(!!!!!) (2nd Best Pair 1962) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (1.1/1.1ma and 1.1/1.3ma) 1-2% matched (Aesthetix, EAR, Lamm, VTL, Jadis, Nagra)
(!!!!!) (2nd Best Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 (1.2/1.3ma and 1.2/1.4ma) 1-2% matched (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!!) (Best Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 (1.4/1.45ma and 1.5/1.6ma) 1-2% matched (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!!) (BEST PHONO PAIR) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (1.6/2.0ma and 1.6/1.7ma) 1-3% matched (Aesthetix, EAR, Lamm, VTL, Jadis, Nagra)
(!!!!!) (Best Siemens Pair 1972) E83CC=12AX7 Siemens Halske Germany NOS triple mica 1972 printed in 1976 (1.0/1.3ma and 1.1/1.3ma) (best in phono stages and high end preamps)
(!!!!!) (Recommended Pair) EL84 Telefunken Germany <> bottom test like new 1960's (53ma and 57.4ma)
(!!!!!) (Recommended Single) ECC83=12AX7 Telefunken Germany smooth plates NOS 1963 (1.0/1.3ma and Gm=1500/1700)
(!!!!) (2nd Best Pair) 6U8A Sylvania NOS 1970 era (16/16.4ma and 12.2/12.8ma)
(!!!!) (2nd Best Pair) EF86 Telefunken Germany <> bottom NOS gray shield 1972 1-2% matched (3.0ma and 3.1ma) (U67 Neumann, Lawson, Soundelux, Manley)
(!!!!) (Best Overall Pair) ECC82=12AU7 Telefunken Germany <> Bottom smooth plates NOS 1961-1965 very good printing (9.8/10.9ma and 9.8/10.4ma) 1-5% matched
(!!!!) (BEST OVERALL PAIR) ECF80=6BL8 Mullard rebranded Philips NOS 1966 1-5% matched
(!!!!) (Best Overall Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 1% section balance (Gm=1800/1800) (1.5/1.5ma)
(!!!!) (Best Overall Single) EF86 Telefunken Germany <> bottom NOS gray shield 1972 (3.4ma) (Neumann, Lawson, Soundelux, Manley)
(!!!!) (Best Pair) 6DL5=EL95 Siemens Germany NOS 1968-1970 (24.5/24.6ma)
(!!!!) (Best Pair) 6DL5=EL95 Siemens Halske Germany NOS 1963 (25.5/27.5ma)
(!!!!) (Best Pair) 6U8A Philips by Sylvania NOS 1986 (19/18.8ma and 9.5/8.5ma)
(!!!!) (Best Pair) 6U8A Sylvania NOS 1970 era (19/19.6ma and 9/9.4ma)
(!!!!) (Best Siemens Pair) EL84 Siemens Halske Germany used/test like new 1971 (48.2ma and 48.5ma) (High Gm)
(!!!!) (Best Single) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates like new 1960 (10.6/10.2ma) (same Gm)
(!!!!) (Best Single) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (7.6ma)