(!!!!) (Best Single) EC92=6AB4 Telefunken Germany <> bottom NOS 1969 (9.0ma)
(!!!!) (Best Single) EC92=6AB4 Telefunken Germany <> bottom NOS 1969 (9.2ma)
(!!!!) (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)
(!!!!) (Best Single) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (8.0ma)
(!!!!) (Best Value Pair) 12AX7 Telefunken Germany <> bottom ribbed plates used/very good 1960 era (1.0/1.2ma and 1.0/1.1ma) 1-5% matched
(!!!!) (Best Value Pair) 12AX7=ECC83 Telefunken Germany <> bottom smooth plates used/good 1960's (0.8/0.8ma and 0.8/1.0ma)
(!!!!) (Best Value Single) 12AX7 Telefunken Germany smooth plates branded DYNACO like new 1964 (Gm=1600/1800 and 0.9/1.4ma)
(!!!!) (Best Value Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 1-2% section balance (Gm=1550/1600) (1.1/1.1ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (16.4/16.8ma and 9.2/9.2ma)
(!!!!) (Recommended Pair) 6U8A Philips by Sylvania NOS 1986 (17.2/17.6ma and 8.4/8.6ma)
(!!!!) (Recommended Pair) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates used/tests like new 1960's (9.2ma/8.4ma and 9.3/9.4ma)
(!!!!) (Recommended Pair) ECC82=12AU7 Telefunken Germany <> Bottom smooth plates NOS 1960's - 1970 faded printing (8.2ma/8.6ma and 8.8/9.2ma)
(!!!!) (Recommended Pair) EL84 Telefunken Germany <> bottom NOS 1963-1966 (68ma and 69.5ma) (recommended for FIXED-BIAS amp only due to high current)
(!!!!) (Recommended Single) E188CC=7308 Telefunken <> bottom gold pins low hours/tests like new (16.0ma/16.2ma) (rare)
(!!!!) (Recommended Single) E188CC=7308 Telefunken <> bottom gold pins NOS 1960's (12.6ma/19ma) (rare)
(!!!!) (Recommended Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom gold pins tests like new 1966 (1.3/1.5ma and Gm=1600/1800)
(!!!!) (Recommended Single) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates like new 1960 (14.0/11.2ma) (Close Gm) (Highest mA and Gm)
(!!!!) (Recommended Single) EF86 Telefunken Germany <> bottom NOS gray shield 1972 (3.0ma) (Neumann, Lawson, Soundelux, Manley)
(!!!!) (Single) EF89=6DA6 Telefunken Germany <> bottom NOS 1966 (7.0ma)