Wouldn't the different electrical lengths indicate that the cable
manufacturing process is not consistent? Any spec on a cable has a
tolerance and though they may wander in performance, it could still meet
their specs.
Al
N6TA
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of R.Sigismonti
> Sent: Wednesday, July 13, 2005 8:28 PM
> To: <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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