Uses 5U4GB tube rectifier to more closely match correct B+ voltages with today's power voltage (rated for 480v B+; original rectifier tube gave 525V, but 5U4GB gives 495v -well within tolerance). D Driver board fully re-capped.Uses GE 42Lpoly caps and 500v mica caps throughout. All resistors checked- any out-of-tolerance resistors replaced with matched pairs (matched amp-to-amp). All solder joints inspected and re-flowed as needed, to insure proper connection quality. E All transformers thoroughly tested (all meet spec). F Input jacks replaced with machined RCA jacks. G New polished stainless-steel bottom covers, made to exact original dimensional specs (Dynakit replacement parts). The item "Mk III mono-block 60watt vacuum tube amplifiers (Set of two) -120Watts total" is in sale since Saturday, August 15, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps". The seller is "swamphippie" and is located in Saint Simons Island, Georgia. This item can be shipped to United States.