CX-299=99 Cunningham NOS 1930 era (2.1ma)

CX-299=99 Cunningham NOS 1930 era with tube data sheet

Vplate=90V

Vgrid= -4.5V

Ma = 2.1ma

Gm=300

(UV-99 and UX-99 have a 3.3V @ .063ma Filament, UX base has smaller size pins)