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Re: [TowerTalk] Good vacation antenna

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Good vacation antenna
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Thu, 3 Jul 2025 20:36:37 -0700
List-post: <mailto:towertalk@contesting.com>
On 7/3/2025 2:11 PM, Wes Stewart via TowerTalk wrote:
So you move the loading coil from the base of the antenna to inside the tuner in the 
radio (with some coax in between).  How does that affect the radiation 
efficiency/?

The "tuner" is really a matching network that maximizes the power that the output stage can get into the transmission line. Current distribution in the antenna is determined by the boundary conditions -- that is, gotta be near zero at the ends of the intentional radiator and the counterpoise.

73, Jim K9YC

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