Either run LMR-400 all the way (70-foot) or for lower loss run 50-foot 1/2-inch hardline (Andrew Heliax LDF4-50A) + 20-foot of LMR-400. Use N-female connectors on the hardline and N-male on the LMR-400.
The telescoping mast is not very rigid for a rotor and antennas so you need guy lines at 10 & 20 foot levels. Raising and lowering will be tricky so you should have 2-3 people to help you. Why not look for two sections of Rohn-25 tower (used can be had for $50/section)?
Ed - KL7UW
At 08:31 AM 1/8/2008, Ollie Eisman wrote:
Hi everyone,
I would like to use a G-5500 rotor on top of a 20' telescopic mast with 2m and 70cm sat antennas. Assuming this isn't a bad idea to begin with, my next goal is to find RF cables that will work best with this type of tower given it will be raised and lowered frequently, thus causing a lot of extra cable flex. (I am not even sure of the best way to run cables up the to rotors when the mast is telescopic - ideas?)
I am looking at 20+' for the tower plus another 50' or so back to the shack. An suggestions?
Love those covenants... :)
73, Ollie, AJ1O _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
73, Ed - KL7UW ====================================== BP40IQ 50-MHz - 10-GHz www.kl7uw.com 144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w DUBUS Magazine USA Rep dubususa@hotmail.com ======================================