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Re: [TowerTalk] multi-sheave pulley

To: towertalk@contesting.com
Subject: Re: [TowerTalk] multi-sheave pulley
From: K9MA <k9ma@sdellington.us>
Date: Thu, 14 Nov 2019 13:50:28 -0600
List-post: <mailto:towertalk@contesting.com>
I would want a fail-safe to cut the power, in case that Northern Tool switch shorts out.

When I first heard that W0AIH was riding a winch up towers, I almost had nightmares about what would happen if the winch wouldn't stop. Alas, that wasn't the cause of Paul's demise.

73,
Scott K9MA


On 11/14/2019 12:08, Patrick Greenlee wrote:
I bought a hand held (about the size/weight of a good skill saw) winch.  It runs on 120VAC and has 1000 lb pulling capacity.  Comes with hooks on both ends, one to hold the winch and one on the end of the 25 ft cable.  It has a trigger switch like a skill saw and will power in and power out. If you overload it the breaker pops up and you have to wait a tad for it to cool off then push the breaker button and go again.  I got mine at Northern Tool but they are available lots of places.


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On 11/14/2019 8:30 AM, Jim Thomson wrote:
Date: Wed, 13 Nov 2019 12:26:10 -0500
From: Dave Sublette <k4to.dave@gmail.com>
To: kj6y--- via TowerTalk <towertalk@contesting.com>
Subject: [TowerTalk] multi-sheave pulley


<The trouble is, at age 77 I no longer have the arm strength that I once
<had.  So,  I would like to use a multi-sheave system to reduce the force <necessary to lift it off and reinstall it.  I have a two pully system which <would reduce it to half, but I think I had better go with a three or four
<section system.

<All this to ask what is a good three or four sheave fully? It only need be
<a two inch diameter. Or, a one inch would work also.  If you have any
<knowledge which one and where to get it, it would be appreciated.  In the <meantime, I will do my own searching.  But, I thought it would be good to
<have the input of someone who has actually used what they recommend.

<As always, I look forward to the excellent advice that comes from this
<group.

<73,

<Dave, K4TO

### Use a ....cumalong.    Easy, and  much better  control  vs a lawn  tractor.

http://ds-studio.co/cumalong-tool/   ; The  1st  pix, is  the version  I have. It  has the  2nd  hook  option.....  so you   double  up  on  the cable....so  its  only  half as  long,  but  capacity  increases  from 1 ton  to  2  tons. You then  also get an  even  finer adjustment  for  a given  amount  of lever pull.   An 88  lb  rotor
would  be a piece of  cake.

##  I  use  a  multi  sheave /  rope  setup  to  get a yagi  to top  of  tower,  then  the  same cumalong  to do the  last few  inches.    Grnd  crew lifts yagi  up to  top  of  tower,  then  I hook the  cumalong  to a 2nd quick  rls  shackle.   Grnd  crew then  goes  home.   I  lift  yagi the  last little  bit....  then....using  my  hb  version  of the  infamous  F12..easy  on  mounting scheme,   mate  the  horz boom  plate  to the already installed vert mast  plate.

Jim  VE7RF
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--
Scott  K9MA

k9ma@sdellington.us

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