amperex: 1964 Amperex Bugle Boy 12AX7 ECC83 Tube – Hickok TV7B tests @ 50/44, min: 32/32 – The Audio Board
  • amperex: 1964 Amperex Bugle Boy 12AX7 ECC83 Tube – Hickok TV7B tests @ 50/44, min: 32/32