I have modeled this too on my old K6sti software ... need to get a windows
replacement. Make that a horizontal 20 DEZ (86') and not only is that
antenna lots of fun on 20 but it is lots of fun on 10 with a very nice
cloverleaf pattern (can't remember the gain).
--------------------------------------------------
From: "Ron D'Eau Claire" <[email protected]>
Sent: Tuesday, September 03, 2013 5:28 PM
To: "'Reflector Elecraft'" <[email protected]>
Subject: Re: [Elecraft] 43 Ft Vertical and Elecraft Tuners
An interesting point I noticed modeling a 43 foot vertical was that, while
on 10 meters the main lobe is up around 50 degrees, the "gain" at low
angles
is similar to a 1/4 wave "ground plane" antenna cut for 10 meters. That's
because the longer antenna has significant gain over a 1/4 wave antenna so
the amount of radiation down at the lower angles is about the same as a
1/4
wave.
That's for a ground mounted 1/4 wave on 10 meters. Ideally you want to
raise
the 10 meter vertical at least 1/2 wavelength - roughly 16 feet - then you
get much better low angle radiation from the 1/4 wave because the ground
absorbs much less of the lowest angle radiation. Installed that way, the
1/4
wave shines over the 43 footer. Also, of course, there is less
interference
with the signal by foliage, buildings, etc.
That's why so-called "vertical ground plane" antennas are so popular on
the
higher HF bands.
73, Ron AC7AC
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