• Country
• France

• Manufacturer / Brand
• GMR (G.M.R.), Georg, Montastier et Rouge; Montrouge, Paris

• Year
• 1922

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

• Radiomuseum.org ID
• 264221

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Audio-Amplification

• Wave bands
• - without

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Amplificateur BF à 3 lampes - GMR G.M.R., Georg, Montastier

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

• Mentioned in
• -- Original prospect or advert (La T.S.F. Moderne No 24 Juni 1922 p.308)

• Literature/Schematics (3)
• Le Guide du Collectionneur TSF Biraud/Foster, Vol. I (page 177)

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

• Other Models

• Here you find 130 models, 103 with images and 30 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from GMR (G.M.R.), Georg, Montastier et Rouge; Montrouge, Paris