• Country
• Germany

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

• Year
• 1931/1932

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 156274

• 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
• Metal case

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

• Shape
• Chassis only or for «building in»

• Notes
• verwendet im B11 Gehäuselautsprecher.

• Price in first year of sale
• 59.00 RM

• Literature/Schematics (1)
• Katalog Radio-Zentrale Prohaska 1928 (1931/32, Nr.493)

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 119 models, 109 with images and 5 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