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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)
6SD7GT Sylvania NOS 1940's (11ma)
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 used
6SF7 Sylvania NOS 1950's (12.4ma)
