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(!!!!) (Best Value Pair #1) 12AX7=ECC83 Telefunken Germany <> bottom branded GAP/R Computor tube <> bottom smooth plates used/good 1964 era (0.9/0.8ma and 1.0/0.8ma)
(!!!!) (Best Value Single) 12AU7=ECC82 Mullard UK ribbed plates like new 1965 (10/12.8ma) (smooth rich sound)
(!!!!) (Best Value Single) GZ37 Mullard UK NOS 1966-1967 slightly tilted glass (51/40 and 52/40)
(!!!!) (Best Value Single) JAN-6922 Amperex USA like new 1971 (13.4/12.6ma)
(!!!!) (Good Value Single) E80CC=6085 Siemens Holland gold pins NOS 1963 (5.0/5.5ma)
(!!!!) (Holland Single) 12AU7 Philips Miniwatt Holland like new 1961 large "O" getter halo (9.6/11ma)
(!!!!) (Recommended Pair) 12AU7A Amperex and Philips by Mullard UK NOS ribbed plates 1974 (10.6/11.6ma and 10.4/11.2ma) (DAC, linestage)
(!!!!) (Recommended Pair) 12AU7A=ECC82 Mullard rebranded "GE" and "Zenith" ribbed plates NOS 1966 (9.8/11ma and 10.4/10.5ma) (smooth rich sound)
(!!!!) (Recommended Single) CV378=GZ37 Mullard UK NOS 1967 (52/40 and 54/40) 1-3% section balance
(!!!!) (Single 1953) 12AU7 GE gray ribbed plates "U" getter NOS/80% 1953 (7.6/8.0ma) (smooth sound)
(!!!!) (Single 1961) 12AU7=ECC82 Mullard BVA UK shield logo NOS 1961 (7.5/9ma) (Gf1 series) (smooth rich sound)
(!!!!) (Single 1965) EL34 Philips Miniwatt by Mullard XF2 double round getter halo "O-O" NOS 1965 (76ma)
(!!!!) (Single) 5751 Siemens Halske Germany triple mica NOS 1966-1967 (1.8/2.4ma)
(!!!!) 6336A Tungsol branded Heintz and Kaufman 1960's (62/76ma) ***
(!!!) (3rd Best Pair) CK-5755=420A Raytheon clear top NOS 1965 (1.6/2.0ma and 1.6/2.0ma) 1% matched
(!!!) (4th Best Pair) CK-5755=420A Raytheon clear top NOS 1965 (1.7/1.8ma and 1.8/1.9ma)
(!!!) (Best Holland Single) ECF80=6BL8 Amperex Bugle Boy Holland NOS 1957 (14ma/11ma)
(!!!) (Best Mullard Single) ECF80=6BL8 IEC Mullard UK NOS 1966 (16ma/12ma) (Highest mA and Gm)
(!!!) (Best Overall Pair #2) 5687WB GE branded CK5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (39/38.6ma and 38/37ma)
(!!!) (Best Overall Pair) 5687WB GE branded CK5687WB Raytheon black plates NOS 1970's (Audio Note, Manley, Modwright) (40/41.5ma and 40/40.5ma)
