• 55

  • First year: 1931
  • Base: 6-Pin-Base U6A, old, USA (Codex=Ka)
  • Filament: Vf 2.5 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC) /
  • Identical to: 55 = UZ-55 = A255 = CV2537 = PH55 = 255
  • Tube type: Double Diode-Triode Audio Frequency
  • Published by:

    dido