I would be cautious using HFTA for calculating optimum stacking distances.
FWIW, I have rarely if ever have found a single antenna to be better than
my stacks. I would optimize the spacing using all three antennas.
John KK9A
To: Towertalk <towertalk@contesting.com>
Subject: [TowerTalk] Triband Stacking Distance or antenna height?
From: Richard Thorne <rthorne@rthorne.net>
Date: Mon, 23 Feb 2015 13:43:21 -0600
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
I've been following the mail on this subject.
I'm going to start my new tower this summer. The base and anchors are
already in. It's going to be a 137' rotating 55g tower with three F12
C31XR's stacked.
I've been using HFTA to come up with the best compromise heights
(compromise as I'm trying to get the best results on all 3 bands).
Then it dawned on me. Should I be worried about stacking results or
individual heights. Isn't the height of an antenna for a specific band at
a certain time of day more of an advantage than the combined stacking?,
and of course it's still a compromise since we're talking about
tribanders. Don't get me wrong, I'm still going to try to come up with the
best stacking distances for my location, but it seems to me that the most
important feature of a stack is having 3 different heights to choose from,
isn't it?
I sure wish the project was finished, it would have come in handy this
past weekend.
Rich - N5ZC
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