[amsat-bb] G-5500/LVB Tracker

[Mike]

George, looking at the schematic, the az/el signals from the rotor pots feed 4 op amps.  Two of the op amps feed the front panel meters, the other two op amps feed the din connector the LVB Tracker is plugged in to.  Since the LVB Tracker is reading correctly and the Azimuth meter reads ok the problem with the elevation meter is either the meter itself or the op amp circuit that drives it. You’ll hafta do some signal tracing...  Good Luck’

Mike
WB8CXO

> On Feb 10, 2019, at 12:30 PM, Mark L. Hammond <marklhammond at gmail.com> wrote:
> 
> George,
> 
> Yes, sadly, I have (and currently do...).  In time, I get used to ignoring the meters ;)  Seems like a long time ago I took apart the G-5500 box, and it was a dirty contact/corrosion/grounding issue of the meters/board?  Can't recall...
> 
> If you debug, please share what you find...
> 
> Mark N8MH 
> 
> At 05:24 PM 2/10/2019 +0000, George Sakai via AMSAT-BB wrote:
>> Has anyone experienced problems with the Elevation or Azimuth indicator (meter) of G-5500 rotator ?  The Elevation meter does not move at all.  The LVB Tracker shows correct Azimuth and Elevation angles and the G-5500 rotator follows the correct angles.  However, the Elevation meter of G-5500 remains at zero degree.  The Azimuth meter works just fine.  Thanks. 73, George N3GS _______________________________________________ Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb 
> _______________________________________________
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