amperex: 1966 Amperex Bugle Boy 12AX7 ECC83 Tube – Hickok TV7B tests @ 61/59, min: 32/32 – The Audio Board
  • amperex: 1966 Amperex Bugle Boy 12AX7 ECC83 Tube – Hickok TV7B tests @ 61/59, min: 32/32