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(!!!!!) (Best Pair 1974) 12AU7 Mullard Philips UK NOS 1974 (10.4/9.4ma and 10.0/9.8ma) (Rogue, Hovland, Audio Note) 1-3% matched
(!!!!!) (Best Value Mullard Pair) 12AU7=ECC82 Philips Mullard UK NOS 1966-1974 same build (10.6/10.3ma and 11.7/10.4ma) (close Gm matching) (Rogue, Hovland, Audio Note)
(!!!) (2nd Best Mullard Single) 7247=12DW7 Hammond Mullard ribbed plates like new 1964 (1.0ma and 11.8ma)
(!!!) (Mullard Single) 7247=12DW7 Westinghouse Mullard ribbed plates NOS 1973 (1.0ma and 10.8ma)
7591 Fisher Westinghouse used/good/75% 1963 (43.5ma, Gm=7450)
