For Sale: Elenco Model XP-581 Quad Power Supply. Great bench supply to have when building, testing and powering circuits. The power supply has 4 independent supplies, a regulated variable power supply that is adjustable from +2.5 volts to +20 VDC, and three fixed DC supplies: one +12V at 1 amp, one -12V at 1Amp, and one +5V at 3 Amps. The power supply is in very nice condition and works great. It comes with the manual and schematic on CD. $70 plus $15 for shipping to the lower 48 states.For Sale: