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(!!!) (Best Single) 6U8A GE Motorola NOS 1977 (15.2ma/9ma)
(!!!) (Recommended Single) JHS-6AN8A Sylvania NOS 1966 (13.6/16.5ma)
(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (4.9/4.6ma and 42/43ma)
(!!) (Best Value Single) ECL82 EI Yugo branded PAN Germany in PAN box NOS 1974 (2.3ma and 42ma)
(!!!) (Mullard Pair) 6BM8=ECL82 RTC by Mullard UK NOS 1975 (2.2/34ma and 2.0/38ma)
12SG7 RCA NOS 1952 (13.4ma)
JAN-CG-12SG7 GE NOS 1959 (10.8ma)
12SG7 Philco NOS 1952 (13ma)
(!!!!!) (Best Single #1) JAN-5691 Philips by Sylvania black plates NOS 1985 (2.4/2.6ma) (Best 6SL7GT sub)
12SG7 Sylvania NOS 1950's (12.2ma)
1U5 Sylvania NOS (107/60)
12SK7GT RCA NOS 1940's (9.0ma)
(!!) (1 Pair) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (8.8ma and 9.4ma) (same Gm)
(!!) (Read Review) 6SH7GT Ken Rad 1950's rebranded Raytheon NOS 1970 (11.2ma and 11.2ma) (close Gm)
(BEST) 14R7 RCA Victor NOS 1940's (98/60)
6F2 China (best sub is 6U8A, 6GH8A) (Dayton Audio HTA amp)
(!!) (Recommended pair) E83F=6689 Philips SQ Holland NOS gold pins 1974 (9.4ma and 9.6ma)
JHS-6U8A Sylvania NOS 1966
(!) (slightly microphonic) 6072 GE branded RCA triple mica black plates "O" getter halo 1960 used/good (2.0/2.0ma)
2A7 Raytheon NOS 1940's (46/29)