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6S4A Sylvania NOS 1960's (20ma)
6S4A Sylvania triple mica NOS 1960's (20.2ma)
6S4A Tungsol branded GE NOS 1966 (21.5ma)
6S4A Westinghouse NOS 1963 (23ma)
6SF5 GE used/good 1951 (1.1ma Gm=1200)
6SF5 Sylvania used/good 1949 (0.8ma Gm=1100)
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)
6SJ7 RCA metal can like new 1964 (3.5ma)
6SJ7 RCA used/good 1940's (2.8ma)
6SJ7 US Brands used/good (40 in stock)
6SJ7Y=VT-116B RCA used/tests like new 1943 (3.8ma)
6SJ7Y=VT-116B Sylvania brown bottom like new 1940's (3.7ma)
6SK7GT Raytheon used/good/70% 1940's (6.6ma)
6SQ7 GE metal can NOS (1 in stock)
6SQ7 metal used/good (3 in stock)
6SQ7 RCA NOS 1950-1953 (0.8ma) (special price)
6SQ7 RCA NOS 1953 (0.9ma Gm=1400) (High Gm)