A quick question to the masses. I have a radio for my 65 Belvedere on the bench. Short of dragging it and speakers out under the hood of my truck to hook it to the battery, what could I use as a power supply on the work bench to see if it works? In the past I used a battery charger to test the guages in my instrument cluster when I refurbished it. Any suggestions? Mike P. 1965 Belvedere Convertible