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(!!!) (Single 1956) 12AY7 GE "D" getter like new 1956 (3.1/2.8ma)
(!!!) (Single 1960) 5814A=12AU7 GE "5 Star" triple mica NOS "o" getter 1960 (8.0/7.9ma)
(!!!) (Single) 12AU7=ECC82 Mullard BVA UK ribbed plates used/good 1970 Mitcham plant (8.4/8.2ma) (sweet sound)
(!!!) (Single) 12BH7A RCA NOS 1970's (16.4/9.6ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (8.8/8.4ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (9.6/8.8ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (9.8/11.2ma)
(!!!) (Single) 6AS7G RCA branded GE black plates used/good 1953 (114/75ma)
(!!!) (Single) 7199 RCA Black Plates NOS 1970 era (10.6/8.6ma)
(!!!) (Single) CV378=GZ37 Mullard low hours/tests like new "O" getter halo 1967 some stains around top of glass (51/40 and 51/40)
(!!!) (Single) ECF80=6BL8 Telefunken Germany <> bottom NOS 1962 (11/7ma)
(!!!) (Single) GB-6X4WA Sylvania Gold Brand NOS "D" getter 1960 era (57/40 and 57/40)
(!!!) (slightly microphonic) 12AU7A Westinghouse black plates "D" getter halo 1964 NOS (9.6/10.6ma) (similar to RCA black plates)
(!!!) (slightly microphonic) 6922=E88CC Tesla Czech Republic NOS 1970 (22/21ma)
(!!!) (slightly microphonic) JRC-5751WA RCA black plates triple mica D getter 1957 NOS (2.3ma/2.2ma) (1-3% section balance
(!!!) 12AX7 Sylvania 1960-1965 used/tests like new small mica flake inside tube (Gm=2400/2800)
(!!!) 12BH7A RCA branded Zenith NOS 1970 era (10/13.2ma)
(!!!) 5U4GB GE NOS 1971 (58/40 and 61/40)
(!!!) 6B4G Tungsol NOS 1940's (81ma)
(!!!) 6BL7GTA GE branded Marconi NOS 1960 era tilted glass (46/53ma) (High Gm) strong single
