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

[Lizeth Norman]

Gus and the gang,
What about K5OE's array here:
http://rfanat.ru/s8/P3D_yagi.htm

Still think that using:
8x4 aluminum tube stock
1" aluminum round stock
1 arduino
4 relays
a 24 v ps
some limit switches
fuses, of course
two of the appropriate value pots and maybe some gearing
and a few gears, bearings and motors for the drivetrain,
should give us a complete -5400 or -5500 clone.

Norm n3ykf

On Wed, Feb 27, 2013 at 8:30 PM, Gus <8p6sm at anjo.com> wrote:
> 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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