adanapress Posted June 4, 2020 Share Posted June 4, 2020 Regarding the EMB under the old R157 and the early Pullman and the Dock shunter. I run a fleet of these, and have a number 'gorn dead' on me. Can anyone say what the details of the electronic components within the wiring , on the live side wire coming up from the insulated pick up, in my case thats the plus side. The old Triang/Hornby service sheet reference reference for this part is X217. It was I thinkoriginally for suppression of TV interference. I'm hoping that todays equivalent bits are a deal smaller. Or maybe with the changes in TV, to digital and different frequencies, maybe they are no longer needed, All advice welcome. Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted June 6, 2020 Share Posted June 6, 2020 It was a capacitor, to quench the sparking on the commutator in particular. It will run without it, and broadcast digital transmission both rejects the RFI such a motor produces, and error corrects any breakthrough very efficiently. However, we really ought not to shower the airwaves with junk, so a substitute small capacitor would be a good plan for old sparky. Hopefully someone will be able to recommend the suitable component choices. (DCC user, which has all the RFI suppression built in, so completely out of touch...) Link to post Share on other sites More sharing options...
DCB Posted June 6, 2020 Share Posted June 6, 2020 I also have several, most have the original set up but when the wires snap off I just bung in any old ceramic capacitor which will fit, the bigger the better. I have found when testing motors on the bench that they run a lot sweeter and faster for any given voltage when there is a capacitor in circuit in parallel with them Link to post Share on other sites More sharing options...
mossdp Posted June 7, 2020 Share Posted June 7, 2020 If completely failed, sometimes it is the wire come unsoldered from the pickups underneath. Other times it can be corrosion at the end of brush spring where it meets the phosphor bronze strip through a hole or corrosion the opposite end where the strip goes under the magnet. Link to post Share on other sites More sharing options...
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