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(!!!!) (Recommended Pair) 6EW7 Hitachi Japan branded Westinghouse BIG BOTTLE NOS 1970-1972 (4.9/4.6ma and 42/43ma)
(!!!!) (Recommended Pair) 71A Westinghouse Canada NOS 1949 in white boxes (23ma and 27.3ma)
(!!!!) (Recommended Pair) JAN-12AT7WC Philips by Sylvania black plates NOS 1981-1982 (8.3/8.4ma and 8.4/7.8ma)
(!!!!) (Recommended Single 1957) 12AU7A Zenith Sylvania D getter NOS 1957 (13.0/13.2ma)
(!!!!) (Recommended Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.6/10.8mA)
(!!!!) (Recommended Single) E188CC=7308 Telefunken <> bottom gold pins used/good 1969 era (13.2ma/14.8ma) (rare)
(!!!!) (Set of 10) 5842Q Raytheon NOS 1983 (10 tubes for $279.99) (all test between 19ma-24ma
(!!!!) (Single 1958) 5751 Sylvania black plates triple mica D getter halo 1958 used/good (2.7/2.3ma)
(!!!!) (Single) 12AU7 RCA Italy ribbed plates NOS 1960's (8/10.6ma)
(!!!!) (Single) 12BH7 Tungsol branded Shield gray oval plates "U" getter halo NOS 1961 (11.8/16.5ma) (Highest mA and Gm)
(!!!!) (Single) 12BH7A GE gray oval plates 1962 (6.6/9.6ma)
(!!!!) (Single) 12BH7A Sylvania gray oval plates "O" getter NOS 1960 era (10.4/7.6ma)
(!!!!) (Single) 12BH7A Sylvania Silvertone gray oval plates large "O" getter halo 1960 era NOS (11.5/10.6ma)
(!!!!) (Single) 5691 RCA branded GE red base black plates NOS 1960's a few vertical scratches on base (2.1ma/2.3ma)
(!!!!) (Single) 5691 RCA branded GE red base gray plates NOS 1960's (2.1ma/2.4ma)
(!!!!) (Single) 5692 RCA RED BASE black plates used/good 1953 (7/8ma) (Schiit Saga+)
(!!!!) (Single) 6DJ8=ECC88 Mullard Holland NOS 1963 (16.6/20.6ma) (Nova)
(!!!!) (Single) 6SN7GT RCA NOS 1954 (7.8/7.6ma)
(!!!!) (Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.8/8.6ma)
(!!!!) (Single) E83CC=12AX7 Siemens Halske Germany NOS 1976 (0.7/0.9ma and Gm=1400/1600)
