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(!!!!) (Best Single #1) 12AX7 RCA Motorola black plates "D" getter like new 1956 (1.5/1.7ma and Gm=1700/1800)
(!!!!) (Best Single 1956) 12AX7 GE Motorola tall gray ribbed plates "U" getter 1956 like new (Gm=1700/2000 and 1.6/2.1ma)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1971 (5.3/5.4ma and 58/55ma)
(!!!!) (Pair) 6J5GT Sylvania lightning logo NOS 1945-1946 (7.6ma and 7.4ma)
(!!!) (Single) JAN-6189=12AU7WA Sylvania NOS 1978 (9.2/8.8ma) (same Gm)
(!!!) (Single) JAN-6189=12AU7WA Sylvania NOS 1968 (8.2/9.4ma)
(!!!) JHS-6189=12AU7WA Sylvania NOS 1965 in white box (10/9ma)
(!!!) JHS-6189=12AU7WA Sylvania NOS 1966 in white box (9.5/9.6ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (8.8/8.4ma)
(!!!) (Single) 5814A=12AU7 GE NOS 1960's rebranded 5814WA Penta Labs 1993 (9.6/8.8ma)
(!!!!) (Best Single 1941-1945) VT-231=6SN7GT RCA gray coated glass copper grid posts 1941-1945 (9.6/9.8ma)
(!!!!) (Single) JAN-6189 Sylvania NOS 1968 (9.0/8.2ma)
(!!!!) (Single) JAN-6189W=12AU7 Philips by Sylvania NOS 1987 (8.2/8.8ma)
(!!!!!) (Recommended Single) JG-6072 GE triple mica black plates "O" getter NOS 1962 (2.9/2.3ma) (AKG, Tele 251, Peluso, Rode) (similar sound to 5-Star GE)
(!!!!!) (Best Single #2) JG-6072 GE double mica black plates "O" getter NOS 1963 (3.3/3.1ma) (AKG, Tele 251, Peluso, Rode) (similar sound to 5-Star GE)
(!!!) (Best Single 1950's #2) 12AX7 RCA "tall gray plates" with "D" getter like new mid-1950's (Gm=1.1/0.9ma and Gm=1700/1600) (Gm like new)
(!!!) (Best RCA single #2) 5687 RCA bronze plates NOS 1976 (31.5/34ma)
(!!!!!) (Single) 12BH7 Super Radiotron Australia gray ribbed plates NOS 1960's (9.8/14.2ma) (similar sound to RCA) (McIntosh, VTL, Manley, Quicksilver)
(!!!!) (Best Single 1963) PCC88=7DJ8 Philips Miniwatt Holland "O" getter NOS 1963 (14.2/12.0ma)
(!!!!) (Recommended Single) PCC88=7DJ8 Mullard Holland NOS 1973 (11.5/13.8ma)
