(!!!!!) (2nd Best Telefunken Pair) 12AU7=ECC82 Telefunken Germany smooth plates NOS 1966 and 1972 1-3% matched (9.6/10.6ma and 10.2/10.8ma)
(!!!!!) (2nd Best Tungsol Single) 6550 Tungsol black plate NOS 1957 (125ma) (Recommended for Audio Research power supply)
(!!!!!) (Best "D" getter Single) USN-6922 Amperex USA Gold Pins with curved "D" getter halo NOS 1961 (14.5ma/15.2ma) (mic grade)
(!!!!!) (Best 12AX7 Single) 12AX7 Telefunken Germany <> bottom smooth plates 1960's (1.2/1.3ma and Gm=1600/1700)
(!!!!!) (Best 5687 Quad) 5687 GE "5-Star" NOS 1969 1-2% matched (Audio Note, Kondo, Modwright, Manley, Ayon)
(!!!!!) (BEST 5992 PAIR) 5992=6V6GT Bendix NOS 1955 (40ma and 42ma) (best 6V6GT sub)
(!!!!!) (Best 7N7 Pair) 7N7 Sylvania chrome top branded CBS NOS 1956 (8.6/9.4ma and 8.8/9.2ma)
(!!!!!) (Best Black Plate Pair) 6AS7G RCA black plates NOS 1950's (70/100ma and 70/94ma)
(!!!!!) (Best ECC801S Single) ECC801S=12AT7 Telefunken <> bottom NOS 1961 (9.0/9.0ma) (1% section balance)
(!!!!!) (Best ECC801S Single) ECC801S=12AT7 Telefunken <> bottom NOS 1962 tube was factory sealed inside box (10.6/11.6ma) (High Ma and Gm)
(!!!!!) (BEST GE PAIR) 6550A GE NOS "stapled plates" late 1970's same build (135.5ma and 136.5ma)
(!!!!!) (Best Holland Pair) 12AX7=ECC83 Philips Holland NOS 1970-1971 (1.3/1.4ma x 2 tubes) (1-2% matched) (High Ma and Gm)
(!!!!!) (Best Holland Pair) 12AX7=ECC83 Philips Holland NOS 1971 (1.3/1.4ma x 2 tubes) (1-2% matched) (High Ma and Gm)
(!!!!!) (Best Holland Pair) E88CC=6922 Philips SQ Holland 1972-1975 1-5% matched (3D /BLOOMY MIDS)
(!!!!!) (Best Matched Quad) 6L6GC RCA black plates NOS 1960's (78.0/78/78.5/80.4ma) (Excellent Quad) (Best in Leben and Fender amps)
(!!!!!) (Best Mullard Pair - for Audio Aero) 6021=CV3986 Mullard UK Mitcham NOS 1971 (5.5/6.2ma and 5.7/6.3ma) (1-3% matched)
(!!!!!) (Best Mullard Pair) E88CC=6922 Mullard England Mitcham plant branded Philips SQ NOS 1969 same date codes (13.0/14.8ma and 14.0/14.2ma) (3D MIDS, low noise)
(!!!!!) (Best Mullard XF2 Pair) EL34 Mullard XF2 NOS branded Tungsol double "O" getter halo 1962 (73ma and 74ma) (oldest Mullard pair)
(!!!!!) (BEST OVERALL 274A) 274A Western Electric NOS (052=1950) "D" getter halo, large shiney getter flash, slightly tilted glass in white box
(!!!!!) (Best Overall Pair) 5687 GE "5-Star" NOS 1969 (35/35ma and 34.5/36ma) 1-2% matched (Highest Ma and Gm)
