(!!!!!) (Best Pair) 5670W GE JAN NOS 1986 (9.5/10.5ma and 9.2/11ma) (Highest mA and Gm)
(!!!!!) (Best Value Pair) 12AU7A GE NOS 1975-1976 (7.2/7.2ma and 7.2/7.6ma)
(!!!!!) (Recommended GE Pair) 6SL7GT GE NOS 1970's series filament - round silver/chrome plates same build (2.1/2.6ma and 2.4/2.8ma)
(!!!!!) (Recommended Single) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's (56/40 and 60/40)
(!!!!) (10 for $22.99) 6AU8 Sylvania NOS
(!!!!) (2nd Best Pair) 6N7 GE metal can NOS 1966-1977 (2.6/2.6ma and 2.7/2.8ma) 1-3% matched
(!!!!) (Best GE Pair) 12SN7GTA GE side getter NOS 1974 (9.4/10.6ma and 9.6/10.6ma) 1-2% matched
(!!!!) (Best Overall Pair) 6N7 GE metal can NOS 1976-1977 (2.8/2.9ma and 2.9/2.9ma) 1-2% matched
(!!!!) (BEST PAIR) 6C4WA GE JAN NOS 1967 (10.2/10.2ma) 1-2% matched (CJ) (smooth and warm)
(!!!!) (Best PAIR) 6X4 SER = LM Ericsson Sweden "D" getter NOS 1950's 1% matched (55/40 and 56/40 x 2 tubes)
(!!!!) (Best Price) 6AU8 Sylvania NOS (4 for $9.99)
(!!!!) (Best Price) 6AU8A RCA NOS (4 for $9.99)
(!!!!) (Best Single from 1978) 5670W GE JAN NOS 1978 (11/13ma) (highest Ma and Gm)
(!!!!) (BEST SINGLE) 12AU7A GE NOS 1960 copper grid posts (11.4/11.6ma) 1-2% section balance
(!!!!) (Best Sound for the money Pair) EL84 Australia NOS original boxes early 1960's same build (45.5ma and 44ma) (same internal build and sound to EL84 Holland)
(!!!!) (Best Value Pair - warm and smooth) 6680=12AU7A GE NOS 1970's 1-2% matched (8/8ma and 7.7/7.9ma)
(!!!!) (Best Value Pair) 5U4GB GE NOS 1960's (58-60/40 and 60-60/40)
(!!!!) (Best Value Pair) 6021=CV3986 Mullard UK Whyteleafe plant NOS 1972 original boxes (4.4/7.0ma and 4.8/6.0ma)
(!!!!) (Best Value Pair) 6BQ5 Sylvania used/good 1970 era (41ma and 46ma)
(!!!!) (Best Value Pair) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1966 (12.2/12.6ma and 8.5/8.5ma) (6BL8 SUB)
