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Topband: Short receiving verticals question

To: topband <topband@contesting.com>
Subject: Topband: Short receiving verticals question
From: Jon Zaimes AA1K <jz73@verizon.net>
Date: Wed, 29 Jan 2014 21:25:55 -0500
List-post: <topband@contesting.com">mailto:topband@contesting.com>
Recent success here with 23-foot-high W8JI-style short receiving verticals in a 4-element broadside/endfire array using variable phasing has led me to make plans for other sets to cover additional directions.

To maximize distance from existing and potential noise sources, and to allow for tighter endfire spacing, I chose to make these independent arrays rather than the classic 8-circle array.

Since these will all be in a wooded area, I am considering using different elements without top loading wires, to avoid constant maintenance as falling tree limbs would break the wires.

I've read of the 36-foot-high base-loaded elements ON4UN described in his book, and understand these would have a slightly narrower bandwidth than an element with top-hat wires.

But what about an element loaded with a coil at the center or at the top? Would there be advantages to that approach that would come close to the short verticals with top-hat wires, or any serious disadvantages?

73/Jon
AA1K
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