[codefox1]

For a quarter you can get a pair of diodes to perform as rectifiers, and if really needed spend another dollar to tame the B+, and leave the old 6X5 disconnected except for heater burning forever, or remove connections entirely to spare the unneccessary load to the power transformer. The radio won't care, and provided you have replaced properly the capacitors and anything else in the voltage tree, you are just about there! I'd add an appropriate fuse as well if it were to be in my home.