[amsat-bb] G5500 left turn relay failure

[Gerald Witalec]

 Just curious, why are so many of you on this board having problems with the G5500?Looks like I will  make my own AZ/EL rotor with high torque stepper motors and controlledeither with Arduino or Raspberry Pi.
Jerry...W8RQM



    On Monday, October 19, 2020, 5:45:18 PM EDT, Ken Swaggart W7KKE via AMSAT-BB <amsat-bb at amsat.org> wrote:  
 
 My G5500 control box won't command the rotor left, but right works fine. No
voltage to the #4 connector when I press "left", but if I put some pressure
on the relay the voltage intermittently returns. So, guess the relay
contacts are dirty.

 

Looking at the schematic it looks like both the right and left relays are
the same, but use different connections. So. thinking I'll just remove and
the two and swap relays. (This unit has been in daily use since 2002!)

 

Are these relays available from Yaesu or someone in the US? Did a quick
Google and DigiKey search but didn't find them.

 

Just noticed there is a little lid on the top of the relay. When I popped
that open there is a lot of black residue on the inside of the lid and I
just might be able to clean the contact!

 

Ken, W7KKE

 

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