[TowerTalk] Site Elevation and TOA

john at kk9a.com john at kk9a.com
Wed Jun 18 12:35:01 EDT 2014

69 feet and 138 feet are usually very good heights for 20m. I use similar
stacking heights and I have numerious 20m contest plaques. I have never
used HFTA, does it model stacks properly?

A 200' high 10m beam can be a very good antenna however there are many
nulls so there will be times that is a poor antennas.  This should not be
your only 10m beam.

John KK9A

To:	 "Cqtestk4xs at aol.com" <Cqtestk4xs at aol.com>
Subject:	 Re: [TowerTalk] Site Elevation and TOA
From:	 Jorge Diez CX6VM <cx6vm.jorge at gmail.com>
Date:	 Wed, 18 Jun 2014 10:45:06 -0300

Really is nice to see HFTA suggestions

For a project to put two 20M5 in a stack, I was told by several friends to
them at 69/138 ft

HFTA show that this is not the best height and they must be not to high,
seems to be better

Anyway the practice show me that high antennas are good:-)

Most of the people told me that a 10 mts antenna at 200 ft hight will not
but really this antenna pay off all the work

So now, about the 20 mts stack project, I am in doubt if I need a 118 or
138 ft
tower, not sure what to do :-(


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