[TowerTalk] Coax Lengths for Stacked Yagis

Richard Smith n6kt1 at sbcglobal.net
Thu May 3 22:54:55 EDT 2018

Thanks to all who responded, some on the reflector and some direct. I was mixing up impedance matching with phasing. I was thinking about 1 trip around the Smith Chart repeating the impedance, but wasn't thinking correctly about phasing.
And thanks for explaining the benefit of using 1/4 wavelength lines.
73, Rich, N6KT

      From: Wes Stewart <wes_n7ws at triconet.org>
 To: towertalk at contesting.com 
 Sent: Thursday, May 3, 2018 7:29 PM
 Subject: Re: [TowerTalk] Coax Lengths for Stacked Yagis
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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