In message , Brian Watson writes
Aristocraft Train Engineer. This has the advantage of being a radio-control handset controlling a base station which is the equivalent of your normal controller.*Warning* It's expensive, at approx £125, and you'll need £40 of Gaugemaster transformer to drive it.
Use heavy-duty wire to connect the track. I use 6 amp lighting cable. My layout goes 175 feet (55 metres) away from the control point.
Yes. How many trains are you going to run at once? The Train Engineer will handle 5 amps (or 10 amps if you fit a fan to cool it) and normal OO locomotives don't draw more than 1 amp in normal conditions.