(!!!!!) (Best Pair) 6DJ8=ECC88 Philips Miniwatt Holland NOS 1960-1963 (16.6/17.0ma and 15.8/16.6ma) 1-5% matched
(!!!!!) (Best Pair) 6V6GT Mullard UK NOS 1960 era (40.0ma and 40.6ma) (same Gm)
(!!!!!) (Best Pair) 6V6GT Sylvania green leaf coated glass NOS 1940's in white boxes 1-2% matched (38.8ma and 39.6ma) (Same Gm)
(!!!!!) (Best Pair) 8417 Sylvania NOS 1970's same date codes (117.4ma and 118ma)
(!!!!!) (Best Pair) 8417 Sylvania NOS 1970's same date codes (119.5ma and 120ma)
(!!!!!) (Best Pair) 8417 Sylvania NOS 1970's same date codes (127.4ma and 128ma)
(!!!!!) (Best Pair) E188CC=7308 Siemens Halske Germany NOS 1968-1969 (15.5/16.2ma and 15.2/16.8) (very low noise) (phono grade) (rare)
(!!!!!) (Best Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961 (1.4/1.45ma and 1.5/1.6ma) 1-2% matched (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!!) (Best Pair) JAN-12AT7WC Sylvania black plates NOS 1976 (11.2/12.2ma and 11.2/11.0ma)
(!!!!!) (Best Pair) JAN-211 GE NOS 1942 original boxes (108.6ma and 109.4ma)
(!!!!!) (Best Pair) JAN-211 GE NOS 1942-1943 original boxes - same date codes (108.2ma and 109.2ma) (Ongaku, Air Tight, Cary)
(!!!!!) (Best Pair) JAN-5691 Sylvania black plates NOS 1977 (2.1/2.2mA and 2.1/2.3mA) (Best 6SL7GT sub) (same internals as 5691 red base)
(!!!!!) (Best Pair) JAN-5691 Sylvania black plates NOS 1979 (2.0/2.1mA and 2.1/2.1mA) (Best 6SL7GT sub) (same internals as 5691 red base)
(!!!!!) (BEST PAIR) JAN-6005W GE NOS 1980-1982 (56.5ma and 56.6ma)
(!!!!!) (BEST PAIR) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (16.2/16.0ma and 15.2/15.4ma)
(!!!!!) (BEST PAIR) PCC88=7DJ8 RFT East Germany branded Tesla NOS 1980 era (17.8/17.6ma and 18.0/18.8ma) (highest mA and Gm)
(!!!!!) (BEST PHONO PAIR) ECC83=12AX7 Siemens Halske Germany branded SONOTONE NOS 1962 (1.6/2.0ma and 1.6/1.7ma) 1-3% matched (Aesthetix, EAR, Lamm, VTL, Jadis, Nagra)
(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (129ma, 129ma, 129.5ma, 130ma) 1-3% matched
(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (130.2ma, 131ma, 131.2ma, 132.6ma) 1-3% matched
(!!!!!) (BEST QUAD) JAN-6550A GE NOS 1985-1986 (132.5ma, 132.2ma, 133.2ma, 134.4ma) 1-2% matched