james john_gudgeon Posted September 22, 2019 Share Posted September 22, 2019 HiI have recently fitted a TTS class 37 decoder to a VI trains class 37 with a digitrax SP26158B box speaker. The problem is that when applying power using the Elite controller the locomotive judders in both directions before sttting off when more power is applied. I would appreciate any advice on correcting this problemRegardsJim Gudgeon Link to comment Share on other sites More sharing options...
Bulver Posted September 22, 2019 Share Posted September 22, 2019 Hi Jim,i fitted a class 47 TTS decoder to a viTrains model, and experienced the same problems. I think that I found a resolution to this in amending CVs, but unfortunately I can’t trace the ref. at present. I will have a look and report backRod Link to comment Share on other sites More sharing options...
Howbi Posted September 22, 2019 Share Posted September 22, 2019 The usual solution is to change CV150 to a value of 1 (default is 0). This uses an alternative algorithm for better low speed control. Further details are described in the TTS instructions............HB Link to comment Share on other sites More sharing options...
ColinB Posted September 22, 2019 Share Posted September 22, 2019 Great, my Bachmann class 37 does exactly the same with the TTS decoder. At least it is consistant. Link to comment Share on other sites More sharing options...
Bulver Posted September 22, 2019 Share Posted September 22, 2019 Thanks, HB, I knew there was a cv change, but have been unable to locate the info.. I am sure the solution you mentioned was the one I used, to ‘reasonable’ result.Rod Link to comment Share on other sites More sharing options...
james john_gudgeon Posted September 22, 2019 Author Share Posted September 22, 2019 Hi The issue with the shuddering start with the VI trains class 37 has been fixed by changing CV 150 to 1 as was the fix for the same problem with the Hornby class 50Thank youJim Gudgeon Link to comment Share on other sites More sharing options...
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