• Country
• United States of America (USA)

• Manufacturer / Brand
• Gundlach-Manhattan Optical Co.; Rochester, New York

• Year
• 1926

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 43784

• Main principle
• Crystal or Solid State Detector

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Various materials

• from Radiomuseum.org
• Model: Korona Crystal - Gundlach-Manhattan Optical Co.

• Shape
• Miscellaneous shapes - described under notes.

• Notes
• Breadboard. One dial (primary tuning control knob)

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Other Models

• Here you find 4 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Gundlach-Manhattan Optical Co.; Rochester, New York