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I have heard and read this misconception before among new DCC users or those new to model railroading and considering dcc. In most DCC systems, the control unit and the power supply are TWO seperate items. For instance the MRC Command 2000 is just the DCC control system. It does NOT have its own power supply. It needs a seperate power supply. <br />And if memory serves me correctly. the MRC Prodigy system also needs its own seperate power supply. And you can't use a power pack that comes with a train set. Just doesn't have enough amperage. 5 amps is a minimum for good operation, expecially if you are running more than 2 or 3 engines at a time. Even if not, I would still go with a 5 amp power supply for future use. <br />Hope this clears up a bit of confusion among new DCC users. <br />John
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