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(Best Single) 6SF5 GE NOS 1958 (2.1ma) (strong single)
6SF5 Sylvania NOS 1960's (1.1ma Gm=1500)
6SF5 Sylvania used/good 1950's (0.8ma Gm=1400)
6SF5GT used
6SF7 Raytheon NOS 1955 (13.4ma)
6SG7 metal can used/good
6SG7 RCA metal can NOS 1960-1961 (4 in stock)
6SG7 US Brands metal can NOS (7 in stock)
6SG7GT glass used/good
6SG7GT US Brand branded International NOS (3 in stock)
6SG7Y RCA NOS 1960 (6 in stock)
6SH7 metal used (4 in stock)
6SH7 RCA metal can NOS (10.3ma)
6SH7 RCA metal can NOS 1955 (10.2ma)
6SH7GT Raytheon NOS 1940's (9.5ma)
6SJ7 US Brands used/good (40 in stock)
6SJ7 GE used/like new 1966 (3.3ma)
6SJ7 RCA metal can like new 1964 (3.5ma)
6SK7 FM Co. by GE used/good 1951 (9.6ma)
6SK7 GE metal NOS 1977 in Sylvania box (8.2ma)
