(!!!!!) (~ Recommended Pair ~) 12AU7=ECC82 Brimar England NOS ribbed plates large "O" getter halo 1960-1962 (8.6/9.0ma and 8.8/9.4ma) 1-3% matched
(!!!!!) (~ Recommended Pair ~) 12AU7=ECC82 Brimar England NOS ribbed plates large "U" getter halo 1962-1963 (9.3/9.6ma and 9.6/10.2ma) 1-2% matched
(!!!!!) (~ Recommended Pair ~) 12AU7=ECC82 Telefunken Germany <> bottom smooth plates NOS "Tektronix Checked" 1960's (9.0/11.6ma and 9.3/11.0ma) 2% matched (ultra-low noise)
(!!!!) (~ Best RCA Single ~) 12AU7 RCA tall gray ribbed plates "D" getter NOS mid-1950's (8.8/9.0ma)
(!!!!) (~ Recommended Holland Pair ~) ECC82=12AU7 Philips Holland branded Siemens NOS 1965 same date codes 1-3% matched (9.0/9.6ma and 9.9/10.0ma)
(!!!!) (~ Recommended Pair ~) 12AU7=ECC82 Brimar England NOS ribbed plates large "O" getter halo 1960 (8.6/9.2ma and 8.4/8.6ma) 1-3% matched
(!!!!) (~ Recommended Pair ~) 12AU7=ECC82 Telefunken Germany <> bottom smooth plates NOS "Tektronix Checked" 1960's (9.2/15.5ma and 10.0/14.4ma) 1-5% matched
(!!!!) (~ Recommended Single ~) 12AU7=ECC82 Brimar UK NOS ribbed plates large "O" getter halo 1961 (11.2/12.0ma) (High Ma and Gm)
(!!!!) (~ Recommended Single ~) CV491=12AU7=ECC82 Brimar UK NOS ribbed plates 1971 (11.6/12.6ma) (High Ma and Gm)
(!!!!) (~ Recommended Single ~) ECC82=12AU7 Telefunken Diamond Bottom smooth plates NOS 1972 (11ma/14ma)
(!!!!) (~ Recommended Single~) 12AU7=ECC82 Siemens Holland NOS 1965 (10.2/11.2ma)
(!!!!) (~ Recommended Telefunken Pair ~) 12AU7=ECC82 Telefunken Germany smooth plates NOS 1966 and 1972 1-3% matched (9.6/10.6ma and 10.2/10.8ma)
(!!!!) (~ Recommended Telefunken Pair ~) 12AU7=ECC82 Telefunken Germany smooth plates NOS 1972 1-3% matched (9.4/10ma and 9.6/9.6ma)
(!!!) (#1 12AU7 Raytheon 1958) 12AU7 Raytheon Black Ribbed Plates NOS 1958, "D" getter halo, very good printing (9.2/10ma)
(!!!) (#1 12AU7 Raytheon 1958) 12AU7 Raytheon Black Ribbed Plates NOS 1958, "O" getter halo, very good printing (10.2/10.6ma)
(!!!) (#1 12AU7 Siemens Single) E82CC=12AU7 Siemens Germany double mica NOS 1980 boxed in 1986 (10.6/11.0ma) 1-3% section balance
(!!!) (#1 12AU7 Siemens Single) E82CC=12AU7 Siemens Germany double mica NOS 1980 boxed in 1986 (9.8/10.0ma) 1-2% section balance
(!!!) (#1 12AU7A Raytheon 1957) 12AU7A Raytheon Black Ribbed Plates NOS 1957, "D" getter halo, good printing (8.8/10.8ma)
(!!!) (#1 12AU7A Raytheon 1959) 12AU7 Raytheon Black Ribbed Plates NOS 1959, "D" getter halo (8.8/9.4ma)
(!!!) (~ BEST VALUE PAIR ~) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates used/test like new 1955-1957 (8.6/9.0ma and 8.4/8.5ma) 1-3% matched (High Gm and oldest pair)
