• Country
• Germany

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

• Year
• 1937 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 244559

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (4 magnet poles).

• Material
• Metal case

• from Radiomuseum.org
• Model: Speaker DRI r93 - Hegra, Hekra, Marke, Hermann

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 180 x 190 x 90 mm / 7.1 x 7.5 x 3.5 inch

• Author
• Model page created by Sándor Selyem-Tóth. 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