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(!!!!) (Single 1953) 12AU7 GE gray ribbed plates "U" getter NOS/80% 1953 (7.6/8.0ma) (smooth sound)
(!!!) (Single) JAN-6189=12AU7WA Sylvania NOS 1978 (9.2/8.8ma) (same Gm)
(!!!) (Single) JAN-6189=12AU7WA Sylvania NOS 1968 (8.2/9.4ma)
(!!!) JHS-6189=12AU7WA Sylvania NOS 1965 in white box (10/9ma)
(!!!) JHS-6189=12AU7WA Sylvania NOS 1966 in white box (9.5/9.6ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (8.8/8.4ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (9.6/8.8ma)
(!!!!) (Single) JAN-6189W=12AU7 Philips by Sylvania NOS 1987 (8.2/8.8ma)
(!!!!) (Best Overall Pair 1964) 12AU7=ECC82 Mullard BVA UK ribbed plates shield logo NOS 1964-1965 (13.3/12ma and 12.6/11.5ma) (Rogue, Hovland, Audio Note) (Highest mA and Gm)
(!!!!) (Best Single #2) 12AU7=ECC82 Mullard UK shield logo NOS 1965 (11.2/12.6ma) (smooth rich sound)
(!!!!) (Single 1961) 12AU7=ECC82 Mullard BVA UK shield logo NOS 1961 (7.5/9ma) (Gf1 series) (smooth rich sound)
(!!!!) (Recommended Single 1957) 12AU7A Zenith Sylvania D getter NOS 1957 (13.0/13.2ma)
(!!) 12AU7A Sylvania NOS 1970 (8.8/9.2ma)
12AU7A Sylvania Dumont NOS 1960's (10/8.8ma)
(READ REVIEW) JG-5814A=12AU7 GE triple mica NOS "o" getter 1958-1959 (9.8/9.6ma) 1-2% section balance
(!) 12AU7A Sylvania NOS 1960 (10/10.1ma) 1-2% section balance
(!!!) (Single) 12AU7=ECC82 Telefunken Germany <> bottom ribbed plates like new 1959 (9.6ma/11.8ma)
(!!!) (Best Value) 12AU7=ECC82 Daystrom Mullard UK ribbed plates like new 1963 (9.0/10.2ma) (162 series) (smooth presentattion)
(!!!!) (Best Overall Single) ECC802S=12AU7 Telefunken Germany <> bottom NOS 1970 good printing (11.6ma and 11.5ma) (same Gm) 1-2% section balance
(!!) (Single) 12AU7 Tungsol gray ribbed plates D getter NOS 1957 (11.5/8ma)
