(!!!!!) (Best Value Pair) 12AU7A RCA NOS 1964-1965 (8.2/11ma and 8.8/10.4ma)
(!!!!) (2nd Best Mullard Single) 12AU7A=ECC82 Mullard rebranded "GE" ribbed plates NOS 1966 (9.8/11ma) (smooth rich sound)
(!!!!) (2nd Best Pair - warm and smooth) 12AU7A GE NOS 1974-1981 (8.2/8.8ma and 8.3/8.8ma) (Rogue)
(!!!!) (Best Mullard Single) 12AU7A Amperex by Mullard UK NOS ribbed plates 1974 (10.6/11.6ma) (DAC, linestage)
(!!!!) (Best Single 1965) ECC82=12AU7 Miniwatt Holland like new 1965 (9.4/9.4ma) 1% section balance
(!!!!) (Best Value Pair - warm and smooth) 6680=12AU7A GE NOS 1970's 1-2% matched (8/8ma and 7.7/7.9ma)
(!!!!) (Best Value Single) 12AU7=ECC82 Mullard UK ribbed plates like new 1965 (10/12.8ma) (smooth rich sound)
(!!!!) (Pair) 12AU7A GE NOS 1970's (7.0/7.6ma and 6.8/7.6ma) (Rogue)
(!!!!) (Recommended Single) 12AU7=ECC82 Mullard UK ribbed plates NOS 1963 (11.4/9.6ma) (smooth rich sound)
(!!!!) (Recommended Single) 12AU7=ECC82 Mullard UK ribbed plates NOS 1970 (10.4/8.6ma)(smooth rich sound)
(!!!!) (Recommended Single) 12AU7=ECC82 Mullard UK ribbed plates NOS 1972 (12.2/13.6ma) (same Gm) (smooth rich sound)
(!!!!) (Recommended Single) 12AU7A Sylvania NOS 1960's (10/2/11.2ma)
(!!!) (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)
(!!!) (Best Value Single) 12AU7A RCA CANADA (Philips Plant) NOS 1964 same build as Mullard UK (9.0/9.2ma) 1-2% section balance
(!!!) (Best Value used) 12AU7=ECC82 Mullard UK branded Philips Miniwatt ribbed plates used/good 1962 (8.2/10.4ma)
(!!!) (Good Value Pair) 12AU7A RCA clear top used/good 1960's (7.5/9.6ma and 7.5/9.2ma)
(!!!) (Good Value Pair) 12AU7A RCA clear top used/good 1960's (7.8/9.2ma and 7.6/8.8ma)
(!!!) (Good Value Single) 12AU7 RCA black plates "D" getter mid-1950's used/tests like new (9.8/11.4ma)