• Country
• Germany

• Manufacturer / Brand
• Ratag, Radio-Telephon-AG; Berlin

• Year
• 1924/1925

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 16388

• Number of Tubes
• 2

• Valves / Tubes

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: NF-Verstärker - Ratag, Radio-Telephon-AG;

• Notes
• NF-Verstärker zu PR1

• Price in first year of sale
• 28.00 RM

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

• Source of data
• Katalog Prohaska 1928/29 / Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Radiokat. Reichsthaler ca. 1925

• Other Models

• Here you find 23 models, 9 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ratag, Radio-Telephon-AG; Berlin