Gary,
I have an inverted L similar to this setup and it does a decent job on 160
through 20 meters.
I put up an inverted L supported in trees because it fit he backyard layout. It
is 5/16 long with a 50-55 foot vertical component.
I have 30 radials 70 feet long and 4 130 foot radials because this is what it
into the yard.
I only run 100 watts and use an MFJ-929 autotuner.
I first started out with a 160 meter dipole at 50 feet and this inverted L
performs much better.
I use one set of halyards for the supports over the trees and a second set of
pulleys to support the L. The L support lines have wood stump counterweights
to allow for sway. I can easily lower the inverted L to prepare for a major
storm.
Good luck with the installation.
Mike N2MS
----- Original Message -----
From: NC3Z Gary <nc3z@outlook.com>
To: topband@contesting.com
Sent: Mon, 07 Mar 2016 13:50:29 -0000 (UTC)
Subject: Topband: Low band antenna project questions
OK, still working on my permanent low band antenna and what I can fit
for an effective antenna. The space I have is a recently cleared forest
area. I had originally considered a full size loop but the best I could
do is 50' high, although that would be a bit higher than my temporary
dipole it is not much in the scheme of things. And I keep getting talked
out of it.
I have walked the back many times with the tape measure and lines to see
what I can fit, and what I can fit is a catenary line to support a T or
L at 50' above ground. And after reading numerous articles the consensus
was not to use radials much longer than the vertical height. I can
easily fit 32 radials @ up to 75' each.
Now I want to be able to use this antenna for 80M as well as the non-DX
portion of 160M. I can house a autotuner at the base (or make my own
network but that would require control lines). My thinking is to make
the 160M a 5/16 WL vs 1/4 to be more beneficial to 80M tuning without
loosing anything on 160M.
With the above limitations is this an effective solution?
T or L ?
Am I missing anything?
Working on a RX antenna later.
--
Gary Mitchelson
NC3Z/4 Pamlico County, NC FM15
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