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
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> > Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
> > questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
> >
>
> --
> __________________________________________________________________________
>
> Alan Zack
> Amateur Radio Station K7ACZ
> Las Vegas, Nevada, USA
> Quality Engineer, The Boeing Company, Retired
> Aviation Chief Warrant Officer, U.S. Coast Guard, Retired
> U.S. Coast Guard, Always Ready, Always There
> Every hour, Every day, Around the Clock and Around the World
> SEMPER PARATUS
> http://gocoastguard.com
> DEPARTMENT OF HOMELAND SECURITY
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|