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!!!) (Best Single) 8417 Sylvania NOS 1970's (110.5ma)
!!!) (Best Single) 8417 Sylvania NOS 1970's (113.5ma)
(!!!!!) (Recommended Pair) 8417 Sylvania NOS 1970's same build (108ma and 114.5ma) (close Gm)
(!!!!) (Best Quad) 8417 RCA by Sylvania NOS 1970's (95.5, 96, 98, 99.6ma)
(!!!!) (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 Pair) 8417 Sylvania branded RCA NOS 1960's - 1970 (106ma and 108ma)
(!!!) (Best Single #3) 8417 Sylvania NOS 1970 era (106.5ma)
(!!!) (Best Single #4) 8417 Sylvania NOS 1970 era (80ma)
(!!!) (Best Single 1956) 12BH7A GE gray oval plates NOS "U" getter 1956 (10/9.8ma)
(!!!) (Best Single) 8417 Sylvania NOS 1970 era (111ma)
(!!!) (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)
(!!!) 12BH7A GE gray oval plates NOS "o" getter 1964 (11.4/10.2ma) (strong Gm)
(!!!) 8417 GE NOS 1986 (103.5ma)
(!!) (Best Single) 12BH7A Channel Master Japan by Hitachi 1959 (14.2/13.2ma) (McIntosh, Quicksilver, Art Audio, Wells)
(!!) (Best Value Pair) 12BH7A Channel Master Japan by Hitachi NOS 1962 (10/15ma and 10.6/11.8ma)
