Transistor

If you are referring to a cylindrical part with several colored bands encircling it, that would be a resistor, not a transistor. Some other failure in the unit, possibly the rectifier tube itself, caused excessive current to flow through it. I doubt that your ac power has anything to do with the problem.

Presumably in order to get the unit working the manufacturer will have to find and fix that other failure in addition to replacing the resistor. Or if the underlying failure was the rectifier tube, which you have already replaced, then just replacing the resistor will be all that is necessary.

Regards,
-- Al

Thanks Al. I am quite ignorant about such matters. I hope you are right and the replacement of the "resistor" will be all that is needed.