Thanks, Steve - after reading and absorbing comments here, I went out
and found a pulley with a 2 1/2 inch Delrin sheave, which has a 10MM
deep groove . I will string Mastrant rope through the pulley and use a
counterweight as suggested.
73, Pete N4ZR
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On 5/2/2019 1:32 PM, n6sj@earthlink.net wrote:
Pete,
My experience with that exact arrangement is that the wire through the pulley
finally frays, and it breaks.
Took about 2 years for my Inverted L to break. I had a pulley on a Douglas fir
limb up about 80 feet. I used 16 gauge THHN Home Depot wire, which may have
been a little too light. But with the limb swinging back and forth in the
winter storms, the friction shredded the wire.
I replaced it with an insulator on a rope through the pulley. The apex of the
Inverted L is on the bottom of the insulator. The rope I use is from HRO and
has held up over pulleys with counterweights for many years.
To maintain tension on the far end of the horizontal part of the L, I use
another pulley, rope, and counterweight on another tree.
73,
Steve
N6SJ
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of N4ZR
Sent: Tuesday, April 30, 2019 12:18 PM
To: TowerTalk <TowerTalk@contesting.com>
Subject: [TowerTalk] Pulley at the top corner of an inverted L
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.
I've just got a rope up 60 feet or so in a maple tree, and I'm ready to string
an inverted L.
My question - I have several stainless steel pulleys with about a 1"
sheave. If I insulate the pulley from the haul-up rope, is it a
good/bad/indifferent idea to string the inverted L wire (14 copper,
stranded) through the pulley rather than just using an insulator to make the
bend. It strikes me that having the bend move, however slightly, on the wire
is likely to be less destructive than just having a sharp bend moving through
an insulator end..
Comments?
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