• Country
• France

• Manufacturer / Brand
• Ducretet (-Thomson; avant: Fernand Ducretet et Ernest Roger etc.); Paris

• Year
• 1922

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 338192

• • alternative name: SED

• Number of Tubes
• 3

• Valves / Tubes
• TM TM TM

• Main principle
• Audio-Amplification; 3 AF stage(s)

• Wave bands
• - without

• Power type and voltage
• Storage and/or dry batteries / 4 & 80 Volt

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

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Amplificateur BF BF 3 [bornes d'alimentations avant] - Ducretet -Thomson; avant:

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 245 x 170 x 110 mm / 9.6 x 6.7 x 4.3 inch

• Notes

• Amplificateur BF à 3 lampes.

  Voir aussi la variante avec les bornes d'alimentations en haute.

   

• Net weight (2.2 lb = 1 kg)
• 2.1 kg / 4 lb 10 oz (4.626 lb)

• Mentioned in
• Le Guide du Collectionneur TSF Biraud/Foster, Vol. I (page 155)

• Author
• Model page created by Musée des Radios Museum. See "Data change" for further contributors.

• Other Models

• Here you find 655 models, 518 with images and 286 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ducretet (-Thomson; avant: Fernand Ducretet et Ernest Roger etc.); Paris