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6SA7GT Delco NOS 1940's (94/50)
6SA7GT GE NOS 1943 (96/60)
6SA7GT RCA NOS 1940's (95/60)
6SA7GT RCA NOS 1950's (95/60)
6SA7GT Sylvania NOS 1940's (97/60)
6SA7GT Sylvania NOS 1940's (98/60)
6SB7Y GE NOS 1957 (67/40)
6SB7Y GE NOS 1962 (2 in stock)
6SB7Y RCA used/good (1 in stock)
6SC7 GE NOS 1970 era (1.6/1.7ma) 1-2% section balance
6SC7=VT-105 RCA used/good 1940's (1.4/1.5ma)
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 Sylvania NOS 1950's (12.4ma)
6SF7 Tungsol NOS 1954 (12.4ma)
6SH7 Rauland by RCA metal can NOS 1955 (11ma)
6SH7 RCA metal can NOS (10.3ma)
6SH7 RCA metal can NOS 1955 (10.2ma)
