6N7=VT-96 RCA used/test like new mid-1940's (3.1/3.2ma) 1-2% section balance
6N7=VT-96 RCA used/test like new mid-1940's (3.5/3.8ma)
6N7GT RCA branded GE NOS 1940's (2.8/2.9ma) (Highest Gm)
6N7GT RCA branded Philco NOS 1940's (2.7/2.9ma)
6N7GT RCA branded Sylvania NOS 1950's (2.5/2.6ma)
6N7GT RCA NOS 1940's (2.5/3.1ma)
6N7GT RCA used/good 1940's (2.4/2.3ma)
6R7 Sylvania metal used/like new 1940's (88/48)
6SA7 Ken Rad NOS 1940's (1 in stock)
6SA7 Sylvania NOS 1950's (98/60)
6SA7GT Delco NOS 1940's (101/60)
6SA7GT Delco NOS 1940's (94/50)
6SA7GT GE NOS 1943 (96/60)
6SA7GT National Union NOS 1950 era (100/60)
6SA7GT Sylvania NOS 1954 (100/60)
6SA7GTY National Union NOS 1952
6SB7Y GE NOS 1962 (3 in stock)
6SB7Y RCA used/good (1 in stock)
6SB7Y Sylvania NOS 1960's (1 in stock)
6SB7Y US Brands NOS (1 in stock)
