(!!!) (Best Single) CX-299 Cunningham engraved base NOS 1920's (2.9ma) (X-99=UX-199=CX-299)
By Tube World
$ 69.99
CX-299 Cunningham engraved base NOS 1920's with CX-299 data sheet
2.9ma
Gm=400
SINGLE TUBE - NOT A PAIR
X-99=UX-99=UX-199=CX-299
Vplate=90V
Vgrid= -4.5V
NOS Ma = 2.5ma+
NOS Gm = 400
(UV-99 and UX-99 have a 3.3V @ .063ma Filament, UX base has smaller size pins)
See more: vacuum tube