(!!!!!) (2nd Best Pair) ECC33=6SN7GT Mullard UK black plates NOS pan shape getter halo 1950-1955 era (10.2/8.6ma and 9.5/8.6ma) (best sounding ECC33 of all-time)
(!!!!!) (3rd Best Pair) ECC33=6SN7GT Mullard UK black plates NOS pan shape getter halo 1950-1955 era (8.6/9.6ma and 8/10ma) (best sounding ECC33 of all-time)
(!!!!!) (Best Overall Pair) ECC33=6SN7GT Mullard UK black plates NOS pan shape getter halo 1950-1955 era (9.4/8.6ma and 9.4/8.4ma) 1-2% matched (best sounding ECC33 of all-time)
(!!!!!) (Best Pair) JAN-5687WA GE black plates like new 1968 (33.5/36.5ma and 35.0/34.2ma) (Highest Ma and Gm)
(!!!!!) (Best Single) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 tests like new (2.7/2.7ma) (1-2% section balance)
(!!!!!) (Best Sound for the Money Pair) JAN-12AT7WC Sylvania black plates NOS 1980 (7/8ma and 7.3/8.2ma)
(!!!!!) (Best Value Pair) 6SN7GTB RCA NOS and like new 1965 (8.2/10.2ma and 8.2/9.2ma) (same Gm) (warm and smooth)
(!!!!!) (Best Value Single) 6072 GE branded RCA triple mica black plates "O" getter halo 1960 used/good (2.0/2.0ma) (preamp, V1 position in amp)
(!!!!!) (Good Value Pair) 12BH7A RCA gray ribbed plates NOS and like new 1960's (7.3/8.6ma and 7.2/7.7ma)
(!!!!!) (Good Value Pair) 12BH7A Sylvania gray pinched plates NOS and used 1970 era (7.6/8.0.4ma and 7/7ma)
(!!!!!) (Good Value Pair) 6350 Sylvania rebranded United black ribbed plates NOS large "U" getter halo 1950's (9.6/9.8ma and 9.2/9.8ma) (Emille Labs Cha'am)
(!!!!!) (Recommended Pair) 6350 Sylvania rebranded United black ribbed plates NOS large "U" getter halo 1955-1957 (10.5/10.9ma and 10.0/10.7ma) 1-3% matched
(!!!!!) (Recommended Single) JG-6072 GE triple mica black plates "O" getter NOS 1962 (3.1/3.2ma) (AKG, Tele 251, Peluso, Rode) (similar sound to 5-Star GE) (same Gm)
(!!!!!) (Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new (2.8/3.6ma) (mic grade)
(!!!!!) (Single) GL-6072 GE 5 star triple mica black plates "O" getter halo 1962 like new - faded printing (2.7/2.5ma) (mic grade)
(!!!!) (2nd Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing (2.6/2.7ma and 2.7/2.8ma) 1-3% matched (Same Gm)
(!!!!) (Best Brimar Single) CV4024=12AT7WA Brimar NOS square black plates 1975 (13.4/13.6ma)
(!!!!) (Best Overall Pair) JAN-12AT7WC Sylvania black plates NOS 1979-1980 (9.8/10ma and 10.8/9.8ma)
(!!!!) (Best Overall Pair) JAN-5755 Raytheon Black Plates NOS 1973-1979 (1.9/2.0ma and 1.9/1.9ma) (Highest mA and Gm) 1-2% matched
(!!!!) (Best Overall Single) CV4024=12AT7WA Brimar NOS square black plates 1966 (11.2./11.4ma)
