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Re: [TowerTalk] 80m DX special dipole

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 80m DX special dipole
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Thu, 13 Sep 2018 15:15:46 -0700
List-post: <mailto:towertalk@contesting.com>
It might be easier, but it isn't as good.  The problem is that antennas like that cannot be choked to kill RX noise. And most of us live where that matters.

73, Jim K9YC

On 9/13/2018 3:03 PM, Tom Osborne wrote:
Wouldn't it just be MUCH easier to put some ladder line on the antenna and
use a Matchbox to tune it??

That is what I do here. Using an old Johnson Matchbox and the antenna works
like gangbusters on  ALL bands.   73

Tom W7WHY

It should be possible to broadband your vertical using lumped element
circuits at the base.  You would need to model or measure the base
impedance vs frequency and then find the element values by trial and
error with a modeling program like SimSmith.  Somewhere in the past, QST
had an article about this in "technical correspondence" that related to
dipoles.  That would at least get you started.

Dan:  can AUTO-EZ do this optimization?

73
Rick N6RK
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