(!!!!) (Best Pair) 6U8A=6678 GE NOS 1968 same date codes (14.0/14.2ma and 12.2/12.8ma) 1-3% matched
(!!!!) (Best Sylvania Pair) 6U8A Sylvania NOS 1970 era (17.0/16.4ma and 10.2/10.4ma)
(!!!!) (Oldest Pair) 6U8A GE NOS 1962 (19.2/16.8ma and 11.8/10.5ma) (Close Gm)
(!!!!) (Recommended Pair) 6U8A GE NOS 1973-1976 (19/18.8ma and 10/9.8ma)
(!!!!) (Recommended Pair) 6U8A GE NOS 1974-1977 (17.2/17.8ma and 8.6/8.4ma) 1-3% matched
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (15.5/16.0ma and 8.4/8.0ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (16.4/16.8ma and 9.2/9.2ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (17.2/17.6ma and 8.4/8.6ma)
(!!!) (Best Single) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!!) 6U8A Raytheon black plates NOS "U" getter halo 1962 (17ma and 8ma)
(!!) (Recommended Single) 6U8A GE Amperex NOS 1974 (13.5ma/10.2ma)
(!!) (Recommended Single) 6U8A GE NOS 1977 (14.2ma/10ma)
(!!) 6U8=ECF82 Tungsram Hungary rebranded Haltron NOS 1970's (14.3ma and 7.6ma)
(!!) 6U8A Westinghouse NOS 1967 (17.8ma and 9.5ma)
(!!) 6U8A Westinghouse NOS 1967 (24ma and 7.5ma)
(Best Value) 6U8A Rogers Canada NOS 1974 (14.8ma triode and 8ma pentode)
6U8A used/good
