• Country
• Great Britain (UK)

• Manufacturer / Brand
• Siemens Bros.; London

• Year
• 1923

• Category
• Detector-Radio (Crystal or diode, without tubes/transistors)

• Radiomuseum.org ID
• 76743

• Main principle
• Crystal or Solid State Detector

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - For headphones or amp.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Portable No.707 - Siemens Bros.; London

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 9.75 x 3.5 x 14 inch / 248 x 89 x 356 mm

• Notes
• Attaché case style with handle and key lock; BBC/PMG stamp, GPO No.599;

• Source of data
• Tickling the Crystal; Sanders

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

• Other Models

• Here you find 14 models, 14 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Siemens Bros.; London