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(!!!!) (Best GE Single #1) 6U8A GE NOS 1980 (18.4/10.6ma)
(!!!!) (Best GE Single #2) 6U8A GE NOS "U" getter 1961 (17/9ma)
(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (16.2/8.5ma and 16.5/8.6ma) 1-3% matched
(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (16.8/8.6ma and 17.5/8.5ma) 1-3% matched
(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (19.0/9.8ma and 18.4/10ma) 1-3% matched (Copy)
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania JAN NOS 1986 (16,8/9.0ma and 16.8/9.4ma)
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania NOS 1986 (20.5/8.2ma and 20.0/8.0ma)
(!!!!) (Best Pair) 6U8A Philips by Sylvania NOS 1986 (14/10ma and 14.2/9.6ma)
(!!!!) (Best Value Pair) 6U8A GE NOS 1965-1968 (12/7ma and 12/7.4ma)
(!!!!) (Single) 6U8A GE NOS 1977 (15ma/9.4ma)
(!!!) (Best Single) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!) (Recommended Single) 6U8A GE Amperex NOS 1974 (13.5ma/10.2ma)
(!!) (Recommended Single) 6U8A GE NOS 1977 (14.2ma/10ma)
(!!) (Single) ECF82=6U8 Toshiba Japan branded Telefunken NOS 1964 (14.2ma triode and 9ma pentode)
(!!) (Single) ECF82=6U8 Toshiba Japan branded Telefunken NOS 1964 (17ma triode and 8.2ma pentode)
(!!) 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 SINGLE) 6U8A Sylvania NOS 1970 era (20ma/17ma)
(!) (Recommended SINGLE) 6U8A Sylvania NOS 1960's (19.8ma/10.6ma)
