(!!!!!) (Best Pair) JAN-5687WA GE black plates like new 1968 (33.5/36.5ma and 35.0/34.2ma) (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 Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1% matched (1.1/1.1ma and 1.1/1.1ma) (best in phono stages and high end preamps)
(!!!!!) (Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1-2% matched (1.1/1.1ma and 1.1/1.2ma) (best in phono stages and high end preamps)
(!!!!!) (Best Siemens Pair 1968) CV492=ECC83=12AX7 Siemens Halske Germany NOS 1968 1-2% matched (1.2/1.3ma and 1.2/1.3ma) (best in phono stages and high end preamps)
(!!!!!) (Best Siemens Pair 1972) E83CC=12AX7 Siemens Halske Germany NOS triple mica 1972 printed in 1976 (1.0/1.3ma and 1.1/1.3ma) (best in phono stages and high end preamps)
(!!!!!) (Best Single 1961) EF86 Amperex Bugle Boy Holland made in France NOS 1961 (3.1ma)
(!!!!!) (Best Single) 5Y3GT Philips Holland NOS 1960's (66/40 and 68/40) (Fender, Supro, Victoria, Decware) (Best Sound for the money)
(!!!!!) (Best Single) CK-6072 Raytheon triple mica black plates "O" getter halo 1962 tests like new (2.7/2.7ma) (1-2% section balance)
(!!!!!) (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 XF1 NOS 1959 double "O-O" getter halos (83ma) (1st version after metal base) (very rare)
(!!!!!) (Best Sylvania Pair) 6DJ8 Sylvania NOS 1960's (15.2/21ma and 15/18.5ma) (good detail and smooth)
(!!!!!) (Best Tungsol Pair) 5881 Tungsol 1960-1967 like new and used - same build (66.2ma and 66.5ma)
(!!!!!) (Best Value Pair) 12AU7A RCA NOS 1964-1965 (8.2/11ma and 8.8/10.4ma)
(!!!!!) (Best Value Pair) 12AX7=ECC83 Philips Holland like new 1968 same date codes (1.5/1.7ma and 1.7/1.8ma) (Highest mA and Gm) 1-3% matched
(!!!!!) (Best Value Pair) 6SN7GTB GE NOS 1955-1964 same build (6.1/6.5ma and 6.0/6.3ma)
(!!!!!) (Best Value Pair) 6SN7GTB GE NOS 1964-1965 same build (6.4/7.0ma and 6.6/7.6ma)
(!!!!!) (Best Value Pair) 6SN7GTB RCA NOS and like new 1965 (8.2/10.2ma and 8.2/9.2ma) (same Gm) (warm and smooth)
(!!!!!) (Best Value Single) 5U4G RCA Emerson like new 1953 (57/40 and 56/40)
