I put up most antennas for 25 years using a single wire tram with the
pulleys, etc. but lately, when there is tree clearance have chosen to just
pull the antenna straight up the tower in the horizontal position, removing
and re-attaching guy wires as I get to them. This simple method has worked
quite well especially for some very heavy antennas - 200 lbs +. If you have
three people with come-alongs and cable grippers, it goes up very quickly
with a vehicle doing the lifting. My son and I put up a 7L56' yagi at 90
feet in about two hours total time this way. Just another obvious
alternative that I have chosen to use.
Ok, enough thinking about antennas and back to selling parking equipment...
Stan, K5GO
----- Original Message -----
From: <K7LXC@aol.com>
To: <gjerning@flash.net>; <towertalk@contesting.com>
Sent: Friday, December 19, 2003 10:42 AM
Subject: Re: [TowerTalk] Tram - Clarification
> In a message dated 12/18/03 8:45:28 PM Pacific Standard Time,
> gjerning@flash.net writes:
>
> > Nice pictures of a 2 wire tram system.
>
> A two-wire system where the load is slid up while sitting on top of
them
> should more properly be called a trolley system; i.e. a trolley car that
sits
> on top of two tracks.
>
> > I used a single wire tram which is easier to rig.
>
> This is a more useful antenna raising system where the load is
suspended
> below the single tramline. The haul line from the ground goes through a
> snatchblock (a pulley that opens on one side to accept a rope) at the
bottom of the
> tower so that the groundcrew can stand away from the tower and pull
> horizontally while watching the load. The rope goes up to another pulley
at the top of
> the tower and then down to the ground where it attaches to the load.
Another
> pulley is attached to the tramline, load, and haul rope. When you've got
> sufficient tension on the tramline, then the groundcrew can start pulling
the haul
> line and raising the antenna.
>
> There are a number of tricky issues that you sort of have to address
by
> trial and error; i.e. rigging the antenna, using as compact of a knot and
> rigging as possible, where to attach the pulley to the mast, how much
tension to
> use, etc. It's one of those things that takes 2 hours to rig and then 10
minutes
> to do the job. I use it about 90% of the time when installing antennas
> manually.
>
> Cheers,
> Steve K7LXC
> TOWER TECH -
> Professional tower services for commercial and amateur
> 888-833-3104
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
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_______________________________________________
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Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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