• Country
• France

• Manufacturer / Brand
• Grandin, Cristal-Grandin (SFRT); Paris, Montreuil

• Year
• 1956

• Category
• Pre-stage (adaptor for SW/FM/VHF/UHF incl. built-in), Frequency converter

• Radiomuseum.org ID
• 236662

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

• Wave bands
• Short Wave (SW only)

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios)

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Convertisseur OC SW4 - Grandin, Cristal-Grandin SFRT;

• Shape
• Chassis only or for «building in»

• Notes

• Convertisseur OC, 4 gammes 19, 25, 31, 49 m.

• Price in first year of sale
• 10,500.00 FRF

• Mentioned in
• -- Original prospect or advert

• Other Models

• Here you find 281 models, 207 with images and 81 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grandin, Cristal-Grandin (SFRT); Paris, Montreuil