(!!!!!) (Best Brimar Pair) 6057=12AX7 BRIMAR England branded "Standard" tall narrow ribbed plates NOS 1962 (1.0/1.1ma and 1.2/1.2ma) 1-3% matched (recommended for phono)
(!!!!!) (Best Holland Pair) 12AX7=ECC83 Philips Miniwatt Holland like new 1963 (1.0/1.0ma and 09./1.0ma) 1-3% matched
(!!!!!) (Best Mullard Single) 12AX7=ECC83 Mullard BVA UK NOS ribbed plates 1969 (1.1/1.1ma) 1% section balance
(!!!!!) (Best Mullard Single) 12AX7=ECC83 Mullard BVA UK NOS ribbed plates 1969 (1.2/1.4ma)
(!!!!!) (BEST MULLARD SINGLE) 12AX7=ECC83 Mullard England branded Philips ribbed plates NOS 1974 (163 Series) (1.25/1.7ma and Gm=1800/2000)
(!!!!!) (Best Overall Brimar Single) 6057=12AX7 Brimar England NOS 1962s (Gm=1600/1700) (1.5/1.5ma)
(!!!!!) (Best Overall Brimar Single) 6057=12AX7 Brimar Thorn "T" England NOS 1960's (Gm=1700/1700) (1.4/1.5ma)
(!!!!!) (Best Overall Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom NOS 1961-1962 perfect condition (1.1/1.3ma and 1.2/1.5ma) (Nagra, Lamm, VTL, Aesthetix, Diva)
(!!!!!) (Best Overall Single) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates 1960 (1.0/1.0ma and Gm=1600/1600) 1% section balance
(!!!!!) (Best Pair 1963) 12AX7=ECC83 Philips Miniwatt Holland like new 1963 (1.1/1.2ma and 1.2/1.3ma)
(!!!!!) (Best Single) ECC83=12AX7 Miniwatt Holland NOS "D" getter with cross-bar 1958 (1.5/1.7mA and Gm=1800/1800) (High mA and Gm)
(!!!!!) (Best Tungsram Pair) ECC83=12AX7 Tungsram Hungary NOS 1969 (1.1/1.2ma and 1.0/1.3ma) 1-3% matched
(!!!!!) (Best Tungsram Pair) ECC83=12AX7 Tungsram Hungary NOS 1980 (1.4/1.6ma and 1.4/1.6ma) 1% matched (same mA and Gm) (Audio Hungary A50i)
(!!!!!) (Best Tungsram Pair) ECC83=12AX7 Tungsram Hungary NOS 1980 (1.4/1.6ma and 1.4/1.6ma) 1-2% matched
(!!!!!) (Best Tungsram Quad) ECC83=12AX7 Tungsram Hungary NOS 1980 (1.5/1.7ma x 4 tubes) 1-3% matched quad
(!!!!!) (Best Value Single) 12AX7 IEC Mullard UK NOS 1965 copper grid posts (0.7/1.2ma and Gm=1400/1700)
(!!!!!) (Best Value Single) 12AX7 Mullard branded "M" UK used/good 1961 copper grid posts (0.7/.8ma and Gm=1400/1500) (161 series)
(!!!!!) (Recommended Brimar Single) 6057=12AX7 Brimar Thorn "T" England NOS 1960's (Gm=1550/1650) (1.0/1.2ma)
(!!!!!) (Recommended Mullard Pair) 12AX7=ECC83 Mullard BVA UK ribbed plates NOS 1969 in white boxes (1.1/1.4ma and 1.1/1.3ma) 1-2% matched
(!!!!!) (Recommended Mullard Pair) 12AX7=ECC83 Mullard BVA UK ribbed plates NOS 1969 in white boxes (1.2/1.7ma and 1.2/1.8ma) 1-5% matched (Highest mA and Gm)
