• Country
• Switzerland

• Manufacturer / Brand
• Radiofee, Ernst Hirschi und Radio-House; Zürich

• Year
• 1924

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 13440

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Audio-Amplification

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: NF-Verstärker - Radiofee, Ernst Hirschi und

• Notes
• gem. Anzeige mit Bild im Führer zur Exp.Nat.Genf Mai 1924

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 5 models, 3 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radiofee, Ernst Hirschi und Radio-House; Zürich