(!!!) (Best Pair) 6SK7 GE NOS 1969 (9.0ma and 8.8ma)
(!!) (Recommended Pair) 6SK7 Sylvania NOS 1950 era (9.2ma and 9.0ma)
(!) (SET OF 3) 6SK7 RCA used/good 1940's (7.5ma/7.8ma/7.8ma) (good value)
(!) 6SK7GT GM Delco NOS 1940's (8.8ma)
(!) 6SK7GT Philco by Sylvania chrome top 1952 (10ma)
6SK7 FM Co. by GE used/good 1951 (9.6ma)
6SK7 GE metal NOS 1977 in Sylvania box (8.2ma)
6SK7 Ken Rad metal can NOS 1950 (9.2ma)
6SK7 Ken Rad NOS 1943 (9.6ma)
6SK7 Ken Rad NOS 1950 (9.2ma)
6SK7GT Raytheon used/good/70% 1940's (6.6ma)
6SK7GT Sylvania Coronado used/good 1940's (7.2ma)
6SK7GT Sylvania FM Co. used/good 1940's (8.2ma)
6SK7GT Sylvania used/good 1940's (7.3ma)
6SK7GT Zenith by Sylvania used/strong 1940's (9ma)
