[amsat-bb] Re: Cable question

Edward Cole kl7uw at acsalaska.net
Tue Jan 8 21:59:34 PST 2008

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... :)
>Ollie, AJ1O
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Ed - KL7UW
  BP40IQ   50-MHz - 10-GHz   www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
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