[TowerTalk] Durability of Mastrant rope

[Edward Mccann]

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 at 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 at 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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