[amsat-bb] Re: Rotors

George Henry ka3hsw at att.net
Mon Dec 20 08:01:42 PST 2010

If you're talking light-duty, for modest-sized homemade antennas, there are 
several azimuth-only TV rotors and light-duty ham rotors that would do the 
job.  Just mount your antennas at a fixed elevation of 15 degrees, and you 
will be able to work most passes up to 45 degrees or so.  (If they go higher 
than that, just work 'em early or late in the pass when they are lower).

Look for a rotor that provides a DC position feedback voltage to the 
controller (0 to 5 volts for 0 to 360 degrees is what most satellite 
controllers expect - you may need to modify the rotor or its controller to 
provide the voltage.)  There was one available at a lot of home-improvement 
and *-Mart stores a few years ago called the Orbit 360 that was ideal. 
Check eBay, Craigslist, and The Rotor Man on the web for that, and other 

Software-wise, I am a HUGE fan of SatPC32.  The developer, Erich Eichmann, 
is a member of this group and provides unparalleled support, the price is 
very reasonable, and 100%  of the proceeds go to AMSAT to build and launch 

George, KA3HSW

----- Original Message ----- 
From: "Zachary Beougher" <zack.kd8ksn at hotmail.com>
To: <amsat-bb at amsat.org>
Sent: Monday, December 20, 2010 8:53 AM
Subject: [amsat-bb] Rotors

> All,
> Is there any other good light duty rotor other than the Yaesu G-5500 that 
> would work well for satellite work?  I might like to consider getting one 
> for some homemade antennas that I might use for a rover setup.  Other than 
> the rotor and a computer, what do I need to be able to get the thing to 
> track the birds.  I know I obviously need a tracking program like SatPC32, 
> Orbitron, HRD – Are any of those better than another?  Sorry for the 
> “amateur” questions – I have never done anything with rotors – just the 
> Arrow/HT and standing out in the cold freezing combination. ;-)
> 73!
> Zack
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