• Country
• Germany

• Manufacturer / Brand
• DERA, Deutsche Radiogesellschaft; Gomaringen

• Year
• 1925/1926

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 14141

• Number of Tubes
• 2

• Valves / Tubes

• Main principle
• Audio-Amplification

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: NF-Verstärker ZN111 - DERA, Deutsche

• Notes
• zu ER109

• Price in first year of sale
• 65.00 RM +

• 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

• Picture reference
• Das Modell ist im «Radiokatalog» (Erb) abgebildet.

• Other Models

• Here you find 6 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from DERA, Deutsche Radiogesellschaft; Gomaringen