amperex: 1970 Amperex Orange Globe 12AX7A ECC83 Tube-Hickok TV7B tests@ 52/52, min: 32/32 – The Audio Board
  • amperex: 1970 Amperex Orange Globe 12AX7A ECC83 Tube-Hickok TV7B tests@ 52/52, min: 32/32