I'll second that! I've found that, given a house line voltage of from
120-127 volts, many of my older receivers used to get very hot. I
installed a 7A Variac on the line dedicated to the BA'a and set it for
110v. No more problems.. at all.

Another problem
is today's higher line voltages. Most of these old radios are designed
for 115 or 117 volts and when operated on 123-125 volts the B+ will be
15 or 20 volts higher than normal (115 VAC operation).
Best Regards,

Ed