[amsat-bb] Re: inquiry about homebrew az-el systems

Gus 8p6sm at anjo.com
Wed Feb 27 17:30:36 PST 2013

Returning to this topic...

I'm thinking about a rotator that can handle a small system like the 
Arrow, or the Cushcraft A270-6s or even the A270-10s.  NOT big boomers 
like the KLM 22/40 el CP yagis!

So we're looking at 1½ - 2 sq. ft of windloading, and maybe 10 lbs of 
weight.  (Including some sort of crossboom, clamps, coax and 
counterweights.  Rear mounted antennas like the Arrow will need a 
rear-mounted counterweight.)

Anybody qualified to say what that adds up to in terms of TORQUE 
required from the motors?  With a little extra thrown in for a safety 
margin, maybe?

I think a simple, low-cost, easily reproducible design is probably 
doable, if we combine our ingenuity and expertise.

-- 73, de Gus 8P6SM
Barbados, the easternmost isle.

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