99=X-199 Silvertone NOS 1934 (2.5ma, Gm=500) (strong single)

99=X-199 Silvertone NOS 1934

2.5ma

Gm=500

Vplate=90V

Vgrid=-4.5V

Iplate = 2.5ma

Gm=500

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