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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 QUAD) JAN-6550A GE NOS 1985-1986 (130.2ma, 131ma, 131.2ma, 132.6ma) 1-3% matched
(!!!!!) (RECOMMENDED QUAD) JAN-6550A GE NOS 1985-1986 (129ma, 130ma, 131ma, 129.5ma) (Close Gm)
(!!!!) (Best Single) 6550 Tungsol branded RCA NOS vented plate NOS 1965 (130ma) (Recommended for Audio Research Ref power supply)
(!!!!) (Best Value Like New Pair) 6550C Svetlana Russian low hours/like new 2011 (132ma and 136ma) (strong Gm) **
(!!!!) (Best Value Pair) 6550C Svetlana Russian used/test like new 1998 (140ma and 142ma)
(!!!!) (Best Value Single) 6550 Tungsol branded Sylvania smooth gray plate used/tests like new 1960 era (138ma)
(!!!!) (Best Value Single) 6550C Winged C by Svetlana Russian like new 2011 tilted glass (154ma)
(!!!!) (Best Value Used Pair) 6550C Winged C by Svetlana Russian used/good 2000-2001 faded top getters (126ma and 125ma) (Close Gm) **
(!!!!) (READ REVIEW) 6550C Winged C Svetlana Russian like new 2001 (156.8ma and 159ma) (close Gm)
(!!!!) (Recommended Single) 6550C Svetlana Russian low hours/like new 1999 (149ma)
(!!) (Best Single) 6550 Tungsol gray plate with vent holes NOS 1966 (163ma)
(!!) (BEST VALUE) 6550A GE stapled plates NOS around 1980 (119ma) (nice single)
(!!) (Recommended Single) 6550A GE branded Westinghouse stapled plates NOS 1980 era (129ma)
(!!) (Recommended Single) 6550A GE rebranded RCA stapled plates NOS 1979 slightly tilted glass (136.5ma)
(!) (Single) 6550 Tungsol black plate used/good 1950's (115ma)
(!) (Single) 6550 Tungsol black plate used/good 1950's - guide pin broken off (123ma)
6550A GE stapled plates used/good 1980's (115ma)
