(!!!!) (Recommended Pair) 12AX7 Philips and Valvo Holland NOS 1965-1966 era (1.2/1.1ma and 1.3/1.2ma)
(!!!!) (Best Single 1961) 12AX7=ECC83 Philips Miniwatt Holland 1961 large "O" getter halo NOS (1.8/1.3ma and Gm=2100/1700)
(!!!) (BEST SINGLE 1964) AFLC-12AX7WA Sylvania NOS 1964 (Gm=1900/1900)
(!) (Recommended Pair) 12B4A RCA NOS 1963 (40ma and 41ma)
(!) (#1 231D Best Value Pair) 231D Western Electric NOS 1953 (1.8/1.8ma)
(!) (#1 231D Best Value Pair) 231D Western Electric NOS 1954 (1.6/1.6ma)
(!) (#1 24A Balloon) 24A BRUNSWICK Balloon used/tests like new, small crack in base (48/25) (3.8ma)
(!!!) (Best Overall Pair) 286A Western Electric "top printing" mesh-plate NOS 1942-1945 (6.4ma and 6.6ma)
(!) (Pair) 404A Western Electric used/good 1963-1966 (17.0ma and 17.2ma)
(!!!!) (Best Overall Single) 5670W GE JAN NOS 1986 (9.8/10ma)
(!!!!) (Best Pair for the money) 5687 and 5687WA Tungsol black plates large "U" getter test like new 1950's (36.8/38ma and 36.5/35ma) (highest Ma and Gm)
(!!!) (Recommended Pair) 5691 RCA red base gray plates 1968-1974 (2.2/2.4ma and 2.1/2.3ma)
(!!) (Best Pair) 6A7G Marconi Radiotron Canada NOS 1950 era
(!) (#1 6CW7 Best Single) ECC84=6CW7 Mullard branded Philips Miniwatt Holland 1962 (10.6/11.0ma)
(!!!) (BEST SINGLE) 6DJ8 Amperex Holland NOS 1965 (14.6/18.6ma) (sweet and musical)
(!) (#1 6DJ8 Best Value Japan) 6DJ8=M3624 Toshiba Japan Tektronix Checked NOS 1960's (11.6/13.6ma)
(!!) (SINGLE) 7025 RCA gray NOS 1970 era (Gm=1450/1600 and 1.0/1.2mA)
(!!!) (Best Pair) 7199 RCA Black Plates NOS 1960's (14/7.2ma and 14/8.2ma)
(!!!) (Recommended Pair) 12AZ7A GE gray plates NOS 1969-1970 (8.2/8.0ma and 8.7/8.8ma) (McIntosh MC275)
(!!!) (Recommended Pair) 12AZ7A Sylvania black plates NOS 1960's same build (8.2/9.8ma and 8.4/9.8ma))