[Guest]

Ok. I was going by the following instructions from antiqueradio.org

"A dim-bulb tester can be used to diagnose some basic power supply problems. Here is a handy procedure which I found in an old radio service book. It is used to check the transformer and input filter capacitor in a transformer-type power supply. (This will not work with an "AC/DC" type power supply, which lacks a power transformer.)

Remove all tubes from the radio. Make a note of where each tube belongs, so you can later replace it in the correct socket.
Place a 25-watt or 40-watt bulb in the dim-bulb tester and plug the radio into the tester.
A good transformer will cause the lamp to glow dimly after a few moments. If the lamp glows brightly, you have a short circuit; the transformer should then be disconnected and checked.
If the transformer is OK, put in the rectifier tube, put a 100-watt bulb in the dim-bulb tester, and try again. If the rectifier tube lights up and the lamp glows brightly, you have a short-circuit in the filter capacitor of the power supply."