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(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (9.8/11.2ma)
(!!!) (Single) 6AS7G RCA branded GE black plates used/good 1953 (114/75ma)
(!!!) (Single) 6AS7G RCA branded GE clear top black plates used/good 1950 (64/65ma)
(!!) (Best Pair) 6F8G Raytheon black parallel ribbed plates NOS 1940's (8.8/7.8ma and 7.4/7.6ma) (same Gm)
(!!) (Best Single) 12AU7A Westinghouse gray plates "O" getter halo 1960's NOS (10.6/11.2ma)
(!!) (Best Single) 6550 Tungsol gray plate with vent holes NOS 1966 (163ma)
(!!) (BEST SINGLE) 6BL7GTA Tungsol NOS 1960 era (43/44ma)
(!!) (BEST SINGLE) 6BX7GT Sylvania triple mica NOS 1950's (55/57ma) (1-3% section balance)
(!!) (Best Value) 6AS7G RCA branded GE black plates used/tests like new 1954, base rattle, slight glass tilt, small stain on glass (108ma/122ma) (highest mA and Gm)
(!!) (Recommended from 1950's) 12AT7WA Sylvania gray plates triple mica "D" getter halo tests like new 1950's (9.4/12.0ma)
(!!) (Recommended Single) 6201=12AT7WA GE "5 STAR" NOS 1970 (8.0/9.2ma)
(!!) (Single) 5814WA GE NOS 1962-1963 (9/10.2ma)
(!!) (SINGLE) 6BL7GT Sylvania branded Tungsol triple mica NOS 1956-1957 (36.2/31.5ma)
(!!) 6AS7G Russian branded National NOS 1990's (50ma/86ma)
(!!) 6AS7G Russian branded National NOS 1990's (51ma/77ma)
(!!) JRC-12AU7 RCA NOS long gray plates mid-1950's "D" getter (9/11.6ma)
(!!)7025 Sylvania gray pinched plates "D" getter 1960 era used/good (Gm=2100/2100)
(!) (PAIR) 5BQ7A Dumont by GE gray plates NOS 1973 "U" and "O" getter (7.0/7.4ma and 7.0/6.6ma)
(!) (PAIR) 5BQ7A Dumont by GE gray plates NOS 1973 (8.3/8.0ma and 8.6/9.8ma)
(!) (Slightly microphonic) JG-5814A GE NOS triple mica "U" getter halo 1956 (10.2/10.4ma) 1-2% section balance (high Ma and Gm)
