• Country
• Germany

• Manufacturer / Brand
• Birgfeld AG, W.A; Berlin

• Year
• 1923/1924

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 14048

• • Brand: Broadcast AG

• Number of Tubes
• 3

• Valves / Tubes

• Main principle
• Audio-Amplification

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

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: NV3a - Birgfeld AG, W.A; Berlin

• Notes
•  

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Info Dr. H. Börner without schematic

• Other Models

• Here you find 20 models, 15 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Birgfeld AG, W.A; Berlin