12J5GT Sylvania NOS 1940”s (9.6ma Gm=2900)

12J5GT Sylvania NOS 1940”s (9.6ma Gm=2900)

Vplate=250V

Vgrid=-8V

Good Ma range 7-9ma

Good Gm range 2400-2600

– Transition Audio Design custom phono preamp 2010