Log in using the new customer accounts page.
(!!!!!) (Oldest Pair 1950's) ECC82=12AU7 Telefunken Diamond Bottom <> ribbed plates NOS 1955-1959 very good printing (9.2/9.0ma and 9.4/9.6ma)
(!!!!!) (Best Pair 1965) 12AU7=ECC82 Telefunken Germany <> bottom smooth plates NOS 1965 (10.6/10.4ma and 9.8/10.9ma) (Close Gm matching)
(!!!!!) (Best Overall Pair) ECC82=12AU7 Telefunken Diamond Bottom ribbed plates NOS 1958-1960 (9.0/10.2ma and 10/9.6ma) (Same Gm)
(!!!!) (Best Single) ECC82=12AU7 Telefunken Germany <> bottom smooth plates NOS 1966 (9.3/10ma) (High Gm)
(!!!) (Best Value Single) 12AU7=ECC82 Telefunken smooth plates like new 1963 (10/8.4ma)
12AX7 Telefunken Germany
(!!!!) (slightly microphonic single) ECC82=12AU7 Telefunken Diamond Bottom smooth plates NOS 1961 (10.0/10.8ma) (high Gm)
(!!!!) (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 Pair #1) 12AX7=ECC83 Telefunken Germany <> bottom branded GAP/R Computor tube <> bottom smooth plates used/good 1964 era (0.9/0.8ma and 1.0/0.8ma)
(!!!!) (Best Value Single) 12AX7 Telefunken Germany <> bottom smooth plates branded GAP/R Computor tube like new 1964 (Gm=1700/2000 and 1.1/1.5ma)
(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma) (strong Gm)
