To: <towertalk@contesting.com>
> Date: Sun, 03 May 1998 07:23:54 -0700
> At 11:21 PM -0700 5/2/98, Dan Baldwin wrote:
> Check out the Gap antennas as http://www.gapantenna.com/. They are treated
> as vertical dipoles and, as such, are billed as requiring no grounds.
Any antenna mounted anywhere near earth needs a good ground system
covering the lossy earth, no matter what claims are made, to reduce
losses. If you stick the high voltage end of an antenna near earth,
it generates a lot of loss.
I can't think of a single "no ground" antenna, including the Gap,
that isn't a notoriously poor performer. In a QST review of a
Gap, a small trap vertical with a modest ground blew it away. I had
the same experience here.
If the antenna is mounded far from earth it might be another story.
73, Tom W8JI
w8ji.tom@MCIONE.com
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