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Re: [TowerTalk] 16om vertical and the number of radials

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 16om vertical and the number of radials
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Fri, 2 Dec 2022 10:29:19 -0800
List-post: <mailto:towertalk@contesting.com>
On 12/2/2022 8:22 AM, WESLEY ATTAWAY wrote:
I think you would have to look at the details re the really loud stations.  
They probably do have good radial systems and also have particularly good 
ground/water/soil for fairly long distances around the antenna.

YES! The earth is a big resistor. Soil quality affects transmitter field strength two ways. First, loss in the soil very close to the antenna make the antenna less efficient. Radials reduce this component. Second, loss in the far field, distant from the antenna. There's nothing we can do about this. There's an excellent discussion of this in one of the ARRL publications, either the Antenna Book or the ON4UN book.

73, Jim K9YC
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