(!!!) (Recommended Pair) 6BK7B Tungsol black plates NOS "O" getter 1960 era (9.5/12ma and 9.8/10.5ma)
(!!!) (Recommended Pair) 6BK7B Tungsol black plates NOS "O" getter 1960's (7.5/8.6ma and 8.2/9.4ma)
(!!!) (Recommended Pair) 6BK7B Tungsol gray plates NOS "O" getter 1960's (10/11ma and 10.6/13.2ma)
(!!!) (Recommended Pair) 6BQ7A RCA black plates NOS 1967 (16.5/14ma and 15.5/18ma)
(!!!) (Recommended Pair) 6DZ4 GE NOS 1960's (21ma and 22ma)
(!!!) (Recommended Pair) 6FQ7 GE NOS 1973-1974 (6.5/8.4ma and 7.0/8.0ma)
(!!!) (Recommended Pair) 6GK5=6FQ5A Sylvania rebranded Raytheon NOS (11.0ma and 11.4ma)
(!!!) (Recommended Pair) 6GK5=6FQ5A Sylvania rebranded Raytheon NOS (8.2ma and 8.3ma)
(!!!) (Recommended Pair) 6GK5=6FQ5A Toshiba Japan rebranded Raytheon NOS (8.7ma and 9.7ma)
(!!!) (Recommended Pair) 6HA5=6HM5=EC900 Amperex Holland "Globe Logo" NOS in white boxes 1971-1972 (10.4ma and 10.6ma)
(!!!) (Recommended Pair) 6J6A Sylvania NOS
(!!!) (Recommended Pair) 6JB6 Sylvania NOS (72ma and 72ma)
(!!!) (Recommended PAIR) 6JB6A RCA NOS 1970 era same build (74ma and 80ma) (DRAKE)
(!!!) (Recommended Pair) 6JT6A RCA branded GE NOS 1979 (78ma and 80ma)
(!!!) (Recommended Pair) 6JT6A RCA NOS 1970 era (73.2ma and 74.4ma)
(!!!) (Recommended Pair) 6JT6A RCA rebranded GE and Amperex NOS 1970 era (66ma and 67ma)
(!!!) (Recommended Pair) 6KG6A Westinghouse JAPAN NOS original boxes 1973 (109ma and 110ma)
(!!!) (Recommended Pair) 6KG6A Westinghouse JAPAN NOS original boxes 1973 (140ma and 144.5ma)
(!!!) (Recommended Pair) 6KG6A Westinghouse JAPAN NOS original boxes 1973 (98ma and 99ma)
(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1969-1977 (1.7/1.9ma and 1.6/1.8ma) (same Gm)
