• Country
• Germany

• Manufacturer / Brand
• Koch & Sterzel AG; Dresden

• Year
• 1929/1930

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 71471

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 6

• Valves / Tubes

• Main principle
• TRF without regeneration; Neutrodyne

• from Radiomuseum.org
• Model: ER640 II - Koch & Sterzel AG; Dresden

• Notes
• Spulen und Röhren sind total abgeschirmt. Schaltkontakte versilbert.

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Author
• Model page created by Arpad Roth † 27.3.17. See "Data change" for further contributors.

• Other Models

• Here you find 75 models, 42 with images and 14 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Koch & Sterzel AG; Dresden