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(!!!) (Best Pair #2) 5749W=6BA6 Philips JAN by Sylvania NOS 1980's (11.4ma and 11.9ma) 1-3 matched
(!!!) (Best Pair #2) 6463 GE NOS 1965 (15.0/16.4ma and 15.6/15.8ma) (same pinout as 6350)
(!!!) (Best Pair #2) EC92=6AB4 Telefunken Germany <> bottom NOS 1965-1969 (7.5/7.8ma) (mic)
(!!!) (BEST PAIR #2) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (7.2ma and 7.3ma)
(!!!) (Best Pair #3) 448A Western Electric tipped top used/good 1965-1966 (28ma and 29.2ma) (same Gm)
(!!!) (Best Pair #3) 5749W=6BA6 Philips JAN by Sylvania NOS 1980's (10.4ma and 10.3ma) 1-3% matched
(!!!) (BEST PAIR #3) 6463 GE NOS 1965 (14.5/12.8ma and 13.5/13.7ma)
(!!!) (Best Pair #3) 6CW4 RCA NOS 1961-1965 (103/60 and 102/60)
(!!!) (Best Pair #3) 6GU7 RCA NOS 1970-1971 (10/13ma and 11/12ma)
(!!!) (Best Pair #3) E80CC=6085 Philips SQ and RTC Holland NOS 1967-1971 (5.8/6.9ma and 5.6/7.0ma) (Same Gm)
(!!!) (Best Pair #4) 5749W=6BA6 Philips JAN by Sylvania NOS 1980's (9.2ma and 9.0ma) 1-3% matched
(!!!) (Best Pair #4) 6AU6A GE NOS 1977 (6.1ma and 6.1ma) 1-3% matched (Sony C800G mic)
(!!!) (Best Pair) 12AZ7A Toshiba branded Raytheon Japan gray plates NOS 1960's (11.3/12.3ma and 11.4/11.8ma)
(!!!) (Best Pair) 12BA6 Westinghouse NOS 1960 era (9.8ma / 10.4ma)
(!!!) (BEST PAIR) 18FX6 GE NOS 1961-1967 (84/60 and 86/60)
(!!!) (Best Pair) 26 Super Silvertone ST-14 used/like new 1940's (5.7ma and 6.0ma)
(!!!) (Best Pair) 26 Sylvania branded Zenith black plate NOS 1946 (5.4ma and 5.6ma) (rare)
(!!!) (Best Pair) 5751 GE double mica gray plates NOS 1979-1981 (2.4/2.5ma and 2.3/2.6ma) 1-3% matched (Close Gm)
(!!!) (Best Pair) 6AG7Y RCA brown bottom NOS 1960-1964 (32.3ma and 32.5ma)
(!!!) (Best Pair) 6AH6WA GE NOS 1980's (10.6/11ma)
