Use a cable with a stranded center conductor and braided shield for the section that will move. I used the flexible version of LMR400 at my previous QTH. These have higher loss than other types, but solid center conductors and foil shields will fail in a year or so when flexed repeatedly.
73,
John KD6OZH
----- Original Message ----- From: "Ollie Eisman" ollie@earthrobot.com To: "AMSAT BB" amsat-bb@amsat.org Sent: Tuesday, January 08, 2008 17:31 UTC Subject: [amsat-bb] Cable question
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