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Re: [TowerTalk] Radial question

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Radial question
From: jimlux <jimlux@earthlink.net>
Date: Mon, 29 Feb 2016 14:29:46 -0800
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 2/29/16 10:58 AM, Doug Turnbull wrote:
Dear OMs and YLs,

Yes all this is true but do not forget the actual radial length will be
shorter than 0.4 Wavelength when on the ground.   It may be electrically 0.4
wavelength but physically it is considerable shorter as the ground changes
the velocity factor.

I think the issue with radials on or in the ground is more a matter of 
"improving the conductivity" in the near field and it's more related to 
the physical height of the vertical radiator, than any sort of fraction 
of a wavelength effect.

So, if you had a 5-10 meter tall radiator, being used on 80m or 160m, there's not a lot to be gained by going longer than 15-20 meters for the radials.



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