Supervox 498

McMichael Radio Ltd.; Slough

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  • Year
  • 1949
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 79310
    • alternative name: McMichael, Leslie

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

 Technical Specifications

  • Number of Tubes
  • 5
  • Main principle
  • Superheterodyne (common); ZF/IF 470 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast (MW) and Long Wave.
  • Power type and voltage
  • AC/DC-set / 190-250 Volt
  • Loudspeaker
  • 2 Loudspeakers
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Supervox 498 - McMichael Radio Ltd.; Slough
  • Shape
  • Tablemodel, with any shape - general.
  • Dimensions (WHD)
  • 17.25 x 8.25 x 7.5 inch / 438 x 210 x 191 mm
  • Notes

  • Described as a "Transportable", but looks like a table model (no handle), also no internal aerial (Transportable models of this era use Frame aerials). Requires external aerial.

    This is referred to as 498U in R&TVS 19851 edition (U = Universal Mains, i.e. AC/DC)

    The 6.3V 0.3A scale lamp/dial bulb is also intended to be the mains fuse, with spare lamps mounted in rubber grommets on the chassis.

    The 508 (or 508U) is the same circuit but physically a different layout, it has the controls at front instead of sides and the two speakers on the chassis.

    Wavebands

    1. LW 1000 ... 2000m
    2. MW 200 ... 550m

    The two speakers are simply in parallel.

    Warning
    "Live" chassis and Aerial / Earth isolation capacitors likely need replaced with 1kV safety types for operation.

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