[TowerTalk] RFI Identification

[Roger (K8RI)]

We had one of those that ran about a 1/4 mile from my house at the closest. 
That fence was between 2 and 3 miles long.  After I was able to demonstrate 
they had a short when I could hear it they were real quick about fixing it 
as a shorted fence didn't keep any cows in. They had over 200 milk cows and 
only had a major break twice that I remember.

There's a pig farm about 1/2 to 3/4 of a mile to the ESE of us here.  I 
rarely hear their fence.


> Tony,
> Sounds like an electric fence with a leakage or discharge path.
> Any farms in the vicinity?  How about someone with an electric fence
> to control predators?
> We have one here and it make the exact sound you describe when one of
> the insulators on a fence post leaks.

The old "weed choppers" were real noise generators.  Hurt too. <:-))  When 
the weeds would grow up against the fence there was enough power in there to 
kill the weeds.  A good wind after a week or two of calm summer weather 
would really make some noise.  The weeds along the fence would have grown up 
quite a bit above the fence and the wind would then blow them against it.

Roger (K8RI)
> Good hunting.
> Don
> N8DE
>
> Quoting Tony <dxdx at optonline.net>:
>
>> All,
>>
>> I have an RFI problem that I'm trying to identify. It's a continuous
>> pulse noise that pops on every 1/2 second. The actual timing between
>> each pulse is about 0.533 seconds and doesn't seem to change.
>>
>> It's spread accross all HF bands and on some days, it creeps up into the
>> 100MHz range. It's stronger on the lower bands (80 meters) than on the
>> upper HF frequencies.
>>
>> The signal is directional and can be nulled completely when not beaming
>> in the direction of the source. The interference came on suddenly in
>> December.
>>
>> I have a few recordings and would appreciate any suggestions. Apologies
>> for the off-topic subject -- please reply direct.
>>
>> Tony -K2MO
>>
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