• Country
• Germany

• Manufacturer / Brand
• Deradio AG (später mit Zusatz: E. Schwaan & Zimmermann); Berlin

• Year
• 1924/1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 194468

• • Brand: Schwaan & Zimmermann AG, Berlin O 27

• Number of Tubes
• 1

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: B1 - Deradio AG später mit Zusatz:

• Shape
• Tablemodel, slant panel.

• Dimensions (WHD)
• 140 x 120 x 190 mm / 5.5 x 4.7 x 7.5 inch

• Notes
• Einröhren Audion.

• Author
• Model page created by Wilfried Winter. See "Data change" for further contributors.

• Other Models

• Here you find 20 models, 3 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Deradio AG (später mit Zusatz: E. Schwaan & Zimmermann); Berlin