• Country
• United States of America (USA)

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

• Year
• 1921

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 84402

• Number of Tubes
• 3

• Valves / Tubes
• UV200 or C300 UV201 or C301 UV201 or C301

• Main principle
• Detector with Vacuum Tube (Valve), no tuner; 2 AF stage(s)

• Wave bands
• - without

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

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: A207 Combination Detector and Amplifier - Duck Co., J.J. and William B.;

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 24 x 12 x 8 inch / 610 x 305 x 203 mm

• Notes
• May be connected to use the detector tube with our without the 2 stage audio amp.

• Price in first year of sale
• 140.00 $

• Literature/Schematics (1)
• William B.Duck Catalog No.16 (1921), p.67

• 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