(!!!) (Best GE Single) 6EU7 GE NOS pinched gray plates 1975 (56/32 and 58/32)
(!!!) (BEST PAIR #2) 6AU5GT GE gray plates NOS 1960's (66.5ma and 65ma)
(!!!) (Best Pair #2) JG-6021A GE NOS 1956-1957 "D" getter (5/6ma and 5.6/6.1ma) (mil-grade)
(!!!) (Best pair #3) 12AU7A GE NOS 1958-1965 (10/10.6 and 10/11.6ma) (close Gm)
(!!!) (Best Pair #3) 6GU7 RCA NOS 1970-1971 (10/13ma and 11/12ma)
(!!!) (Best Pair #3) JG-6021A GE NOS 1956-1957 "D" getter (5.1/5.1ma and 4.8/5.2ma) (mil-grade)
(!!!) (BEST PAIR) 12AL5 Tungsol NOS 1960 (48-48/40 and 48-48/40)
(!!!) (Best Pair) 12B4A GE NOS 1960's (47ma and 48ma)
(!!!) (Best Pair) 12B4A GE NOS 1962-1977 same build (52ma and 53ma)
(!!!) (Best Pair) 12BY7A GE NOS 1970 (35ma and 35.5ma)
(!!!) (Best Pair) 5U4GA Raytheon double "D" getters NOS 1956 (57-60/40 and 59-60/40)
(!!!) (BEST PAIR) 6463 GE NOS 1965 (16.4/16.5ma and 16.8/17.8ma) (same pinout as 6350)
(!!!) (BEST PAIR) 6463 GE NOS 1966 (16.8/21ma and 17.6/21.5ma) (Highest mA and Gm)
(!!!) (Best Pair) 6663=6AL5 Tungsol NOS 1950's (48-48/40 and 48-49/40)
(!!!) (BEST PAIR) 6AU5GT GE gray plates NOS 1960's (75ma and 74ma)
(!!!) (Best Pair) 6BQ7A GE black plates "U" getter NOS 1957 (12.8/12.2ma and 11.0/11.6ma) (Highest mA and Gm)
(!!!) (Best Pair) 6BX7GT GE "D" getter NOS 1954-1956 - 1 tube branded Raytheon (53ma/50ma and 47/52ma)
(!!!) (Best Pair) 6FQ7 GE NOS 1970's (9.8/8.8ma and 8.5/9.6ma) (close Gm)
(!!!) (BEST PAIR) 6JB6A RCA branded GE NOS 1960's (80ma and 86ma)
(!!!) (BEST PAIR) 6K6GT Sylvania coated glass NOS 1940's (1) branded Philco (44ma and 44.6ma)
