[RFI] Electric Fence pulsing (will get worse soon !)

Thu Jul 9 20:33:29 EDT 2015

A note on horses and electric fences. As horses nervous systems are very 
sensitive to shock, most electric fences used around them are woven 
through a plastic strip about 3/4 to 1" wide to make them visible.
At least all those around here are like that.

I've never taken hold of one as I have an implanted defibrillator and am 
supposed to avoid electric shocks and RF at 900 MHz

When I was young, tough, and not to smart, I grabbed hold of some pretty 
strong ones and my arm ached for several days.  Never grab one that 
isn't pulsed. Some of those will burn off any weed foolish enough to 
grow too close<:-)  I don't know if it was a brand name, but we called 
them weed choppers.  Be careful using the back of your hand.  That area 
is kinda fragile.  If I were foing to do it, I'd swipe the end fo a 
finger across the wire. Better to use an NE51 with one lead tied to a 
ground and the other to the fence.

When we built on the NW corner of the farm, we no longer had cattle, but 
my cousin had about a 100 head with one leg of their fence running 
around the S end of the field behind our house about a quarter mile 
distant.  I'd guess the over all length to be around 2 miles.  Any time 
I'd hear it, I'd call them because it meant a portion of the fence was 
shorted and not keeping the cows in and they wanted to know.

73

Roger  (K8RI)

On 7/9/2015 7:22 PM, Mike Smith VE9AA wrote:
> One further question.  The QRM pulses have got louder but I can't confirm
> whether the new section of fencing adjacent to my land is on line or not. I
> think perhaps it's an intermediate section but not the section closest to my
> land.
>   I tried touching it with the back of my hand (gingerly!) but was wearing
> sneakers, standing on thick grass and nothing, nada, zip, zilch, not a
> tingle.  I tried putting an AM radio up there and can hear it, but it's no
> louder 10' away than it is 1" away from the wire-rope.
>
> My question is: Do the large, white, rope-type wires of electric fences
> "FLOAT" in the insulators?
>
> My neighbour put the rope down through the split in a large plastic coated
> eyebolt type of insulator, but then proceeded to put a wrap and a half
> VERRRRY tightly around what I would call the shank of the plastic coated
> eyebolt making it so the wire was maybe 3/8ths-1/2" away from the new cedar
> post he was mounting the ropes on. The shank has little platters/Frisbees on
> it, much like a dipole egg insulator.  Whether he thought it, or someone
> told him, I envision he just thought they were to hold rope.  The rope is
> really close to new 4' cedar posts now.  I think a toddler would be able to
> do a Nick Wallenda across these 6 acres of ropes.
>
> I thought rope type 'floated'?  I don't wish to pee off my neighbour by
> challenging his install methods as I know sometimes you only get one crack
> (two at the most) before neighbours run out of patience and send you on your
> way and never allow you back on their land.
>
> I thought perhaps if I could somehow 'prove' to him his fence was arcing or
> otherwise not providing much voltage (losing it all through the very close
> cedar posts and tall grass) my word would be worth more and I would actually
> be HELPING him keep his expensive Clydesdales in.  Help him...help me.  I am
> thinking of buying one of those multi-voltage HV fence testers and seeing
> how much the voltage spikes were.  IE: If it showed 100v or 1000v, I could
> then demonstrate he's way way below what would keep these giant horses in
> and would then perhaps listen to my other suggestions.
>
> Words of sage advice?
>
> Mike VE9AA
>
> Mike, Coreen & Corey
> Keswick Ridge, NB
>
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Mike Smith VE9AA
> Sent: July 5, 2015 5:23 PM
> To: 'dalej'
> Cc: rfi at contesting.com
> Subject: Re: [RFI] Electric Fence pulsing (will get worse soon !)
>
> Thanks Dale !  Good advice.  I think even though I can hear a bit now, I am
> going to wait and see what it's like when it (the new part of the fence)
> gets really close to me.  Maybe I'll luck out in that when he enlarges the
> fencing area fo the first time, a (bad) corner gets repaired or a bunch of
> weeds grass gets cut or eaten by the horses. (I won't bet on it, but I
> suppose it could happen).
>
> I don't think now is the time to go crying fowl.....In fact, I only just met
> the guy, even though he's only perhaps 1000' from me, it's down over a
> ravine and through the woods from my property and on a different road.
>
> Seems like a nice enough guy and he nodded and whatnot when I told him about
> some fence QRM I had years ago.
>
> Wait and see for now I guess. Gather info....I just downloaded the ARRL
> stuff....(better to respond than react)  Maybe since the grass growth has
> really only taken off in the past ~3weeks that's why I am all of a sudden
> started to hear it?  I haven't really had my HF radio on here the shack in
> well over a month.
>
>
> Mike VE9AA
> Mike, Coreen & Corey
> Keswick Ridge, NB
>
>
> -----Original Message-----
> From: dalej [mailto:dj2001x at comcast.net]
> Sent: July 5, 2015 5:01 PM
> To: Mike Smith VE9AA
> Cc: rfi at contesting.com
> Subject: Re: [RFI] Electric Fence pulsing (will get worse soon !)
>
> I remember back in my youth in a small Wisconsin farming town electric
> fences RF was measured not in hundreds of feet, but in miles.  They radiate
> RF for a long way.
>
> Make sure your neighbor has that fence controller grounded.  Also make sure
> he checks for shorts along the fence or better yet go along and *help*.
>
> We used to hold a blade of grass on the fence and get a buzz (shock), we
> thought it was fun.  Crazy kids.
>
> Good luck and I hope you can get it resolved.  Best to try and remain
> friendly with your neighbor and work it out on a neighborly bases.
>
> 73
> Dale, K9VUJ
>
>
> On 05, Jul 2015, at 13:43, Mike Smith VE9AA <ve9aa at nbnet.nb.ca> wrote:
>
> Hello from NB.
>
>
>
> Recently a neighbour moved in so now my 2ac. lot has an electric fence
> nearby-ish.  Up until now it hasn't been too bad. I am surrounded by hay
> fields and woods.  Recently I noticed the pulses are up to S9 on the lower
> bands and detectable up past 6m.  Wait, it gets much worse.
>
> His fence is currently some 1000' away, but just the past week he's been
> installing new posts and his electric fence will be some 20-30' away from
> most of my antennas very soon. ARGH ! So much for living in the country.
>
>
>
> I can only fathom that the pulses will be off the charts soon so I am
> researching now to get a jump on the impending doom.  The NB handles them
> "ok" now, but I can't really run the 'blanker in a contest environment.
>
>
>
> Are there any proven good electric fence controllers out there? (keeping in
> mind I am in Canada).  His house, yard, fencing etc. is all only ~1 yr old,
> but I am not sure of the electric fence controller is new as well.  I
> haven't laid eyes on what it is I will be battling.
>
>
>
> When he was putting in new fence posts 2 days ago I did mention about past
> RFI I had some years ago from another fence and he seems likely to be able
> to work with me a little if the noise gets worse, so thankfully, I have that
> going for me.
>
>
>
> Still, if I knew 100% of a $100+ controller I could get and simply swap in
> what he has now, I'd do it.
>
>
>
> He's going to be controlling 6-12 acres and keeping in Clydesdale type
> horses (the biggies)
>
>
>
> Mike VE9AA
>
>
>
> Mike, Coreen & Corey
>
> Keswick Ridge, NB
>
>
>
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