[Moon-net] 5500 ROTATORS FOR EME ELEVATION

[Darrell]

Hi Again
I am not sure the speed is the major concern Folks. It is more Max 
Mast Diameter which can be supported with Dacron Line, some 
what.........But very soon due to winds you will be replacing the 
Sandwiched Ring Gears if the Array is very large ( no sure if they 
are still available at all)........of which I still have a Spare set of.

Regards, Darrell


At 09:56 AM 25/01/2008, Charlie Kahwagi wrote:
>Hello all......not sure if this solution has been mentioned...but 
>just in case......
>
>I have used the 5500 for EME purposes, and I slowed mine down using 
>a 555 timer  and a transistor to switch the common   line  in 
>"pulses".  The circuit is in the "VHF-UHF DX BOOK"  and works 
>exceptionally well.  The advantage with this arrangement is the 
>motor always sees the full voltage and so is "less stressful" on the 
>motor  than other arrangements which reduce voltage .  The circuit 
>is easily adaptable to AC or DC motors.  I built the board  and 
>placed it in the rotator controller and a back panel switch  selects 
>it in line or not.
>The rotator can be slowed to "less" than a crawl.
>
>73
>Charlie
>VK3NX
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