• Year
  • 2008 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 207096

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

 Technical Specifications

  • Number of Transistors
  • 0
  • Main principle
  • Superhet with RF-stage
  • Wave bands
  • Broadcast, Long Wave and FM or UHF.
  • Power type and voltage
  • Line / Batteries (any type) / 230 / 4 x 1,5 (LR20) Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm
  • Power out
  • 0.8 W (1 W max.)
  • Material
  • Leather / canvas / plastic - over other material
  • from Radiomuseum.org
  • Model: Revival R250 - Roberts Radio Co.Ltd., East
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Dimensions (WHD)
  • 238 x 155 x 98 mm / 9.4 x 6.1 x 3.9 inch
  • Notes
  • Bemerkenswert ist, dass dieses Gerät - äußerlich im  Stil der 50er - keine diskreten Halbleiter aufweist. Die gesamte Empfängerschaltung ist mit 3 ICs realisiert:

    1. BA4424N: FM-Signalaufbereitung: HF-Vorverst., Oszillator und Mischer, ZF-Vorverstärker
    2. BA4236L: FM-ZF-Verstärker und Quadratur-Demodulator, AM-Oszillator, -Mischer und ZF-Verstärker, Demodulator und AGC.
    3. TDA7231: NF-Vorverstärker und Endstufe.

    This radio while reminiscent of the 1950s Roberts doesn't actually match any earlier model. The entire receiver circuit is realized with 3 ICs:

    1. BA4424N: FM Signal Processing: RF preamplifier, mixer and oscillator, IF preamplifier.
    2. BA4236L: FM IF amplifier and quadrature demodulator, AM oscillator, mixer and IF amplifier, demodulator and AGC.
    3. TDA7231: AF preamp and power amp.

    The loudspeaker is smaller than 1950s Roberts in a similar cabinet.

     

  • Net weight (2.2 lb = 1 kg)
  • 1.180 kg / 2 lb 9.6 oz (2.599 lb)
  • Price in first year of sale
  • 169.00 EUR
  • Source of data
  • - - Manufacturers Literature
  • Author
  • Model page created by Jean-noël Delizee. See "Data change" for further contributors.

 Collections | Museums | Literature

Collections

The model Revival (retro model) is part of the collections of the following members.

 Forum