100 feet is fine for 20m and possibly 15m, but probably too high for 10m,
especially during high sunspot conditions. Unfortunately you never know at
what radiation angle signals arrive will arrive and with higher antennas you
can have some big nulls at possible angles. So if you're going to have a
high antenna, you should have a lower one to fill in the nulls.
John KK9A
To: <towertalk@contesting.com>
Subject: [TowerTalk] Optimium Tower Height
From: "Mark Robinson" <markrob@mindspring.com>
Date: Wed, 19 May 2010 19:59:07 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I have started my Rohn 45 tower projhect. I am planning to put a Cushcraft
A3WS and a TH7DX atop this tower. I was planning on erecting a 100 foot
tower but a fellow ham suggested that that might be too high. What in the
groups informed opinion would be an ideal height for these antennas?
I appreciate your input
73 Mark N1UK
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