• Country
• Germany

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

• Year
• 1927/1928

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 16924

• • Brand: Mars

• Number of Tubes
• 6

• Valves / Tubes

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown); 2 Special; 2 AF stage(s)

• Tuned circuits
• 3 AM circuit(s)

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

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Bausatz SO3A3N - Schneider-Opel AG, Radiowerke;

• Notes
• «Tertiär-Empf.»

• Price in first year of sale
• 198.00 RM +

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

• Source of data
• Kat. Radio Schnorr 1927/28 / Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 127 models, 79 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