• Country
• Great Britain (UK)

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

• Year
• 1918 ?

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

• Radiomuseum.org ID
• 308244

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 / 2 x 3 Volt

• Loudspeaker
• - For headphones or amp.

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

• from Radiomuseum.org
• Model: Short Wave Tuner Mark III* - Johnson and Phillips Ltd. J &

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

• Dimensions (WHD)
• 350 x 200 x 310 mm / 13.8 x 7.9 x 12.2 inch

• Notes

• In robust rectangular, black canvas covered wooden box with handle and removable hinged lid. After opening the lid we see an ebonite panel with two rotary switches, two double knife switches, two tuning knobs, a clutch control, a potentiometer control, a small knife switch, a push button for a buzzer, a Perikon detector with crystal, a carborundum detector, eight copper terminals and four wires (two white and two black) equipped with spade terminals. There are two lockable compartments, one in the lid and one next to the front plate. A battery can be placed there that provides pre-tension on the crystal and power for the buzzer. Above that there is a compartment for the headphones. The compartment in the lid contains twelve spare mounted mineral crystals for use in the Perikon detector. There is a nickel-plated circular holder in the lid for a pocket watch and wooden brackets for holding maps.

  The wave range is 100-700 meters.

  There is also a previous version Short Wave Tuner Mark III (without asterisk), introduced in 1916.

• Net weight (2.2 lb = 1 kg)
• 7.3 kg / 16 lb 1.3 oz (16.079 lb)

• Mentioned in
• Radio! Radio!

• Literature/Schematics (1)
• -- Schematic

• Author
• Model page created by John Koster. 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