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Re: [TowerTalk] Optibeam Log Yagi

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Optibeam Log Yagi
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Tue, 30 Dec 2025 10:26:23 -0800
List-post: <mailto:towertalk@contesting.com>
On 12/30/2025 9:57 AM, Paul Christensen wrote:
Keep in mind that on any given band, the T12's gain is roughly equal to a 
two-element Yagi on a very short boom.  Boom length is what supplies Yagi gain.

There's been great advice already, including this. I'll add more. Buy and study N6BT's self-published "Array Of Light," which debunks a lot of the advertising gobbledygook about antennas. Tom is the designer of the excellent vintage Force 12 line of antennas. Great engineer and designer, great guy, not a great businessman, so that company is long gone. Someone will remind me of the company that has taken over his designs.

https://n6bt.com/on-line-check-out-cart

At home, in a dense redwood forest, it took me three years to find a spot to turn SteppIR's little 3-el with straight elements. It's been an excellent performer since 2008. Unfortunately, they have shut down their ham biz, but another company has been selling that sort of design for many years, and I see great reports.

Our contesting team has owned three of his smallest yagi, the C3SS, and used them extensively on our portable expeditions to light up rare counties in 7QP and CQP, and on Field Day.

73, Jim K9YC

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