(!!!!) (Best Pair) 5670W GE NOS 1986 (8.8/9.4ma and 8.8/9.6ma) 1-3% matched
(!!!!) (Recommended Pair) 5670W GE NOS 1986 (7.6/9.0ma and 8.0/9.4ma) 1-3% matched
(!!!!) (Recommended Pair) 5670W GE NOS 1986 (9.0/9.2ma and 8.4/8.8ma) 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 Single) 6U8A GE NOS 1961 (17ma/9.6ma)
(!!) (BEST PAIR) 6CB6A RCA "D" getter NOS around 1960 (9.0ma and 9.2ma)
(!!) (Best Pair) 6EA8 Sylvania branded Zenith NOS 1962
(!!) (PAIR) 6CB6A RCA NOS (7.8ma and 7.8ma) 1% matched
(!!) (PAIR) 6CB6A RCA NOS (8.2ma and 8.5ma)
(!!) (PAIR) 6CB6A RCA NOS 1960's (8ma and 8ma)
(!!) (PAIR) 6CB6A RCA NOS 1960's - 1970's (7ma and 7ma)
(!!) (Recommended Pair) 6J6A RCA NOS 1960's (7.2/7.4ma and 7.4/8.2ma)
(!!) (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) 6JT8=6KR8 Raytheon Japan NOS (10 Pairs)
(!) (Recommended Pair) 5651 Sylvania NOS 1960's (1 pair)