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Re: [TowerTalk] Yaesu G-450XL Antenna Rotor Problems

Subject: Re: [TowerTalk] Yaesu G-450XL Antenna Rotor Problems
Date: Thu, 28 Feb 2008 17:49:19 EST
List-post: <">>
Well, it is possible you got some RF into the unit, but they  are meant to 
operate in an RF environment. And I do not believe in  coincidences, but this 
one is worth a try.
The indicator is run by a DC motor driving a gear reduction system  through a 
belt. The Overlap LED is told to illuminate by the control box (not  the 
rotor). As I remember, my older 800 has a cam geared on the gear unit  that 
a switch to indicate overlap. My newer, 1000, uses a comparator that  reads 
the position pot inside the control unit (also rotated by the  gear reduction).
A slipping or broken belt or an intermittent motor (they are  brushed PM 
units) will cause all sorts of erratic and confusing dial behavior. I  had a 
go bad, and it too, would sometimes run under transmit. I cannot  explain why 
it did so; the brushes were bad. But it did.
Worth a check.
-John, N9RF

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