(!!!!) (Recommended Pair) 5670W GE NOS 1986 (7.4/8.6ma and 7.8/8.8ma)
(!!!!) (Recommended Pair) 5670W GE NOS 1986 (7.6/9.0ma and 8.0/9.4ma) 1-3% matched
(!!!) (Best Pair) 6AH6WA GE NOS 1980's (10.5/10.3ma)
(!!!) (Best Pair) 6AH6WA GE NOS 1980's (10.6/11ma)
(!!!) (Best Single) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!) (BEST PAIR) 6CB6A RCA "D" getter NOS around 1960 (9.0ma and 9.2ma)
(!!) (PAIR) 6CB6A RCA NOS (8.2ma and 8.5ma)
(!!) (PAIR) 6CB6A RCA NOS 1960's - 1970's (7ma and 7ma)
(!!) (Recommended Single) 6U8A GE NOS 1977 (14.2ma/10ma)
(!) (Best RCA Pair) 6SG7 RCA metal can NOS 1961 (10.0/10.4ma)
(!) (Best RCA Pair) 6SG7 RCA metal can NOS 1961 (11.6/12.4ma)
(!) (PAIR) 12SJ7 RCA 1960's NOS rebranded United 1982 (3.2ma and 3.2ma)
(!) (PAIR) 12SJ7 RCA NOS 1958 (2.8ma and 2.4ma)
(!) (Recommended Pair) 5651 Sylvania NOS 1960's (1 pair)
(!) (Recommended Pair) 5651 Sylvania NOS 1970 era (1 pair)
(!) (Recommended Pair) 6AH6WA GE NOS 1980's (10/10.6ma)
(!) (Recommended Pair) 6AH6WA GE NOS 1980's (8.3/8.6ma) (Same Gm)
(!) (Recommended Pair) 6AH6WA GE NOS 1980's (9.6/10ma)
(!) (Recommended Pair) 6AH6WA GE NOS 1983 (9.0/9.4ma)
