Hi Marc. The best way I found was to make a few turns of coax around the
mast pipe right above the thrust bearing. Don't see a need to have a loop
hanging down. I tape the coax to the boom right to the mast. Then I wrap the
coax around the mast for 3 turns. Then I bring it over the edge of the top
tower plate. I wrap several layers of tape around the coax where it goes
over the tower edge in order to protect the coax. This way there is minimum
stress on the coax as the rotor turns plus nothing dangling in the wind.
Tony
N2TK
-----Original Message-----
From: towertalk-admin@contesting.com
[mailto:towertalk-admin@contesting.com]On Behalf Of Marc Holdwick
Sent: Saturday, November 23, 2002 18:27
To: towertalk@contesting.com
Subject: [Towertalk] Rotor Loops
I just checked the archives and didn't see anything that addresses my
question:
What is the proper way to do a rotor loop?
It seems that the usual way is to fasten the coax parallel to the mast just
above the top of the tower do a U shaped loop (in a vertical plane) and then
refasten it parallel to the tower legs.
I was playing around with this and it seems that it transfers the rotation
of the mast into torsion of the coax. Is torsion "good" for coax? (I'm
planning on using Cable X-Perts' CXP-1318FX [LMR-400UF equivalent]).
Another method that I can envision is to have the coax come off the mast and
tower PARALLEL to the horizon and do the loop in the horizontal plane. Now
the coax will coil and uncoil versus twisting.
Would this be better for the coaxial cable in the long-term?
Any comments?
Thanks & 73,
Marc - N8KWX
_______________________________________________
AN Wireless Self Supporting Towers at discounted prices,
See http://www.mscomputer.com
Wireless Weather Stations now $349.95. Call Toll Free,
888-333-9041 for additional information.
_______________________________________________
Towertalk mailing list
Towertalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|