Pete,
I have been using Synthetic Textiles dacron rope to support my 80m
verticles and ends of other misc antennas for over 30 years. It does
stretch some but for my uses, I just pull the slack out occassionally. It
does have a UV covering.
What I don't know is how it would wear rubbing against a tree, but would
guess not so well. For a straight pull even going through a pulley it works
fine.
I just bought some Mastron rope to try out. I want to use it to build boom
or element struts and stretch is a major consern. Currently, I use wire
rope or phillystran for struts but will try Mastrant to see how it does.
73,
Ray,
N6VR
On Fri, Apr 19, 2019, 8:30 AM Edward Mccann via TowerTalk <
towertalk@contesting.com> wrote:
> But for the real solution, buy a bike lock from Home Depot for $15, one
> that has a stainless cable covered in thick see-thru poly, with swaged
> fittings (that the lock goes thru), choose a desired height, attach two
> ends of your line to the fittings, attach a marine grade pulley at the top
> fitting, and pull the assembly so the poly covered section rests on the
> limb. This is the halyard that pulls up the pulley, through witch you
> thread the line from the insulator, through the pulley, down to your window
> sash weights, or sandbag, or whatever you use as the vertical stabilizer.
> Tree moves, weights move, tree limb happy and does not grow through line or
> chafe itself to destruction.
>
> Up on the air for thirty years.
>
> Ed McCann
> AG6CX
>
> Sent from my iPhone
>
> > On Apr 19, 2019, at 8:05 AM, Nidhog <robrk@nidhog.net> 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
> >> Check out the Reverse Beacon Network
> >> at <http://reversebeacon.net>, now
> >> spotting RTTY activity worldwide.
> >> For spots, please use your favorite
> >> "retail" DX cluster.
> >>
> >> _______________________________________________
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