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6AN8A GE Great Britain made in Japan NOS 1976 (13/19ma)
6AR6 Raytheon black plate used/good 1952 (67ma)
6AW8A Sylvania NOS 1960's with special silver oxide coating (2.4/21.5ma)
6AW8A Sylvania NOS 1960's with special silver oxide coating (2.8/28ma)
6B4G Ken Rad branded RCA coated glass NOS 1946 (110ma)
6BK7B Philco by Sylvania NOS 1960 (13.2ma/15.2ma)
6BW4 Sylvania black plates used/good 1954-1955
6C6 Tungsol NOS 1955 (45/31 and 2.1ma)
6CS7 Tungsol NOS black plates 1960's (21/10ma) (internals like Sylvania)
6D8EG Philco NOS (1 in stock)
6D8G US Brands NOS (2 in stock)
6DC6 US Brands used/test like new (0 in stock)
6DE4 Sylvania used/like new (1 pair)
6DE4 Tungsol NOS 1960's
6DE6 US Brands NOS (10 in stock)
6DF6 NOS
6DG6GT=6W6GT
6EY6 US Brands NOS (2 in stock)
6F6G RCA Cunningham used/good 1947 (31ma) (Gm like new)
6F6G RCA Victor used/strong 1945 era (30.6ma) (Gm like new)