(!!) (#1 5687 Tungsol used 1961) 5687WA Tungsol bronze plates "O" getter halo used/very good 1961 (33.4/34.8ma)
(!!) (1 Pair) 31 Cunningham NOS 1940's (11ma and 11.6ma)
(!!) (Best Pair #2) 6AW8A GE NOS 1976 (3.3/3.6ma and 25.8/27.2ma) 1-3% matched (Shindo)
(!!) (Best Pair #3) 6AW8A GE NOS 1976 (3.1/3.3ma and 22/23ma) (Shindo)
(!!) (Best Pair) 6AW8A GE NOS 1964 (4.5/4.3ma and 20/19ma) 1-3% matched (Shindo)
(!!) (Best Pair) 6J6A Tungsol NOS "D" getter 1961 (9.4/10.5ma and 9.0/11.4ma)
(!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (9.8/9.6ma)
(!!) (Best Single) 5687 Tungsol rebranded CBS black plates "U" getter NOS 1950's (38/48ma)
(!!) (Best Single) 6AH4GT Sylvania branded Hytron "D" getter NOS 1954 (48ma) (Highest mA and Gm)
(!!) (Best Single) UY-227 RCA Radiotron Balloon tests like new 1930 era (10.2ma)
(!!) (Best Value) 12BH7A Tungsol black plates "O" getter halo NOS 1960 era (9.5ma/13ma)
(!!) (BEST VALUE) JAN-CHS-1629 Sylvania NOS 1943 bright eye (6 in stock)
(!!) (Good Value Pair) 6384 Tungsol used/good 1967-1969 same build, 1 tube has slightly tilted glass (59.5ma and 60ma)
(!!) (Good Value Single) 12AZ7 Tungsol black plates "U" getter halo NOS 1950's (7.5ma/7.5ma)
(!!) (GOOD VALUE SINGLE) 5687 Tungsol rebranded IBM bronze plates "U" getter used/good 1959 (29/36ma)
(!!) (Recommended Pair) 6J6A Tungsol NOS "D" getter 1961 (7.5/8.8ma and 7.8/9.2ma)
(!!) (Recommended Pair) 6S4A Westinghouse black plate NOS -1963 era (20ma and 21.2ma)
(!!) (Recommended Single) 5881 GE Canada NOS 1970 (73ma) (same build as Tungsol)
(!!) (Recommended Single) 5881 GE Canada NOS 1970 (81ma) (same build as Tungsol)
(!!) (Recommended Single) 6080WC GE NOS 1988 tilted glass (76/92ma) close Gm
