(!!!!) (2nd Best Pair - warm and smooth) 12AU7A GE NOS 1974-1981 (8.2/8.8ma and 8.3/8.8ma) (Rogue)
(!!!!) (Best Pair) 6AC7 RCA NOS 1960's (11ma and 11.8ma)
(!!!!) (Best Pair) 6AC7 RCA NOS 1961-1962 (10.3ma and 10.6ma)
(!!!!) (BEST SINGLE) 12AU7A GE NOS 1963 copper grid posts (11.4/11.6ma) 1-2% section balance
(!!!!) (Pair - warm and smooth) 12AU7A GE NOS 1979 (7.2/7.8ma and 7.8/7.4ma) (Rogue)
(!!!!) (Pair) 12AU7A GE NOS 1970's (7.0/7.6ma and 6.8/7.6ma) (Rogue)
(!!!!) (Recommended Pair - warm and smooth) 6680=12AU7A GE NOS 1970's 1-2% matched (8/8ma and 7.7/7.9ma)
(!!!!) (Recommended PAIR) 6AC7 RCA NOS 1961 (11.4/12.4ma)
(!!!) (BEST PRICE) 12AU7A GE used/good 1961 - 1984 (4 for $29.99)
(!!!) (BEST PRICE) 12AU7A GE used/good 1969 - 1980 (4 for $29.99)
(!!!) (Best Value GE Pair) 12AU7A GE used/good 1975 (7.2/7.2ma and 7.6/7.2ma)
(!!!) (Recommended Pair) 6AC7 RCA NOS 1950's (11.5ma and 12.2ma)
(!!!) (Recommended Pair) 6AC7 RCA NOS 1970 era (10.0ma and 10.5ma)
(!!!) (Recommended Single) 12AU7A GE NOS 1963 (8.6/9.5ma)
(!!!) (Recommended Single) 12AU7A GE NOS 1965 (8.8/8.8ma) 1% section balance
(!!!) 12AU7A GE "U" getter like new 1959 (10.8/10.2ma)
(!!!) 12AU7A GE "U" getter low hours/tests like new 1957 (10.0/8.8ma)
(!!) (Best GE Pair) 6AC7 NOS 1960's - 1970's (13ma/13.5ma)
(!!) (BEST PRICE) 6AC7 Mixed US Brands (4 tubes for $14.99)
(!!) (BEST PRICE) 6AC7W RCA used/good (4 tubes for $8.99)