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

[Stephen E. Belter]

Sion,

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.
>
>73,
>Sion Chow Q. C.,
>9M2CQC, WQ2C