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(!!!!) (BEST PAIR #2) EL37 Mullard UK branded Amperex gray plates used/good 1968 (73.5ma and 72ma)
(!!!!) (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 used/good 1960's (63.2ma and 66ma)
(!!!!) (Best Pair #3) 6BQ5 GE NOS 1970's-1982 same build (51ma and 55.6ma)
(!!!!) (Best Pair #3) 807 RCA black plate NOS 1969 (62ma and 59ma)
(!!!!) (Best Pair #3) EL34 Mullard branded Philips NOS XF4 1976-1979 (88.5ma and 89.2ma) (Same Gm)
(!!!!) (Best Pair #4) 6DL5=EL95 Philips Mullard UK NOS 1965 (22.0/22.8ma) 1-5% matched
(!!!!) (Best Pair #4) 807 RCA black plate NOS 1969 (61ma and 59ma)
(!!!!) (Best Pair #4) EL34 Mullard UK branded Mullard and Telefunken XF2 "O" getter halo NOS 1969 (85.5ma and 83.2ma) 1-3% matched (best sound for the money)
(!!!!) (Best Pair #4) EL34 Mullard UK branded Mullard and Telefunken XF2 "O" getter halo NOS 1969 (93.2ma and 89.5ma) 1-5% matched (best sound for the money)
(!!!!) (Best Pair #5) 6DL5=EL95 Philips Mullard UK NOS 1965 (24.8/26.0ma)
(!!!!) (Best Pair 1940's) 6L6GA Sylvania and Philco Sylvania coated glass NOS 1944 (67ma and 67.2ma)
(!!!!) (Best Pair 6L6GB) 6L6GB RCA and RCA branded Tungsol black plate double "D" getters low hours/like new 1950's (78.5ma and 80ma) (rare)
(!!!!) (Best Pair) 30 Sylvania NOS 1946 (3.4ma and 3.8ma) (same Gm)
(!!!!) (Best Pair) 5881 GE Canada NOS 1965-1970 (73ma and 73.5ma) (same internal build and sonics as 5881 Tungsol)
(!!!!) (Best Pair) 6L6GC GE NOS and like new 1980 (68.7ma and 69.0ma)
(!!!!) (Best Pair) 6V6GT GE coated glass NOS 1952-1954 (46.8ma and 47.5ma)
(!!!!) (Best Pair) 6V6GT Sylvania coated glass black plates NOS 1950's (45.5ma and 47ma)
(!!!!) (Best Pair) 7189 Sylvania black plates NOS 1970 era (42ma and 46ma)
