• Country
• Germany

• Manufacturer / Brand
• Fernfunk, Gesellschaft für drahtlose Telefonie mbH; Berlin

• Year
• 1927/1928

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

• Radiomuseum.org ID
• 14519

• • Brand: GRB, Ges. für Radiobedarf mbH

• Main principle
• Crystal or Solid State Detector; Crystal-detection 2 circuits (no tubes)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Detektor-Empfänger - Fernfunk, Gesellschaft für

• Notes
• Flachpult; Steckspule, 500-cm-Drehko

• Price in first year of sale
• 10.00 RM

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

• Source of data
• Katalog Radio-Zentrale Prohaska 1928 / Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 66 models, 41 with images and 5 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Fernfunk, Gesellschaft für drahtlose Telefonie mbH; Berlin