• Country
• Germany

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

• Year
• 1922 ??

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 232934

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

• Number of Tubes
• 2

• Valves / Tubes
• RE11 RE11

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries / 6 & 50 Volt

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Niederfrequenz-Verstärker EV285 - Gesellschaft für drahtlose

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 225 x 200 x 90 mm / 8.9 x 7.9 x 3.5 inch

• Net weight (2.2 lb = 1 kg)
• 4.750 kg / 10 lb 7.4 oz (10.463 lb)

• Mentioned in
• Telefunken-Zeitung

• 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