• Country
• Germany

• Manufacturer / Brand
• Gierner & Sohn (Giso); Hamburg

• Year
• 1925

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 14805

• • Brand: GISO

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

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

• Loudspeaker
• - For headphones or amp.

• from Radiomuseum.org
• Model: AL3 - Gierner & Sohn Giso; Hamburg

• Notes
• "Lautsprech-Apparat".

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

• Source of data
• Radiokatalog Band 2, Ernst Erb

• Mentioned in
• Historische Radios Band III (98)

• Other Models

• Here you find 12 models, 1 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gierner & Sohn (Giso); Hamburg