The VF of BuryFlex is published as 0.82. I think standard RG213 has a
lower VF.
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of R.Sigismonti
Sent: Wednesday, July 13, 2005 10:28 PM
To: towertalk@contesting.com; towertalk@contesting.com;
towertalk@contesting.com
Subject: [TowerTalk] Matched "Bury Flex" cables
I recently purchased a 1000 ft roll of Davis BuryFlex cable, planning
on using it to replace old RG-213 cables on my 15M and 20M 3-stacks. I
pruned one length of cable for an odd multiple of quarter waves at
21150 kHz and then proceeded to cut two others to the exact length of
the first cable. Much to my surprise, when I checked the electrical
length of the other two cables, I found them resonant well below the
15M band. I had to remove 4-5 feet of cable from each run (approx
142ft) to get them to resonate. Has anyone run into a similar
experience, where the apparent velocity factor of the cable varied in a
single run? I haven't checked the 20M lines, which I made in a similar
fashion, but hope to be lucky with them.
Sig
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_______________________________________________
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.
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