(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)
(!!!!) (Best Pair) 6550C Svetlana Russian NOS 1998 (158.4ma and 159ma)
(!!!!) (Best Pair) 6550C Svetlana Russian NOS 1998 (163ma and 167ma)
(!!!!) (Best Value Like New Pair) 6550C Svetlana Russian like new 2011 (143ma and 144ma) (same Gm)
(!!!!) (Best Value Like New Pair) 6550C Svetlana Russian like new 2011 (148ma and 150.4ma)
(!!!!) (Best Value Pair) 6550C Svetlana Russian like new 2001 (156.8ma and 159ma) (close Gm)
(!!!!) (Best Value Pair) 6550C Svetlana Russian NOS 2011 (141.5ma and 145.4ma)
(!!!!) (Best Value Used Pair) 6550C Svetlana Russian used/good 2011 (132.2ma and 135.2ma) (same Gm)
(!!!!) (Best Value Used Pair) 6550C Svetlana Russian used/good 2011 faded printing (148.2ma and 144.0ma) (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)
(!!!!) (Used Pair) 6550C Svetlana Russian used/good 2000-2001 (150ma and 152.5ma)
(!!!!) (Used Pair) 6550C Svetlana Russian used/good 2000-2003 (141ma and 141.2ma)
(!!!!) (Used Pair) 6550C Svetlana Russian used/good 2001 (134.6ma and 137ma)
(!!!!) (Used Pair) 6550C Svetlana Russian used/good 2001 faded top getters (146.2ma and 149.6ma)
(!!!) (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)
(Best Quad) 6550C Svetlana Russian NOS 1996-1999 (143.4, 144.6, 144.8, 144.2ma)
EL34 Winged C SED Russian NEW 2005 (89.5ma)