• Country
• Germany

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

• Year
• 1931/1932

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 156271

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC)

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 22 cm = 8.7 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: Dynamischer Lautsprecher B11 Chassis A11 - Hegra, Hekra, Marke, Hermann

• Shape
• Tablemodel, with any shape - general.

• Notes
• Gleiches Gehäuse wie für B10 und Permanent-Magnet-Dynamik.

• Price in first year of sale
• 74.00 RM

• Literature/Schematics (1)
• Katalog Radio-Zentrale Prohaska 1928 (1931/32, Nr.494)

• Author
• Model page created by Konrad Birkner † 12.08.2014. 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