Note that the power cord has NOT been replaced. Four of the seven tubes were replaced with NOS ones: 2x 12BA6, 1x 12AU6, 1x 19T8, the others (12BA6, 12AT7, 35B5) tested good. The radio has been tested for 12 hours. Note that this radio meets the electrical safety standards of the early fifties, it does NOT meet today's electrical safety standards. No electrical circuit changes have been made, it's s still per the original schematics (see photo 8).