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[Towertalk] How do you calibrate a CDE rotor?

To: <towertalk@contesting.com>
Subject: [Towertalk] How do you calibrate a CDE rotor?
From: n4kg@juno.com (n4kg@juno.com)
Date: Tue, 19 Nov 2002 09:07:58 -0600
I didn't think the CD45 had a brake.

You may want to clean the indicator pot and wiper arm.
Also increase the tension of the copper strap that engages
the top of the rotor and make SURE it is properly aligned with
the molded ridge in the top rotor housing.

Tom  N4KG

On Tue, 19 Nov 2002 08:08:05 EST K4BEV@aol.com writes:
> I have a CD45-II rotor, the control box is one with 3 levers (ccw, 
> brake, 
> cw), an on/off switch, and a calibrate pot.
> On the bench I set the rotor up so that it was on North when at the 
> center of 
> it's range. Put it up and aimed the antenna North.
> At either end stop the controller says South - the antenna is 
> pointing South.
> When the antenna is pointing North, the box says North.
> BUT
> If I turn it till the box says West, the antenna is pointing South 
> of West.
> If I turn it to East the antenna is pointing North of East.
> I believe that there is something that I'm missing in the 
> calibration 
> procedure, but have no idea what.
> Can you help?
> 
> 73, Don - K4BEV
> 
> 
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