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6SK7 Sylvania NOS 1951 (8.8ma)
6SK7GT National Union NOS 1950 smaller top getter (8.2ma)
6SK7GT Raytheon used/good/70% 1940's (6.6ma)
6SK7GT Sylvania used/good 1940's (7.3ma)
6SK7GT Tungsol used/good 1949 (6.8ma)
6SQ7 metal used/good (3 in stock)
6SR7 US Brands metal can NOS (15 in stock)
6T10 US Brands NOS (8 in stock)
6T7G Philco NOS (2 in stock)
6T8 Sylvania NOS 1950's (8 in stock)
6T8A GE Canada NOS 1960's (6 in stock)
6T8A Lafayette Japan NOS (6 in stock)
6T8A RCA NOS (4 in stock)
6T8A Sylvania branded Westinghouse NOS 1967 (1 in stock)
6T8A Tungsol NOS 1960's (2 in stock)
6T9 GE branded RCA NOS original boxes (2 in stock)
6T9 GE branded RCA NOS original boxes (3 in stock)
6T9 GE NOS 1960's
6U1 China (output tube in Dayton Audio HTA amp)
6U10 Sylvania NOS in white box (
