• Country
• United States of America (USA)

• Manufacturer / Brand
• Holtzer-Cabot Electric Co., (The); Boston, Massachusetts

• Year
• 1923 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 69128

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• Horn

• Material
• Bakelite case

• from Radiomuseum.org
• Model: National Horn Speaker - Holtzer-Cabot Electric Co.,

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 12 x 22.5 x 0 inch / 305 x 572 x 0 mm

• Notes
• Adjustable Control.
  Price later reduced to $12.00

• Price in first year of sale
• 25.00 $

• External source of data
• Konrad Birkner

• Literature/Schematics (1)
• Ad in Radio News, March 1924

• Literature/Schematics (2)
• Radio Broadcast, Nov. 1925, p. 102

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

• Other Models

• Here you find 7 models, 6 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Holtzer-Cabot Electric Co., (The); Boston, Massachusetts