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Re: [RFI] A RF Quiet Electric Fencer needed

Subject: Re: [RFI] A RF Quiet Electric Fencer needed
From: "Roger (K8RI)" <k8ri@rogerhalstead.com>
Date: Mon, 05 Jan 2009 14:03:14 -0500
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>

Danny Richardson wrote:
> Tim Duffy K3LR wrote:
>   
>> I need to offer a ready made solution to a nearby "Ticking" electric fence
>> owner.
>>
>>  
>>
>> Does anyone have a manufacture/ model number for an electric fencer that is
>> RF spectrum (1.8 to 52 MHz) "Tic" free?
>>
>>  
>>
>> Happy New Year and 73!
>>
>> Tim K3LR
>>
>>   
>>     
> Electric-fence controllers are not always the source of noise. It is 
> very likely that electric-fence interference is caused by a
> problem on the fence wire itself.
>   

Many years ago I lived on the NW corner of the old family farm, near 
Breckenridge Michigan. It was a great location if you take into account 
the lack of trees as a natural antenna support. It was also very quiet 
or had very low QRN.  "However" my cousin's farm bordered ours a quarter 
mile to the South and they had about 120 head of dairy cattle. Their 
electric fence (a very potent one. The type that took care of weeds 
growing into it) formed a loop down a lane and also made circuits around 
at least three 20 to 40 acre fields and one of about 120 acres.  The 
lane was a half mile long and ran to that 120 acre field so overall 
there was probably about 2 miles of wire in that electric fence. .Along 
this lane were gates into a number of fields.  When opening a gate which 
was just a spring and hook on the end of the wire span across the 
opening it was not uncommon to slip and hook the wire to a grounded 
post. When this happened the normally quiet bands would disappear under 
a tremendous noise. However, a quick call would remedy that as it meant 
the fence was shorted and it's a lot easier to go find the short than to 
try and get a 120 cows back into confinement.<:-))  Unfortunately a 
windy day in late spring would get noisy as the wind would blow the new 
growth of weeds into the fence. Usually this didn't last long as the 
fence not only would burn the weeds off, it'd also kill them.  I just 
had to hope this didn't happen on a contest day.

Fortunately problems with the fence were few and relatively far between.
I don't remember the make, but it was called a "Weed Chopper" and you'd 
not want one of those close by.

73

Roger (K8RI)
> Here's a case history:
>
> www.arrl.org/tis/info/pdf/9604062.pdf
>
> 73
>
> Danny, K6MHE
>
>   
>>   
>>     
>
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