(!!!) (Recommended Pair) 6SC7 GE metal can NOS 1977 (1.7/1.7ma and 1.7/1.8ma) 1-2% matched
(!!!) (Recommended Pair) 6SC7 GE NOS 1977 (1.7/2.1ma and 1.8/2.1ma) 1-3% matched
(!!!) (Recommended Pair) 6V6GT GE NOS 1963 (43ma and 45.5ma)
(!!!) (Recommended Pair) 6X5GT GE NOS 1961-1963 (50-50/40 and 49-49/40 x 2 tubes)
(!!!) (Recommended Pair) 713A Western Electric by Tungsol NOS 1942-1943 (6.6ma and 6.9ma) (713A = 717A with black base)
(!!!) (Recommended Pair) 76 Sylvania NOS - 1 tube branded National Union 1947 era same build (5.3ma and 5.6ma)
(!!!) (Recommended Pair) 83 Sylvania branded RCA NOS 1984 original boxes (61-62/40 and 60-62/40)
(!!!) (Recommended Pair) JAN-1619=VT-164 RCA NOS 1943 some surface rust on metal cans (55ma and 57ma)
(!!!) (Recommended Pair) JAN-CNU-1625=VT-136 National Union NOS 1940's (80/40 and 78/40)
(!!!) (Recommended Pair) JLRV-6J6WA GE Canada NOS 1960's (6.4/6.6ma and 6.6/6.5ma)
(!!!) (Recommended Pair) JLRV-6J6WA GE Canada NOS 1960's (7.3/6.6ma and 6.8/7.5ma)
(!!!) (Recommended Single) 12AX7A Sylvania NOS 1970's (Gm=2500/2800 and 2.2/2.7ma)
(!!!) (Recommended Single) 12AX7A Sylvania NOS 1970's (Gm=2600/3000)
(!!!) (Recommended Single) 5687 Tungsol branded Amperex black plate/bronze-black plate (38ma/43.5ma)
(!!!) (Recommended Single) 5814A GE "5 STAR" with "O" getter halo 1963 (10/14ma)
(!!!) (Recommended Single) 6BK7A Raytheon black plates NOS "D" getter 1950's (7.2/8.2ma) (great sub for 6N1P)
(!!!) (Recommended Single) 6BK7B Tungsol gray plates NOS 1960's (8.0/9.8ma) (great sub for 6N1P)
(!!!) (Recommended Single) 6BQ7A RCA black plates NOS 1962 (10/14ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates "U" getter NOS 1957 (9.0/9.4ma)
(!!!) (Recommended Single) 6BZ7 RCA black plates large "O" getter NOS 1965 (13.0/14.2ma)
