(!!!) (Best Sounding Pair) 80 Sylvania Philco NOS 1950 (54-57/40 and 56-58/40)
(!!!) (Best Value Pair) 6B4G Sylvania NOS 1952 same build (76ma and 80ma)
(!!!) (Best Value Pair) 807 RCA black plate used/good 1956-1957 getters like new (58.2ma and 56.5ma)
(!!!) (Recommended Pair) 6C8G National Union round black plates 1950 era used/very good (3.4/2.8ma and 3.3/3.4ma) (very close Gm)
(!!!) (Single) 12AT7 GE gray plate NOS 1975 (8.4ma/6.8ma)
(!!!) (Single) 12AT7 GE gray plate NOS 1981 (8.4ma/6.8ma)
(!!!) (Single) 403A Western Electric NOS "D" getter 1957 (5.7ma)
(!!) (Best 403B Single) 403B=5591=6AK5 Western Electric NOS "O" getter halo 1958 (8.2ma) (special quality)
(!!) (Best Pair) JAN-CHS-6SL7WGT Sylvania brown base "square getter halo" like new faded printing (2.4/2.6ma and 2.4/2.4ma) 1-3% matched
(!!) (Best Single) 7AF7 Sylvania branded Hytron NOS round black plates NOS 1952 (9.6/9.4ma) 1-3% section balance
(!!) (Best Single) JW-6AK5 Western Electric NOS "D" getter 1953 (6.2ma)
(!!) (Best Value Single 1953) 12AU7 Sylvania black plates "D" getter used/strong 1953 no printing (9.6/11.8ma)
(!!) (Recommended Single) 5Y3GT Hytron NOS 1951 (56/40 and 60/40)
(!!) (Single) 403B=6AK5 Western Electric NOS "O" getter halo 1969 (5.3ma)
(!!) (single) 6SL7GT RCA NOS black plates gray coated glass 1959 (2.0/1.7ma)
(!!) (slightly microphonic pair) JAN-6SL7GT=VT-229 RCA NOS and like new 1940's (2.5/2.4ma and 2.4/2.6ma) 1-3% matched
(!!) (slightly microphonic) 12AU7A Raytheon black ribbed plates "D" getter halo black coated glass 1951 (8.8/9.6ma)
(!!) (slightly microphonic) 6SL7GT RCA NOS 1950 (2.2/2.3ma) 1-2% section balance
(!!) 403A=6AK5 Western Electric NOS 1974 (6.6ma)
(!!) 403B=6AK5 Western Electric NOS "D" getter 1969 (6.5ma)
