cedric_fairweather Posted December 22, 2023 Share Posted December 22, 2023 Happy Christmas everyone.Have any of you added a decoder to the GWR 2800 please? Would really be helpful if there is any info available to wire this one please. Link to comment Share on other sites More sharing options...
Going Spare Posted December 22, 2023 Share Posted December 22, 2023 Can you confirm that the loco is a Hornby tender-driven ringfield motor model with the factory-fitted plastic smoke unit and firebox glow as per service sheet 155. Link to comment Share on other sites More sharing options...
cedric_fairweather Posted December 22, 2023 Author Share Posted December 22, 2023 It is the one you describe but I can`t find the service sheet to confirm. SS 277B looks very familiar. Link to comment Share on other sites More sharing options...
Going Spare Posted December 22, 2023 Share Posted December 22, 2023 Service sheet 155 is viewable within the 'Useful Links' post pinned to the top of the General Discussion forum section. It covers the UK-made version with electrical conductivity through the loco chassis and tender motor block, whereas 277/B is its Chinese successor with more complex wiring due to it having pick-ups on both the loco driving and tender driven wheelsets.Are you seeking to have the smoke unit and firebox glow controlled by the decoder?I will now hand over to those who are competent with DCC operation. Link to comment Share on other sites More sharing options...
cedric_fairweather Posted December 22, 2023 Author Share Posted December 22, 2023 Thanks very much for your help, I have found the SS155 but now confusion reigns so will have to wait until I`m home to check out which one is correct. Link to comment Share on other sites More sharing options...
ColinB Posted December 22, 2023 Share Posted December 22, 2023 Yes, I did a conversion for one of these. I must admit I removed the smoke unit in mine as I found it was distorting the body. The Ringfield when I tested it had a stall current of about 0.8 amps, so I used a Zimo MX600R which has a higher current rating than a Hornby decoder and very many others. It is about £25.00. It also has current limit on its ports/function outputs and will drive your smoke unit. You can use function 1 for smoke and function 2 for firebox flicker, or vice versa. Link to comment Share on other sites More sharing options...
ColinB Posted December 22, 2023 Share Posted December 22, 2023 Thinking about this a bit more you are going to have issues with the placement of the decoder, for the firebox flicker and smoke the decoder needs to be in the loco but the motor is in the tender. You are going to have to consider running the motor wires to the tender. What I did on mine was to use the Hornby 4 way connector or a suitable alternative. Link to comment Share on other sites More sharing options...
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