(!!!!) (Recommended Pair) EL34 Mullard branded Philips and GE NOS XF4 1977-1979 (99ma and 101.5ma)
(!!!!) (Recommended Pair) EL34 Winged C SED Russian NEW 2002 (93.5/95.3ma)
(!!!!) (Recommended Pair) EL34 Winged C SED Russian NEW 2005 (97.0/99.2ma)
(!!!!) (Recommended Pair) EL84 Telefunken Germany <> bottom NOS 1963-1966 (68ma and 69.5ma) (recommended for FIXED-BIAS amp only due to high current)
(!!!!) (Recommended RCA Single) 6V6G RCA branded Haltron coated glass NOS 1940's (42ma)
(!!!!) (Recommended Single) 2A3 RCA gray plates NOS 1960 (104ma)
(!!!!) (Recommended Single) 6L6GC RCA black plates branded Westinghouse like new double "D" getters 1960 era (72ma)
(!!!!) (Recommended Single) 6V6G Sylvania branded Haltron coated glass NOS 1940's (50ma)
(!!!!) (Recommended used pair) 5881 Tungsol used/good 1960's (63.2ma and 66ma)
(!!!!) (Recommended Used Pair) 6550C Svetlana Russian used/good 1997-2000 (135ma and 136ma) ** (1-3% matched)
(!!!!) (Recommended XF2 Pair) EL34 Mullard XF2 NOS (1 tube) double halo "O-O" (1 tube) single halo "O" 1967-1968 (90.5ma and 92.8ma)
(!!!!) (Single) 10 Sylvania "engraved base" 1930's NOS (29ma)
(!!!!) (Single) 6L6GC=6n3CE Russian NOS 1990 coin/wafer base (75.6ma)
(!!!!) (Single) 6V6GT Sylvania coated glass NOS 1956 (34.2ma)
(!!!!) (SINGLE) 7581A GE tan base NOS 1965 (62ma)
(!!!!) (Used Pair) 6550C Winged C by Svetlana Russian used/good 2000-2001 faded top getters (116ma and 120ma) (same Gm) **
(!!!!) (~ Recommended Pair ~) JEA-6094 Bendix NOS 1961 and 1967 same build (54ma and 55.2ma)
(!!!!) 6336A Tungsol branded Heintz and Kaufman 1960's (62/76ma) ***
(!!!!) 6973 RCA gray plate NOS 1975 (43ma)
(!!!!) 6V6G Mullard branded Haltron England NOS gray coated glass 1940's (45.5ma)
