Russell
Isn't the resistance causing the IR drop coming from the track itself which can be overcome by connecting additional properly sized wire runs at strategic places where the voltage is low?
If the train consist[s] were overloading the transformer it should trip unless it has a faulty breaker. Ten amps or 180 watts is the maximum any O-gauge transformer produces per throttle or in total by a pw ZW which he uses, unless you parallel Power House bricks through a TPC.
