• 31

  • First year: 1930
  • Base: UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
  • Filament: Vf 2 Volts / If 0.13 Ampere / Direct / Battery = /
  • Identical to: 31 = 131 = VT-31 = CX331 = 231 = RCA231 = CV947 = PH231 = 431 = ER231
  • Tube type: Triode, vacuum Power/Output
  • Published by:

    dido