• Country
• Germany

• Manufacturer / Brand
• Hegra, Hekra, (Marke), Hermann Grau, Berlin-Friedrichshagen - Vorkrieg

• Year
• 1929

• Category
• Microphone or Pick-up element

• Radiomuseum.org ID
• 273657

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Schalldose Form B - Hegra, Hekra, Marke, Hermann

• Shape
• Chassis only or for «building in»

• Price in first year of sale
• 12.00 RM

• Mentioned in
• A. Stark, Preisliste 1929

• Author
• Model page created by a member from D. See "Data change" for further contributors.

• Other Models

• Here you find 117 models, 99 with images and 4 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hegra, Hekra, (Marke), Hermann Grau, Berlin-Friedrichshagen - Vorkrieg