• Country
• Germany

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

• Year
• 1929–1932

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 156276

• Wave bands
• - without

• Power type and voltage
• Direct Current supply (DC) / 110-220 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Metal case

• from Radiomuseum.org
• Model: Dynamik A1 [Chassis] - Hegra, Hekra, Marke, Hermann

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 260 x 270 x 190 mm / 10.2 x 10.6 x 7.5 inch

• Notes
• Lautsprecher mit Transformator und niederohmiger Schwingspule. verwendet im B2/A1 Gehäuselautsprecher.

• Net weight (2.2 lb = 1 kg)
• 4.1 kg / 9 lb 0.5 oz (9.031 lb)

• Price in first year of sale
• 68.00 RM

• Mentioned in
• A. Stark, Preisliste 1929

• Literature/Schematics (1)
• Katalog Radio-Zentrale Prohaska 1928 (1931/32, Nr.497)

• 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