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I went outside to my garden railway (the 350 or so feet of track I have in place) and connected my power supply as usual, but my USA Trains SD40-2 with Sierra Sound would not run properly when I hooked up my power pack. It would not let me go further than half throttle without stopping and I would have to bring the throttle down again. It only happens in one direction and the other direction works fine (the left works fine and the right doesn't). I am using an MRC Control Master 20 with the tethered walk around cable. I have not had trouble with it since I bought it in January. The nudge/pulse mode is off and it is set to G scale. It works the same if the sound system is on or off, but when the sound is turned on, when it gets going to half throttle or more, it will cut out for a second and then suddenly act as if it just turned on. The only thing that changed since it worked fine was that I added another 75 feet of track on my mainline. There are no shorts or anything the would cause a short, and the power pack is connected directly to the track due to my usual electrical control panel not working for some reason. Nothing has changed with the electrical system except that I replaced a few sections of track in preparation for converting to DCC. It does not matter what direction the engine is facing or which wire is connected to which side of the track. The same problem occurred with my Kalamazoo 0-4-0. This problem is baffling me and I would appreciate any ideas or suggestions so that I can use my railway a bit before my schedule gets busy again in two weeks.
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