• Country
• United States of America (USA)

• Manufacturer / Brand
• Duck Co., J.J. and William B.; Toledo, OH

• Year
• 1920 ?

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 119848

• Main principle
• Tuner pre 1926 (not a wave trap)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: A 520 Junior Loose Coupler - Duck Co., J.J. and William B.;

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 11.75 x 4.5 x 3.5 inch / 298 x 114 x 89 mm

• Price in first year of sale
• 7.00 $

• Source of data
• -- Collector info (Sammler)

• Literature/Schematics (1)
• Duck Catalog No.16

• Author
• Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

• Other Models

• Here you find 57 models, 34 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Duck Co., J.J. and William B.; Toledo, OH