[amsat-bb] Re: Yaesu G5500 rotor problem

Bill billdz.geo at yahoo.com
Sat Jun 18 03:29:30 PDT 2011

Thanks to all who replied. Got it fixed, just a bad wire.

On Jun 18, 2011, at 3:53, "i8cvs" <domenico.i8cvs at tin.it> wrote:

> Hi Bill, NZ5N
> I hope you have the schematic diagram with you.The Azimuth meter M-1
> has a terminal connected to the ground and the other one is connected to
> R3 and C-10 on operational amplifier Q3
> Disconnect the hot wire of M-1 connected to R3 and put in series between
> it and ground a DC milliamperometer (1 mA f.s or less should be OK)
> If manually rotating the Azimuth the milliamperometer is moving back and
> forth than the electrical circuitry is working correctly and probably the
> meter M-1 has received some shock and is stuck against the plastic cover of
> the instrument.
> To calibrate again the Azimuth meter adjust the 10 k potentiometer VR1 for
> full scale indication when the rotator is fully turned by 450°
> VR1 i.e. the Azimuth Full Scale potentiometer is the first pot. looking the
> Control Box from the back.
> Have fun.
> 73" de
> i8CVS Domenico
> ----- Original Message -----
> From: "Bill Dzurilla" <billdz.geo at yahoo.com>
> To: <amsat-bb at amsat.org>
> Sent: Saturday, June 18, 2011 12:17 AM
> Subject: [amsat-bb] Yaesu G5500 rotor problem
>> Hi,
>> I brought a G5500 with me to Europe and have it up and running.  The
> elevation rotor is working as it should.  The azimuth rotor turns the
> antenna left and right as it should when the button is pressed, but the
> readout on the controller is not working.  When I turned on the controller,
> the azimuth meter pinned to the right (i.e., beyond the red 90 degrees
> mark).  I was able to adjust on the back to get the meter unpinned, but the
> indicator does not move at all when the rotor is activated.  Any ideas on
> what may be wrong?
>> 73, Bill NZ5N/OM3BD
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