• Country
• Great Britain (UK)

• Manufacturer / Brand
• Pye Ltd., Radio Works; Cambridge

• Year
• 1927/1928

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 77408

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

• Number of Tubes
• 5

• Valves / Tubes

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

• Tuned circuits
• 1 AM circuit(s)

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

• Power type and voltage
• Storage and/or dry batteries / 2 & 108 & 9 Volt

• Loudspeaker
• Magnetic loudspeaker (reed) generic.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Dual Portable 25A - Pye Ltd., Radio Works;

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

• Dimensions (WHD)
• 16 x 16 x 8 inch / 406 x 406 x 203 mm

• Notes

• Two HF valves with aperiodic interstage coupling, grid-leak detector, two transformer-coupled LF valves. Wave range 250-560 and 1000-2000 metres. Grid bias battery 9 volts.

  Enclosed frame aerial. Built-in cone loudspeaker. Available in mahogany or walnut. Leather carrying handle.

• Net weight (2.2 lb = 1 kg)
• 32 lb (32 lb 0 oz) / 14.528 kg

• Price in first year of sale
• 30.00 GBP

• Source of data
• Radio! Radio!

• Mentioned in
• Wireless World (The), London (WW, 79)

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

• Other Models

• Here you find 629 models, 485 with images and 342 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Pye Ltd., Radio Works; Cambridge