(!!!!!) (2nd Best Single 1958) 12AX7=ECC83 Mullard UK "long plates" NOS 1958 (1.3/1.4ma) (f91 series)
(!!!!!) (Best Mullard Pair) 12AX7=ECC83 Mullard UK ribbed plates NOS 1970-1974 (1.2/1.3ma and 1.2/1.1ma) (same Gm)
(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma)
(!!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.5/5.3ma) 1-3% matched
(!!!!!) (Recommended Pair) 6C4C=6B4G Russian NOS 1955 and 1968 (91ma and 96ma) (these are some of the best sounding 6B4G ever made)
(!!!!) (Best Pair 1963) JG-5751 GE double mica gray plates NOS 1963 (2.0/2.2ma and 2.0/2.1ma)
(!!!!) (Best Pair) 5V4GA GE branded Raytheon NOS 1960's (60-60/40 and 60-60/40)
(!!!!) (Best Pair) 5V4GA GE branded Raytheon NOS 1960's (60-60/40 and 60-61/40)
(!!!!) (Best Pair) 5V4GA GE NOS (60-60/40 and 60-60/40)
(!!!!) (Best Pair) JAN-6189=12AU7WA Sylvania NOS 1972-1973 (9.3/10.4ma and 9.6/10.6ma) 1-3% matched
(!!!!) (Best RCA Pair) 5V4GA RCA gray plates NOS 1968-1972 (58-58/40 and 59-59/40)
(!!!!) (Best Single 1975) GZ34 Mullard UK NOS 1975 (59/40 and 60/40)
(!!!!) (Best Value Single) E88CC=6922 Mullard SQ Holland used/good 1966 (11.0/11.4ma) (3D MIDS, low noise, sweet sound) (same Gm)
(!!!!) (Good Value Single) 6SN7GTB Westinghouse USA black plates "D" getter halo like new 1960 (6.8/7ma)
(!!!!) (Good Value XF2 Pair) EL34 Mullard UK XF2 double round "O-O" getter halo used/good 1965-1967 (72ma and 76.5ma)
(!!!!) (Good Value) JG-12AY7 GE box plates like new 1953 (3.3/2.5ma)
(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (5.7/5.6ma) 1-2% matched
(!!!!) (Recommended Pair) 403B Western Electric NOS "D" getter 1969 (6.8/7.0ma)
(!!!!) (Recommended Pair) 403B=6AK5 Western Electric NOS "D" getter 1969 (4.8/4.5ma)
(!!!!) (Recommended Pair) 6SN7GTB RCA NOS 1964-1970 (7.2/8.2ma and 7.0/7.4ma)
