(!!!!) (Best Brimar Single) CV4024=12AT7WA Brimar NOS square black plates 1975 (13.4/13.6ma)
(!!!!) (Best Overall Single) JAN-5998 Tungsol black plates top and side getter NOS 1966 (124ma and 119ma) (Close Gm)
(!!!!) (BEST PAIR #3) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.7ma and 1.8/1.8ma)
(!!!!) (Best Pair) 6J5G ATES ITALY round black plate NOS 1950's (8.8ma and 8.8ma) 1-2% matched
(!!!!) (Best Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new faded printing (2.8/2.9ma and 2.8/2.9ma) 1% matched
(!!!!) (Best Raytheon Pair #3) JAN-5755 Raytheon Black Plates NOS 1971 (1.8/2.0ma and 1.7/2.1ma)
(!!!!) (Best RCA Single 1964) 6201=12AT7WA RCA black plates NOS 1964 (9.8/7.4ma) (best tone)
(!!!!) (Best RCA Single) 6L6GC RCA black plate NOS 1960 (71.6ma)
(!!!!) (Best Single 1960's) 5691 RCA Red Base branded GE Black Plates NOS 1960's rebranded in 1970's (2.4/2.6ma)
(!!!!) (Best Single 1964) USN-CHS-5751W1 Sylvania NOS gray plates triple mica O getter halo 1964 (2.7/2.5ma) (same Gm)
(!!!!) (Best Single) 12BH7A GE ribbed plates NOS 1980 (10.0/10.2ma) 1-3% section balance
(!!!!) (Best Single) 12BH7A Sylvania rebranded GE black oval plates "U" getter NOS 1956 era (11.2/14ma)
(!!!!) (Best Single) 5814A RCA COMMAND SERIES NOS black plates 1964 (11/11ma) 1% section balance
(!!!!) (Best Single) CV181=ECC32 Mullard black base black plates NOS 1950's (6.6/6.3ma)
(!!!!) (Best Value Single) 12AX7 Raytheon Black Plates NOS 1962 (.9/1.1ma and Gm=1400/1600)
(!!!!) (Best Value Single) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/good (2.0/2.1ma)
(!!!!) (Good Single 1950) 12AU7 Sylvania black plates "D" getter NOS 1950 (11/12.8ma)
(!!!!) (Good Value Single) JRP-12AX7 Raytheon Black Plates NOS 1962 (Gm=1300/1500) (0.7/1.0ma)
(!!!!) (Good Value Single) JRP-12AX7 Raytheon Black Plates NOS 1962 (Gm=1300/1600) (0.7/1.1ma)
(!!!!) (Good Value Single) JRP-12AX7 Raytheon Black Plates NOS 1962 (Gm=1500/1700) (0.9/1.2ma)