• Country
• Germany

• Manufacturer / Brand
• Tefi-Apparatebau; Porz bei Köln

• Year
• 1945–1949

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

• Radiomuseum.org ID
• 17237

• 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
• Bakelite case

• from Radiomuseum.org
• Model: Detektor-Empfänger TD1 - Tefi-Apparatebau; Porz bei

• Dimensions (WHD)
• 100 x 25 x 100 mm / 3.9 x 1 x 3.9 inch

• Notes
• .

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Tefifon, Das; Herbert Jüttemann

• Other Models

• Here you find 113 models, 101 with images and 98 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tefi-Apparatebau; Porz bei Köln