• Country
• Germany

• Manufacturer / Brand
• FEF-Radio, F. Ehrenfeld; Frankfurt a.M.

• Year
• 1925

• Category
• Kit (Parts plus instruction) or building instructions only

• Radiomuseum.org ID
• 224347

• • Brand: FEF

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

• Number of Tubes
• 6

• Valves / Tubes

• Main principle
• Superheterodyne (common)

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

• Loudspeaker
• - This model requires external speaker(s).

• from Radiomuseum.org
• Model: Ultradyne [6 Röhren] - FEF-Radio, F. Ehrenfeld;

• Shape
• Miscellaneous shapes - described under notes.

• Notes

• Superheterodyne-Baukasten mit 6 Röhren in FEF-Qualität.

  Enthält: Montageplatte, 6 Röhrenfassungen, 3 Heizwiderstände, 1 Potentiometer, 2 Drehkondensatoren mit Skala und Knopf, 1 Satz ZF-Transformatoren, 2 Spezialspulen, 3 Blockkondensatoren, 1 Hochohmwiderstand mit Fassung, 1 Klinkenschalter, 1 Hebelschalter, sämtliche Schrauben, Klemmen und Buchsen.

• Price in first year of sale
• 107.00 Mk

• Mentioned in
• "Der Deutsche Rundfunk" 1925, H.51

• Author
• Model page created by Wolfgang Eckardt. See "Data change" for further contributors.

• Other Models

• Here you find 15 models, 14 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from FEF-Radio, F. Ehrenfeld; Frankfurt a.M.