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(!!!!) (Best Pair #1) 5670W GE NOS 1986 (8.0/8.4ma and 8.0/8.8ma) 1-3% matched (close Gm)
(!!!!) (Best Pair #3) 5670W GE NOS 1986 (7.8/8.8ma and 7.6/8.2ma) 1-5% matched
(!!!!) (Best Pair #3) 5670W GE NOS 1986 (8.4/7.2ma and 8.0/7.4ma) (Same Gm) 1-2% matched
(!!!) (Best Pair) 6AH6WA GE NOS 1980's (10.6/11ma)
(!!!) (Best Single) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!) (BEST PAIR #2) 6H6 GE NOS 1972-1974 (46-48/40 and 45-48/40)
(!!) (BEST PAIR #3) 6H6 GE NOS 1970-1977 (44-47/40 and 44-47/40)
(!!) (Best Pair) 18FX6 Sylvania branded RCA NOS 1960's (80/60 and 81/60)
(!!) (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)
(!!) (PAIR) 6CB6A RCA Tektronix Checked NOS (8.0ma and 8.3ma)
(!!) (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)
(!) (Best Single) JAN-6AH6WA Sylvania NOS 1968 (11ma)
(!) (Best Single) JAN-6AH6WA Sylvania NOS 1969 (13ma) (Highest mA and Gm)
(!) (PAIR) 6HK5 Sylvania branded Dumont NOS 1964-1969 (92/60 and 93/60)
(!) (PAIR) CK-5651 Raytheon NOS 1960's
(!) (Recommended Pair) 6AH6WA GE NOS 1980's (10/10.6ma)
