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2A7 Raytheon NOS 1940's (46/29)
(!!!) (Recommended Pair) 26 GE and Ken Rad NOS same build 1940's (3.9ma and 4.0ma)
(!!!) 201A Silvertone Balloon NOS 1930 era (1.8ma and Gm=500)
(!!) 26 GE NOS 1946 (6.7ma, Gm=1200)
(!) 201A Aristocrat NOS 1930's (2.7ma and Gm=900)
6BS8 Tungsol NOS 1960 era (10.2/14ma)
(!!) 26 Super Silvertone by National Union NOS 1940's (5.7ma, Gm=1200)
85 Tungsol JAN NOS 1944 (50/25)
(!!!) CX-301-A Cunningham NOS 1930 era (2.6ma Gm=800)
26 RCA Radiotron/Cunningham engraved used/good 1930's (3.6ma)
85 no printing used/strong 1940's (50/25)
2A7 RCA NOS 1940's (50/29)
(!!!!) (Single) 6BK7B Tungsol branded RCA "U" getter 1957 (10/14ma)
6SF5 Sylvania used/good 1949 (0.8ma Gm=1100)
(!!!!) (Best GE Single) 6BK7B GE gray plates NOS "U" getter 1974 (8.0/8.8ma)
(!!!!) (Single) 6BK7B GE gray plates NOS "U" getter 1963 (6.2/5.4ma)
231D Western Electric NOS 1953 (1.6ma)
6BJ6 Rogers Canada made by Sylvania like new 1955-1956 (8.8mA)
6BJ6 Hitachi Japan like new (8.8mA)
6CY7 (sold out)
