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(!!!!) (Best Pair #2) 5U4GB RCA Super Airline and RCA NOS 1960's (58-60/40 and 59-60/40) 1-2% matched
(!!!!) (Best Pair #2) 6AC7 GE NOS 1980-1982 (10ma/11.2ma)
(!!!!) (Best Pair #2) 6GH8A GE by EI Yugoslavia NOS copper grid posts 1970's (16.8/12.8ma and 16.0/13.5ma)
(!!!!) (Best Pair #2) 6LQ6=6JE6C Raytheon Japan NOS 1970's (105ma and 108ma)
(!!!!) (Best Pair #2) 6U8A GE NOS 1959-1965 (13.5/11.5ma and 12.5/10.5ma)
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania NOS 1986 (17.4/8.3ma and 17.2/8.8ma) 1-3% matched
(!!!!) (Best Pair #2) EC92=6AB4 Siemens Halske NOS branded Philips 1967 (9ma and 9ma)
(!!!!) (Best Pair #3) 6EU7 RCA NOS 1967 (48-49/32 and 51-52/32)
(!!!!) (Best Pair #4) 6AC7 GE NOS 1979-1982 (8ma/7.8ma)
(!!!!) (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) 112A RCA NOS 1940's original boxes (7.6ma and 8.0ma) (same Gm)
(!!!!) (Best Pair) 12AT7 RCA NOS 1968-1970 (9.4/10.2ma and 9.4/10.5ma)
(!!!!) (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) 5963=12AU7 RCA NOS ribbed plates 1965-1973 (12.4/12.6ma and 11.4/11.6ma) (Highest mA and Gm)
(!!!!) (BEST PAIR) 5U4GB Raytheon NOS "O" getters 1962 (59-62/40 and 60-62/40)
(!!!!) (Best Pair) 5Y3GT Philips Holland NOS 1960's (60-64/40 and 60-65/40)
