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6AW8A Sylvania NOS 1960's with special silver oxide coating (2.8/28ma)
6AX4GTB Tungsol used/good 1950's (48/40)
6BA6 RCA Mexico NOS 1970 era (12ma)
6BQ5 GE NOS 1960's (40ma)
6BQ5 GE NOS 1973 (71ma) (recommended for FIXED-BIAS amp only due to high current)
6BQ5 GE NOS 1977 (58.5ma)
6BQ5 GE Zenith NOS 1976 (46.2ma)
6BQ5 Lindal Japan like new 1970's (50ma)
6BQ5 Lindal Japan NOS 1970's (42ma)
6BQ5 Lindal Japan NOS 1978 (59.5ma)
6BQ5 RCA gray plate used/good 1967 (32.6ma)
6BQ5 RCA Magnavox gray plate used/good 1961 (44ma)
6BQ5 RCA used/good 1970 (40ma)
6CS6 RCA Brazil 1960's - 1970's (19 in stock)
6CS6 RCA NOS (2 in stock)
6CS7 GE branded Tungsol NOS 1961 era (21/11ma)
6CS7 Raytheon by Toshiba Japan gray plates NOS 1970 era (21.5/10.2ma)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6DJ8 GE NOS 1964 orange printing (12.6/16.4ma)
6DJ8 Telefunken Germany <> bottom used/good 1967 (13.5/14.0ma)