• Country
• Germany

• Manufacturer / Brand
• Efa, Werkstätten für Elektrotechnik und Feinmechanik; Berlin

• Year
• 1928

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 355593

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - Is a Headphone or Earphone

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Doppelkopfhörer - Efa, Werkstätten für

• Notes

• Impedance:  2 x 2000 Ω.

• Author
• Model page created by Hannes Wurnitsch. See "Data change" for further contributors.

• Other Models

• Here you find 1 models, with images and with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Efa, Werkstätten für Elektrotechnik und Feinmechanik; Berlin