The proposed antenna should work well, much better that the 43 footer with
no top loading. I would start with about 25 feet wire, but that's just a
guess. You can connect the end to your tower as you suggested, or run it
down toward the ground, it really doesn't matter. You should be able to
directly feed the vertical with a good SWR and you want a perfect match you
can add a hairpin coil at the vertical base and shorten the top wire a
little.
73,
John
To: towertalk@contesting.com
Subject: [TowerTalk] 80M Inverted L using 43 foot vertical ?
From: robertsmg@aol.com
Date: Fri, 09 Jan 2009 17:21:38 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Hello, All:
I've been thinking about ways to improve my signal on 80 meters from my .3
acre
suburban lot.? Have a SteppIR yagi with the 40/30 kit so those bands are
well
covered.? ? I'm contemplating using my existing 43 foot vertical as the
vertical portion of an inverted L for 80 meters, and then running a wire
over
to my tower for the horizontal component.?There is already a passable radial
system under the 43 footer.? The inspiration for this came from the ON4UN
chapter on Inverted L antennas, where there is a diagram of such an antenna
using a 1.6 inch diameter 39 foot vertical pole and a 40 foot 12 AWG
horizontal
wire.? Has anyone done anything similar using?one of the commercially
available
43 foot vertical models?? I don't have?experience with modeling software,
and
am wondering how long the wire should be for resonance around 3.600 MHz.?
What
would be the best method to feed it?? Any and all comments welcome.? 73 de
.?
Gavin W9EYE
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|