• Country
• Germany

• Manufacturer / Brand
• Hara (Marke), Heimschutz-Metallwarenfabrik; Berlin O 27

• Year
• 1928/1929

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 14922

• Main principle
• Crystal or Solid State Detector; Crystal-detection 1 circuit (no tubes)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Detektor-Empfänger DE II - Hara Marke, Heimschutz-

• Notes
• schwarzes Holzgehäuse mit großer Hartgummiplatte für Steckspule; Drehko.

• Price in first year of sale
• 10.00 RM

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radio-Diehr, Berlin, 1928/1929 / Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Hara (Marke), Heimschutz-Metallwarenfabrik; Berlin O 27