• Country
• United States of America (USA)

• Manufacturer / Brand
• Alden Wireless Company; Brockton, Massachusetts

• Year
• 1912

• Category
• Amateur Equipment (Other, but not Key)

• Radiomuseum.org ID
• 281423

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Various materials

• from Radiomuseum.org
• Model: Spark Gap No. 21 - Alden Wireless Company;

• Shape
• Tablemodel, with any shape - general.

• Notes

• Alden Wireless Co. No. 21 1/2 K.W Spark Gap

• Price in first year of sale
• 4.00 $

• Mentioned in
• January 1912, Modern Electrics magazine page 742

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

• Other Models

• Here you find 3 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Alden Wireless Company; Brockton, Massachusetts