(!!!) (Best 12AT7WC Single) JAN-12AT7WC Sylvania black plates NOS 1978 (9/10ma)
(!!!) (slightly microphonic) 12AU7A Westinghouse black plates "D" getter halo 1964 NOS (9.6/10.6ma) (similar to RCA black plates)
(read review) 12AY7 GE branded RCA gray plates "D" getter NOS 1954 (2.3/2.9ma)
(!!!) (Best 5-Star) 5814A=12AU7 GE Electronic Secretary "5 STAR" triple mica NOS 1960 (10.8/10.4ma) (Same Gm)
(!!!!) (Best Value Quad) 56 National Union rebranded Western Electronics NOS 1940's (5.5/5.5/5.6/5.9ma) (matched quad)
(!!!) (Best Mullard Single) 12AT7WA=CV4024=M8162 Mullard UK NOS 1964 (14/10ma)
(!!!) (Best Mullard Single) ECF80=6BL8 IEC Mullard UK NOS 1966 (16ma/12ma) (Highest mA and Gm)
(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1969-1977 (1.7/1.9ma and 1.6/1.8ma) (same Gm)
(!!!) (Best Overall Pair) JHS-6J6WA Sylvania NOS "D" getter halo 1960 (9.8/10.4ma and 9.8/10.5ma) (Highest Ma and Gm) 1-2% matched
(!!!) (Best Overall Single) 5842 Raytheon branded RCA NOS windmill getter galo 1967 (43.8ma Gm=32,000)
(!!!) (Best Overall Single) E80F=6084 Miniwatt SQ Holland Special Quality Gold Pins "D" getter NOS 1960 (3.2ma)
(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
(!!!) (Single) E81CC=12AT7WA Siemens Munich Germany NOS 1975 (10.8/9.3ma)
(!!!) (Best Pair) 30 Brimar BVA made in USA but might be made in UK in white boxes 1940's (3.1ma and 3.3ma)
(!!!) (Best Pair) 420A Western Electric NOS 1979 (1.6/1.9ma and 1.6/1.9ma)
(!!!) (Best Pair) 6AG7 RCA NOS 1950-1951 (31.5ma and 32.0ma)
(!!!) (Best Pair) 6BQ7A GE black plates "U" getter NOS 1957 (12.8/12.2ma and 11.0/11.6ma) (Highest mA and Gm)
(!!!) (BEST PAIR) 6DJ8 Matshushita JAPAN branded RCA NOS 1975 (19/18ma and 17/20ma)
(!!!) (Best Pair) 6HA5=6HM5=EC900 Amperex Holland "Globe Logo" NOS in white boxes 1971-1972 (12.0ma and 12.8ma)
(!!!) (Recommended Pair) 76 Sylvania NOS - 1 tube branded National Union 1947 era same build (5.3ma and 5.6ma)
