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Hey 2 Railers.  I have been buying O Scale Locomotives for about 3 years now, but have yet to start a layout.  They all are from about 1985-2010 so have various size can motors.   I plan on running conventional with blocks, not DCC.  When in HO, always used MRC transformers with Blocks, and was very happy.

I have an opportunity to buy a MRC 6000 transformer.  It has 2 modes which are selected with a switch on the back.  Mode 1 0-17.5 VDC  35 VA,  mode 2 0-15VDC 30VA.  The instruction say, Warning: Use mode 1 only for LGB Trains!  So my question does mode 2 supply enough power for lets say a 20 car freight train?  With 3R, some transformers supply 200 Watts or more.  What do you guys use to supply power to home layouts?  Would you buy that transformer or save your money for something with more output?  Could always buy a second and third one to run more trains.

Thanks for your input in advance.

Last edited by MainLine Steam
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I am running the Trainpower 6200, which is 60va split between the DC and AC posts of the transformer.  It will handle a single open frame motor All Nation/Atwater F3(which are door stops being all diecast).  With a pair of powered ones, it will get pretty hot after an hour, but never so hot that it trips out or has an issue.  I plan to use the old Marnold "Marn O Power" transfomer/control station designed for older O scale with 4 or 5 amp output.  Those are rheostat style control and not the best for lower draw can motors.   Look at Bridgewerks, they make high amp DC transfomers for the G scale track powered layouts.  Those will work well on a bigger 2 rail layout that is DC with blocks.  Or MRC did one called the Powermaster G with 10amps of power.   The 6000 or 6200 would work, but might get a bit warm on longer op sessions with long trains.  Obviously you want to be in the high power/LGB mode for O scale trains.  Thats the higher amp mode on both the 6200 and 6000.   I wish MRC did a nice metal case high amp set up back in the day, but they did not.  2.5amp was the limit.  Marnold was 4 or 5 amp.   Many old school 2 rail layouts had home brew throttles back then with a high amp rheostat, Lionel Z or ZW transformer at full throttle and a rectifier to change AC to DC power.  That can still be done today as well.   Parts are easily found on ebay to do that.   The large old school HO club I belonged to for years had a pair of ZW's that powered 5 mainline cabs on a 15x50 layout.  Each cab had its own rectifier circuit, throttle circuit with momentum and brake along with full set of block switches for each of the 3 divisions of the layout.  The same would work in O scale as long as everything is designed for the amp draw and had fuses/breakers in case of a dead short.    Mike

Last edited by artfull dodger

I am running the Trainpower 6200, which is 60va split between the DC and AC posts of the transformer.  It will handle a single open frame motor All Nation/Atwater F3(which are door stops being all diecast).  With a pair of powered ones, it will get pretty hot after an hour, but never so hot that it trips out or has an issue.  I plan to use the old Marnold "Marn O Power" transfomer/control station designed for older O scale with 4 or 5 amp output.  Those are rheostat style control and not the best for lower draw can motors.   Look at Bridgewerks, they make high amp DC transfomers for the G scale track powered layouts.  Those will work well on a bigger 2 rail layout that is DC with blocks.  Or MRC did one called the Powermaster G with 10amps of power.   The 6000 or 6200 would work, but might get a bit warm on longer op sessions with long trains.  Obviously you want to be in the high power/LGB mode for O scale trains.  Thats the higher amp mode on both the 6200 and 6000.   I wish MRC did a nice metal case high amp set up back in the day, but they did not.  2.5amp was the limit.  Marnold was 4 or 5 amp.   Many old school 2 rail layouts had home brew throttles back then with a high amp rheostat, Lionel Z or ZW transformer at full throttle and a rectifier to change AC to DC power.  That can still be done today as well.   Parts are easily found on ebay to do that.   The large old school HO club I belonged to for years had a pair of ZW's that powered 5 mainline cabs on a 15x50 layout.  Each cab had its own rectifier circuit, throttle circuit with momentum and brake along with full set of block switches for each of the 3 divisions of the layout.  The same would work in O scale as long as everything is designed for the amp draw and had fuses/breakers in case of a dead short.    Mike

Thank you very much Mike!  Your reply is greatly appreciated.  It does a fantastic job of answering all my questions about what to do for powering my layout.  It saves me from additional postings when I start actually building my layout.

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
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