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6S8GT used/good no printing 1950 era (102/60)
6SA7 Ken Rad NOS 1940's (1 in stock)
6SA7GT Delco NOS 1940's (101/60)
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 1962 (3 in stock)
6SB7Y RCA used/good (1 in stock)
6SB7Y US Brands NOS (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)
6SD7GT Continental by National Union NOS 1950 era (11.6ma)
6SD7GT Ken Rad NOS 1940's (11ma)
6SD7GT Ken Rad NOS 1940's (12.6ma)
6SD7GT Raytheon NOS 1940's (11ma)
6SD7GT Raytheon NOS 1951 (11ma)
6SD7GT Raytheon NOS 1956 (9.6ma)
