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(!!!!!) (BEST OVERALL QUAD) JAN-6550A GE NOS 1985-1986 (135ma, 135.6ma, 134.5ma, 135.8ma)
(!!!!!) (Best Pair #1) JAN-6550A GE NOS "stapled plates" 1985-1986 (135ma and 135.5ma) 1-3% matched
(!!!!!) (Best Pair #2) JAN-6550A GE NOS "stapled plates" 1985-1986 (125.6ma and 126ma) 1-3% matched
(!!!!!) (Best Pair) JAN-5691 Philips by Sylvania black plates NOS 1984-1985 (2.0/2.2mA and 2.1/2.4mA) (Best 6SL7GT sub) (same internals as 5691 red base) 1-3% matched
(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (130.2ma, 131ma, 131.2ma, 132.6ma) 1-3% matched
(!!!!!) (Best Value Single) JAN-5691 Philips by Sylvania black plates NOS 1985 (2.4/2.6ma) (Best 6SL7GT sub)
(!!!!!) (Best Value Single) JAN-5691 Sylvania black plates NOS 1979 (2.1/2.1ma) (Best 6SL7GT sub)
(!!!!!) (RECOMMENDED QUAD) JAN-6550A GE NOS 1985-1986 (129ma, 130ma, 131ma, 129.5ma) (Close Gm)
(!!!!) (Best Pair 1963) JG-5751 GE double mica gray plates NOS 1963 (2.0/2.2ma and 2.0/2.1ma)
(!!!!) (Best Pair) 0A3 GE NOS 1956-1961 (neon)
(!!!!) (Best Value Pair) 211=VT-4-C GE NOS 1942-1945 side getters faded (108ma and 110.4ma)
(!!!!) (Best Value Pair) Recommended Single) JAN-7308 Raytheon NOS 1968 (15.2/10.4ma and 16.8/12.5ma)
(!!!!) (Best Value Single) JAN-6922 Amperex USA like new 1971 (13.4/12.6ma)
(!!!!) (Pair) 807 RCA black plate used/good 1940's (58.5ma and 62ma)
(!!!) (Best Single) JAN-6X4WA Sylvania NOS 1978 (56/40 and 56/40)
(!!!) (Best Value Pair) 5751 GE double mica gray plates NOS 1979-1981 (2.4/2.5ma and 2.3/2.6ma)
(!!!) (Best Value Single) 12AX7 Baldwin Sylvania "D" getter used/tests like new 1959 (2.1/2.0ma) (Highest mA and Gm) 1-2% section balance
(!!!) (Recommended Pair 1963) JG-5751 GE double mica gray plates NOS 1963 (2.0/1.9ma and 1.9/1.8ma) (same Gm)
(!!!) (Recommended Pair) 12AX7 Baldwin Sylvania "D" getter used/very good 1959 (1.7/1.8ma and 1.9/1.6ma)
(!!!) (Recommended Single 1963) JG-5751 GE double mica gray plates NOS 1963 (2.2/2.4ma)
