Ultra Twin R825

Ultra Electric Ltd.; London

  • Year
  • 1957
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 127113
    • alternative name: Ultra Radio and Television

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 471 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • Line / Batteries (any type) / 200-214; 215-234; 235-250 / 7.5 & 85 V Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Material
  • Bakelite or Plastics (type unknown)
  • from Radiomuseum.org
  • Model: Ultra Twin R825 - Ultra Electric Ltd.; London
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 12 x 8.5 x 6.5 inch / 305 x 216 x 165 mm
  • Notes
  • AC/DC mains or battery. Westalite selenium rectifier.
  • Source of data
  • -- Schematic
  • Literature/Schematics (1)
  • Paul Stennings Vintage Radio Service Data Vol 4
  • Author
  • Model page created by Keith Staines. See "Data change" for further contributors.

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