Here is a nice looking regulated power supply to power your farm tube radio. This unit has a regulated 2 volt output and a regulated 90 volt output. This powers supply will power up your old 1940s battery operated farm radio. I have sold several of these beauties and everyone has been very satisfied. They have an on/off switch in the cord and there is an LED that lights when the power is on. It will fit in the back of the cabinet just like a battery. Give it a good home. It measures about 7" X 2 1/2" X 3".