Re: [TowerTalk] Replacing coax question

["Tower (K8RI)" <tower@rogerhalstead.com>]

Why not use a single piece of LMR-400 flex? It'd have still less loss 
and I believe it's cheaper than 213.

As for splices, I use the flooded heat shrink and have not had any 
failures (leaks) so far.
OTOH at 40 meters the loss between old fashioned RG-8 and even Heliax is 
hardly worth mentioning./
/
Roger Halstead (K8RI ARRL Life Member)
Worlds Oldest Debonair (N833R S# CD-2)
www.rogerhalstead.com

Alan C. Zack wrote:

> I agree.  Please correct me if I am wrong but I believe RG-213 is 
> flexible enough to use for the rotation loop at the beam as well as 
> where it would loop on the side of the tower when you crank it up or 
> down.  You could have one continuos coax run and not have the concern 
> of moisture getting into your splice points.
>
> kk9a@arrl.net wrote:
>
> > I would use a single piece of Belden 8267 RG-213 for this.  It's 
> > durable,
> > there would be fewer connections and it would have less that 0.5 dB 
> > loss.
> >
> >
> > ----- Original Message -----
> > From: "Tom Martin" <tmartin@chartermi.net>
> > To: <towertalk@contesting.com>
> > Sent: Monday, October 11, 2004 18:36
> > Subject: [TowerTalk] Replacing coax question
> >
> >
> > 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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