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(!!!!) (Best Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (5.5/5.2ma and 52/56ma)
(!!!!) (BEST SINGLE) JAN-CHY-5U4G CBS NOS 1957 (58/40 and 60/40)
(!!!!) (Best Value Pair #1) 12AX7A RCA gray ribbed plates NOS 1967-1973 (best tone) (0.9/0.9ma and 0.9/1.1ma) (Fender)
(!!!!) (Best Value Pair) 5881 GE Canada NOS 1965-1970 (73ma) (same internal build and sonics as 5881 Tungsol)
(!!!!) (BEST VALUE SINGLE) 5U4G TUNGSOL NOS 1952 slightly tilted glass (52/40 and 52/40)
(!!!!) (Best Value Single) JAN-CHY-5U4G CBS used/very good "D" getter 1946 (53/40 and 53/40) 1% section balance
(!!!!) (Best Value) 5U4G GE NOS 1952 in white box glass slightly tilted (48/40 and 49/40)
(!!!!) (Good Value Single) 6L6GC Seeburg by RCA black plate used/good 1961 (66ma)
(!!!!) (Pair) 5Y3GT Philips Holland NOS 1960's (60-65/40 and 60-66/40)
(!!!!) (Recommended GE Pair) 6FQ7 Zenith by GE NOS 1977 1-3% matched (7.0/7.6m and 6.8/7.5ma)
(!!!!) (Recommended Pair) 5U4GB RCA NOS and like new 1962 (56-58/40 and 56-58/40)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (4.9/4.6ma and 42/43ma)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1971 (5.3/5.4ma and 58/55ma)
(!!!!) (Recommended Single) 6DJ8 Philips Miniwatt Holland NOS 1960 era large "O" getter halo (18.0/19.4ma)
(!!!!) (Recommended Single) PCC88=7DJ8 Mullard Holland NOS 1973 (11.5/13.8ma)
(!!!!) (Recommended Single) PCC88=7DJ8 Philips by Mullard UK NOS 1975 (12.2/12.6ma)
(!!!!) (Single) 12BH7A GE gray oval plates NOS mid-1960's (11.5/16ma)
(!!!!) (Single) ECC82=12AU7 Philips Holland NOS 1969 (11.8/11.4ma) (Same Gm) 1-3% section balance
(!!!!) 5U4G GE NOS 1952 (55/40 and 51/40)
(!!!!) 6AK5 GE NOS 1973 (10.2ma)