• Country
• France

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

• Year
• 1935

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37574

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes
• 6D6 6A7 6B7 42 80

• Main principle
• Superhet with RF-stage; ZF/IF 122 kHz; Reflex

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Alternating Current supply (AC) / 110-240 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Echo 625 - GMR G.M.R., Georg, Montastier

• Shape
• Tablemodel, low profile (big size).

• External source of data
• Serge Laffont/Martin Renoth

• Mentioned in
• Schémathèque Toute la Radio (STR) (No. 223)

• 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