[TowerTalk] Coax Arms for Tri-Ex Crank-Up Towers

[Bill Winkis]

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 at bellsouth.net

http://www.kc4pe.com/amateurshack.htm


----- Original Message ----- 
From: "jimlux" <jimlux at earthlink.net>
To: "Larry Essary" <larry at pulse.net>
Cc: <towertalk at 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 ?
>>
>
>