[TowerTalk] Replacing coax question

[Alan C. Zack]

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 at 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 at chartermi.net>
> To: <towertalk at 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

-- 
__________________________________________________________________________ 

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
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