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(!!) (Recommended Pair) 6CD6GA RCA used/tests like new 1960's (85ma and 85ma)
(!!) (Recommended Pair) 6CS7 GE Canada NOS black plates 1965-1969 (18/11.2ma and 20/9.6ma) (close Gm)
(!!) (Recommended Pair) 6DJ8 GE NOS 1974-1980 (13.5/14.2ma and 12.4/13.5ma)
(!!) (Recommended Pair) 6DQ5 Sylvania NOS (76ma and 73ma)
(!!) (Recommended Pair) 6DQ5 Sylvania NOS 1960's (93ma and 100ma)
(!!) (Recommended Pair) 6GK5=6FQ5A GE NOS 1968-1981 (10.4ma and 11.2ma)
(!!) (Recommended Pair) 6HA5=6HM5=EC900 Amperex Holland "Globe Logo" NOS in white boxes 1971-1972 (17ma and 18ma) (Highest mA and Gm)
(!!) (Recommended Pair) 6J6A Tungsol NOS "D" getter 1961 (7.5/8.8ma and 7.8/9.2ma)
(!!) (Recommended Pair) 6JS6C GE branded RCA and GE NOS 1970's (70ma and 70ma)
(!!) (Recommended Pair) 6JS6C GE Realistic and GE NOS 1970's - 1981 (70ma and 76ma)
(!!) (Recommended Pair) 6JS6C RCA NOS and like new 1970's (98ma and 102ma)
(!!) (Recommended Pair) 6JT6A Sylvania tipped NOS 1960's same build (72ma and 72.2ma)
(!!) (Recommended Pair) 6KM6 GE branded Westinghouse NOS (152ma and 155ma)
(!!) (Recommended Pair) 6KZ8 Sylvania branded Raytheon NOS
(!!) (Recommended Pair) 6LF6 JAPAN Big Bottle Euro style construction NOS 1970's (92ma and 87ma)
(!!) (Recommended Pair) 6SH7 GE metal can NOS 1958 and 1970 (10.3ma and 11ma)
(!!) (Recommended Pair) 6SH7 GE metal can NOS 1976 (12ma and 13ma) **
(!!) (Recommended Pair) 6SK7 Sylvania NOS 1950 era (9.2ma and 9.0ma)
(!!) (Recommended Pair) 8032 Westinghouse NOS 1968 (88ma and 90ma)
(!!) (Recommended Pair) 8068 GE Hewlett Packard scratch on glass and GE NOS 1970-1971 (46.5ma and 48ma) (Highest Ma)