• Country
• Great Britain (UK)

• Manufacturer / Brand
• Ericsson Telephones / British Ericsson / Etelco (ETL); London

• Year
• 1924 ?

• Category
• Loudspeaker, headphone or earphone

• Radiomuseum.org ID
• 140897

Click on the schematic thumbnail to request the schematic as a free document.

• Main principle
• none

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - Is a Headphone or Earphone

• Material
• Metal case

• from Radiomuseum.org
• Model: Wireless Head Phones 4000 Ohms o/716 - Ericsson Telephones / British

• Shape
• Miscellaneous shapes - described under notes.

• Dimensions (WHD)
• 180 x 170 x 60 mm / 7.1 x 6.7 x 2.4 inch

• Notes
• Adjustable headphone, two aluminium head bands. 4000 Ohms resistance, early BBC stamp.

• Net weight (2.2 lb = 1 kg)
• 0.5 kg / 1 lb 1.6 oz (1.101 lb)

• Source of data
• - - Data from my own collection

• Author
• Model page created by Nikolaus Löwe. See "Data change" for further contributors.

• Other Models

• Here you find 13 models, 12 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Ericsson Telephones / British Ericsson / Etelco (ETL); London