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(!!!!!) (Best Overall Pair) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (11.6/11.4ma and 11.8/10.6ma) (same Gm) (best sound)
(!!!!!) (Best Overall Pair) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (12.6/11ma and 12.0/10.8ma) 1-5% matched (Highest mA and Gm) (best sound)
(!!!!!) (Best Pair #1) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (11.2/10ma and 11.2/9ma) (best sound)
(!!!!!) (Best Pair #2) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (11.5/9.6ma and 12.2/9.5ma) (best sound) 1-3% matched
(!!!!!) (Best Pair #2) ECF80=6BL8 Telefunken Germany <> bottom NOS 1971 (12.8/8.8ma and 11.7/9.0ma) (best sound)
(!!!!!) (Best Pair #3) EF86 Valvo Germany branded PHILIPS and POPE NOS 1970 (3.6ma/4.0ma)
(!!!!!) (Best Pair) EF86 Siemens Germany made by Valvo (Hamburg) NOS 1965 (3.4ma/3.4ma) 1-2% matched
(!!!!!) (Oldest Pair 1950's) ECC82=12AU7 Telefunken Diamond Bottom <> ribbed plates NOS 1955-1959 very good printing (9.2/9.0ma and 9.4/9.6ma)
(!!!!) (Best Pair #2) 12AU7 Philips Holland NOS 1971-1972 dimpled disc halo (10.2/10.6ma and 11.2/11.6ma)
(!!!!) (Best Siemens Pair) EL84 Siemens Halske Germany used/test like new 1971 (48.2ma and 48.5ma) (High Gm)
(!!!!) (Best Single) E88CC=6922 Philips SQ Holland gold pins NOS 1973 (14.6/14.8ma) 1-3% section balance
(!!!!) (Best Value Single) E88CC=6922 Mullard SQ Holland used/good 1966 (11.0/11.4ma) (3D MIDS, low noise, sweet sound) (same Gm)
(!!!!) (Single) E88CC=6922 Mullard Holland SQ used/good 1965 (10.2/9.5ma) (3D MIDS) (Good Gm)
(!!!!) 6336A Tungsol branded Heintz and Kaufman 1960's (62/76ma) ***
(!!!) (Best Pair) 6AQ5A RCA black plate NOS 1966-1967 (48.5ma and 48ma)
(!!!) (Best Siemens Pair) EL84 Siemens Halske Germany 1966-1969 (40ma and 42.5ma)
(!!!) (Good Value) 6021=CV3986 Mullard UK Mitcham plant NOS 1971 (4.2/4.4ma and 4.2/4.4ma)
(!!!) (Pair 1950's) 807 RCA black plate NOS 1956-1959 in white boxes (60.5ma and 61.2ma) (same Gm)
(!!!) (Recommended Pair) 6005W Sylvania JAN black plate clear glass NOS 1971-1979 (53.0ma and 54.6ma)
(!!!) (Recommended Pair) ECC85=6AQ8 RCA Heerlen Holland NOS 1968 (21/16.5ma and 18.5/15.5ma) (close Gm)
