• Country
• Switzerland

• Manufacturer / Brand
• Autophon AG (inkl. Téléphonie SA); Solothurn

• Year
• 1950/1951

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 11405

• Number of Tubes
• 8

• Valves / Tubes
• EF40 EF40 EF41 EF41 EL34 EL34 AZ21 AZ21

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC)

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

• from Radiomuseum.org
• Model: NF-Verstärker NV20-8 - Autophon AG inkl. Téléphonie

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Circuit diagram reference
• Die Tungsram-Tabellen führen das Modell auf.

• Other Models

• Here you find 244 models, 187 with images and 148 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Autophon AG (inkl. Téléphonie SA); Solothurn