Congratulations on the radio find. That radio uses miniature tubes and doesn't use a whole lot of power. You could easily use a small battery charger that is good for about 6 to 8 amps. If it were mine, I would not power it up until all the "wax" or paper capacitors are replaced, but that is your call. I would replace the electrolytics in the can and purchase a solid state vibrator for it. Good luck and don't be shy about asking questions here.
Fred
