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(!!) (Best Value Used) ECC81=12AT7 Siemens Halske Germany "D" getter 1960 era used/good (8.8/7.5ma)
(!!) (Good Value Pair) 6384 Tungsol used/good 1967-1969 same build, 1 tube has slightly tilted glass (59.5ma and 60ma)
(!!) (Good Value Pair) ECC85=6AQ8 RCA Japan by Hitachi 1970's (10/15ma and 10.4/14.4ma)
(!!) (Good Value Single) 12AX7=ECC83 Telefunken Germany <> bottom ribbed plates used/very good 1960 era (Gm=1300/1400 and 1.1/1.1ma)
(!!) (Good Value Single) 12AX7A GE NOS 1976 (0.9/1.3mA and Gm=1400/1800)
(!!) (Good Value Single) 6922 Amperex PQ Holland gold pins used/good 1961 (10/19ma) (mic)
(!!) (Good Value Single) ECF80 VALVO FRANCE (La Radiotechnique) NOS 1962
(!!) (Good Value Single) JRP-5687WA Raytheon bronze plates used/good early 1960's (33/31.6ma)
(!!) (Good Value) 12AT7 Telefunken Diamond Bottom used/good early 1960's (7.8ma/10.8ma)
(!!) (Good Value) 12AT7 Telefunken Germany <> bottom used/good 1960's no printing (7.6ma/7.6ma) 1-2% section balance
(!!) (Good Value) 12AT7=ECC81 Siemens Halske Germany used/strong 1964 (8.2ma/12.2ma)
(!!) (Pair) 6BL7GTA Sylvania branded GE NOS 1968 (37.5/38.8ma and 41/35.6ma)
(!!) (Pair) 6S4A GE NOS 1969-1970 (24.0ma and 25.5ma)
(!!) (RCA Pair) 6CS7 RCA NOS 1962-1965 (17/11ma and 17/12.6ma)
(!!) (Recommended from 1950's) 12AT7WA Sylvania gray plates triple mica "D" getter halo tests like new 1950's (9.4/12.0ma)
(!!) (Recommended from 1958) JHS-12AT7WA Sylvania triple mica "D" getter NOS 1958 (11.6/15ma) (phase inverter, reverb)
(!!) (Recommended from 1964) 12AT7WA Sylvania NOS 1964 (7.0/8.4ma)
(!!) (Recommended Mullard Pair) EL36 Mullard branded International NOS 1969 (82ma and 88ma)
(!!) (Recommended Pair) 0B2 Amperex Globe Holland NOS 1970's made in Europe (argon gas)
(!!) (Recommended Pair) 0B2 Amperex Globe Holland NOS 1970's made in Japan (argon gas) (Copy)
