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(!!!!) (3rd Best Pair 1960) 12AX7 Westinghouse NOS gray pinched plates "D" getter 1960 faded printing (1.0/1.0ma and 1.2/0.9ma) 1-5% matched
(!!!!) (Best Overall Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (5.5/5.2ma and 63/63.5ma) 1-3% matched
(!!!!) (Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (5.5/5.2ma and 52/56ma)
(!!!!) (Best Single 1960) 12AX7 Westinghouse NOS gray pinched plates "D" getter 1960 (Gm=1700/1800 and 1.3/1.4ma)
(!!!!) (BEST SINGLE) 6BL7GTA GE "D" getter NOS 1958 (38.0/37.6ma) 1-2% section balance
(!!!!) (Best Value Single) 12AX7 Westinghouse gray pinched plates "D" getter like new 1960 faded printing (Gm=1600/1700 and 1.3/1.4mA) (same plate structure as 5751)
(!!!!) (Best Value Single) 12AX7 Westinghouse gray pinched plates "D" getter like new 1960 faded printing (Gm=1800/1800 and 1.4/1.3mA) (same plate structure as 5751)
(!!!!) (Best Westinghouse Single) 6SN7GTB Westinghouse USA black plates NOS 1963 (8.2/8.0ma)
(!!!!) (Good Value Single) 6SN7GTB Westinghouse USA black plates "D" getter halo like new 1960 (6.8/7ma)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (4.9/4.6ma and 42/43ma)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1971 (5.3/5.4ma and 58/55ma)
(!!!) (2nd Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1971 (4.9/5.2ma and 59/56ma)
(!!!) (Best Pair) 12BY7A GE NOS 1970 (35ma and 35.5ma)
(!!!) (BEST PAIR) 8417 Westinghouse "tan base" NOS 1960's large triple getters (114ma and 115.5ma) (rare)
(!!!) (Best Value Single) 12AX7 Triotron by Philips Canada NOS 1963 (1.3/1.5ma and Gm=1800/1900)(same sound as Holland)
(!!!) (Good Value Single) 5U4G=VT-244 RCA used/good 1940's scratches on base (47/40 and 48/40)
(!!!) (Recommended Black Plates) 12AU7A Westinghouse black plates 1960 era rebranded United 1981 "D" getter halo (8.4/9.8ma) (similar to RCA black plates)
(!!!) (Recommended Pair) 12AX7 Triotron by Philips Holland NOS and Valvo Holland like new 1966-1968 (1.7/1.5ma and 1.5/1.5ma)
(!!!) (Recommended Single) 6BX7GT GE "O" getter gray plates 1963 (71/76ma)
(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse "O" getter gray plates 1960's (43/48ma)
