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On Mon, 17 Aug 2009 18:48:43 GMT, Dennis Whatley wrote:
Just for my personal information, wondering if someone played with buried or submersed antennas and (especially from 40 meters going lower in frequency) get some interesting result. I once read an article in which it was stated that in a simple vertical, the element current it restricted by the ground current, and any attempt to increase the ground curent resulted in an increase in efficiency. The article went on to state that an antenna having maximum contact with the ground would be the most efficient, and in test a 1/2-wave dipole burried underground could have an efficiency approaching 98% that of a dummy load. The advantages are numerouse, such as the lack of an antenna support structure, but for VHF arrays there could be a huge problem with direction since the torque required to turn only a 2m 8-ele Yagi would be over a ton. I read that article, too. 'Twas in an April QST back some years ago. Jonesy -- Marvin L Jones | jonz | W3DHJ | linux 38.24N 104.55W | @ config.com | Jonesy | OS/2 * Killfiling google & XXXXbanter.com: jonz.net/ng.htm |
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