hummmm,i bought a 12b and had a new cord put on ,it works great,,,hooked it to my af ogauge loop,all orig af o track ,,,had trouble with some loco,took it to the motor guy here (ace's train crossing),they seemed to work fine,,,last night wanted to run another steam ,very sluggest,thought hummm whats up,,,hook the volt meter to the 12b,,,puts out 15 volts,,,i have feeds all over also,ok got out the trusty zw,,which puts out 20volts,,,,seems as tho the prewar engines like the extra 5 volts,i was abit surprised but ,if it now works,,dont fix it,,,but I do like the looks of the 12b,t
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