6K6GT GE NOS 1959 (41.5ma)
6K6GT Sylvania black plate chrome top NOS 1956 (41.2ma)
6K6GT Sylvania chrome top black plate lightning logo NOS 1954 (54.6ma)
6L6GC GE NOS 1964 broken center guide pin (61ma)
6S4A GE Admiral NOS 1965 (27.5ma)
6S4A GE Canada NOS 1965 (27ma)
6S4A Raytheon NOS 1961 (20ma)
6S4A RCA USA black plate NOS 1970's (19ma)
6S4A Sylvania NOS 1960's (20ma)
6S4A Sylvania triple mica NOS 1960's (20.2ma)
6S4A Tungsol branded GE NOS 1966 (21.5ma)
6S4A Westinghouse NOS 1963 (23ma)
6SC7 RCA NOS 1959 (2.3/2.0ma)
6SN7GTB RCA used good 1960's (6.4/8.2ma)
6T9 GE branded RCA NOS original boxes (2 in stock)
6T9 GE branded RCA NOS original boxes (3 in stock)
6T9 GE NOS 1960's
6X4 RCA "O" getter low hours/like new 1960's (49/40 and 52/40)
6X5GT RCA branded Raytheon NOS 1950's (51/40 and 52/40)
6X5GT Sylvania chrome top NOS 1958 (51/40 and 52/40)
