[SBE] FW: Block and tackle question

[Richard Hardy]

Huh?  Heliax is rated to support its own weight during installation for
up to 200 feet maximum between hoisting grips.  With a 120 foot vertical
run it appears only one hoisting grip would be required near the top of
the run. Richard

  ----- Original Message -----
  From: "Glenn Little WB4UIV"
  To: "sbe member discussion mail list"
  Subject: Re: [SBE] FW: Block and tackle question
  Date: Fri, 08 Aug 2008 09:37:25 -0400


  The hard line must be supported along its length during the pull
  and until it is securely attached to the tower. To do otherwise
  will do damage to the feedline. The feed line is not designed to
  support its own weight for extended runs.

  73
  Glenn
  WB4UIV
  Chief Engineer
  WCIV TV

  At 08:28 AM 8/8/2008, you wrote:
  > -----Original Message-----
  > From: Bill Whitt [mailto:billw at betterlifetv.tv]
  > Sent: Thursday, August 07, 2008 3:46 PM
  > To: sberoundtable at sbe.org
  > Subject: Block and tackle question
  >
  >
  >
  > Hello all,
  >
  > I have to do a new transmitter install on a 150 foot tower. I'm
  > pulling 1 5/8 cable up the stick to about the 120 foot mark. I got
  to
  > looking at our block and tackle gear, and I don't think this stuff
  will
  > handle the weight of cable at that height. I was doing some
  thinking off the
  > top of my head, and near as I can figure a 100 pound antenna being
  hoisted
  > at that height would be about 580 or so pulling pounds. Any
  suggestions on
  > sourcing new gear. I really want a smooth install. A winch may do
  the trick,
  > but I can muster up a ground crew too with no issues - meaning that
  if a 4:1
  > pulley network is your favorite I would look at that suggestion as
  well.
  > Any suggestions on sources and gear I would appreciate.
  >
  >
  >
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