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(!!!) (Best Pair #1) 6GM5 Sylvania rebranded Tungsol and Sylvania NOS 1960 era (59ma and 60ma)
(!!!) (Best Pair #1) EL84 Siemens Halske Germany NOS 1967-1968 (48.5ma and 49ma) 1-3% matched
(!!!) (BEST PAIR #2) 47 RCA branded ARCTURUS NOS 1940's (40ma and 40.2ma)
(!!!) (Best Pair #2) 6094 Bendix NOS and like new 1956-1957 (49.5ma and 53.5ma) (1st series)
(!!!) (Best Pair #2) 6146B RCA NOS 1970's (92ma and 91.5ma)
(!!!) (Best Pair #2) 6973 RCA black plate NOS and like new 1959 (44ma and 42.5ma)
(!!!) (BEST PAIR #2) 6AU5GT GE gray plates NOS 1960's (66.5ma and 65ma)
(!!!) (Best Pair #2) 6L6GA Philco Sylvania and Sylvania coated glass NOS 1944 (76ma and 78.5ma) (Highest mA and Gm)
(!!!) (BEST PAIR #3) 47 RCA branded ARCTURUS NOS 1940's (40.5ma and 42ma)
(!!!) (Best Pair #3) 6AQ5A GE NOS 1960-1975 (46.5ma and 49.6ma)
(!!!) (Best Pair #3) EL84 Siemens Halske Germany NOS 1963 (47ma and 48.2ma)
(!!!) (Best Pair #3) EL84 Siemens Halske Germany NOS 1969-1971 (54.0ma and 57.6ma) (Highest mA and Gm)
(!!!) (Best Pair from 1959) EL84 Wien Austria same build and sound as Holland 1959 (38ma and 39ma)
(!!!) (Best Pair) 1625 National Union NOS 1944 (90/40 x 2 tubes)
(!!!) (Best Pair) 1625=VT-136 National Union NOS 1943-1944 (87/40 and 90/40)
(!!!) (BEST PAIR) 6AU5GT GE gray plates NOS 1960's (75ma and 74ma)
(!!!) (Best Pair) 6F6GT GE coated glass NOS 1951-1952 (36ma and 39.5ma)
(!!!) (Best Pair) 6F6GT Sylvania and Sylvania Philco NOS 1950-1952 (40ma and 41.5ma) (close Gm)
(!!!) (Best Pair) 6F6GT Sylvania branded GE NOS 1962-1964 (39.5ma and 41ma) (close Gm)
(!!!) (BEST PAIR) 6JB6A RCA branded GE NOS 1960's (80ma and 86ma)
