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(!!!) 12SN7GTA Sylvania branded RCA used/good 1967 (10/12.5ma)
(!!!) 286A Western Electric "top printing" NOS 1942-1945 (6.6ma)
(!!!) 286A Western Electric "top printing" NOS 1942-1945 (6.9ma)
(!!!) 286A Western Electric "top printing" NOS 1942-1945 (7.3ma)
(!!!) 286A Western Electric Engraved Base NOS 1930's (6.6ma)
(!!!) 286A Western Electric NOS "top printing" 1942-1945 smaller side getter (7.6ma)
(!!!) 311B Western Electric used/like new condition 1960 (25ma)
(!!!) 418A Western Electric NOS 1952 original box (34ma)
(!!!) 418A Western Electric NOS 1952 original box (41ma)
(!!!) (slightly microphonic) JRC-5751WA RCA black plates triple mica D getter 1957 NOS (2.3ma/2.2ma) (1-3% section balance
(!!!) (Best Value Single) 6922=E88CC Tesla Czech Republic NOS 1967 (12/15.7ma) (mis-matched Gm) (recommended for mic)
(!!!) 6BL7GTA GE branded Marconi NOS 1960 era tilted glass (46/53ma) (High Gm) strong single
(!!!) (Best Single 1961) 6BQ7A RCA black plates NOS "D" getter 1961 (8.2/8.4ma) 1-3% section balance (Douk Audio, Modwright, Schiit)
(!!!) (Recommended Pair) 6BX7GT GE branded RCA NOS 1958 and 1963 (47ma/52ma and 45/50ma)
(!!!) (Best Single) 6BX7GT RCA NOS 1967 (48ma/49ma)
(!!!) 6DE7 GE Canada black plates NOS 1967 (4.6/42ma) (Woo Audio)
(!!!) 6DE7 Sylvania black plates "U" getter NOS 1950's (8/31ma) (Woo Audio)
(!!!) JAN-5814A Sylvania NOS 1967 (8.4/9.2ma)
(!!!) JAN-5814A Sylvania NOS 1967 (8.6/11.2ma)
(!!!) (Recommended Single) JAN-2C51=5670 Sylvania gray plates NOS "D" getter 1960 (6.2/6.4ma) 1-3% section balance
