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(!!!!!) (Recommended Pair) 12BH7A GE ribbed plates NOS 1970's (9.6/10.4ma and 8.2/9.6ma) (sweet sound)
(!!!!) (Best Quad) 8417 RCA by Sylvania NOS 1960's - 1970's (100, 101.6, 103, 102ma)
(!!!!) (Best Quad) 8417 RCA by Sylvania NOS 1970's (95.5, 96, 98, 99.6ma)
(!!!!) (Factory Matched Pair) 8417-P Sylvania NOS same build 1960's (84ma and 85.5ma)
(!!!!) (Factory Matched Pair) 8417-P Sylvania NOS same build 1960's (92ma and 92.5ma)
(!!!!) (Recommended Pair) 12BH7A GE branded Zenith and Daystrom gray oval plates "O" getter NOS 1960's (11.0/11.3ma and 10.3/10.5ma)
(!!!!) (Recommended Pair) 8417 Sylvania branded RCA NOS 1972-1973 (119.2ma and 123.7ma)
(!!!!) (Single) 12BH7 Tungsol branded Shield gray oval plates "U" getter halo NOS 1961 (11.8/16.5ma) (Highest mA and Gm)
(!!!!) (Single) 12BH7A GE gray oval plates NOS mid-1960's (11.5/16ma)
(!!!) (Best Single 1957) 12BH7A GE NOS gray oval plates large "U" getter halo 1957 (12.5/11.0ma)
(!!!) (Best Single) 8417 Sylvania NOS (121ma)
(!!!) (Best Single) 8417 Sylvania NOS 1970 era (111ma)
(!!!) (Best Single) JAN-6X4WA Sylvania NOS 1978 (56/40 and 56/40)
(!!!) (Best Sylvania Single) 8417 Sylvania NOS branded Westinghouse NOS 1973 (113mA)
(!!!) (Recommended Pair) 8417 GE NOS 1969 and 1986 same build (91ma and 94.6ma)
(!!!) (Single) 8417 Sylvania branded Dumont NOS 1980 (84ma)
(!!!) 8417 GE NOS 1986 (103.5ma)
(!!) (Best Pair) 8417 Sylvania NOS 1970 era same date codes (112.2ma and 114.5ma)
(!!) (Best Value Single) 12BH7A Hitachi Japan 1970's branded Westinghouse NOS 1984 (11.8/12.9ma) (McIntosh, Quicksilver, Art Audio, Wells)
(!!) (Recommended Pair) 8417 Sylvania branded RCA NOS 1960's - 1970 (106ma and 108ma)
