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(!!!) (Recommended Pair) 6DJ8=ECC88 Telefunken Germany <> bottom NOS branded Valvo 1960's (12/12.8ma and 13.8/12.6ma)
(!!!) (Recommended Siemens Single) ECC81=12AT7 Siemens branded Mullard NOS circa 1970 (10.0/10.8ma)
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (7ma/11ma) (recommended for mic)
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (9ma/6.5ma) (recommended for mic)
(!!!) (Recommended Single) EC92=6AB4 Siemens Halske NOS 1967 (9.2ma)
(!!!) (Recommended Single) EF94=6AU6 Tungsol used/tests like new 1957 (10ma)
(!!!) (Recommended Single) EZ80 Pope France NOS "O" getter halo 1970 (62/40 and 62/40) 1% section balance
(!!!) (Recommended Single) EZ80 RSD Hungary NOS 1960's (60/40 and 60/40) 1% section balance
(!!!) (Recommended Single) EZ80=6V4 Philips Miniwatt La Radiotechnique Chartres plant France NOS "O" getter halo 1963 (61-62/40)
(!!!) (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) 6V4=EZ80 RFT East Germany branded Funkwerk "W" used/good 1970's (47-48/40)
(!!!) (Single) E81CC=12AT7WA Siemens Munich Germany NOS 1975 (10.8/9.3ma)
(!!!) (Single) EC92=6AB4 Siemens Halske Germany branded Mullard 1964 (8.4ma) (mic)
(!!!) (Single) ECC81=12AT7 Telefunken Germany <> bottom NOS 1963 (6.8ma/7.6ma) (recommended for mic)
(!!!) (Single) ECC85 Siemens Germany NOS 1962 (9.5/8.2ma)
(!!!) (slightly microphonic single) ECC801S Telefunken <> bottom rebranded 12AT7/ECC81 Telefunken NOS 1962 (9.2ma/10.2ma)
(!!) (BEST PRICE) 6AQ5 and 6AQ5A Mixed Brands used/good (4 for $14.99)
(!!) (Best Single) EC92=6AB4 Siemens Halske Germany NOS 1971 (10.2ma)
(!!) (Best Sounding EF89) EF89=6DA6 Mullard UK NOS 1959 (7.5ma)
