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6ES5 Sylvania rebranded GE NOS
6ES6=6FD6 International NOS
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)
6F7G Philco engraved base NOS
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 GE parallel plates NOS 1940's (8.0ma and 8.4ma)
6F8G Raytheon NOS 1945 era (5.8/5.4ma)
6F8G Raytheon staggered black ribbed plates used/strong 1940's (7.6ma and 8.8ma)
6F8G RCA gray ribbed staggered plates NOS no printing 1950 era (7ma/8ma)
6F8G RCA Radiotron staggered black ribbed plates used/good 1940's (9.0/7.2ma)
