fence was emitting 1Hz pulses that varied in amplitude along the length
of the side parallel to my 40M dipole. I contacted the owner, and he agreed
that the fence was due for some repairs, and that if I could be patient, he
would get to it over the next few months. Several months went by with no
improvement, and I was about to revisit the owner, when I decided to
rearrange a few things in my shack. I was under my desk, tidying up some
cables, and I unplugged a wall wart power supply that was attached to a USB
hub. My receiver was on 40M at the time, and the pulse noise went away. I
plugged it back in, and the noise returned.

That wall wart, a switching supply, met a gruesome fate.

Naturally, I called the owner of the fence and apologized profusely. He was
very gracious, and was actually glad that I had inspired him to do some
much needed repairs.

Moral of the story: Make absolutely sure your own house is in order before
casting about for external causes.

Reed / WW3A

On Tue, May 4, 2021 at 9:55 AM CARTER GRABARCZYK <k8vt at ameritech.net> wrote:

>  I chased RFI for a living at AT&T. It seems you are looking at this issue
> from the wrong side. In my experience, most cases of electric fence noise
> was caused by defective insulators or corroded connections and thus the
> responsibility of the fence owner to repair. Most were cooperative as it
> was probably noising up their radio, TV and phone service.
>
> For those that did not cooperate, it was pointed out that they were
> violating Part 15 of the FCC rules and may ultimately have to deal with the
> FCC.
> Just my 2 cents...
> Carter   K8VT
>
>     On Monday, May 3, 2021, 10:11:13 PM EDT, Rodney Dewald via TenTec <
> tentec at contesting.com> wrote:
>
>  WHERE DID YOU PUT THE CHOKE      I HAVE LATTER LINE TO A 4TO 1 BALEM
>
> Sent from Mail for Windows 10
>
> From: Ralph Matheny
> Sent: Monday, May 3, 2021 9:14 PM
> To: ah7i at gatech.edu; Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] ? Electric fence noise
>
> I use electric fence here to keep deer out
> of my tomato patch.  To keep the fence out of
> the radio I have a choke...3 turns well insulated
> wire on a good sized #31 toroid, and I can't tell
> the thing is on or off with the radio.
>
> Your results may vary...every fence and charge will
> probably be different.
>
> de K8RYU
>
>
>
>
> ________________________________
> From: TenTec <tentec-bounces+mathenyr=marietta.edu at contesting.com> on
> behalf of Bob D. <ajamas.rn at gmail.com>
> Sent: Monday, May 3, 2021 6:35 PM
> To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
> Subject: ? [TenTec] Electric fence noise
>
> *** CAUTION: This email is not from Marietta College. Do not click on
> links or open attachments unless you recognize the sender and trust the
> content is safe. ***
>
>
> An electric fence charger may be modified for a longer rise time. Like
> softening keying to eliminate clicks.
> 73, -Bob ah7i em73ts
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>