To: | "Guy Olinger, K2AV" <olinger@bellsouth.net>,"Jim Brown" <jim@audiosystemsgroup.com>, <topband@contesting.com> |
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Subject: | Re: Topband: A question on L's |
From: | "William Culpepper" <culpepper@earthlink.net> |
Reply-to: | William Culpepper <culpepper@earthlink.net> |
Date: | Mon, 19 Nov 2007 13:18:47 -0500 |
List-post: | <mailto:topband@contesting.com> |
If you had a 1.8 mHz vertical antenna with a ground plane consisting of a quarter wavelength of copper sheet around the base, the loss would probably approximate the loss in one half of a half wavelength dipole. However, with 120 quarter wavelength radial wires, all of the return current is NOT collected by the wires. Some small amount of current flows through the earth to the wires, and that current flowing through the high resistance dirt encounters R loss which lowers the Q as compared to half of the dipole. Just my opinion. No NEC model. William W4BZ _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband |
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