6SC7 RCA NOS 1959 (1.8/1.7ma)
6SC7 RCA NOS 1959 (2.3/2.0ma)
6SC7=VT-105 Ken Rad used/good 1946 (1.8/1.9ma)
6SC7=VT-105 RCA used/good 1940's (1.4/1.5ma)
6SC7=VT-105 RCA used/good 1940's (1.6/1.7ma)
6SF5 GE used/good 1951 (1.1ma Gm=1200)
6SF5 Sylvania NOS 1960's (1.1ma Gm=1500)
6SF5 Sylvania used/good 1949 (0.8ma Gm=1100)
6SF5 Sylvania used/good 1950's (0.8ma Gm=1400)
6SF7 Raytheon NOS 1955 (13.4ma)
6SF7 Tungsol NOS 1954 (12.8ma)
6SH7 Rauland by RCA metal can NOS 1955 (11ma)
6SH7 RCA metal can NOS (10.3ma)
6SH7 RCA metal can NOS 1955 (10.2ma)
6SJ7 GE used/like new 1966 (3.3ma)
6SK7 FM Co. by GE used/good 1951 (9.6ma)
6SK7 GE metal NOS 1977 in Sylvania box (8.2ma)
6SK7 Ken Rad NOS 1943 (9.6ma)
6SK7GT Raytheon used/good/70% 1940's (6.6ma)
6SK7GT Sylvania Coronado used/good 1940's (7.2ma)
