• Country
• Germany

• Manufacturer / Brand
• Radiofrequenz GmbH; Berlin-Friedenau (später Loewe)

• Year
• 1924/1925

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 16267

• • Brand: Ges. für Radiotelephonie mbH

• Main principle
• Crystal or Solid State Detector; Crystal-detection 1 circuit (no tubes)

• Tuned circuits
• 1 AM circuit(s)

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: Detektor-Empfänger EA981 - Radiofrequenz GmbH; Berlin-

• Notes
•  

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 29 models, 19 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Radiofrequenz GmbH; Berlin-Friedenau (später Loewe)