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Decoders and MDC Roundhouse steam locomotives.
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Help!! I have installed a digitrax DH123 decoder in my brand new MDC ten wheeler. This is a newer version of MDC's products, but not the newest. It still has the brass tender wheels and tires on the drivers, but came with a Sagami Can motor. The motor has been isolated and I have improved electrical pick-up on the tender. The track is clean, the wheels are clean, <br />1). The loco runs o.k with straight DC power, and DC power through the decoder but is a little jerky. <br />2). The loco is very jerky and eventually will bog down and stop in DCC and runs a little better in reverse, but is still jerky. <br />3). I have done modifications to CVs, per Tech Help at Digitrax. We improved start voltage so the loco begins moving at lower throttle settings. <br />4). I have swapped decoders, using the original and two others, changing the new decoders CVs to copy setting suggested by Digitrax, no improvement! <br />5). I have replaced the can motor with an open frame motor and noticed no improvement. <br />6). I have asked MDC for their thoughts. <br />NOTES: When running DC, start voltage appears to be around 5 volts and top end volts are around 21! <br /> <br />Have any of you built MDC steamers and been successful in converting to DCC? I think MDC has again changed motors and provided flywheels. It's my understanding the wheels are nickle plated now also. <br /> <br />Any suggestions would be appreciated! <br />
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