• Country
• Great Britain (UK)

• Manufacturer / Brand
• Johnson and Phillips Ltd. (J & P); Charlton, London

• Year
• 1920 ??

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

• Radiomuseum.org ID
• 205364

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

• Main principle
• Crystal or Solid State Detector

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: W/T Receiver Model Tb - Johnson and Phillips Ltd. J &

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

• Dimensions (WHD)
• 7 x 6.25 x 5.63 inch / 178 x 159 x 143 mm

• Notes

• Wireless Telegraphy (W/T) crystal receiver for the Royal Air Force. It has connectors for Buzzer, Telephone and Crystal Potentiometer, binding posts for Aerial and Earth, and primary and secondary inductance switches.

  Model Tb covers the range of 100 - 600 m and uses a carborundum detector.

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

• Other Models

• Here you find 3 models, 3 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Johnson and Phillips Ltd. (J & P); Charlton, London