(!!!) (Best Single) 12AX7 Triotron by Philips Holland NOS 1966 (1.7/1.5ma and Gm=2000/1900)
(!!!) (Best Value Single) 12AX7 Triotron by Philips Canada NOS 1963 (1.3/1.5ma and Gm=1800/1900)(same sound as Holland)
AF7 Miniwatt used/good 1930's
AF7 Triotron used/good 1940's
