• Country
• Germany

• Manufacturer / Brand
• Unda-Apparatebau, Convida AG; München

• Year
• 1924/1925

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 17480

• • alternative name: Condiva AG; München

• Number of Tubes
• 1

• Valves / Tubes

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

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: NF-Verstärker - Unda-Apparatebau, Convida AG;

• Notes
• für Detektor-Apparat

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Historische Radios Band IV (127)

• Other Models

• Here you find 12 models, 9 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Unda-Apparatebau, Convida AG; München