(!!!!!) (Best Mullard Single) GZ32 Mullard England branded ADZAM NOS "D" getter halo 1960 faded printing (60/40 and 60/40)
(!!!!!) (Best 12AX7 Single) 12AX7 Telefunken Germany <> bottom smooth plates 1960's (1.2/1.3ma and Gm=1600/1700)
(!!!!!) (Best GE Quad) 6FQ7 GE NOS 1970's same date codes (1 Quad) (CJ, Marantz, Stax)
(!!!!!) (Best Gray Plate Pair) 6AS7G RCA NOS Gray Plates 1970's (95/100ma and 97.5/101ma) 1-2% matched (Bottlehead / Woo Audio / Le Figaro)
(!!!!!) (Best Holland Pair) 12AX7=ECC83 Philips Holland NOS 1970-1971 (1.3/1.4ma x 2 tubes) (1-2% matched) (High Ma and Gm)
(!!!!!) (Best Holland Pair) 12AX7=ECC83 Philips Holland NOS 1971 (1.3/1.4ma x 2 tubes) (1-2% matched) (High Ma and Gm)
(!!!!!) (Best Holland Pair) 12AX7A Amperex Globe Logo Holland NOS 1968-1969 (Gm=1800/2000 and (Gm=1900/2000) (Highest Ma and Gm)
(!!!!!) (Best Holland Single - Best Value) 12AX7=ECC83 Miniwatt Dario Holland NOS 1970 (Gm=1700/1800)
(!!!!!) (Best Matched Quad) 6L6GC RCA black plates NOS 1960's (78.0/78/78.5/80.4ma) (Excellent Quad) (Best in Leben and Fender amps)
(!!!!!) (Best Matched Quad) 6L6GC RCA black plates NOS 1960's (83.5/84.8/85/86ma) (Highest Testing Quad) (Recommended for Leben and Fender amps)
(!!!!!) (BEST OVERALL GE Pair) 6L6GC GE NOS 1960's - 1970 same internal build (79ma and 80ma)
(!!!!!) (Best Overall Pair) 5687 GE "5-Star" NOS 1969 (35/35ma and 34.5/36ma) 1-2% matched (Highest Ma and Gm)
(!!!!!) (BEST OVERALL PAIR) 6072A GE rebranded National NOS 1960's - 1970 era in Aero Electronics boxes (2.9/3.0ma and 2.9/3.2ma) 1-3% matched
(!!!!!) (Best Overall Siemens Pair) E88CC=6922 Siemens Halske Germany NOS "O" getter halo 1969-1970 faded printing (A4 Series) (16.6/17.2ma and 16.8/18.4ma) (closely matched) (Best Value)
(!!!!!) (Best Overall Single) 12AX7 Telefunken Germany <> bottom smooth plates red-tip mil-grade 1967 (1.1/1.2ma and Gm=1600/1600) 1-2% section balance
(!!!!!) (Best Overall Single) E88CC=6922 Telefunken Germany <> bottom NOS 1968 (15.5ma/17.5ma)
(!!!!!) (Best Pair - Best Price) GZ34 Mullard Blackburn UK branded Philips NOS NOS 1969-1970 (59-60/40 and 60-60/40 x 2 tubes)
(!!!!!) (Best Pair) ECC803S=12AX7 Telefunken Ulm Germany <> bottom gold pins NOS 1967 and 1969 (1.2/1.4ma and 1.2/1.5ma)
(!!!!!) (BEST Pair) GZ32 Miniwatt Dario France NOS 1956 (63-64/40 and 64-64/40 x 2 tubes)
(!!!!!) (Best RCA Pair) 6SN7GTB RCA NOS 1960's (10.5/10.5ma and 10.0/11.4ma)
