• Country
• Austria

• Manufacturer / Brand
• Sommer AG, Otto; Wien

• Year
• 1924

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 10712

• Number of Tubes
• 2

• Valves / Tubes

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

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: NF-Verstärker 2 Rö - Sommer AG, Otto; Wien

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 26 models, 7 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sommer AG, Otto; Wien