NorthBritish Posted March 8, 2020 Share Posted March 8, 2020 Hi, I've got a Gaugemaster Prodigy Advanced 2 Wireless system with the Gaugemaster 8amp booster. The main unit is on one district and the 2nd district uses the 8amp booster. I've recently bought a class 52 Western 'Western Enterprise' from Cheltenham Model Centre and noticed the locomotive dramically changes speed when it moves into the booster district. None of my other locomotives, including Dapol class 22's do this. I have a large number of sounded locomotives spread across the two districts. The speed changed and sound of the motor is quite significant and needs to be resolved. I haven't spoken to Gaugemaster or Dapol/Cheltenham Model Centre yet as I thought I would ask on here and see if anybody else has had this problem. Why would only the new loco be affected? Cheers, Simon Link to post Share on other sites More sharing options...
srihaggis Posted March 8, 2020 Share Posted March 8, 2020 Have you tried taking a decoder out of one of your locos that are not affected by this issue and put it into the Dapol 52, just to make sure it's not the decoder doing it? 1 Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted March 9, 2020 Share Posted March 9, 2020 This has to be interaction between the different loco decoders and the DCC system components. As already suggested, if possible exchange with one of the decoders in a model not showing the speed change, to test whether the problem travels with the decoders. I would expect Gaugemaster would want the decoder identities if they were to look into it. Link to post Share on other sites More sharing options...
arff999 Posted March 9, 2020 Share Posted March 9, 2020 Try giving the decoder the CV 8-8 reset just in case it has become corrupted in any way. Its worth a try. John. Link to post Share on other sites More sharing options...
NorthBritish Posted March 9, 2020 Author Share Posted March 9, 2020 Hi, The decoder I fitted is non sound and think it is a Hornby Sapphire. It was fitted to a Dapol class 22 and don't believe that gave any problems, but I will put the decoder into another model and see if the problem persists. If it does occur then I will make Gaugemaster my first point of call. Cheers, Simon Link to post Share on other sites More sharing options...
Crosland Posted March 9, 2020 Share Posted March 9, 2020 Is this the only non-sound decoder, or the only one of a particular make? It sounds like the power supply voltages are different to the two power districts, or the voltage drop in the PA2 and the booster are different, resulting in a lower track voltage, and the new decoder is less sophisticated at keeping a constant speed. Might be worth investigating any BEMF settings. Link to post Share on other sites More sharing options...
NorthBritish Posted March 12, 2020 Author Share Posted March 12, 2020 Hi, I've tried several different non sounded decoders including Gaugemaster and none have solved the problem. It is possible that some other locomotives could be doing it, but it's not very obvious if that is the situation. The track voltage appears to be the same when I checked it with a meter, assuming that the meter is sensitive enough to give a different reading? I had the meter set for 20v AC. Since multiple decoders are giving the same problem I don't believe it will be a corruption issue. I've rung Gaugemaster and they are a little stuck at the moment on what to suggest. Cheers, Simon Link to post Share on other sites More sharing options...
RMweb Premium Izzy Posted March 12, 2020 RMweb Premium Share Posted March 12, 2020 Can you use your sound fitted locos with the sound turned off to see if this makes it more obvious - being able to hear the motors speed change - whether they are affected or not in the same way? That might help to narrow down the problem to either a voltage difference in the two districts, or something to do with the class 52. Izzy Link to post Share on other sites More sharing options...
NIK Posted March 12, 2020 Share Posted March 12, 2020 3 hours ago, NorthBritish said: Hi, I've tried several different non sounded decoders including Gaugemaster and none have solved the problem. It is possible that some other locomotives could be doing it, but it's not very obvious if that is the situation. The track voltage appears to be the same when I checked it with a meter, assuming that the meter is sensitive enough to give a different reading? I had the meter set for 20v AC. Since multiple decoders are giving the same problem I don't believe it will be a corruption issue. I've rung Gaugemaster and they are a little stuck at the moment on what to suggest. Cheers, Simon Hi, It may be there is a medium rather than a low resistance in the wiring associated with one power district. The OO Dapol models I've measured have the second highest current draw (Heljan being the thirstiest). Regards Nick Link to post Share on other sites More sharing options...
RMweb Premium spamcan61 Posted March 12, 2020 RMweb Premium Share Posted March 12, 2020 (edited) I'd remove all other locos from the track and see if it still does it. Edited March 12, 2020 by spamcan61 Link to post Share on other sites More sharing options...
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