This power supply lets you use common Li-ion or LiPo cells to provide the A & B supplies for battery valve sets with HT in the range of 24-135V and LT of 1.2-2.5V. by Ken Kranz & Nicholas Vinen.Power Supply for Battery-Powered Vintage Radios - December 2020: Outer Front Cover;.Aristocrat slot machine power supply the very old ones you had to operate with a.