My EZNEC modeling of various 80m horiz wire dipoles at low heights (say 50')
shows that the ends can be snaked around just about anywhere without hardly
effecting the patterns. Apex at 50' puts the antenna
right in the NVIS range. Consider a "full length" dipole pruned to give you
resonance on your favorite
frequency (unless your using a tuner). In that case there is no need for
the extra snaked around length.
I often am asked it they (hams) would benefit much by raising low 80m wire
dipoles a few feet or adding a leg off the main run will help. Invariable
the answer is no!
k7puc
----- Original Message -----
From: "Tom Anderson" <ww5l@gte.net>
To: <TowerTalk@contesting.com>
Sent: Saturday, August 18, 2001 8:10 AM
Subject: [TowerTalk] Shortened 80m dipole/inverted vee
>
>
>
> After taking a lightnming hit I'm redoing the antenna configuration on my
crank
> up tower. One question is does anyone know how efficient a shortened 80
meter
> dipole/inverted vee (80 ft) is versus the advertised "full size" 80m
dipoles of
> 130 ft or so? The highest I can get the apex of the dipole/inverted vee
is 50
> ft. (I have a TriEx WT51 with a Mosley Classic 33 WARC (the the 40m kit on
the
> driven element) on top. The reason for investigating the shortened
dipole/vee is
> my lot is just 100X150 Any help appreciated, or would I be doing better
by
> putting up a vertical?
>
> Tom, WW5L
> Colleyville, Texas
>
>
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>
> -----
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>
>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
Trylon Titan towers, coax, hardline and more. Also check out our self
supporting towers up to 96 feet for under $1500!! http://www.anwireless.com
-----
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
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