Paul_Rimmer Posted January 16, 2018 Share Posted January 16, 2018 A bit of help please. With my limited soldering and electronic skills, I'm embarking on fitting a decoder to a Hornby Thomas loco and trying to follow the instructions given on the website under Decoder Installation Guides for the R351 Thomas. It seems fairly straightforward until I take the top of the loco and find that the arrangement is not quite as shown in the picture in that the black capacitors are too close to the orange one to follow the method - see my attachment. I've seen it suggested elsewhere that the capacitors are not necessary so can I just cut out the black ones? If not, do I just detach the black capacitors and solder them back on further away from the orange one?/media/tinymce_upload/73bbeae7bf98ac796df48e873e2fb3a4.jpg Link to comment Share on other sites More sharing options...
96RAF Posted January 17, 2018 Share Posted January 17, 2018 Strip it back until you have a bare motor and bare pickup tags. Throw the bits you remove in the bin.Then wire decoder wires red and black to the track pickups and orange and grey to the motor. The wiring clour code is on the same page as you gotmthe conversion info from.Rob Link to comment Share on other sites More sharing options...
Paul_Rimmer Posted January 17, 2018 Author Share Posted January 17, 2018 Thanks Rob. That is the reassurance I need. Link to comment Share on other sites More sharing options...
96RAF Posted January 17, 2018 Share Posted January 17, 2018 For convenience you may wish to fit a decoder socket as its the same amount of soldering work as hard wiring a decoder and you dont need to cut the decoder plug off so making any future work so much easier. You can easily source the socket. X9084 is typical. You can attach it to the loco after soldering the wires on using a double sided sticky pad. The motor wires go to pins 1 (marked) and 5 and the pickup wires to the other two corners (pins 4 & 8) Rob Link to comment Share on other sites More sharing options...
Fishmanoz Posted January 17, 2018 Share Posted January 17, 2018 Just for future reference, the black components are inductors not capacitors, and they still go in the bin. Easy to tell the difference - capacitors go across the motor contacts, inductors in series between one motor connection and one side of the pickups. Link to comment Share on other sites More sharing options...
Paul_Rimmer Posted January 17, 2018 Author Share Posted January 17, 2018 Thank you both for your comments. I have gone for the direct soldering this time Rob but will bear your suggestion in mind for future. Thomas is now DCC.Fishmanoz, it's a long time since I did Physics A Level, so I appreciate the electronics refresher. Link to comment Share on other sites More sharing options...
kreburn Posted April 9, 2018 Share Posted April 9, 2018 is this the same for thomas R9287? Link to comment Share on other sites More sharing options...
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