09-13-2014, 04:11 PM
You have to remember that something else in the radio could have ruined the tube. After all it worked at first. Like PARadiogeek suggested you should replace all components and bad wiring before powering up again, if not you might be looking for a new transformer soon if not more. The dim light bilb/variac is essential, but everything needs to be repaired as well as you can even before using it.