? about MRC 275 watt transformer, (or any o-scale transformer that can run 2 trains.

Discussion in 'G / O / S Scale Model Trains' started by ozzy, Nov 29, 2007.

  1. ozzy

    ozzy Active Member

    when a transformer says its 275 watts , it that 275 watts to each track, or is the 275 watts divided by 2? or 137watts to each track?
  2. spankybird

    spankybird OTTS Founder

    275 is divided by 2 = 137 watts per tack, if you are using 2 tracks. If only one train or side is being used, then 275 for that one track.

    Now comes the question if the 275 is input power or output power. The old Lionel ZW is 275 watts input power and only 180 watts output to the tracks.

    The new Z4000 is 400 watts output.
  3. ozzy

    ozzy Active Member

    and what about the accessory side of transformers? dont that take some of the power/watts from the 275?
  4. ozzy

    ozzy Active Member

    all i can find is this, looks like its 270 to the track.

    MRC announces awesome power and advanced sine wave technology for AC trains - the Pure Power Dual Control. Each side of MRC’s new AC transformer offers 7 amps of power and 0~21 VAC of smooth, realistic variable control. Just like the Pure Power single but with twice the output, the Pure Power Dual Control runs all AC powered trains and their sound systems.

    Big, comfortable throttle control makes you feel like you’re behind a real locomotive. Each throttle has its own separate amp meter and voltmeter so you can monitor your layout conditions.

    The Pure Power Dual features 14-volt AC terminals for accessories, and a power indicator light. Bell and whistle/horn buttons are available for each control. The Pure Power Dual provides over 270 watts to the track. And with its rugged retro looks, it makes for an attractive addition to your layout.

    Check it out and you’ll be impressed at just how affordable it is.


    • Retro good looks
    • 270 watts of power
    • 0~21 volts variable AC for train operation on each throttle handle
    • 4 meters (2 volt and 2 amp) for monitoring layout conditions and programming some sound equipped locomotives
    • Horn/whistle, bell and direction buttons for each throttle
    • Fixed 14-volt AC output terminals for accessories
    • Master on-off switch and pilot light
  5. 60103

    60103 Pooh Bah

    I think you should take the 275 as the maximum load on the wall plug. It could go all to one output (accessory or track) or be divided among them. Plus a bit of loss in the transformer to keep your hands warm.
  6. spankybird

    spankybird OTTS Founder

    As I recall, the New MRC is 270 watts output with a pure sine wave ( which is very good). :thumb:

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