I prefer rg-213 for rotor loops.
Just tape to hold cables to the tower legs is more than sufficient. No need
for hose clamps, cable hangers, conduit, or other fancy brackets, and no
need even for expensive scotch tape. I use the cheapest plain black
electrical tape I can find, several wraps around the leg every couple feet
holds huge bundles of cables securely. It is easily removed when
adding/removeing cables. (Don't say you won't, everyone changes their mind
or comes up with something new they want to put up!) Also, going up the
inside of the tower just makes it harder to get the cables out later, the
large holes in tower sections and the exposure of the cables at the top
and/or bottom of the tower pretty much break the so called faraday cage
anyway.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: towertalk-bounces@contesting.com [mailto:towertalk-
> bounces@contesting.com] On Behalf Of Fred Mott
> Sent: Monday, September 12, 2005 17:05
> To: towertalk@contesting.com
> Subject: [TowerTalk] Tower Cables
>
> 1.. I have Andrews 7/8 Helix from the shack to the tower top. What coax
> (with type N connectors) would you recommend to go up the mast to the
> antenna?
>
>
> 2.. I can install my rotor and SteppIR control cable up the inside of
> the tower either with 1 inch plastic conduit, which would be ½ inch from
> the tower legs so the plastic conduit will be free to move up and down
> with temperature and weather change. Or I could secure it directly
> inside the tower secured by SS hose clamps over rubber tape and or Scotch
> 88 tape. I read some time ago that running the cables inside the tower
> framework next to one of the legs would add act as a faraday shield which
> would help protect the lines from EMP (nearby lightning). The problem
> with it secured directly to the tower leg would cause the SteppIR control
> cable to turn color and maybe have a premature life. The plastic conduit
> is the type that is UV protected. I would only have to have a small nylon
> rope taped to it every so often to prevent the cable from stretching from
> its own weight. The nylon rope would be secured in a conduit box at the
> top of the tower. I prefer the conduit but what if lightning does hit,
> will the cables have the same protection inside the conduit verses secured
> directly to the tower leg inside the tower. What do you think or prefer
> assuming that the extra work and cost were not a variable?
>
>
> Thank you, Fred Mott, AB8AH
> _______________________________________________
>
> 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.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
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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