• Country
• France

• Manufacturer / Brand
• Graff, Paul (Cosmophone); Paris

• Year
• 1923 ?

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 264510

• Number of Tubes
• 2

• Valves / Tubes

• Main principle
• Audio-Amplification

• Wave bands
• - without

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

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

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Cosmophone Amplificateur BF 910 - Graff, Paul Cosmophone; Paris

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

• Notes

• Amplificateur a 2 lampes BF.

• Mentioned in
• -- Original prospect or advert

• Literature/Schematics (2)
• Le Guide du Collectionneur TSF Biraud/Foster, Vol. I (page 190)

• Author
• Model page created by Ernst Erb. See "Data change" for further contributors.

• Other Models

• Here you find 15 models, 6 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Graff, Paul (Cosmophone); Paris