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(!!!!!) (Best Pair #1) 12AU7=ECC82 Mullard UK ribbed plates NOS 1974 same date codes (9.2/9.1ma and 9.2/10.2ma) (Rogue, Hovland, Audio Note, Prima Luna) (Same Gm)
(!!!!!) (Best Pair #3) 12AU7=ECC82 Mullard UK ribbed plates NOS 1961-1964 (10/9.6ma and 10.8/10ma) (Rogue, Hovland, Audio Note, Prima Luna) (Close Gm)
(!!!!!) (Best Pair #3) 12AU7=ECC82 Mullard UK ribbed plates NOS 1970-1972 (11/10ma and 9.6/10.2ma) (Rogue, Hovland, Audio Note, Prima Luna) (Same Gm)
(!!!!!) (Best Pair #3) 12AU7=ECC82 Mullard UK ribbed plates NOS 1972-1976 (10.2/12.8ma and 11.2/12ma) (Rogue, Hovland, Audio Note, Prima Luna) (Close Gm)
(!!!!) (Best Pair) D3a=7721 Siemens Germany NOS 1978 (32.5/33ma) 1% matched
(!!!!) (Best Single #1) 12AX7=ECC83 Philips Miniwatt Holland ribbed plates NOS 1965 (1.4/1.3ma and Gm=1900/1900) 1-2% section balance
(!!!!) (Best Single) 12AT7 RCA black plates "D" getter NOS 1959 (9.2/9.0ma)
(!!!!) (Best Single) EZ81=6CA4 Philips Australia NOS 1974 (58/40 and 58/40) (similar sound to EZ81 Holland) 1% section balance
(!!!!) (Single) 12AT7 RCA NOS 1965 (7.2/12.8ma) (good tone)
(!!!) (Best Single #2) E88CC=6922 Siemens Halske Germany NOS 1962 (13.6/14.6ma) 1-5% section balance
(!!!) (BEST VALUE PAIR) 6SN7GTB RCA coin-base 1970-1975 (10.4/9.6ma and 9.4/10.6ma)
(!!!) (Best Value Single) CV4003=12AU7 RFT East Germany NOS 1974 (12.2/12.8ma)
(!!!) (Good Value Pair) JAN-6384 Cetron by Tungsol used/very good 1979 (66ma and 63ma)
(!!!) (Mullard Pair) 6BM8=ECL82 RTC by Mullard UK NOS 1975 (2.2/34ma and 2.0/38ma)
(!!) (Recommended Single) JAN-12AX7WA Sylvania NOS 1974 (Gm=2100/2300 and 1.7/1.9ma)
(!!) (Single) E88CC=6922 Philips SQ Holland gold pins used/good 1973 (10/9ma) (Good Gm)
(!!) 6BM8=ECL82 Philips Miniwatt Holland used/good 1966 (2.4ma/25ma)
(!!) 6BM8=ECL82 Philiups Miniwatt by Mullard used/good 1959 (1.8ma/23ma)
(!!) 6BM8=ECL82 Pope Holland used/good 1965 (2.4ma/24ma)
(1 PAIR) NE-408A Northern Electric Canada NOS 1972-1974 (83/60 and 85/60)
