• Country
• Germany

• Manufacturer / Brand
• Nora, Aron, Heliowatt; Berlin

• Year
• 1928 ??

• Category
• Radio part (not a module) 

• Radiomuseum.org ID
• 8115

• Main principle
• Crystal or Solid State Detector

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• from Radiomuseum.org
• Model: Aufsteck-Detektor KDa - Nora, Aron, Heliowatt; Berlin

• Notes
• Aufsteck-Detektor in Glas für Kristall-Tabletten mit Nadelfederung.

• Price in first year of sale
• 4.00 RM

• Source of data
• Radio-Diehr, Berlin, 1928/1929 / Radiokatalog Band 1, Ernst Erb

• Other Models

• Here you find 633 models, 556 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nora, Aron, Heliowatt; Berlin