(!!!!) (Single 1959) EF86 Ferranti Mullard UK mesh shield like new 1959 (2.9ma)
(!!!!) (Best Overall Pair) 407A Western Electric like new 1965-1966 (46-47/26 and 47-48/26) (Highest Testing Pair)
(!!!!) (BEST OVERALL PAIR) ECF80=6BL8 Mullard rebranded Philips NOS 1966 1-5% matched
(!!!) (Best Pair) EF86 Telefunken Germany <> bottom NOS gray shield 1972 1% matched (3.2ma and 3.2ma) (Neumann, Lawson, Soundelux, Manley)
(!!!!) (BEST PAIR #3) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.7ma and 1.8/1.8ma)
(!!!!) (BEST PAIR 1960's) 6DJ8 Sylvania NOS 1960's (17.0/17.8ma and 14.5/19ma)
(!!!!) (Best Pair) 102F Western Electric NOS 1967 large getters (1.0ma and 1.1ma) (High Ma and Gm)
(!!!!) (Best Pair) 1L6 Sylvania NOS 1950 same date codes (20/16 and 19/16)
(!!!!) (Recommended Pair) 27 Philco by Sylvania NOS 1940's (5.7ma and 5.5ma)
(!!!!) (Best Overall Pair) 27 Philco by Sylvania NOS 1940's (6.7ma and 6.7ma) 1% matched
(!!!!) (BEST PAIR) 309A Western Electric NOS 1960 (4.8ma and 5.1ma) (same Gm)
(!!!!) (Best Pair) 311B Amperex made in Russia NOS 1977 (34.2ma and 34.5ma) (very good construction)
(!!!!) (Best Pair) 5842Q Raytheon NOS 1983 (22ma and 23ma) 1-3% matched
(!!!!) (Best Pair) 6189W Sylvania NOS 1976-1979 (9.5/9.6ma and 9.2/10.2ma) 1-3% matched
(!!!!) (Best Pair) 6AC7 RCA NOS 1960's (11ma and 11.8ma)
(!!!!) (Best Pair) 6AC7 RCA NOS 1961-1962 (10.3ma and 10.6ma)
(!!!!) (2nd Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (5.8/6.1ma and 58/62ma)
(!!!!) (Best Pair) D3a=7721 Siemens Germany NOS 1978 (32.5/33ma) 1% matched
(!!!!) (Best Pair) ECC84=6CW7 Ultron East Germany by RFT 1970's 1-2% matched (10.2/10.4ma and 10.2/10.6ma)
(!!!!) (Best Raytheon Pair #3) JAN-5755 Raytheon Black Plates NOS 1971 (1.8/2.0ma and 1.7/2.1ma)