(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (4.9/4.6ma and 42/43ma)
(!!!!) (Recommended Pair) 6SN7GTB RCA branded GE NOS 1966-1967 (10.4/10.6ma and 10.2/11.6ma) (smooth presentation)
(!!!!) (Recommended Single) 6DJ8 Philips Miniwatt Holland NOS 1960 era large "O" getter halo (18.0/19.4ma)
(!!!!) (Recommended Single) PCC88=7DJ8 Philips by Mullard UK NOS 1975 (12.2/12.6ma)
(!!!!) (Single 1959) ECC82=12AU7 Philips Miniwatt Holland like new low hours/tests like new 1959 (10.6/9.8ma)
(!!!!) (Single 1964) ECC82=12AU7 Miniwatt Philips Canada NOS 1964 (9.2/9.8ma) (same build as Holland)
(!!!!) 5U4G GE NOS 1952 (55/40 and 51/40)
(!!!!) 6AK5 GE NOS 1973 (10.2ma)
(!!!) (2nd Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1971 (4.9/5.2ma and 59/56ma)
(!!!) (Best Matched Quad #1) 5Y3GT Philips Holland NOS 1960's (1 set of 4)
(!!!) (Best Mullard Pair) EZ80=6V4 Mullard La Radiotechnique Chartres plant France NOS "O" getter halo 1970 (64-64/40 x 2 tubes) 1% matched
(!!!) (Best Pair for the money) 5Y3GT Philips Holland NOS 1960's (58-64/40 and 59-65/40)
(!!!) (BEST RCA SINGLE) 6CA4 RCA NOS 1963 (53/40 and 54/40)
(!!!) (Best Single 1966) 12AX7A RCA ribbed plates NOS 1966 (Gm=1800/1600, 1.3/1.0ma) (best tone, 2nd best to Mullard)
(!!!) (Best Single) 6350 RCA black plates NOS "O" getter NOS 1960's (16.0/16.2ma) (Highest Ma and Gm)
(!!!) (Best Single) 6L6GC RCA Black Plate used/tests like new 1964 (88ma)
(!!!) (Best Single) EZ80 Mullard France NOS "O" getter halo 1970 (64/40 and 64/40)
(!!!) (Best Sylvania Single) 8417 Sylvania NOS branded Westinghouse NOS 1973 (113mA)
(!!!) (Best Value Pair) 12AU7A RCA NOS 1960's faded printing (9.3/11.8ma and 10.6/9.0ma)
(!!!) (Best Value Pair) JAN-12AT7WC GE gray plates NOS 1970 (7.0/7.6ma and 7.0/8.2ma)
