(!!!!!) (Recommended Pair) 5881 GE Canada NOS 1966-1967 (65.2ma and 68.5ma) (same build as Tungsol)
(!!!!!) (Recommended Pair) 6C4C=6B4G Russian NOS 1955 and 1968 (91ma and 96ma) (these are some of the best sounding 6B4G ever made)
(!!!!!) (Recommended Pair) 6V6GT Mullard UK gray plate NOS 1960 era (41.5ma and 42.8ma)
(!!!!!) (Recommended Pair) 6V6GT Mullard UK NOS 1960 era (44ma and 46.2ma)
(!!!!!) (Recommended Pair) EL84 Telefunken Germany <> bottom used/good 1960-1963 (45ma and 45.2ma) 1-2% matched
(!!!!!) (RECOMMENDED QUAD) JAN-6550A GE NOS 1985-1986 (129ma, 130ma, 131ma, 129.5ma) (Close Gm)
(!!!!!) (Recommended Single) KT88 GEC UK used/tests like new 1960's (137.6ma, Gm=10,800)
(!!!!!) (Recommended XF2 Pair) EL34 Mullard UK XF2 single halo "O" NOS 1969-1970 (87.6ma and 90.5ma) (close Gm)
(!!!!!) (Single) 6V6GT Ken Rad coated glass NOS 1940's (40.5ma)
(!!!!) (2nd Best Single) ECL86=6GW8 Siemens Halske branded Telefunken Germany NOS 1971 (1.1/36.5ma)
(!!!!) (Best 6094 Quad) JAN-CEA-6094 Bendix gold pins NOS 1957 (55/57/57/58ma)
(!!!!) (Best 6V6GTA Single) 6V6GTA RCA NOS 1971 (45.6ma)
(!!!!) (Best Overall Pair) 6550 Tungsol gray plates NOS 1975 (139ma and 140.5ma)
(!!!!) (Best Overall Pair) 6L6G=VT-115A RCA black plate coated glass NOS mid-1940's (81ma and 82.8ma) (rare) (same Gm)
(!!!!) (BEST OVERALL Pair) 8068 GE NOS 1983 (46ma and 46ma)
(!!!!) (Best Overall Pair) EL34 Mullard branded Philips NOS XF4 1979 (85ma and 85.5ma)
(!!!!) (Best Overall Pair) JAN-6528A Raytheon NOS 1978 (132/138ma and 143/144ma)
(!!!!) (Best Overall Single) 50 RCA Cunningham engraved base NOS ST-19 around 1940 (61.5ma) (strong Ma and Gm)
(!!!!) (Best Pair #1) 6DL5=EL95 Philips Mullard UK NOS 1965 (26.0/26.4ma)
(!!!!) (Best Pair #1) ECL86=6GW8 Siemens Halske branded Telefunken Germany NOS 1971 (1.0/1.1ma and 44ma/45.5ma) 1-3% matched