(!!!!!) (Best Pair 1960's) 12AU7 Mullard UK NOS 1965-1966 same build (10.2/12.4ma and 10.6/12.0ma) (Rogue, Hovland, Audio Note)
(!!!!) (Best RCA Single 1964) 6201=12AT7WA RCA black plates NOS 1964 (9.8/7.4ma) (best tone)
(!!!!) (Recommended Pair) 311B Western Electric NOS 1973 and 1975 (35.2ma and 36.4ma)
(!!!!) (Recommended Pair) PCC88=7DJ8 Philips Holland NOS 1973 (12.4/10.5ma and 11.0/10.6ma) (Similar sound to 6DJ8 Holland) (sweet sound)
(!!!!) (Recommended XF2 Pair) EL34 Mullard XF2 NOS (1 tube) double halo "O-O" (1 tube) single halo "O" 1967-1968 (90.5ma and 92.8ma)
(!!!) (Best Pair) 6C4WA GE JAN NOS 1971-1973 (9.2/9.4ma) 1-3% matched (Conrad Johnson)
(!!!) (BEST PAIR) 6DJ8 Matshushita JAPAN branded RCA NOS 1975 (19/18ma and 17/20ma)
(!!!) (Best Single) 5751 Sylvania NOS 1970's (2.4/2.4ma) 1% section balance
(!!!) (Best Single) ECC82=12AU7 Philips Holland branded SONOTONE NOS 1960 (10.6/12ma)
(!!!) (Best Value Pair) 6C4WA GE JAN NOS 1966-1967 (7.8/7.8ma) 1-2% matched
(!!!) (Best Value Pair) 6DJ8 Matshushita JAPAN branded RCA NOS 1975 (15/17.8ma and 16.4/18.2ma)
(!!!) (Best Value Single) ECC82=12AU7 Philips Holland branded SONOTONE NOS 1960 (10.0/9.2ma)
(!!!) (Good Value Pair) JHS-5687WA Sylvania used/very good 1960's faded printing (35.4/34.2ma and 37.0/36.5ma)
(!!!) (Recommended Pair) 6C4WA GE JAN and JG NOS 1965-1967 (8.4/8.8ma) 1-3% matched
(!!!) (Recommended PAIR) 6C4WA GE JAN NOS 1971-1973 (8.4/8.4ma) 1% matched
(!!!) (Recommended Pair) 6C4WA GE JAN NOS 1971-1973 (8.8/9.0ma) 1-2% matched
(!!) (Single) PCC88=7DJ8 Philips Holland 1973 (9.5/10.6ma)
(!!) 403A=6AK5 Western Electric "D" getter like new 1966 (7.5ma)
(!!) 403A=6AK5 Western Electric NOS "D" getter 1971 (6.8ma)
(!) ECC82=12AU7 Valvo Holland used/good 75-90% 1968 (7.8/9.0ma)
