• Country
• Germany

• Manufacturer / Brand
• Wisi (Wilh. Sihn); Niefern bei Pforzheim

• Year
• 1952/1953

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

• Radiomuseum.org ID
• 17659

• • Brand: Sihn jr., Wilhelm; Niefern

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

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Detektor-Empfänger 57R1 - Wisi Wilh. Sihn; Niefern bei

• Dimensions (WHD)
• 75 x 35 x 95 mm / 3 x 1.4 x 3.7 inch

• Notes
• 57R2 für KW, 57R3 für LW

• Price in first year of sale
• 9.00 DM

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 141 models, 105 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Wisi (Wilh. Sihn); Niefern bei Pforzheim