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56 RCA Balloon engraved base black plate tests like new 1930's (4.7ma)
6C6 Cunningham Radiotron used/good 1930's (42/31)
6C6 Raytheon used/tests like new 1930's hairline crack in base (2.1ma)
6D6 National Union used/tests like new 1930's (66/40)
6D6 Raytheon used/good 1930's (62/40)
6D6 US Brands used/good (2 for $8)
6D8G 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)
6F6G Tungsol used/strong 1940's (34ma) (Gm like new)
6F6GT Sylvania used/good 1949 broke off guide pin (32ma)
71A Super Silvertone by Sylvania engraved base NOS 1937 (19ma)
75 Philco by Sylvania Dual-Diode Triode used/strong 1930's pins cleaned (27/19)
75=VT-75 Ken Rad Dual-Diode Triode used/good 1930's (26/19)
75=VT-75 RCA Dual-Diode Triode NOS 1948 (36/19)
75=VT-75 Sylvania Dual-Diode Triode used/good glass chip inside tube 1930's (26/19)
78 US Brands used/good (6 in stock)
78 Wards USA NOS 1940's
