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(!!!) (Recommended Single 1957) 12AU7A Sylvania gray pinched plates "D" getter halo NOS 1957 (9.2/10.2ma)
(!!!) (Recommended Single) 12AU7A GE NOS 1963 (8.6/9.5ma)
(!!!) (Recommended Single) 12AU7A RCA clear top NOS 1960 era (9.6/9.8ma) (Same Gm)
(!!!) (Recommended Single) CV491=12AU7=ECC82 Brimar England NOS ribbed plates 1974 (9.4/9.2ma)
(!!!) (Single 1960) 5814A=12AU7 GE "5 Star" triple mica NOS "o" getter 1960 (8.0/7.9ma)
(!!!) (SINGLE) 12AU7 RCA tall black plates "D" getter used/good 1950's (9.8/8.2ma)
(!!!) (Single) 12AU7=ECC82 Mullard BVA UK ribbed plates used/good 1970 Mitcham plant (8.4/8.2ma) (sweet sound)
(!!!) (Single) 12AU7=ECC82 Telefunken Germany <> bottom ribbed plates like new 1959 (9.6ma/11.8ma)
(!!!) (Single) 12AU7=ECC82 Telefunken Germany <> bottom smooth plates NOS 1968 (14.5ma/8.6ma)
(!!!) (Single) 12AU7A RCA clear top NOS 1968 (8/11ma)
(!!!) (Single) 5814A GE "5 STAR" with "O" getter halo 1960's (10.8/11.6ma)
(!!!) (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) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (9.8/11.2ma)
(!!!) (Single) JAN-6189=12AU7WA Sylvania NOS 1968 (8.2/9.4ma)
(!!!) (Single) JAN-6189=12AU7WA Sylvania NOS 1978 (9.2/8.8ma) (same Gm)
(!!!) (slightly microphonic) 12AU7A Westinghouse black plates "D" getter halo 1964 NOS (9.6/10.6ma) (similar to RCA black plates)
(!!!) 12AU7 RCA tall gray plates "D" getter used/good 1953 (9.2/9.8ma)
(!!!) 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)
