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Re: [TowerTalk] [CQ-Contest] 80m delta-Loop coax

To: towertalk@contesting.com
Subject: Re: [TowerTalk] [CQ-Contest] 80m delta-Loop coax
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Wed, 05 Dec 2012 11:06:36 -0800
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
On 12/5/2012 9:17 AM, Cqtestk4xs@aol.com wrote:
Although the numbers for coax are specified, I like to cut the stubs  a
couple of feet longer and then trim them down to the correct length using the
MFJ 259.

That's the only good way to do it. The velocity factor of coax varies with frequency (a percent or so lower at lower frequencies), and there are also manufacturing tolerances. Published Vf is for the higher frequency value.

73, Jim K9YC
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