On Tue,9/2/2014 7:47 AM, Carl wrote:
Im going to be needing 500-1000' spools of polyester double braid rope
for supporting some more wire antennas in the harsh enviroment up
here. The 5/16" is rated at 3400 tensile and the wire will be about
50#. ID likely tension it to about 200-250# to reduce sag
Hi Carl,
I'm supporting high dipoles fed by RG11 up 120 ft with the 5/16-in stuff
that DX Eng sells. They are run though top-grade pulleys, tied down at
the base of one tree, 100# of dry sand at the base of the other tree.
The major issue with the rope is wear -- the pulleys must be first grade
to avoid abrasion, which WILL eventually break the rope.
My longest span is about 250 ft. Something like four years ago, I bought
a 500 ft spool of 7/16-in and had the climbers put it on one end. Never
got around to doing the other end. They climb every 4-5 years, and each
time I have them examine the ropes. So far, no reports of wear.
73, Jim K9YC
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|