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(!!!!) (Best Pair #3) 7247=12DW7 Mullard UK NOS rebranded RCA 1972 (1.0/11.4ma and 0.9/10.8ma) 1-3% matched
(!!!!) (Best Pair #3) 807 RCA black plate NOS 1969 (62ma and 59ma)
(!!!!) (Best Pair #4) 807 RCA black plate NOS 1969 (61ma and 59ma)
(!!!!) (Best Pair 1930's) 30 Sylvania engraved base NOS 1930's (3.2ma and 3.4ma) (same Gm)
(!!!!) (Best Pair 1963) 5U4GB GE NOS 1963 same date codes (60-62/40 and 60-60/40 x 2 tubes)
(!!!!) (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 for the money) 5Y3GT Philips Holland NOS 1960's (60-66/40 and 60-66/40)
(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)
(!!!!) (Best Pair) 30 Sylvania NOS 1946 (3.4ma and 3.8ma) (same Gm)
(!!!!) (Best Pair) 5751 RCA black plates NOS 1976 (2.5/3.1ma and 2.5/2.8ma) (Best Audio Grade 5751)
(!!!!) (Best Pair) 5Y3GT Philips Holland NOS 1960's (60-64/40 and 60-65/40)
(!!!!) (Best Pair) 6BQ7A RCA black plates NOS 1967 same date codes (15/14.5ma and 13.5/16.5ma)
(!!!!) (BEST PAIR) 6EU7 Tungsol Dumont "D" getter NOS 1963 (50-51/32 and 49-52/32) 1-3% matched
(!!!!) (BEST PAIR) 6F8G=VT-99 Raytheon NOS 1945 era (8.6/10.2ma and 9.8/9.0ma)
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1950 (1.0ma and 1.0ma) 1-2% matched **
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1950-1953 (1.0ma and 1.0ma) 1% matched **
(!!!!) (BEST PAIR) 6SQ7 RCA NOS 1953 (1.0ma and 1.0ma) 1% matched **
(!!!!) (Best Pair) 6U8A Philips by Sylvania NOS 1986 (14/10ma and 14.2/9.6ma)
(!!!!) (Best Pair) 7189 Sylvania black plates NOS 1970 era (42ma and 46ma)
(!!!!) (BEST PAIR) 811A GE made by RCA NOS 1950's (55/36 and 56/36)
