I would not use the stretch factor of Phillystran as an argument to not use
it. The amount of stretch in an amateur installation is negligible.
If you are going to keep using steel and plan for multiple Yagis on the
tower, be sure to break the steel into non-resonant lengths.
73, Keith NM5G
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of StellarCAT
Sent: Wednesday, September 21, 2005 11:17 AM
To: tower
Subject: [TowerTalk] replacement guys (was ...and C31XR)
I see phillystrand is still being hawked as the best overall solution for
guying where antennas will be along the length of the tower... but I still
prefer good old fashioned steel.
The reasons - much less stretch (see K7NV's very nice analysis of same using
both EHS and philly - no comparison!), no UV concerns (long term philly use
is still not available in great even numbers), cost, and overall strength.
As for interaction - there is a treatise on the net by a gentlemen that I
have forgotten his name - very well done overall on tower installations...
he said in essence: for a dipole to add gain one has to CAREFULLY place
another length of conducting material in the plane, at the right distance,
and have the right length to JUST have a little gain... the guy wires are
not in the plane in most cases, can be cut to be non-resonant, and for the
most part are a long distance away.
I will stick with steel!
g.
_______________________________________________
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.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
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.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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