• Country
• United States of America (USA)

• Manufacturer / Brand
• Bowman & Co., A.W.; Boston, Massachusetts

• Year
• 1921–1923

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

• Radiomuseum.org ID
• 198253

• Main principle
• Crystal or Solid State Detector

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Crystal Detector and Test Buzzer Unit - Bowman & Co., A.W.; Boston,

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 5 x 5 x 0 inch / 127 x 127 x 0 mm

• Notes
• A. W. Bowman Crystal Detector and Test Buzzer Unit.
  In the 1921-1923 Sears, Roebuck and Co. Radio catalogs, Sears offered a series of Unit panels that were produced by the Bowman Company. The panels were each 5 inches square and could be joined together to form a complete receiver.

• Net weight (2.2 lb = 1 kg)
• 1 lb (1 lb 0 oz) / 0.454 kg

• Price in first year of sale
• 6.00 $

• Literature/Schematics (1)
• 1923 Sears & Roebuck Radio Catalog

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 32 models, 31 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Bowman & Co., A.W.; Boston, Massachusetts