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(!!!!) (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 GE NOS 1974-1977 (15.0/10ma and 16.5/10.4ma)
(!!!!) (BEST PAIR) JAN-6005W GE NOS 1980-1981 (49.2ma and 48.4ma) 1-2% matched
(!!!!) (Best Quad #1) 6L6GT Russian branded Raytheon NOS 1970's in white boxes (71.0/71.2/71.5/71.8ma) (not a sub for 6L6GC)
(!!!!) (Best Quad #1) 6L6GT Russian branded Raytheon NOS 1970's in white boxes (73.2/73.5/74/74ma)
(!!!!) (Best Quad #1) 6SH7 GE metal can NOS 1976 (10.6, 10.6, 10.4, 10.5mA)
(!!!!) (Best Quad #2) 6L6GT Russian branded Raytheon NOS 1970's in white boxes (68/67.5/69/70ma)
(!!!!) (Best Quad) 6L6GT=6n3C Russian NOS 1982 in white boxes (64.5/65.6/65/66.5ma)
(!!!!) (Best Quad) 6L6GT=6n3C Russian NOS 1982 in white boxes (66.2/67.2/67.0/68.2ma)
(!!!!) (Best Quad) 6L6GT=6n3C Russian NOS 1982 in white boxes (70/70.5/71.6/72.0)
(!!!!) (Best Quad) 8417 RCA by Sylvania NOS 1960's - 1970's (100, 101.6, 103, 102ma)
(!!!!) (Best Quad) 8417 RCA by Sylvania NOS 1970's (95.5, 96, 98, 99.6ma)
(!!!!) (Best Quad) EZ81=6CA4 RFT East Germany (Funkwerk) NOS 1970's (1 quad)
(!!!!) (BEST RCA PAIR) 6EU7 RCA NOS 1970 (49-51/32 and 51-52/32)
(!!!!) (Best Single #1) 6C10 GE rebranded RCA NOS 1960's (Ampeg / Fender) (1.3ma/1.3ma/1.0ma)
(!!!!) (Best Single #1A) 6C10 RCA branded Westinghouse NOS 1971 (Ampeg / Fender) (1.4ma/2.0ma/1.5ma) (Strongest Single)
(!!!!) (Best Single #2) 5670W GE JAN NOS 1986 (9.0/9.8ma) 1-5% balance (Highest Gm)
(!!!!) (Best Single #2) 6146B GE NOS 1981 (107ma)