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(!!!!) (Best Overall Pair) 6FQ7 RCA clear top NOS "D" getter halo 1969 (8.2/8.0ma and 8.0/7.8ma) (close Gm)
(!!!!) (Best Value Pair) 6FQ7 RCA clear top used/good 1964-1967 (6.0/5.8ma and 6.2/5.4ma) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!) (Best Single) 12AU7A RCA clear top NOS 1973 (10.8/11ma) (same Gm) 1-2% section balance
(!!!) (Best Single) 5755=420A Western Electric clear top NOS 1958 (2.0ma/2.1ma)
(!!!) (Good Value Pair) 12AU7A RCA clear top used/good 1960's (7.5/9.6ma and 7.5/9.2ma)
(!!!) (Single) 5755=420A Western Electric clear top tests like new 1952 (1.6ma/1.7ma)
(!!) (BEST VALUE SINGLE) 12AU7A RCA clear top used/good 1960's (8.0/9.4ma)
(!!) 12AU7A RCA clear top used/good 1960's (7.4/8.6ma)
(!!) 12AU7A RCA clear top used/good 1964 (8.2/8.6ma)
(!) (Recommended Pair) EL36 Haltron Japan clear top NOS 1960's (86ma and 93ma)
6AW8A GE NOS 1976 (4.9/21ma)
6L6GC Sylvania clear top NOS 1960's copper grid posts (68ma)
7AU7 RCA clear top NOS pin #2 slightly shorter than the other pins (1 in stock)
