• A409

  • First year: 1925
  • Base: Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
  • Filament: Vf 4 Volts / If 0.06 Ampere / Direct / Battery = /
  • Identical to: A409 = PM3X = 1-409 = Spheria
  • Tube type: Triode, vacuum Universal

  • Published by:

    dido
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