• Year
  • 1926/1927
  • Category
  • Audio Amplifier or -mixer
  • Radiomuseum.org ID
  • 4867
    • alternative name: Telephon-Fabrik, AG vorm. J. Berliner

 Technical Specifications

  • Number of Tubes
  • 3
  • Valves / Tubes
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Storage and/or dry batteries
  • Loudspeaker
  • - For headphones or amp.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: NF-Verstärker [3 Rö.] - Tefag; Telephon
  • Notes
  • End-Röhren im Gegentakt.
  • Source of data
  • Radiokatalog Band 1, Ernst Erb
  • Circuit diagram reference
  • Info Dr. H. Börner without schematic

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