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Re: [TowerTalk] Single Line Tram System - Ideas Please

To: "'TowerTalk Post'" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Single Line Tram System - Ideas Please
From: "K8RI on TowerTalk" <K8RI-on-TowerTalk@tm.net>
Date: Fri, 20 Oct 2006 01:45:27 -0400
List-post: <mailto:towertalk@contesting.com>
The single wire tram is a lot more stable than the old two wire and a whole lot easier to set up.



I don't understand why anyone is still using a two wire tram
system.

A single tram wire works superb.  I use a similar set up to
Jim's and others hanging the antenna below the single tram
line.  To attach the antenna to the tram pulley, I welded an
'eye' to the saddle of a muffler clamp, 2", 3", 4" or what

I just use the boom to mast clamp u-bolts.


ever the size of the boom.  I attach the muffler clamps to
the boom on either side of the boom to mast plate, and at a
tilt such that when the antenna goes up the tram line the
'leading' element tips are pointing up to make sure they
clear any guy wires near the top.  The rope from the tram
pulley is tied to the 'eyes' and adjusted such that the
antenna is balanced.  I then attach a rudder ( I use a piece

If you take the antenna up sideways which makes it a whole lot easier when you get to the top, take the "pull rope", atach it to the boom to mast clamp just like the tram. The run the rope up the nearest element and take a half hitch near the end of the element. Yes it'll make the antenna come up turned a little, but it should be no problem. When the half hitch reaches the mast at the tower, just slide the half hitch down the element toward the boom. When you get to the boom the pull rope can be disconnected. I've used this method with tall gin poles and tall verticals to easily install antennas I'd never be able to do otherwise without a lot of work.



73


Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com

of 1 x 4 wood) to the boom and to the tram line to stop the
antenna from twisting while moving up the tram line.
This makes raising an antenna a 'piece of cake'!

Doug/VA5DX


Subject: Re: [TowerTalk] Single Line Tram System - Ideas Please

I don't get it, Lee. I've been using single-line tramming
here for years. We've
installed and uninstalled everything you can imagine - not
too long ago, a 4-el
40m Optibeam [great antenna; deserves this plug] went up the
tram line. For
that lift, we used a tram line made of guy wire and pulled
it up with a power
winch attached to the base of the tower. The pull line was
also wire rope. For
smaller jobs, we get away with a rope tram line and
hand-pull the antenna with
a rope.

I've never considered a fancy two-line tram; never saw a
need. I simply hang
the antenna from the pulley that rides the main tram line
with two straps to
the boom. The straps are attached to the boom at a spacing
that ensures the
antenna is balanced under the pulley. Then we add a tag line
somewhere to
control the antenna, and away we go.



Jim Idelson K1IR
email    k1ir at designet.com
web    http://www.k1ir.com
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