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(!!!!!) (Best Overall Single #1) ECF80=6BL8 Telefunken Germany NOS 1971 (14.0/11.5ma) (Highest mA and Gm)
(!!!!!) (Best Pair #2) ECF80=6BL8 Telefunken Germany <> bottom NOS 1960-1963 (13.6/7.5ma and 12.4/8ma) (best sound)
(!!!!!) (Best Pair) ECC801S=12AT7 Telefunken Germany <> bottom NOS triple mica 1962 and 1970 (8.2/8.0mA and 8.3/8.6mA) (1-3% matched)
(!!!!!) (Best Single #3) ECC83=12AX7 Telefunken Germany ribbed plates used/tests like new 1953-1955 (1.3/1.1ma and Gm=1700/1600) 1-5% section balance
(!!!!!) (Best Single 1959) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates NOS 1959 (1.1/1.0ma and Gm=1700/1600) 1-3% section balance
(!!!!!) (Best Single 1967) 12AX7=ECC83 Telefunken Germany <> bottom smooth plates NOS 1967 partially faded printing (1.2/1.5ma and Gm=1600/1800) (EAR, Manley, AKG)
(!!!!!) (Best Single) ECC801S=12AT7 Telefunken Germany <> bottom NOS 1966 (10.8/9.8ma)
(!!!!!) (Best Value Pair) 12AT7=ECC81 Telefunken Germany Diamond Bottom <> used/good 1960's (7.6/6.2ma and 6.2/7.2ma)
(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma) (strong Gm)
(!!!!!) (Recommended Single) ECC83=12AX7 Telefunken Germany <> bottom smooth plates NOS 1969 (1.1/1.0ma and Gm=1700/1600) 1-3% section balance
(!!!!) (2nd Best Single) ECL86=6GW8 Siemens Halske branded Telefunken Germany NOS 1971 (1.1/36.5ma)
(!!!!) (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 Holland Single) EZ80=6V4 Philips Miniwatt Sittard Holland large "D" getter NOS 1957 (64/40 and 64/40)
(!!!!) (Best Overall Pair) EC92=6AB4 Telefunken Germany <> bottom NOS 1965 same date codes (9.2/9.5ma) (mic)
(!!!!) (Best Overall Single) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (10ma)
(!!!!) (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 #1) ECC802S=12AU7 Telefunken Germany <> bottom NOS 1964-1967 1-2% matched (10.4/1.6ma and 10.2/10.4ma) (same Gm) (best sound)
