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Stewart C628 decoder placement

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  • Member since
    August 2005
  • From: Ontario, Canada
  • 180 posts
Stewart C628 decoder placement
Posted by Ballantrae Road on Sunday, December 14, 2008 12:06 PM

I'm still scratching my head over this one. On my Stewart Alco C628 the NMRA plug is underneath the PC board. I've never see this before. How does one fit a decoder there? Doesn't look like much place.What decoder should I use?

 

Thanks,

Tom

  • Member since
    July 2006
  • 3,312 posts
Posted by locoi1sa on Sunday, December 14, 2008 12:25 PM

 Tom

 Train control systems has a decoder designed especialy for the Stewart locos. I believe its a DP2x. Its a great decoder with Back EMF and excelent lighting software.

       Pete

 I pray every day I break even, Cause I can really use the money!

 I started with nothing and still have most of it left!

  • Member since
    July 2006
  • 3,312 posts
Posted by locoi1sa on Monday, December 15, 2008 4:21 PM

 Tom

 Here is a link to see a picture of the decoder for your Stewart.

 http://www.tcsdcc.com/decoderpics/sb.html

  Pete

 I pray every day I break even, Cause I can really use the money!

 I started with nothing and still have most of it left!

  • Member since
    October 2005
  • 1,047 posts
Posted by betamax on Monday, December 15, 2008 5:21 PM
That is the way I did it too. Plugged in a Digitrax decoder with the NMRA plug, ran the wires between the PCB and the tower, and stuck the decoder to the underside. The only thing I didn't like was how hot the rectifiers for the classification lights get. Other than that, it worked just fine.
  • Member since
    August 2005
  • From: Ontario, Canada
  • 180 posts
Posted by Ballantrae Road on Saturday, December 20, 2008 12:10 PM

Thanks for the link. However mine is different. There is plenty of room on the circuit board shown photo in the link you provided, but as you can see my NMRA plug is located further back over the flywheel next to a connector. See the photo attached. Now I wonder, is the black 8 pin connector removeable? If yes then maybe I can reposition it on top. I don't want to try to take it off as it may be soldered on. I hope the photo can be viewed.

  • Member since
    July 2006
  • 3,312 posts
Posted by locoi1sa on Saturday, December 20, 2008 3:54 PM

 Tom

 It looks like you could fit an MC2 decoder with short harrness under the board. The decoder would be between the motor and board. If you turn the board over there may not be enough room for the shell to fit back on.

  Pete

 I pray every day I break even, Cause I can really use the money!

 I started with nothing and still have most of it left!

  • Member since
    February 2002
  • From: Reading, PA
  • 30,002 posts
Posted by rrinker on Saturday, December 20, 2008 9:29 PM

Another option is to just get a decoder with wire leads and solder them to the circuit board where the 8-pin connector is. Just remember you're looking at the bottom and keep the order of the pins correct. You can desolder the 8-pin plug and actualy feed the wires through the holes or just solder them right to the surface.

                          --Randy

 


Modeling the Reading Railroad in the 1950's

 

Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.

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