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@aol.com" <Cqtestk4xs@aol.com>
Subject: Re: [TowerTalk] Site Elevation and TOA
From: Jorge Diez CX6VM <cx6vm.jorge@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
put
them at 69/138 ft
HFTA show that this is not the best height and they must be not to high,
59/118
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
work,
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 :-(
73,
Jorge
CX6VM/CW5W
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