• Country
• Germany

• Manufacturer / Brand
• Schneider-Opel AG, Radiowerke; Frankfurt a.M., später Berlin

• Year
• 1924/1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 16897

• • Brand: Mars

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

• Number of Tubes
• 4

• Valves / Tubes

• Main principle
• TRF without regeneration; 2 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

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

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

• from Radiomuseum.org
• Model: 4-Röhrenempfänger - Schneider-Opel AG, Radiowerke;

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Radio-Umschau (RU, 68) (2408)

• Literature/Schematics (1)
• Banneitz, Taschenbuch d. drahtlosen Telegraphie u. Telephonie, 1927, S.876ff

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 133 models, 92 with images and 20 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Schneider-Opel AG, Radiowerke; Frankfurt a.M., später Berlin