Hi Steve,
How did you get ropes to support that wire up there? I'm guessing it
wasn't easy. Rather than a mechanical fuse, most of us use strain relief
in the form of a pulley and weight on one end. This also minimizes the
chance that a wire or rope migh break in the wind. Every situation is
different, of course. My high wires in trees are through a pulley on
both ends. At one end, the rope is tied off, on the other end there's a
weight. In my case, the weight is a water jug full of dry sand, about
90# (the wires are up 120 -140 ft, fed with RG-11).
73, Jim K9YC
On Fri,6/23/2017 12:38 PM, Steve65 wrote:
Hello all,
The south end of my 80-meter dipole runs among trees. The trees are
higher than the antenna wire and have limbs which are above the
dipole. Big limbs. The dipole is made of #14AWG THHN. It is supported
at its southern end with about 40ft of 3/16in rope tied off in a tree.
One of the trees that is near the antenna is a large beech. One of its
limbs broke off a few months ago and narrowly missed the antenna wire.
I'm thinking about installing a mechanical weak link in this leg of
the dipole that would break if one of the heavy limbs falls across the
antenna wire.
Good idea? Bad idea?
What material would be a good choice for the weak link?
Thanks.
Steve, K8JQ
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