(!!!) (BEST OVERALL PAIR) 6SF5GT Tungsol NOS 1946 (1.1ma and 1.3ma)
(!) (Good Value Pair) 6SF5 RCA used/good 1948 Pair (0.8ma and 0.8ma)
(Best Single) 6SF5 GE NOS 1958 (2.1ma) (strong single)
(Best Single) 6SF5 RCA NOS 1940's (1.4ma) (strong single)
(BEST SINGLE) 6SF5GT Tungsol NOS 1940's (1.1ma Gm=1500)
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)
6SF5GT Sylvania Philco NOS 1940's (1.1ma Gm=1100)
6SF5GT Tungsol NOS 1949 (0.7ma Gm=1350)
6SF5GT used
