• Country
• Germany

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

• Year
• 1925/1926

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 16391

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

• Loudspeaker
• - For headphones or amp.

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

• Notes
• NF-Verstärker

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Historische Radios Band III (231)

• 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