• Year
  • 1930 ?
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 5523

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Audio-Amplification
  • Power type and voltage
  • Alternating Current supply (AC)
  • Loudspeaker
  • - For headphones or amp.
  • from Radiomuseum.org
  • Model: Protofon 3 - Siemens & Halske, -Schuckert
  • Source of data
  • Radiokatalog Band 1, Ernst Erb
  • Circuit diagram reference
  • Röhren in FS-Bestückungstabellen

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