Question about MRC Throttlepack Ac 80w Transformer Power 0001301 1301

1 Answer

Voltage will not drop down to 0 volts.It runs beteen 14 thru 24 volts,not 0 thru 24 volts.

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  • craig remboldt Mar 13, 2011

    The train takes off,like a bat out of hell,while the throttle lever is on 0.You have to use the on/off switch,to stop the train.The miltimeter shows a steady flow of volts.On 0,it reads 14 volts,turn it up to the max,she reads 24 volts.Hit the boost botton,she reads 25.5 volts.The train,I`m using is a 1957 thru 1961 Lionel 246 Scout.This pack should run this train,according to MRC.

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It is not supposed to drop to 0 volts. It is a pulse width modulated supply designed to limit speed by decreasing the "on time" of the voltage, not the level of voltage.

Posted on Mar 13, 2011

  • 1 more comment 
  • Dave  C
    Dave C Mar 14, 2011

    There may be something about the older motor that is not compatible with the PWM output, but I would have also thought it should be fine. Do you have the option of returning the supply or trying it on a newer layout?

  • Dave  C
    Dave C Mar 14, 2011

    A pwm controller will not appear to go to 0 volts on a meter. You'll need an oscilloscope to see the changing pulse width.

  • Joe Addeo Dec 27, 2011

    Dave - I just had the same thing happen to my Throttlepack. I'm using a very new MTH Subway model engine. It was working fine, and then all of a sudden I turned on the power switch and the train took off with the Throttle at zero. Have you been able to solve the problem? - Joe

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