I have used Dacron with good results, but not in a pulley arrangement.
Lately I have changed over to trot line, a tarred nylon twine. The local
sporting goods store carries several sizes up to 440 lb breaking strength.
I use the 440 lb to suspend wire antennas. It will likely work well in a
pulley. Here is a photo of a roll:
http://www.dutson.net/Transfer/HamRadio/IMG_0664ds.JPG
73, Keith NM5G
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Jim Brown
Sent: Wednesday, May 31, 2006 5:29 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Phillystran for Wire Dipoles in Trees?
We've had several threads on this topic, and none of the options seemed
ideal or conclusively good. I've moved to a new QTH, with lots of 100 ft
tall redwoods. I need to hang long dipoles with heavy wire and heavy
feedlines (I want to run high power). When I find someone to climb, I'll
have them put good quality pulleys in the trees and rig some lines into
them. Short term, I'm throwing ropes over branches.
I've had bad experience with the 5/16" Dacron sold by Davis RF/Radio
Bookstore, which says it is made by Synthetic Textiles. This seems to be the
same stuff that DX Engineering sells. The failure mode I've seen is wear at
the pulley. One of my friends suggested Phillystran as a better alternative.
Does anyone have any thoughts or experience on this topic?
I'll probably have to pay a good buck for the climber, so paying a bit more
for rope that doesn't need to be replaced in a few years is a no-brainer.
Are there any other good alternatives? Are any of the sailing lines worth
the added cost? How about polyester?
Jim Brown K9YC
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