(!!!!) (Best Pair) 27 Philco by Sylvania NOS 1940's (6.1ma and 6.1ma) 1% matched
(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)
(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)
(!!!!) (BEST PAIR) 408A Western Electric NOS 1976 and 1982 (86/60 and 88/60)
(!!!!) (BEST PAIR) 408A Western Electric NOS 1976 and 1984 (91/60 and 91/60)
(!!!!) (BEST PAIR) 417A Western Electric NOS 1980 (42.5ma and 44ma)
(!!!!) (BEST PAIR) 5842=417A Western Electric NOS 1980 (39ma and 40ma)
(!!!!) (Best Pair) 5842Q Raytheon NOS 1983 (27ma and 29.5ma)
(!!!!) (Best Pair) 5842Q Raytheon NOS 1983 (35ma and 37ma)
(!!!!) (Best Pair) 6BQ7A RCA black plates NOS 1967 same date codes (15/14.5ma and 13.5/16.5ma)
(!!!!) (Best Pair) 6EA7 RCA black plates NOS 1964 (2.4/40.4ma and 2.4/36ma)
(!!!!) (BEST PAIR) 6EU7 GE NOS 1969 same date codes (40-46/32 and 42-46/32)
(!!!!) (Best Pair) 6EU7 RCA NOS 1967 (57-50/32 and 52/56/32)
(!!!!) (Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (5.5/5.2ma and 52/56ma)
(!!!!) (Best Pair) 6FQ7 Zenith by GE NOS 1977 (7.2/8.0ma and 7.0/7.8ma)
(!!!!) (Best Pair) 6J5GT Raytheon metal base black ribbed plate NOS 1940's (8.2ma and 8.4ma) (1-3% matched)
(!!!!) (Best Pair) 6J5GT Sylvania lightning logo NOS 1945-1946 (7.8ma and 7.7ma)
(!!!!) (Best Pair) 6J5GT Sylvania lightning logo NOS 1945-1946 (8.8ma and 8.6ma) (same Gm)
(!!!!) (Best Pair) 6SN7GTA GE "U" getter halo - side getter - copper grid posts NOS 1951-1952 (10.4/12.2ma and 10.6/10.8ma)
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1953 (1.1ma and 1.2ma)
