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(!!!) 6SN7GTB Tungsol brown base "U" getter used/good 1950's (7.0/8.2ma)
(!!) (Best Single) 6AN8A Sylvania branded National U getter NOS 1960 era (18/16.2ma)
(!!) (Single) 12AU7 Tungsol gray ribbed plates D getter NOS 1957 (11.5/8ma)
(!!) (Single) 6F8G Philco by Sylvania parallel plates used/good 1940's (10.2ma and 7.2ma) (close Gm)
(!!) (slightly microphonic) 12AU7A Raytheon black ribbed plates "D" getter halo black coated glass 1951 (8.8/9.6ma)
(!!) 6AN8A Sylvania branded National U getter NOS 1960 era (16.6/15ma)
(!!) 6AN8A Sylvania Magnavox NOS 1972 (14.5/14.8ma)
(!!) 6K6GT Philco by National Union coated glass 1953 (46.5ma)
(!!) 6K6GT Philco by Sylvabia NOS 1950-1951 (49ma)
(!!) 6V6GT Philco by Sylvania tests like new 1957 (42.2ma)
(READ REVIEW) 6SN7GT Tungsol tests like new black coated glass and black round plates 1945 (9.2/9.0ma) (close triode balance)
1635 RCA coated glass NOS 1950-1953 (2 in stock)
6A3 Ken Rad coated glass NOS 1950 (82ma)
6A3 RCA Victor NOS 1948-1949 (62ma)
6A3 Tungsol coated glass used/good 1940's (44ma)
6A3 Tungsol coated glass used/good 1940's (60ma)
6AC5GT Sylvania NOS 1940's (39/21)
6B4G Ken Rad branded RCA coated glass NOS 1946 (110ma)
6F8G Raytheon staggered black ribbed plates used/strong 1940's (7.6ma and 8.8ma)
KT66 GEC UK brown base used/70% 1966 (64ma)
