Need help identifying a decoder board that is out of its packaging

Hello everyone,

Sometimes I buy decoders when I have the extra cash and install them sometime later. I have one loose decoder board in my drawer that I cannot for the life of me identity who manufactured it and the locomotive it is designed for. I've google searched and looked at available photos on manufacturer website. Zip, Zilch, Nada. It is a drop in decoder board.

I tend to concentrate on a consistent manufacturer for my decoders (TCS) Occasionally I buy decoder equipped locomotive from Atlas. Sometime I pick up decoders at train shows. The decoder may be a couple years old at this point.

The board has the following markings:

In very fine print: 637XO10R5. (the O and 0 may be misidentified because they are hard to see even under magnification)

In slightly larger print: 4907

No other manufacturer markings

It's design has the four pads to collect power from the frame, which leads me to believe it is for an Atlas locomotive given the typical Atlas DCC ready frames.

I'll try to upload pics, but this website challenges me in that regard.

Thanks for reading this. Any help is appreciated

 

You should be able to use alligator clips to hook it up to your programming track. Then you can query the relevant CVs to find the mfg and model. https://www.nmra.org/sites/default/files/standards/sandrp/pdf/appendix_a_s-9_2_2.pdf

 

If you change the O to a zero in the markings a web page that no longer exists comes up but the description says it is for a Atlas Sd60. But that's all I can see.

 

Thanks everyone.

NtheBasement: such a good idea but still not sure what loco it goes to -but that is a major step forward to get basic info. Thanks!

McCloud- nice sleuthing! But I don't have any SD60s. I do have an SD50 that needs a decoder but the one in the pics is way too short to fit. I am going to check and see if the size is similar to TCS ASD4, which TCS website says fits GP 30 and 35, which I have several and two that need decoders.

Thanks everyone! Trainboard is an awesome resource.

Mark

 

Atlas made by NCE is the best I come up with. Used in GP38s and GP40's

 

Ahh, yes, a not-quite-so-drop-in decoder. We've come a long way, thank goodness!

The crystal oscillator (or just crystal?) is the 2nd largest component on the decoder!

 

it’s just a crystal, but it’s the key component in the crystal oscillator, there will be a couple caps, and resistors that will make up the rest.

 

Tried your idea but got CV CANNOT BE READ message, any other ideas much appreciated