(!) CX-112A RCA Cunningham Balloon engraved base used/good 1930 era (6.2ma)

CX-112A RCA Cunningham Balloon engraved base used/good 1930 era in white box

6.2ma

Gm=1600

Vplate = 180V

Vgrid = -13.5V

Good used Ma = 5.5 - 7ma

Good used Gm = 1400-1600

stamped circular plate structure similar to RCA / Cunningham UX-112A and CX-112A

- RCA Radiola 16 from 1928