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(!) (Best Single) 12DQ6B RCA NOS 1970's (82ma)
(!) (Best Single) 12SF5GT National Union NOS 1950 (2.1ma Gm=1600)
(!) (Best Single) 2A5 RCA by Sylvania NOS 1947 (89/50)
(!) (Best Single) 2A5 RCA NOS 1940's (93/50)
(!) (Best Single) 2X2 National Union NOS 1950 era (59/40)
(!) (Best Single) 37 GE ribbed plate NOS 1943 (8.0ma)
(!) (Best Single) 393A GE made for WE NOS 1940's original box, strong output (64/40)
(!) (Best Single) 407A Western Electric NOS 1962 (44/26 and 49/26)
(!) (Best Single) 50C5 GE black plate NOS 1963 (86/60)
(!) (Best Single) 57 Hytron NOS 1940's (50/31)
(!) (Best Single) 5726=6AL5W Raytheon NOS 1960's (50/40 and 50/40)
(!) (Best Single) 5Z3G Hytron NOS 1947 (51/40 and 51/40)
(!) (Best Single) 5Z3G RCA FAA NOS 1962 (56/40 and 55/40)
(!) (Best Single) 6111 France NOS 1962 (7.0/7.4ma) (close triode balance)
(!) (Best Single) 6AH4GT Tungsol ITT NOS 1960's (34ma)
(!) (Best Single) 6AQ5A Sylvania black plate NOS 1970 era (57ma)
(!) (Best Single) 6AQ5A Sylvania black plate NOS 1970's (42.5ma)
(!) (Best Single) 6AS7GA GE NOS 1962 (138ma and 144ma)
(!) (BEST SINGLE) 6BA6 Brimar England NOS 1960's (10.8ma)
(!) (Best Single) 6BE6 GE NOS 1960 (1.5ma)
