(!!!!) (Best Pair #2) JAN-5755 Raytheon Black Plates NOS 1973 (1.6/1.7ma and 1.7/1.8ma) (High Gm)
(!!!!) (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 Pair) JAN-12AT7WC Philips by Sylvania black plates NOS 1982 (9.8/10.6ma and 10.8/10.5ma)
(!!!!) (Best Pair) JAN-12AT7WC Sylvania black plates NOS 1975-1980 (10/8.6ma and 10.2/9.2ma)
(!!!!) (Best Raytheon Pair) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.8ma and 1.9/1.7ma)
(!!!!) (Best RCA 1955) 12AX7 RCA black plates "D" getter NOS 1955 (Gm=1800/2000 and 1.2/1.5ma) (rare tube)
(!!!!) (Best RCA Single 1964) 6201=12AT7WA RCA black plates NOS 1964 (9.8/7.4ma) (best tone)
(!!!!) (Best Single 1950's) ECC33=6SN7GT Mullard black plates platter getter halo NOS 1950-1955 (10.2/12.2ma)
(!!!!) (Best Single 1958) 5751 Sylvania black plates triple mica D getter halo 1958 like new (2.5/2.3ma)
(!!!!) (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) 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) 5692 RCA RED BASE black plates like new 1950 (10.0/9.2ma)
(!!!!) (Best Single) CV181=ECC32 Mullard black base black plates NOS 1950's (6.6/6.3ma)
(!!!!) (Best Single) ECC33 Mullard gray plates "D" getter halo NOS 1961 (9/9ma) 1-2% section balance
(!!!!) (Best Value Pair) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 used/test like new (2.1/2.0ma and 2.1/2.1ma) 1-2% matched (Same Gm)
(!!!!) (Best Value Pair) JAN-12AT7WC Sylvania black plates NOS 1980 (8.6/7.6ma and 9.0/7.5ma)
(!!!!) (BEST VALUE PAIR) JTL-5687 Tungsol black plates "U" getter used/good 1950's faded printing (29/34ma and 30/32ma)
(!!!!) (Best Value Single) 12AX7 Raytheon Black Plates NOS 1962 (.9/1.1ma and Gm=1400/1600)
(!!!!) (Best Value Single) 6AS7G RCA gray plates NOS 1971 (60ma/78ma)
