Anyone out there know the specs. for the power supply (wall wart) for the Yamaha QY-300? The manual does not list the specs. and the machine says only "DC in" with no specs for the Yamaha PA-1207 power adaptor. I lost the original one during a long period of not using the machine, and will order another, but meanwhile would like to use the machine using a "one size fits all" power supply. Need voltage, polarity and capacity in m.amps.