[TowerTalk] Pull Down Cables

[Ken Beals]

The other way I've seen this done was on the Tri-Ex Sky Needles.  They 
had one continuous cable, driven by a friction drive arrangement.  Sort 
of the same thing, except that the cable did not terminate on the drum.  
The drum had a fancy machined surface that would grip the cable to drive 
it in the proper direction.  As I remember it, the cable looped around 
the drum several times and a set of spring loaded tensioner pulleys 
kept  everything tight.  I think the advantage was that you didn't have 
to worry about the cables wrapping up on themselves. 

Ken K6MR

Pat Barthelow wrote:

> First, a Million Thanks to those TT'ians who are valuable helpers in 
> getting the
> old tower trailer tower up again....
>
> A question:
> Some towers implement a pull down function.  Does this function 
> require a second cable leaving the lift winch, in the 'opposite' sense 
> than the lift cable?   Or are there other ways to implement the pull 
> down function?
>
> 73, DX, de Pat Barthelow  AA6EG
> (831) 646-0388    aa6eg at hotmail.com
>
>
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