[TenTec] ? Electric fence noise

[Rod Greene]

I agree with Carter. I’ve tracked down many noisy electric fence problems. 99 pct are due to bad connections and often with  the spring loaded gate handles. They loosen up over time and an arc is caused at that point. Easy to find with a portable AM radio. GL, Rod/w7zrc 


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On Tuesday, May 4, 2021, 8:16 AM, Reed Krenn <reed.krenn at gmail.com> wrote:

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
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