(!!!!) (Best Value Single) 12AX7 Telefunken Germany <> bottom smooth plates branded GAP/R Computor tube like new 1964 (Gm=1700/1600 and 1.1/1.0ma)
(!!!!) (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)
(!!!!) (Best Value Single) 12AX7 Telefunken Germany smooth plates branded DYNACO like new 1964 (Gm=1600/1800 and 0.9/1.4ma)
(!!!!) (Best Value Single) 6AS7G RCA gray plates NOS 1971 (60ma/78ma)
(!!!!) (Best Value Single) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 1-2% section balance (Gm=1550/1600) (1.1/1.1ma)
(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 (.8/1.2mA Gm=1400/1600)
(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 copper grid posts (.7/.8mA Gm=1400/1500)
(!!!!) (Best Westinghouse Single) 6SN7GTB Westinghouse USA black plates NOS 1963 (8.2/8.0ma)
(!!!!) (Good Single 1950) 12AU7 Sylvania black plates "D" getter NOS 1950 (11/12.8ma)
(!!!!) (Good Single) E88CC=6922 Philips SQ Holland used/tests like new 1968 (13.0/12.6ma) (3D MIDS, low noise) (same Gm)
(!!!!) (Good Value 1962) M8137=12AX7S Philips SQ France ribbed plates NOS 1962 (0.8/0.9ma and Gm=1350/1350) (Special Quality 12AX7)
(!!!!) (Good Value 1962) M8137=12AX7S Philips SQ France ribbed plates NOS 1962 (1.1/1.1ma and Gm=1550/1450) (Special Quality 12AX7)
(!!!!) (Good Value Pair) 12BH7A GE NOS gray oval plates "o" getter halo 1961-1965 (7.2/6.6ma and 8.4/6.8ma)
(!!!!) (Good Value Pair) 12SN7GTA GE coin-base side getter NOS 1981 (7.2/8.0ma and 7.2/8.0ma) 1-2% matched
(!!!!) (Good Value Pair) 12SN7GTA GE coin-base side getter NOS 1981 (7.4/7.4ma and 7.2/8.0ma) 1-5% matched
(!!!!) (GOOD VALUE PAIR) 408A Western Electric NOS 1972 and 1976 (78/60 and 80/60)
(!!!!) (Good Value Pair) 5842Q Raytheon NOS 1983 (19ma and 20ma) 1-3% matched
(!!!!) (Good Value Pair) 6FQ7 Philips by Sylvania NOS 1980 era (6.2/6.0ma and 6.0/6.2ma)
(!!!!) (Good Value Pair) 6FQ7 RCA clear top NOS 1970's (6.0/7.0ma and 6.6/7.6ma) (same Gm) (STAX, MARANTZ, CONRAD JOHNSON)
(!!!!) (Good Value Pair) 6J5GT Sylvania lightning logo NOS 1945-1946 (6.0ma and 6.2ma)
