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Re: [TowerTalk] Choke on feed point of dipole

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Choke on feed point of dipole
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Wed, 14 Jan 2026 12:18:38 -0800
List-post: <mailto:towertalk@contesting.com>
Thanks Brian. Not surprised about very low antennas, but I view that condition as "the best that can be done" from a very limited QTH, and the effect on verticals in the same situation to be much greater.

73, Jim K9YC

On 1/14/2026 6:07 AM, Brian Beezley wrote:
"Horizontal antennas care NOTHING about soil quality but EVERYTHING about height."

I often use this notion myself, but it is a simplification. It is not true in general.

Some time ago I was surprised to see differences up to 1.5 dB (as I recall) at low angles for some horizontal antenna models as I varied ground constants. It surprised me because I had always thought such differences were on the order of tenths of a dB.


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