• Country
• Germany

• Manufacturer / Brand
• Gesellschaft für drahtlose Telegraphie System Prof. Braun und Siemens & Halske mbH; Berlin

• Year
• 1922 ??

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 233089

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

• Number of Tubes
• 1

• Valves / Tubes
• RE26

• Main principle
• RF Converter/Adapter (not voltage converter)

• Tuned circuits
• 1 AM circuit(s)

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

• Power type and voltage
• Batteries / addl. power jack / 6 Volt

• Material
• Metal case, TUBES VISIBLE

• from Radiomuseum.org
• Model: Überlagerer EZ290 - Gesellschaft für drahtlose

• Shape
• Tablemodel, slant panel.

• Dimensions (WHD)
• 180 x 160 x 150 mm / 7.1 x 6.3 x 5.9 inch

• Notes

• Frequenzbereich mittels Steckspulen 12,5 bis1000 kHz (300 - 24000 m).

• Net weight (2.2 lb = 1 kg)
• 2 kg / 4 lb 6.5 oz (4.405 lb)

• Mentioned in
• Telefunken-Zeitung (März 1922, Blatt 25)

• Author
• Model page created by Gerhard Eisenbarth. See "Data change" for further contributors.

• Other Models

• Here you find 29 models, 25 with images and 7 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gesellschaft für drahtlose Telegraphie System Prof. Braun und Siemens & Halske mbH; Berlin