(!!!!!) (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 Single) EL34 Mullard UK branded CMI XF2 single halo "O" NOS 1969 (96.7ma)
(!!!!!) (Best Single) EL34 Mullard UK branded Siemens XF2 double halo "O-O" NOS 1963 (108ma)
(!!!!!) (Best Single) EL34 Mullard UK XF2 single halo "O" NOS 1973 (85ma)
(!!!!!) (Best Value Single) EL34 Mullard UK branded Pinnacle XF2 double halo "O-O" NOS 1965 (67ma)
(!!!!!) (Good Value Pair - for Audio Aero) 6021=CV3986 Mullard UK Mitcham NOS 1969 (4.4/4.6ma and 4.5/4.8ma) (1-3% matched)
(!!!!!) (Recommended Pair - for Audio Aero) 6021=CV3986 Mullard UK Mitcham NOS 1969 (4.8/5.3ma and 4.8/5.0ma) (1-3% matched)
(!!!!!) (Recommended Pair) E188CC=7308 Siemens Halske Germany NOS 1968-1969 (13.8/12.8ma and 13.5/14.2ma) (very low noise) (phono grade) (rare)
(!!!!) (2nd Best Single) 5842=417A Amperex "PQ" Holland "D" getter Gold Pins NOS 1956-1959 (23ma)
(!!!!) (Best Holland Pair) ECC82=12AU7 Philips Holland NOS 1971 (10.8/11ma and 10.0/10.4ma)
(!!!!) (BEST Holland Pair) ECC88=6DJ8 Philips Holland NOS 1972-1974 (13.4/12.4ma and 13.8/12.4ma)
(!!!!) (Best Overall Single) EF86 Telefunken Germany <> bottom NOS gray shield 1972 (3.4ma) (Neumann, Lawson, Soundelux, Manley)
(!!!!) (Best Pair) ECC82=12AU7 Philips Holland NOS 1972 (12/12ma and 11.2/11.8ma) (Highest mA and Gm)
(!!!!) (Best Pair) ECC83=12AX7 Tungsram Hungary branded IEC Mullard NOS 1982 (1.3/1.6ma and 1.4/1.6ma) 1-3% matched (high Gm)
(!!!!) (Best Pair) ECC83=12AX7 Tungsram Hungary branded IEC Mullard NOS 1982 (1.4/1.4ma and 1.4/1.4ma) 1-2% matched
(!!!!) (Best Pair) ECC83=12AX7 Tungsram Hungary branded IEC Mullard NOS 1982 (1.5/1.4ma and 1.5/1.4ma) 1% matched
(!!!!) (Best Single 1975) 12AX7=ECC83 Mullard England ribbed plates NOS 1975 (163 Series) (1.3/1.4ma and Gm=1800/1800)
(!!!!) (Best Single) 5842=417A Amperex "PQ" Holland "D" getter Gold Pins NOS 1956-1959 (35ma)
(!!!!) (Best Value Pair) 6021=CV3986 Mullard UK Whyteleafe plant NOS 1972 original boxes (4.4/7.0ma and 4.8/6.0ma)
(!!!!) (Good Value Single) 396A Western Electric NOS 1974 (5.8/4.8ma)