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6CS6 Sylvania NOS 1960's (3 in stock)
6CS7 GE branded Tungsol NOS 1961 era (21/11ma)
6CS7 RCA branded Westinghouse NOS 1967 (32ma and 10.6ma)
6CS7 RCA NOS 1970's (23.6ma and 13.5ma)
6CS7 Sylvania branded RCA used/good "U" getter halo 1950's (18/8.2ma)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6F7G RCA Cunningham like new 1930's
6F7G Sylvania NOS 1940's
6F7G US Brands NOS (15 in stock) (BEST PRICE)
6F7G used/good
6F8G GE black parallel ribbed plates NOS 1940's (6.2ma/7.2ma)
6F8G RCA gray ribbed staggered plates NOS no printing 1950 era (7ma/8ma)
6FA7 NOS
6FD6=6ES6 NOS
6FG7 US Brands NOS (6 in stock)
6FH5 US Brands NOS (2 in stock)
6FH8 US Brands NOS (7 in stock)
6FM7 GE branded RCA used/tests like new
6FM7 GE NOS (2 in stock) (Dennis Had Inspire preamp)
6FM7 Sylvania black plates NOS (3 in stock)
