[TowerTalk] length of coax feedline

[Hanksm@aol.com]

Hello all you experts!!!   I have a question.  I am planning on changing my
antenna.  I will be using a Telrex 10 meter, 5 element beam on a 23 ft boom
and am going to mount it on a Rohn 58 ft foldover tower with about a 140 ft
run to the shack. 

I plan to use 9096 coax to feed the antenna.  I choose that antenna coax
since it is relatively low loss and I plan to use some on VHF and UHF on
different antennas and no antenna relay.

As my memory strikes me, the velocity factor enters into the equation of how
long I need to cut the feedline.  

Can someone advise me if I need to cut the coax to a particular length or
should I just cut it to whatever length I need?  How will the SWR
measurements be if i cut it either way?

Thank you & 73

Hank
KD4OL

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