|04-27-2010, 12:02 AM||#1 (permalink)|
Join Date: Apr 2010
field expedient antennas
I'm a comm op on a TAD to yuma az. I have become fairly familiar with FEAs but yuma is giving me troubles. I have all the materials, the formulas, etc. But I need an antenna that will work anywhere from 10 to 100 miles in a desert terrain plus mountains. We will have marines at different locations but directional would be fine if it can be somewhat easily changed.
Right now we have an inverted v at a quarter wave per element. Longer than that is not possible with our ceoi and location. We have sent teams out with comm successfully to two different locations. The third one has failed. The distance is les and there is no mountain interference when there was before yet it worked. We are doing NVIS so ground obstacles should not be a problem.
Anyway, I'm looking for some antenna help. If anyone has a nvis antenna that has worked at 10 to 100 miles I would love to hear what they did.
Just incase I missed anything, we are doing HF with an AN/PRC 150 non power amped, so that gives me 22 watts of power via house power. Antenna elements are made of copper with the center 8ft above the ends of the elements. Each element is a qtr wave length.
I appreciate any help
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