gwrcollet Posted March 4, 2021 Share Posted March 4, 2021 I have some old 3.5 lokosound decoders, I would like to install in a non drive units? I have tried in a steam engine with no motor, the sound works all but the chuff/ chuff when you turn the speed up on the leading loco. is there a way to get it to work? the drive on loco has long gone. Link to post Share on other sites More sharing options...
Pete the Elaner Posted March 4, 2021 Share Posted March 4, 2021 I don't know the answer but I understand why it is not working. The decoder is trying to keep the exhaust beats in sync with the wheels. It does this by detecting something connected to it which is linked to the wheels - the motor. Since you have no motor, it cannot detect it, so produces no exhaust sound. Diesels are unaffected by this because the engine sound is not in sync with wheel revolutions. Link to post Share on other sites More sharing options...
gwrcollet Posted March 19, 2021 Author Share Posted March 19, 2021 I have got around this problem it works for Diesels and steam loco's by fitting a micro motor, they are 12x6mm dia no bigger than a capacitor and they are silent running. these will fit in a coach or dummy unit thanks to all who read this Bryan 1 Link to post Share on other sites More sharing options...
RAF96 Posted March 20, 2021 Share Posted March 20, 2021 Steam sound uses motor bemf to determine chuff rate and if on load or coasting. Hence if no means of providing bemf then no chuffs. Link to post Share on other sites More sharing options...
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