I'm using the same antennas, with the A3WS 8 feet above the TH7DX. The TH7
is at 72 feet and performs well. I can usually always work what I hear.
Don W7WLL
----- Original Message -----
From: <Cqtestk4xs@aol.com>
To: <TOWERTALK@contesting.com>
Sent: Wednesday, May 19, 2010 8:09 PM
Subject: Re: [TowerTalk] Optimium Tower Height
In a message dated 5/20/2010 2:50:27 AM Greenwich Standard Time,
w0mu@w0mu.com writes:
Maybe K4XS will chime in but we were having a discussion on this subject
and
I think 70 ft might be a better height. If you had a 40m beam in the mix
then you might want the extra height.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
OK, my 2 cents worth.
First, are you on flat ground. If not, all bets are off on predicting the
optimal heights. You'll need to do terrain analysis for the tricky terrain
stuff and check what the arrival angles are for the areas you want to
cover.
Second, who do want to contact. Do you mostly work DX or North America?
Third, what are your favorite bands? Totally different requirements for
different bands.
Fourth, what's the QTH?
I would say that 70 feet would be optimum height for day to day operation
on 40 through 10. Higher would be better if you spend a lot of time on 40
and 20. However, you will struggle somewhat when 15 and 10 come back (we
hope). It provides a full wavelength of 20 in height and half a wavelength
for 40.
Back in FL I had lots of choices for antennas, and one of them was a
KT34XA at 65 feet. It was a solid antenna for S/P and gave me lots of QSOs
in
runs.
I agree with W0MU on his recommendation.
Bill KH7XS
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