I use 3/16" black Mastraint double braid rope for my wire antenna's and
have not had an issue. I also use large screw in eye bolts into the
trunk of trees (~12 inch dia) that support the end of the antenna's to
attached the rope too. I also support the center insulator off of my TV
tower using the rope and attach the feed line to the tower using nylon
UV resistant tie wraps. I leave a little slack in the antennas to allow
for wind. The antennas have been up for 3 years and have not had any
issues here in Northern Illinois.
YMMV
Chuck K9LC
On 4/19/2019 10:05 AM, Nidhog wrote:
For the rope over the tree, find a good, marine grade pulley of the correct size for
the rope. Rope on the end of the antenna goes through the pulley to a weight (Bucket
of rocks?). Tree moves, rope in tree doesn’t.
Sent from my iPad
On Apr 19, 2019, at 08:04, N4ZR <n4zr@comcast.net> wrote:
I have been using big box store "parachute cord" for antennas, but have found
it quite fragile in real life - for example, the center support of my Carolina Windom
came down within 2 weeks of my installing with with a tennis-ball launcher. It was held
up by a 70-foot pine tree, and my guess is that either the wind caused it to be
over-stressed or chafing against branches caused it to fail.
Has anyone had experience - good bad, or otherwise - with the Mastrant rope
sold by a number of ham radio suppliers? Any other suggestions for support
that may be more durable? I'm willing to go to bigger rope if that would help
- Mastrant quotes working strength of up to 900 pounds, but I don't know how
resistant their rope is to chafing.
--
73, Pete N4ZR
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