Reply to "Motors in new MTH locos vs Motors in older MTH locos"

BlueComet400OGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

@700E posted:
This quote in reference to 5-Volt PS2 boards "chuffing in neutral" is from the MTH Service Notes. I wonder whether the problem has come back from the dead.
PS2 Steam Chuffing in Neutral
We have found that some models exhibit chuffing in neutral. To eliminate this problem place a 10K
ohm resistor in line with the orange wire going to the tach reader. This applies to 5 volt Ps2
equipped models only. The 3 volt Ps2 Board has the 10K ohm resistor on the board.

Would this account for the fact that the loco doesn't start to roll until I advance it to 5 mph, and at that point it lurches backward, rolls about a foot, then stops again?

12/13/2211:15 AM

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