This is easy to model. I modeled and built one and used it in Grand
Cayman for a world high 40m score.
John KK9A ex ZF2JB
To: towertalk@contesting.com
Subject: [TowerTalk] 40 meter vertical beam
From: Tom Osborne <w7why@frontier.com>
Date: Mon, 7 Mar 2016 13:55:25 -0800
Hi All
I have a 40 meter vertical dipole that I would like to put a reflector
behind.
I was looking in a CQ Contest magazine at an article from N6BT of the Team
Vertical group. They put up verticals for their contest setup. One of the
antennas they used was a vertical beam on 40 with DE and Ref.
According to the modeling, he said the regular calculated dimension for the
reflector didn't work. It had to be a different length, but he didn't say
what it was. I can't find anything online about this antenna.
Does anyone know the formula for cutting the reflector length for the
vertical beam? The vertical dipole is in a tree with the bottom about 6
feet in the air.
Thanks and 73
Tom W7WHY
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