• Country
• Great Britain (UK)

• Manufacturer / Brand
• Philips Electrical, Lamps, Industrial - Miniwatt; London

• Year
• 1930/1931

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 331993

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

• Number of Tubes
• 4

• Valves / Tubes
• A442 or B442 A416 A415 B443

• Main principle
• TRF with regeneration; 2 AF stage(s); Reaction

• Wave bands
• Broadcast (MW) and Long Wave.

• Power type and voltage
• Storage and/or dry batteries / 2 & 4 & 100-110V & 15 Volt

• Loudspeaker
• -Loudspeaker incorporated, but system not known. / Ø 11 inch = 27.9 cm

• Power out
• 0.4 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: Portable Radio 2540 - Philips Electrical, Lamps,

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

• Dimensions (WHD)
• 400 x 460 x 240 mm / 15.7 x 18.1 x 9.4 inch

• Notes

• This radio has a turntable or swivel base to orient the cabinet and access the controls that are on the back.

  The circuit has an RF amplifier stage and a reaction detection stage.

  The radio has a built-in speaker, internal loop antenna and external antenna inputs, ground and input for pick up, with output for external speaker.

  The medium wave band ranges from 500 to 200 meters and the long wave band ranges from 1000 to 2000 meters.

  Similar to the Philips 2540 built in Holland, and to the Philips 2522 which has British Mullard Vf 2 Volt valves .

• Net weight (2.2 lb = 1 kg)
• 21 kg / 46 lb 4.1 oz (46.256 lb)

• Literature/Schematics (1)
• - - Manufacturers Literature (Service manual dated 12/5/1930 (in Dutch))

• Author
• Model page created by Rodolfo Gaston Wenceslao Nasasta. See "Data change" for further contributors.

• Other Models

• Here you find 426 models, 302 with images and 285 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips Electrical, Lamps, Industrial - Miniwatt; London