(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)
(!!!!) (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 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 Pair) EL34 Winged C SED Russian NEW 2002 (93.5/95.3ma)
(!!!!) (Recommended Pair) EL34 Winged C SED Russian NEW 2005 (97.0/99.2ma)
(!!!!) (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) **
(!!!) (2nd Best Pair) 311B Amperex made in Russia NOS 1977 (31.8ma and 33.2ma) (very good construction)
(!!!) (Recommended Pair) 311B Amperex made in Russia NOS 1977 (37.2ma and 38.5ma) (Highest mA and Gm)
(!!) EL84 Ultron USSR Russia used 1990 era (32ma)
EL34 Winged C SED Russian NEW 2005 (89.5ma)
EL34 Winged C SED Russian NEW 2006 (75.5ma)
