(!!!!) (Best Single) 6550C Svetlana Russian NOS 1996 (149.4ma)
(!!!!) (Best Used Pair) 6550C Winged C by Svetlana Russian used/good 2001 faded top getters (135ma and 140ma) (Gm like new) **
(!!!!) (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 Pair) 6550C Winged C by Svetlana Russian used/good 2001 faded top getters (156ma and 159ma) **
(!!!!) (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)
(!!!!) (Recommended Used Pair) 6550C Svetlana Russian used/good 1997-2000 (135ma and 136ma) ** (1-3% matched)
(!!!!) (Used Pair) 6550C Winged C by Svetlana Russian used/good 2000-2001 faded top getters (116ma and 120ma) (same Gm) **
(!!) 6AS7G Russian branded National NOS 1990's (50ma/86ma)
(!!) 6AS7G Russian branded National NOS 1990's (51ma/77ma)
(!!) 6AS7G Russian branded National NOS 1990's (62ma/65ma)
(!) (Best Value) 12AX7A China tests like new 1990's (1.1/1.2mA and Gm=1800/1900)
(!) (Best Value) 7025A=12AX7A China branded International Yugo NOS 1990's (1.0/0.9ma and Gm=1700/1600)
