• Country
• Great Britain (UK)

• Manufacturer / Brand
• Nirvanax Ltd., London

• Year
• 1922

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

• Radiomuseum.org ID
• 76078

• 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
• Wooden case

• from Radiomuseum.org
• Model: The "DUO" Coupling Receiver - Nirvanax Ltd., London

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 10 x 6 x 5.5 inch / 254 x 152 x 140 mm

• Notes

• BBC/PMG stamp; GPO No.225;

• Source of data
• Radio! Radio!

• Mentioned in
• Tickling the Crystal; Sanders (vol.2; p.102)

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

• Other Models

• Here you find 1 models, 1 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nirvanax Ltd., London