Topband: 1/2 wave inv L

[Charles Moizeau]

Well it is understandable.  The current maximum in the half-wave antenna is lifted well above ground level.  Had there been a radial system it would have had to employ very long radials, for most of the vertical's radiation would have been hitting the ground at points far away from the base of the vertical.  It is only at those distant points that very long radial wires would be able to gather the radiation from the ground's surface and feed it back to the feedpoint.


Charles, W2SH


________________________________
From: Topband <topband-bounces at contesting.com> on behalf of Mike Waters <mikewate at gmail.com>
Sent: Sunday, February 18, 2018 6:31 PM
To: Roger Kennedy
Cc: topband at contesting.com
Subject: Re: Topband: 1/2 wave inv L

Yup! The lack of a radial system explains why the 1/2w vertical worked
better. :-)

73, Mike
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On Feb 18, 2018 4:55 PM, "Roger Kennedy" <roger at wessexproductions.co.uk>
wrote:


Many years ago, a friend of mine used to operate on 160m with vertical
antennas suspended on a big Weather Balloon filled with hydrogen . . .

After using Quarter-wave verticals for a few months, he changed over to
Half-wave verticals . . . he found they worked much better !

He didn't have much of a radial system (due to lack of space), mainly just
earth rods at the base . . . so I suspect that's one of the reasons why.

Roger G3YRO
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