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Re: [TowerTalk] Vertical dipole other choices?

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Vertical dipole other choices?
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Thu, 22 Oct 2020 11:54:54 -0700
List-post: <mailto:towertalk@contesting.com>
On 10/22/2020 9:39 AM, john@kk9a.com wrote:
A vertical does not really have a low radiation angle unless it is over a perfect ground.  Assuming that your vertical dipole base is near the ground I would expect the 115 ft high dipole blow it away the in the favored direction.

This is only true in the extreme case when "ground" is salt water. What better ground quality does is strengthen the vertical pattern. Mounting height affects both the shape and the strength of the vertical pattern, and a vertical that's high over salt water has very strong lobes. I posted links yesterday for a study I did several years ago on the topic. k9yc.com

73, Jim K9YC




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