I need to purchase a new AC adapter for my admittedly oldish AirPort Base Station (Dual Ethernet). Problem is, I don't know what voltage to feed to the bugger. The required voltage should be on the bottom side of the Base Station, but on mine the markings are no longer legible. (The device does have "markings" all over, though -- those of a rough life. ) I'd be very happy to hear from anyone still owning this Base Station, or someone in the know, what DC voltage this M8209LL/A needs. Thanks!