(!!) (PAIR) 6BQ6GTB=6CU6 Sylvania NOS 1960's (48.5ma and 48.6ma)
(!!) (PAIR) 6BQ6GTB=6CU6 Sylvania NOS 1960's (51ma and 52.5ma)
(!!) (Recommended Pair) 448A Western Electric tipped top used/good 1965 same date codes (26ma and 27.5ma) (close Gm matching)
(!!) (Recommended Single) 12AU7A RCA clear top NOS 1973 (11.6ma/12.6ma) (High Gm)
(!!) (Recommended SINGLE) 6C4WA GE JAN NOS 1972 (10.6ma)
(!!) (Recommended Single) 6U8A GE NOS 1977 (14.2ma/10ma)
(!!) (Recommended SINGLE) JAN-6C4WA GE NOS 1967-1968 (9.8ma)
(!!) (Recommended SINGLE) JG-6C4WA GE JAN triple mica NOS 1964-1965 (9.2ma)
(!!) (Single) 5963=12AU7 GE NOS 1981 (9.4/11.4ma)
(!!) 12AU7A RCA CANADA NOS "D" getter halo 1950's tip is chipped (10.0/10.4ma)
(!!) 12AU7A RCA clear top used/good 1960's (7.4/8.6ma)
(!!) 12AU7A RCA clear top used/good 1964 (8.2/8.6ma)
(!!) 6E5 RCA NOS 1940's (2 in stock)
(!!) 6E5 Sylvania NOS (2 in stock)
(!!) EL84 Ultron USSR Russia used 1990 era (32ma)
(!!) JRC-12AU7 RCA NOS long gray plates mid-1950's "D" getter (9/11.6ma)
(!) (- BEST VALUE) 6AU5GT GE gray plates NOS 1960's (1 pair: 55ma and 56ma)
(!) (Best Single) JAN-6AH6WA Sylvania NOS 1968 (11ma)
(!) (Best Single) JAN-6AH6WA Sylvania NOS 1969 (13ma) (Highest mA and Gm)
(!) (Best Value Pair) ECC84=6CW7 Ultron East Germany by RFT 1970's 2-3% matched (9.6/11.6ma and 9.0/11.0ma)
