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6EQ7 US Brands NOS (3 in stock)
6ER5 RCA branded GE NOS 1960's (12ma Gm=10,800)
6ER5 Sylvania NOS 1960's faded printing (10.6ma Gm=13,000)
6ES5 Sylvania rebranded GE NOS
6ES6=6FD6 International NOS
6EW7 Daystrom by RCA BIG BOTTLE used/70-80% 1960's (4.5/32ma)
6EW7 RCA BIG BOTTLE black plates NOS 1961 era (5.4/42ma)
6EW7 RCA BIG BOTTLE NOS 1960's (5.6/36ma)
6EZ5 US Brands NOS (3 in stock)
6F5 GE Amperex metal can NOS (1.0ma Gm=1500)
6F5 GE metal can NOS 1946 (1.2ma Gm=1700)
6F5 RCA metal can NOS 1950's (1.0ma Gm=1500)
6F5 RCA metal can NOS 1973 (1.1ma Gm=1500)
6F5 RCA Victor metal can used/good 1940's (0.6ma Gm=900)
6F5 Sylvania metal can NOS 1954 (1.0ma Gm=1500)
6F5 US Brands metal can NOS (9 in stock)
6F6G National Union black plate NOS 1951 (40.5ma)
6F6G RCA Cunningham used/good 1947 (31ma) (Gm like new)
6F6G RCA Victor used/strong 1945 era (30.6ma) (Gm like new)
6F6G Tungsol used/strong 1940's (34ma) (Gm like new)
