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(!!) (Single) 6SN7WGT Sylvania brown base used/good 1954 some nicks on base (6.0/7.2ma)
(!!!!) (Best Westinghouse Single) 6SN7GTB Westinghouse USA black plates NOS 1963 (8.2/8.0ma)
(!!!) (Good Value Single) 6SN7GTB Tungsol tall bottle used/good 1960 era (7.5/7.5ma) 1% section balance
(!!) (Best Single #2) 6SN7GTB Sylvania branded RCA NOS 1963 (8.0ma/8.8ma)
(!!) 6SN7GT RCA used/good 1953 (6.6/7.6ma)
(!!) 6SN7GTB Tungsol black plates tall bottle "U" getter used/75% 1950's (6.2/6.0ma)
(!!) 6SN7GTA RCA branded CAPEHART used/like new 1955 (8.4/9.8ma)
(!!) 6SN7GTB Sylvania used/75% 1960's (6.0/6.4ma)
(!!!!) (BEST PAIR) 6SN7GTB CBS SHORT BOTTLE NOS 1961 same date codes (8.4/8.5ma and 8.2/8.9ma) (similar to Sylvania) (Close Gm) (Schiit Freya, Rogue, Cary)
(!) (Good Value) 6SN7GTB CBS black base black plates side-getter NOS, the same shape as Sylvania 6SN7GTB 1960 (6.8/7.2ma)
(!) (Good Single) 6SN7GTB Westinghouse USA gray plates "O" getter halo NOS 1961 (8.0/9.4ma)
(!!!) 6SN7GTB Westinghouse black plates copper grid posts "D" getter 1950's (7.2/8.4ma)
(slightly microphonic) 6SN7GTA GE NOS 1952 copper grid posts (7.4/10ma)
(READ REVIEW) 6SN7GTB Sylvania chrome top black plates 1956-1958 used/good (7.0/6.8ma and 6.6/6.6ma)
(!) (SINGLE) 6SN7GT Westinghouse USA black plates NOS 1950 era (6.4/6.8ma)
(!!!) (Good Value Pair) 6SN7GTB RCA ADT NOS 1959 (8.4/7.7ma and 8.8/6.7ma)
(!!!) (Recommended Pair) 6SN7GTB GE used/good 1957-1961 (8.2/7.8ma and 7.6/7.2ma) 1-5% matched
(!!) (SINGLE) 6SN7GTB Westinghouse Rad-Tel Tube Co. gray plates "O" getter halo NOS 1964 (8.4/7.4ma)
(Read Review) 6SN7GTB GE NOS 1968-1974 (Schiit)
(!!!!) (Best Single) 6SN7GTA GE NOS "U" getter halo - side getter - copper grid posts 1952 (9.3/11ma)
