(!!!!!) (Best Overall Single) 6SC7GTY Tungsol NOS black round plates NOS 1950 era - small chip out of base (2.1ma and 2.2ma)
(!!!!!) (Best Pair) 6V6GT Mullard UK NOS 1960 era (40.0ma and 40.6ma) (same Gm)
(!!!!!) (Best Pair) 6V6GT Sylvania green leaf coated glass NOS 1940's in white boxes 1-2% matched (38.8ma and 39.6ma) (Same Gm)
(!!!!!) (Best Single 1963) CV492=12AX7 Mullard UK NOS 1963 (161 series) (1.3/1.3ma) 1% section balance
(!!!!!) (Best Sylvania Pair) 6V6GT Sylvania green leaf coated glass NOS 1940's in white boxes (41ma and 44ma) (Same Gm)
(!!!!!) (Recommended Pair) 6V6GT Mullard UK gray plate NOS 1960 era (41.5ma and 41.8ma)
(!!!!!) (Recommended Pair) 6V6GT Mullard UK gray plate NOS 1960 era (41.5ma and 42.8ma)
(!!!!!) (Recommended Pair) 6V6GT Mullard UK gray plate NOS 1960 era (44ma and 45ma)
(!!!!) (Best Overall Single) 6V6GT Sylvania NOS 1940's (46.5ma)
(!!!!) (Best Pair) 5Y3GT Philips Holland NOS 1960's (59-63/40 and 60-64/40)
(!!!!) (Best Single 1953) 12AY7 GE rebranded Raytheon "GRAY BOX PLATES" NOS "D" getter 1953 (3.2/3.5ma)
(!!!!) (Best Single 1961) 12AX7=ECC83 Mullard UK ribbed plates NOS 1961 (161 Series) (1.1/1.1ma and Gm=1600/1700)
(!!!!) (Best Single 1975) 12AX7=ECC83 Mullard England ribbed plates NOS 1975 (163 Series) (1.3/1.4ma and Gm=1800/1800)
(!!!!) (Best Tungsol Single) 6V6GTA Tungsol black plate NOS 1960 era (49.5ma)
(!!!!) (BEST VALUE PAIR) 6V6G Mullard branded Haltron England NOS gray coated glass 1940's (43ma and 47.5ma)
(!!!!) (Best Value Pair) 6V6GT Sylvania green leaf coated glass NOS/80% 1940's in white boxes (32.5ma and 33ma)
(!!!!) (Best Value Single) 6V6G Haltron UK coated glass NOS 1940's (48.5ma)
(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 (.8/1.2mA Gm=1400/1600)
(!!!!) (Best Value used) ECC83=12AX7 Fisher Mullard ribbed plates used/good 1964 copper grid posts (.7/.8mA Gm=1400/1500)
(!!!!) (Good Value Pair) 6V6GTA RCA used/good 1962 and 1970's (30ma and 31.5ma)