[amsat-bb] Re: Yaesu G-5500 Azimuth Motor Replacement

Stephen E. Belter seb at wintek.com
Tue Jul 9 14:10:16 PDT 2013


I don't own a G-5500, but I do have both a G-5400 and G-800.  The G-5400
and G-5500 are similar (not identical) judging from the manuals.

>From looking at the manual for the G-5500, the azimuth rotor is completely
different from the G-800.  The G-5500 (and the G-5400) azimuth rotor is an
AC motor with two coils and three wires for the motor.  The G-800 is a DC
motor with only two wires.  (Both systems use an additional 3 wires for
the position potentiometer, so five wires for the G-800 and six wires for
the G-5400/G-5500.)

The G-450A rotor is similar to the azimuth half of the G-5500, judging
from the manual. However, I'd look for someone who owns a G-450A who can
verify that for you.  The G-450A manual omits a schematic and some
important specifications like the motor voltage.  You may also be able to
get some help from Yaesu customer service.

73, Steve N9IP
Steve Belter, seb at wintek.com

On 7/9/13 12:41 PM, "Sion Chow Q. C. (9W2QC)" <9w2qc at 9w2qc.net> wrote:

>I have a Yaesu G-5500 rotator that has a spoilt azimuth motor while
>the elevation motor works fine.  Looking at the specifications
>published by Yaesu, the G-800 rotator seems to be very similar with
>the azimuth motor of the G-5500.
>Instead of purchasing a whole new set of G-5500 just to replace the
>spoilt azimuth motor (the control box is working and this has been
>verified with another working azimuth motor), I wonder if anyone has
>tried replacing the azimuth motor the G-800 instead?
>Will the G-5500 control box work with the G-800 motor, are there some
>modifications needed, or is this simply not possible?  Any pointers
>will be greatly appreciated.
>Thank you.
>Sion Chow Q. C.,

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