A 12vdc power supply commonly used to power mobile gear on an in-home test bench. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
Jim's not only a t00b phaerie he's also an amateur radio enthusiast.
I owuld suggest he's likely had more than a bit of experience using a 'bench supply' on various equipment.