Grant, thanks for your input. I agree that cattle would not be Beverage
friendly. I had some stock get next to the house once and they ate the
coax that was running from the satellite dish to the house. It was
jammed between brick wainscot and vinyl siding but they pulled it out,
pulled it down, and chewed it up. Another time they got to my remote WX
station and ate the cables running from the anemometer to the main
enclosure/sensor suite.
I'm interested in your modeling results re the 10 ft elevated Beverage
but I don't understand your description regarding "insulated every 200
ft." I would appreciate it if you could give me some more detail, maybe
via PM if you think this is not of general interest.
Meanwhile I will read about 4 sq and DHDL.
Thanks,
Patrick NJ5G
On 2/10/2016 7:06 PM, Grant Saviers wrote:
Having tried a Beverage over a barb wire fence, it had poor
performance. A Beverage needs a significantly lower conductivity
ground underneath to develop the signal and barb wire is not that. Now
that I know better, I built an EZNEC model of a 10' high 600'
Beverage over 3 barb wire strands 2', 3,' & 4' high, each insulated
every 200', and the model yielded an RDF of 11db at 1.8MHz. I had
600' of not insulated barb wire off both ends that didn't have a
noticeable effect. That RDF sounds a bit too good, but shows it might
work ok. It also appears picking 200' sections for the model was
fortuitous so perhaps the idea can be further optimized. Not that it
matters much for me as I sold my ranch last fall.
Since cows are not Beverage friendly, you might try one of the various
phased vertical receive antennas that fit in much smaller spaces. I've
used the DX Eng 4 sq and the DHDL and had good results.
Grant KZ1W
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