(!!!) (Best Overall Pair) 12DQ6B Philco by Sylvania NOS 1960”s (81ma and 82ma) 1-3% matched

1 pair) 12DQ6B Sylvania NOS original boxes 1960”s

1 tube) 81ma Gm=8100

1 tube) 82ma Gm=8200

Good Ma range 55-65ma

Good Gm range 6500-7000

12DQ6B=12GW6