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Re: [TowerTalk] Helically wound verticals

To: <ersmar@comcast.net>, "Tom Osborne" <w7why@verizon.net>,"Towertalk" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Helically wound verticals
From: "Kelly Taylor" <ve4xt@mts.net>
Date: Sun, 4 Jun 2006 19:23:49 -0500
List-post: <mailto:towertalk@contesting.com>
> 2.  A short, loaded vertical will not be as efficient and effective as a
full-size 1/4WL radiator.

Jerry Sevick may wish to disagree...

Actually, he showed in the 1960s that short, loaded verticals are so close
in efficiency to full 1/4-wl verticals as to be imperceptible. He built a
six-foot 40-meter vertical that performed so closely to his full-size he
didn't think the full size was worth the effort. (And this was waaaay before
NEC modelling was even a gleam in a computer geek's eye.)

Of course, Sevick put his verticals over the classic 120-radial ground
screen...

Verticals can be very good antennas: they just need lots of ground screen,
or be oriented as vertical dipoles. Of course, the better a vertical gets,
the worse it gets for Field Day...

73, kelly
ve4xt
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