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(!!!!) (Best Single) ECC83=12AX7 Telefunken Germany <> bottom smooth plates 1967 (1.6/1.6ma and Gm=1900/1800) (Highest mA and Gm)
(!!!!) (Best Single) EF86 Mullard UK branded Philips Miniwatt "D" getter NOS 1954-1955 (3.3ma, Gm=2100) (oldest single)
(!!!!) (Best Single) EF86 Telefunken Germany <> bottom NOS gray shield 1972 (2.7ma) (Neumann, Lawson, Soundelux, Manley)
(!!!!) (Best Single) JAN-5687WA Sylvania NOS 1967 (38/39ma) (Highest Ma and Gm)
(!!!!) (Best Single) JAN-5998 Tungsol NOS black plates NOS 1966 same build as 421A Western Electric (87ma/73ma)
(!!!!) (BEST SINGLE) JAN-CHY-5U4G CBS NOS 1957 (58/40 and 60/40)
(!!!!) (Best Single) JHS-5687WA Sylvania NOS 1966 (46/48ma) (Highest Ma and Gm)
(!!!!) (Best Sylvania Pair) 6BQ5 Sylvania black plate NOS 1970's (56.0ma and 58.0ma)
(!!!!) (Best Tungsol Pair 1959) 12AU7A Tungsol ribbed plates NOS "U" getter halo 1959 (8.5/8.8ma and 8.8/7.8ma)
(!!!!) (Best Value 1960) 12AX7 Philips Miniwatt Holland low hours/tests like new 1960 (Gm=1600/1600 and 1.0/1.3ma)
(!!!!) (Best Value Pair #1) 6B4G Raytheon NOS 1940's separate plates in white boxes (89ma and 92ma)
(!!!!) (Best Value Pair #2) 6SN7GTB RCA coin-base NOS 1970-1975 (8.8/9ma and 9.3/8.3ma)
(!!!!) (Best Value Pair) 12AX7A RCA gray ribbed plates NOS 1968-1974 (best tone) (0.8/0.9ma and 0.8/1.0ma) (Fender, Rogue, McIntosh, CJ)
(!!!!) (Best Value Pair) 5U4GB RCA NOS and like new 1974-1975 (59-60/40 and 60-60/40) slightly tilted glass
(!!!!) (Best Value Pair) 6B4G Raytheon NOS 1940's separate plates, 1 branded Philco (90ma and 91.5ma)
(!!!!) (Best Value Pair) 6BQ5 GE NOS 1959-1960's (43ma and 46ma)
(!!!!) (Best Value Pair) 6SN7GTB GE NOS 1960-1962 (7.0/6.8ma and 7.2/6.8ma) (smooth) (Schiit Freya, Rogue)
(!!!!) (Best Value Pair) 6SN7GTB RCA coin-base NOS and like new 1970-1975 (9.8/7.0ma and 8.8/7.0ma)
(!!!!) (Best Value Single 1960) 12AX7 GE tall gray ribbed plates "U" getter tests like new 1960 faded printing (Gm=1600/1600 and 1.1/1.3ma)
(!!!!) (Best Value Single) 12AU7=ECC82 Philips by Mullard UK ribbed plates used/good 1969 (8.2/8.2ma) 1% section balance
