• Country
• Germany

• Manufacturer / Brand
• Falk, Hans, & Co., Radio Trading Company; Berlin

• Year
• 1923/1924

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 16153

• Number of Tubes
• 2

• 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 ZV57a - Falk, Hans, & Co., Radio

• Notes
• Import? "Radio" 1923 S. 367

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Info Dr. H. Börner without schematic

• Other Models

• Here you find 2 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Falk, Hans, & Co., Radio Trading Company; Berlin