• Country
• Germany

• Manufacturer / Brand
• Ketterer Söhne, B.; Furtwangen/Baden

• Year
• 1924 ?

• Category
• RF (Radio Frequency-) Amplifier

• Radiomuseum.org ID
• 15313

• Number of Tubes
• 1

• Valves / Tubes

• Tuned circuits
• 1 AM circuit(s)

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: HF-Verstärker - Ketterer Söhne, B.; Furtwangen

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Other Models

• Here you find 5 models, 0 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ketterer Söhne, B.; Furtwangen/Baden