• Country
• Germany

• Manufacturer / Brand
• Nora, Aron, Heliowatt; Berlin

• Year
• 1928–1934

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 8132

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - Is a Headphone or Earphone

• from Radiomuseum.org
• Model: Doppelkopfhörer KC - Nora, Aron, Heliowatt; Berlin

• Notes
• 4000 Ohm, 175 g, schwarze Pressmasse.

• Price in first year of sale
• 9.00 RM

• Source of data
• Radio-Diehr, Berlin, 1928/1929 / Radiokatalog Band 1, Ernst Erb

• Mentioned in
• Radio-Zentrale Prohaska 1933/34

• Other Models

• Here you find 633 models, 556 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nora, Aron, Heliowatt; Berlin