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(!!!!) (Best Pair #1) 7868 Sylvania tipped top used/tests like new 1960's (65ma and 66ma) (strong mA and Gm)
(!!!!) (BEST PAIR #1) EL84 Siemens Halske Germany NOS 1977 (46.5ma and 46ma)
(!!!!) (BEST PAIR #1) JAN-6005W GE NOS 1981 (47.8ma and 48.5ma) 1-3% matched
(!!!!) (BEST PAIR #1) JAN-CRC-6K6GT RCA black plate 1952 (42.5ma and 43ma)
(!!!!) (Best Pair #2) 5881 Tungsol used/strong 1951 (67ma and 71ma) (1st series made)
(!!!!) (Best Pair #2) 6973 RCA NOS NOS 1969 (45.5ma and 49.6ma)
(!!!!) (Best Pair #2) 6BQ5 GE NOS 1966-1980 same build (58.5ma and 60ma)
(!!!!) (Best Pair #2) 6L6GC GE NOS 1980 same date codes (73.0ma and 74.3ma) (close Gm)
(!!!!) (Best Pair #2) ECL86=6GW8 Siemens Halske branded Telefunken Germany NOS 1971 (1.0/1.1ma and 33ma/31.5ma) 1-3% matched
(!!!!) (BEST PAIR #2) JAN-6005W GE NOS 1980-1981 (47.4ma and 47.8ma) 1-2% matched
(!!!!) (Best Pair #2) JAN-6528A Cetron USA test like new 1987-1989 (102/110mA and 104/106.5ma)
(!!!!) (Best Pair #3) 5763 Sylvania JAN NOS 1974 (33ma and 34ma)
(!!!!) (Best Pair #3) 5881 Tungsol branded RCA used/good 1963 (60ma and 62ma)
(!!!!) (Best Pair #3) 6973 RCA NOS NOS 1969 (37.0ma and 39.5ma)
(!!!!) (Best Pair #3) 6BQ5 GE NOS 1970's-1982 same build (51ma and 55.6ma)
(!!!!) (BEST PAIR #3) 6L6GC GE NOS 1970-1978 (64.5ma and 67.2ma)
(!!!!) (Best Pair #3) 6L6GC GE NOS and like new 1980 (68.7ma and 69.0ma)
(!!!!) (Best Pair #4) 6DL5=EL95 Philips Mullard UK NOS 1965 (22.0/22.8ma) 1-5% matched
(!!!!) (Best Pair #4) 6V6GT GE black plate NOS 1954 (41.4ma and 42ma) 1-2% matched
(!!!!) (Best Pair #4) EL34 Svetlana SED Russian used/good 1997 (77ma and 78.5ma)
