catflap Posted February 12, 2010 Share Posted February 12, 2010 I have just fitted a Lenz 1024 decoder to a Hornby NRM Scotsman (a pig of a job) but have discovered that whereas it ran freely prior to conversion it now hunts; particularly going down hill. I guess this is some gremlins with the back EMF - should I have removed the capacitor that is fitted in this loco? Or give in and buy a new Hornby decoder? Cheers Richard Link to post Share on other sites More sharing options...
craigwelsh Posted February 12, 2010 Share Posted February 12, 2010 Have you tried it with Back-emf on and off? Some locos don't like it. The 1024 is such an old chip it doesn't have the '1 size fits all' quality of the later standard,silver and gold range. I used to find certain locos didn't like the ones I had and they needed tweaking. Snipping the cap may make a difference too as I know i got runaways even sometimes on the older Lenz chips with them in. Link to post Share on other sites More sharing options...
catflap Posted February 12, 2010 Author Share Posted February 12, 2010 Nope -made it worse! I'll have to take the decoder out and run it on DC to see if I have accidentally made something stiff.? Link to post Share on other sites More sharing options...
craigwelsh Posted February 12, 2010 Share Posted February 12, 2010 Nope -made it worse! I'll have to take the decoder out and run it on DC to see if I have accidentally made something stiff.???? It does sound possibly mechanical if its worse without back-emf, that enabled would hide mechanical stiffness a bit. Not sure what you could have done to cause a quartering issue etc though fitting a decoder! Link to post Share on other sites More sharing options...
catflap Posted February 13, 2010 Author Share Posted February 13, 2010 Sorted! put in a TCS T1 ! Link to post Share on other sites More sharing options...
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