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(!!!!!) (Best Overall Pair) JG-5687WA GE black plates NOS 1962 (37/38ma and 35/37ma) (low noise)
(!!!!!) (Best Pair #1) 6SN7GTB GE NOS 1965 same date codes (7.8/7.6ma and 8.6/8.0ma) (Schiit Freya, Rogue)
(!!!!!) (Best Pair #2) 5687WA and 5687WB GE black plates like new 1970's (39/38.5ma and 37/41ma) (Highest Ma and Gm)
(!!!!!) (Best Pair) JAN-5691 Philips by Sylvania black plates NOS 1984-1985 (2.0/2.2mA and 2.1/2.4mA) (Best 6SL7GT sub) (same internals as 5691 red base) 1-3% matched
(!!!!!) (BEST PAIR) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (15.5/18.4ma and 15.2/17.0ma)
(!!!!!) (Best Single) PCC88=7DJ8 Siemens Germany branded Pope NOS 1979 (14.2/14.5ma)
(!!!!!) (Best Value Single) JAN-5691 Philips by Sylvania black plates NOS 1985 (2.4/2.6ma) (Best 6SL7GT sub)
(!!!!!) (Best Value Single) JAN-5691 Sylvania black plates NOS 1979 (2.1/2.1ma) (Best 6SL7GT sub)
(!!!!!) (Recommended Pair) 5U4GB HYTRON NOS 1960 "O" getter halos (56-58/40 and 57-58/40)
(!!!!!) (Recommended Pair) 5U4GB HYTRON NOS 1960 "O" getter halos (60-64/40 and 60-66/40)
(!!!!!) (Recommended Single) ECC83=12AX7A Tungsram Hungary branded RCA NOS 1970's (Gm=1700/1900) (1.0/1.4ma)
(!!!!) (2nd Best Amperex PQ Single) 6922 Amperex PQ USA NOS 1962 (14.5/16.2ma) (Audio Research, Nova)
(!!!!) (2ND BEST RCA PAIR) 6EU7 RCA NOS 1970-1972 (44-50/32 and 43-49/32)
(!!!!) (3rd Best Pair 1968) PCC88=7DJ8 Philips Holland "O" getter NOS 1968 (13.2/10.4ma and 10.4/11.2ma) (sweet sound)
(!!!!) (Best Amperex Pair) 6922 Amperex PQ and US Navy Amperex USA NOS 1962-1964 (19.0/18.2ma and 18.5/20.2ma) (close Gm matching) (Audio Research, Nova, CAT, CJ)
(!!!!) (Best Overall Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49/40 and 49/40 x 2 tubes) 1% matched
(!!!!) (Best Overall Pair) ECC83=12AX7 Tungsram Hungary branded IEC Mullard NOS 1982 (1.5/1.6ma and 1.4/1.7ma)
(!!!!) (Best Pair #1) 12AX7 GE branded 12AX7A International NOS 1977 (1.3/1.3mA and 1.4/1.4ma) (Same Gm) 1-2% matched
(!!!!) (BEST PAIR #1) 6DJ8 Philips by Matshushita JAPAN branded RCA NOS 1960's (data soon)
(!!!!) (BEST PAIR #1) 6DJ8 Philips by Matshushita JAPAN NOS 1960's (16.4/16.9ma and 17.0/16.2ma)
