A 5500 rotor and two 18 foot antennas on a telescoping mast? Too much. Suggest Roln 25 or better. The mast will need a lot of Guys and the Top of the mast may be too small to fit inside the cost-extra mounting bracket for the rotor. As for Coax, I use LMR-600-UF. I had all cables custom cut and connectors pre installed. (davisrf.com) The lmr-600 will cost you about $3+ per foot, but.. for runs of less than 100 feet you can forget about coax loss on all freq below 1.2 ghz. This coax IS flexible enough to go around the rotor. If you are not using preamps, you can run 1 section from the Radio to the antenna and around the rotors. My 5500 and array M2, with lmr-600-uf has been in use for 4 years, no problems. Any satellite that I can hear, I can work.
Wf1f www.marexmg.org
--- Edward Cole kl7uw@acsalaska.net wrote:
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
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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 ======================================
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