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(!!!!!) (Best Pair #2) 12AX7=ECC83 Philips Miniwatt Holland NOS and like new 1965-1966 (1.3/1.5ma and 1.4/1.3ma) 1-3% matched
(!!!!) (Best Pair 1960) 12AX7 Philips Miniwatt Holland large "O" halo low hours/tests like new 1960 (1.0/1.3ma and 1.0/1.2ma) 1-3% matched
(!!!!) (Best Single 1966) 12AX7 Philips Holland NOS 1966 (Gm=1700/2100 and 1.2/1.7ma)
(!!!!) (Good Value Pair) 12AX7=ECC83 Philips Holland ribbed plates "O" getter halo used and like new (1.1/1.0ma and 1.1/1.0ma) 1-2% matched
(!!!!) 12BH7A Westinghouse gray ribbed plates used/good "U" getter 1960 era (8.4/11ma)
(!!!) (Best Single) 12AT7 Brimar UK branded Knight by Mullard black plates "O" getter NOS 1966 (9.2/10.2ma)
(!!!) (Best Value #1) 12AX7A RCA gray ribbed plates "O" getter halo NOS 1973 (1.0/0.9mA and Gm=1400/1550)
(!!!) (Best Value #2) 12AX7A RCA gray ribbed plates "O" getter halo NOS 1967 (0.9/1.1mA and Gm=1300/1500)
(!!!) (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
(!!!) (Best Value Single) 12AX7=ECC83 FISHER HOLLAND large "O" getter halo 1960 used/good (Gm=1550/1600 and .9/1.0ma)
(!!!) (Best Value Single) 12AX7=ECC83 FISHER HOLLAND large "O" getter halo 1961 used/good (Gm=1500/1600 and .9/.9ma)
(!!!) (Recommended SIngle) JAN-6922 Sylvania NOS 1977 (17.0/17.5ma)
(!!) (Best Single) 12AU7A Westinghouse gray plates "O" getter halo 1960's NOS (10.6/11.2ma)
(!!) (Best Single) 5687 Tungsol rebranded CBS black plates "U" getter NOS 1950's (38/48ma)
(!!) 12AX7 Baldwin Sylvania "D" getter used/tests like new 1959 (1.9/1.9ma) 1% section balance
(!!) 5751 Sylvania misbranded 12AX7WA NOS 1960's (1.9/1.9ma)
(!!) JAN-CRP-5687WA Raytheon black plates "O" getter halo 1962 used/tests like new (44.5/39ma)
