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(!!!) (Best Single) 6SN7GTB RCA branded GE Canada NOS 1968 (7.0/7.0ma) 1% section balance
(!!!!) (Recommended GE Pair) 6SN7GTB GE NOS 1963-1968 (9.7/9.8ma and 9.0/8.6ma) (close Gm) (Schiit Freya, Rogue)
(!!!!) (Best Value Pair) 6SN7GTB GE NOS 1960-1965 (5.6/5.6ma and 6.1/6.8ma) (close Gm) (Schiit Freya, Rogue)
(!!!!) (Best Value Pair) 6SN7GTB GE NOS 1973-1976 (6.5/7.6ma and 6.5/6.8ma) (Schiit Freya, Rogue)
6SN7GTA CBS NOS Black Ribbed Plates similar to RCA early 1950's (8.3/8.6ma)
6SN7GTB CBS black base black plates side-getter, the same shape as Sylvania 6SN7GTB used/good 1961 (7.5/8.0ma)
6SN7GTB RCA used good 1960's (6.4/8.2ma)
(!!!) (Recommended Single) 6SN7GTB Westinghouse gray plates NOS 1965 (8.6/7.4ma)
(!!!!) (Best Value Pair) 6SN7GTB RCA coin-base NOS 1970-1975 (8.8/9ma and 9.3/8.3ma)
(!!!!!) (BEST VALUE PAIR #1) 6SN7GTB GE coin-base NOS 1980 same date codes (7.4/7.6ma and 7.8/7.6ma) (same Gm) (Schiit Freya, Rogue)
(!!!) (Best Value Pair) 6SN7GT RCA NOS and used/very good 1953-1954 same build (7.0/8.5ma and 6.6/7.6ma)
(!!) (Best Value Single) 6SN7GTB RCA used/good 1950's (7.0/7.6ma) (Gm the same)
(!!!!!) (Best Value Pair) 6SN7GTB GE NOS 1964-1965 same build (6.4/7.0ma and 6.6/7.6ma)
(!!!!!) (Best Pair #1) 6SN7GTB GE NOS 1965 same date codes (7.8/7.6ma and 8.6/8.0ma) (Schiit Freya, Rogue)
(!!) 6SN7GTA Sylvania "chrome top" tall bottle used/good 1950 era (6ma/6ma) 1-2% section balance
(!!!!) (Best Single) 6SN7GTB RCA NOS 1958 side getter (9.6/9.8ma)
(!!!!) (Single) JAN-CHS-6SN7W Sylvania "SHORT BOTTLE" 1945 low hours like new in Admiral box (7.8/9.8ma)
(!!!!) (Good Value Single) 6SN7GTA GE "U" getter halo used/good 1954 (6.0/6.4ma)
(!!!!) (Best Value Pair) 6SN7GTA GE "U" getter halo - side getter - copper grid posts NOS 1953-1954 (6.6/6.0ma and 6.0/6.8ma)
(!!!) (Best Single) 6SN7GT Tungsol parallel gray plates NOS 1953 burgundy base large "O" mica (9/10ma)
