[TowerTalk] Cushcraft R7000 and MFJ-1796, MFJ-1798 verticles

[Tom Rauch]

> 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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