On my LM-70 I use three cables up..Co-ax...Rotor control cable...Quad band
Switching cable...these cables cut to length are taped together very
carefully in a straight triangle with no crossovers....they are feed into a
length of "Braided 1 Inch Shield".....The Braided Shield is then
pulled-stretched and grabs and locks onto the cable triangle...at the top of
the tower the cable stand off arm is re-enforced, and at the point just
below the cable turn toward the tower a "Large Cable Grip" is installed,
with about an 8 inch grip/grab sleeve....the grip is made so the outside
woven braid shield is grabbed and carries most of the cable weight. This way
the vertical weight is being shared by the ..Braided sleeve and the three
cables equally....
Because it is a very neat install...when the tower is retracted the cable
coils up perfectly at the base...
-Bill
kc4pe@bellsouth.net
http://www.kc4pe.com/amateurshack.htm
----- Original Message -----
From: "jimlux" <jimlux@earthlink.net>
To: "Larry Essary" <larry@pulse.net>
Cc: <towertalk@contesting.com>
Sent: Thursday, October 29, 2009 7:12 AM
Subject: Re: [TowerTalk] Coax Arms for Tri-Ex Crank-Up Towers
Larry Essary wrote:
Has anyone found an improved method for running coax down crank-up towers
?
I have seen the fixed arms where the coax "accordions" as the tower comes
down.
I have been told that even with the tower fully extended the coax whips
around in the wind
I have seen the "loop" or ring standoffs where the coax "threads the
needle" as
the tower comes down and the coax piles up on the ground or in a
container.
I would think there is a lot of stress on the cable having a single
attachment point
at the top of the tower. Also some logistic problems with the coax piling
up.
Any improved ideas ?
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