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6SK7 Sylvania NOS 1951 (8.8ma)
6SK7 Ken Rad NOS 1943 (9.6ma)
6SK7GT Sylvania used/good 1940's (7.3ma)
6SK7GT Raytheon used/good/70% 1940's (6.6ma)
6SL7GT Brimar NOS black base black plates 1950's (2.2/2.4ma) (slightly microphonic)
(!!) 6SL7GT Sylvania NOS branded Westinghouse tall bottle 1955 (2.8/2.7ma)
6SN7GTA CBS NOS Black Ribbed Plates similar to RCA early 1950's (8.3/8.6ma)
6SN7GTB CBS black base black plates side-getter, the same shape as Sylvania 6SN7GTB used/good 1961 (7.5/8.0ma)
(!!) (Recommended) 6SN7GTB Raytheon gray plates low hours/like new 1960's (9/10ma)
6SN7GTB RCA used good 1960's (6.4/8.2ma)
6SN7WGT Raytheon brown base black ribbed plates "D" getter halo 1959 used/good (6.2/8.4ma)
6SQ7 metal used/good (3 in stock)
6SQ7 GE metal can NOS (1 in stock)
6SQ7GT Sylvania used/good 1951 (Gm=800)
6SR7 US Brands metal can NOS (15 in stock)
6SS7 Dumont NOS
6ST7 RCA NOS
6SV7 Raytheon NOS
6SZ7 RCA NOS
6T10 US Brands NOS (8 in stock)
