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(!!!!) (Recommended Mullard) E88CC=6922 Philips SQ England NOS 1971 (10.5/12.4ma) (Sweet, beautiful midrange, low noise)
(!!!!) (Recommended Pair) 5751 RCA black plates low hours/test like new 1961-1962 (2.5/2.5ma and 2.7/2.4ma) (Best Audio Grade 5751) (same Gm)
(!!!!) (Recommended Pair) EL84 Valvo Germany made in Hamburg NOS 1962-1963 (48ma and 52ma)
(!!!!) (Recommended Single) CV378=GZ37 Mullard UK NOS 1967 (52/40 and 54/40) 1-3% section balance
(!!!!) (Single) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 low hours/like new (2.2/2.0ma)
(!!!!) (Single) E83CC=12AX7 Siemens Halske Germany NOS 1976 (0.7/0.9ma and Gm=1400/1600)
(!!!!) (Slightly microhonic Single) 5751 RCA Hewlett Packard black plates NOS 1968 (2.4/2.6ma)
(!!!) (Best Overall Pair #2) 5687WB GE branded CK5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (39/38.6ma and 38/37ma)
(!!!) (Best Overall Pair) 5687WB GE branded CK5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (40/41.5ma and 40/40.5ma)
(!!!) (Best Pair #1) ECL82=6BM8 Mullard UK branded Mazda NOS 1970's (2.1/36ma and 2.0/36.5ma) 1-2% matched
(!!!) (Best Pair #1) EL84 Siemens Halske Germany NOS 1967-1968 (48.5ma and 49ma) 1-3% matched
(!!!) (Best Pair #2) ECL82=6BM8 Mullard UK branded Mazda NOS 1970's (2.0/36ma and 2.0/35ma) 1-2% matched
(!!!) (Best Pair #3) ECL82=6BM8 Mullard UK branded Mazda NOS 1970's (2.2/34ma and 2.0/33ma) 1-3% matched
(!!!) (Best Pair #3) EL84 Siemens Halske Germany NOS 1963 (47ma and 48.2ma)
(!!!) (Best Pair #3) EL84 Siemens Halske Germany NOS 1969-1971 (54.0ma and 57.6ma) (Highest mA and Gm)
(!!!) (Best Raytheon Pair #1) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (35.0/34.6ma and 34.5/35.0ma) 1-2% matched
(!!!) (Best Raytheon Pair #2) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (36.5/35.0ma and 38.5/35.5ma) 1-3% matched
(!!!) (Best Raytheon Pair #3) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (35/37ma and 35.5/38ma) 1-3% matched (Highest Gm) (Manley, Modwright, Audio Note)
(!!!) (Best Raytheon Pair #4) CK-5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (31/32ma and 32/31ma) 1-3% matched
(!!!) (Best Siemens Pair) EL84 Siemens Halske Germany 1966-1969 (40ma and 42.5ma)
