(!!!) (Recommended Pair) JAN-CNU-1625=VT-136 National Union NOS 1940's (80/40 and 78/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1954 (58/40 and 60/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1957 (57/40 and 58/40)
(!!!) (Recommended Single) 5Z3G RCA NOS 1971 (56/40 and 58/40)
(!!!) (Recommended Single) 6SL7GT Ken Rad NOS 1945 era (2.1/2.3ma)
(!!!) (Recommended) 814=VT-154 GE ceramic base like new 1940's (105ma)
(!!!) (Single) 6F6G Marconi Spain NOS 1940's (35.2ma)
(!!!) (Single) 6F8G Tungsol parallel ribbed plates used/good 1940's (7.6/6.7ma)
(!!!) (SINGLE) 807=ATS25 GEC England ceramic base NOS 1940's dark gray plate (59ma)
(!!!) (SINGLE) 807=ATS25 GEC England ceramic base NOS 1940's dark gray plate (64.5ma)
(!!!) (Slightly microphonic Single) 6SL7GT Ken Rad NOS 1945 era (2.6/2.3ma)
(!!!) 231=31 US Made Balloon NOS 1920's (14.2ma)
(!!!) 31 RCA Radiotron Balloon NOS 1920's (13.2ma)
(!!!) 6B4G Tungsol NOS 1940's (81ma)
(!!!) 6SL7GT Sylvania round gray plates like new 1951 (3.7/3.6ma) (Highest mA and Gm)
(!!!) 6SN7GT Raytheon parallel plates NOS 1953 (8.5/10ma)
(!!!) 6V6G RCA used/good 1940's (33.5ma)
(!!!) 6V6G RCA used/good 1940's (38.4ma)
(!!!) 6V6G RCA used/good 1940's (42ma)
(!!!) 76 Crosley by Ken Rad engraved base like new 1930's (5.7ma)
