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(!) 30 Cunningham NOS 1940's original box (2.7ma)
(!) 30 Philco engraved base NOS 1930's (3.7ma)
(!) 47 Raytheon engraved base box plate used/good 1930's (25.2ma Gm=1940)
(!) 47 RCA Radiotron engraved base used/good 1930's (27.5ma Gm=2250)
(!) 47 Tungsol Aristocrat low hours/tests like new 1940's (38ma Gm=2770) (highest mA and Gm)
(!) 5687 RCA black plates used/good 1961 (33/33.5ma)
(!) 5751 GE gray plates double mica used/good 1960's no printing (2.0/2.3ma)
(!) 5AU4 GE NOS 1961 (52/40 and 54/40)
(!) 6080 RCA gray plates NOS 1974 (74ma/105ma)
(!) 6AN8 RCA black plates "D" getter halo 1958 rebranded Admiral (14.2/10.5ma)
(!) 6DE7 GE Admiral black plates NOS 1965 (4.5/27ma) (Woo Audio)
(!) 6EU7 RCA NOS 1970 era (51/32 and 52/32)
(!) 6F6G Sylvania coated glass used/good 1940's (36.8ma)
(!) 6F6GT GE Coronado NOS 1956 (36.8ma)
(!) 6J7GT Hytron used/strong 1940's (2.6ma)
(!) 6L6Y RCA metal can (Y=brown bottom) NOS 1964 (72ma)
(!) 6L6Y RCA metal can (Y=brown bottom) NOS 1966 (77ma)
(!) 6SK7GT Philco by Sylvania chrome top 1952 (10ma)
(!) 6SQ7 Sylvania NOS 1951 (0.9ma and Gm=1000)
(!) 6V6 Tungsol metal can used/good 1955 (33.5ma)
