[TowerTalk] Replacing coax question

[Tom Martin]

I have decided to run the LMR from the beam directly to the relay box at the bottom of the tower.  The LMR is flexible enough for a large loop.  It might get a little stiff this winter when the temps get to minus 20!

W8JWN

"Alan C. Zack" wrote:

> I think I'd be more worried about moisture getting into the PL-259 /
> barrel connection splice hanging out in the open than insertion loss.
>
> Tom Martin wrote:
>
> > I am replacing a 90' length of RG8 water damaged coax to my 40 meter beam.  I have LMR 400 for the main run up the tower but want to use a RG8 section for the rotator loop.  There are two ways to do this. First, a 14' section of RG8 from the feed point of the beam with one PL259 and one barrel connector to join the LMR.  Secondly, a 10' section of LMR and PL259 to a barrel connector and a 4' section of RG8 for the loop to join the LMR that goes down 80' to the antenna relay box at the base of the tower.  This configuration would require 4 PL259's and two barrel connectors.  I want to avoid the many possible problem areas with the multiple connections.  I think that I have answered my own question but wasn't sure if adding that much RG8 to the run would offset the benefit of the LMR 400.  I suppose on 40 meters the loss would be negligible.  Am I correct?
> >
> > 73,
> >
> > Tom W8JWN
> >
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> Alan Zack
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