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Re: G-5400B Elevation Rotor



Hi Harmen, VE3EMA

Disconnect wires E1-E2-E3 from control box and connect to it
an external 500 ohm potentiometer as indicated by the schematic
diagram.

If rotating the potentiometer by hand it works correctly it means that
the control box is fine and you have a problem in to the rotor.

It happen very often that the screw holding the gear to the shaft
of potentiometer is loose.

Best 73" de

i8CVS Domenico


----- Original Message -----
From: "VE3EMA, Harmen" <harm@nexicom.net>
To: <amsat-bb@AMSAT.ORG>
Sent: Tuesday, January 03, 2006 6:56 PM
Subject: [amsat-bb] G-5400B Elevation Rotor


> Hi all,
>
> Has anyone with a G-5400B elevation rotor experienced the Potentiometer
> going out of alignment?
> I suddenly discovered that zero degrees elevation is now reading 36
degrees
> (.946 volts between E2 and E3, not 0 volts).
>
> When I rotate the rotor 180 degrees, the needle shows 180 degrees
elevation
> long before the antenna is actually at 180 degrees. When the antenna
reaches
> 180 degrees, the needle jumps to 0 and stays there, which would seem to
> indicate the wiper of the pot is in a non conductive area.
>
> It seems like the pot gear has jumped teeth similar to a timing belt on an
> engine.
>
> Harmen, VE3EMA
> ----
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----
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