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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: Mon, 12 Jan 2026 13:30:57 -0800
List-post: <mailto:towertalk@contesting.com>
On 1/12/2026 12:20 PM, Richard (Rick) Karlquist wrote:
Could you explain what you are doing in detail.  I don't understand why
you need an inductor (choke) to feed the dipole.

To prevent the feedline from becoming part of the antenna.

As to what Tom's seeing -- depending on the geometry of the path of the feedline to the transmitter, it could be acting as a parasitic element to the antenna. When I first moved to W6 I hung high dipoles and a tee vertical for 160M. The coaxial feeds to the dipoles acted as parasitic elements to the 160M vertical, so I broke them up with a second choke down the feedline, acting as an "egg insulator."

73, Jim K9YC

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