[TowerTalk] Old coax

VE1DT VE1DT at infinichron.com
Sun Jul 6 16:28:15 EDT 2008

This isn't totally based on actual experience per se, however I'd sure be
reluctant to chuck it without giving it a chance.

I'd try some simple tests. First peel back the sheathing and braid about a
foot. The dielectric ideally should look white. If it is a darker color, I'd
trim back a ways further. If it's still dark, I'd be a bit concerned.

Then you could put some connectors on it and hook it up between a
transmitter and dummy load. The VSWR should be 1:1. If not, there is
probably something wrong with the coax. Then measure the power going in and
out and compare the loss against Belden ratings. If everything looks OK,
then I'd say you are probably good to go.

If you had access to an oscilloscope, you could do even more testing such as
looking for odd reflections.

Gerald Boutin, VE1DT

To:  towertalk at contesting.com 
Subject:  [TowerTalk] Old coax 
From:  "Ken Anderson" <k6ta at volcano.net> 
Reply-to:  k6ta at volcano.net 
Date:  Sun, 6 Jul 2008 12:26:35 -0700 (PDT) 
List-post:  <towertalk at contesting.com">mailto:towertalk at contesting.com> 

I have a roll of RG214A/U that is approximately 25 years old.  Coax is
700-800 feet on its original spool and was residual from a commercial
installation.  The spool has been stored outside, out of rain and sun,
all these years.

There is no markings on coax other than RG info but I believe it was
manufactured by Belden.

What is peoples experience with the usability of such coax?

Ken, K6TA 

More information about the TowerTalk mailing list