• Country
• Germany

• Manufacturer / Brand
• Isophon, E. Fritz & Co. GmbH.; Berlin

• Year
• 1933/1934

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 73427

• • Brand: Isophon

• Power type and voltage
• No Power needed

• Loudspeaker
• Magnetic loudspeaker (reed) of high quality (free mooving - only possible past 1931).

• Material
• Wooden case

• from Radiomuseum.org
• Model: Freischwinger F404 - Isophon, E. Fritz & Co. GmbH.;

• Dimensions (WHD)
• 350 x 325 x 155 mm / 13.8 x 12.8 x 6.1 inch

• Notes
• "Der billige Volkslautsprecher mit überragender Leistung".

• Price in first year of sale
• 26.00 RM

• External source of data
• Illustrierter Radio-Katalog 1933/34 S.43

• Source of data
• Radiokatalog Band 2, Ernst Erb

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

• Other Models

• Here you find 252 models, 241 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Isophon, E. Fritz & Co. GmbH.; Berlin