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Re: [TowerTalk] Coax Lengths for Stacked Yagis

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Coax Lengths for Stacked Yagis
From: Wes Stewart <wes_n7ws@triconet.org>
Date: Thu, 3 May 2018 21:06:26 -0700
List-post: <mailto:towertalk@contesting.com>
Another point or two and then I'll shut up.

1)  The expected phase shift in a line is only achieved when the line is 
matched.

2)  When I was doing EME I, and everyone else I knew of, used equal length lines everywhere and maintained symmetry, even if it meant some lines had more loss than necessary.


On 5/3/2018 7:28 PM, Wes Stewart wrote:
Quarter wavelength lines have the magical property that the output current is equal to the input voltage divided by the line Zo.  So with multiple inputs tied together, and obviously having the same voltage, the output currents will be equal.

Wes  N7WS

On 5/3/2018 6:09 PM, Richard Smith wrote:
What is the benefit of making the feedlines odd multiples of a quarter wavelength long?  I have heard this elsewhere, but have not yet figured out the benefit.

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