• Country
• Great Britain (UK)

• Manufacturer / Brand
• McMichael Radio Ltd.; Slough

• 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.

• Number of Tubes
• 5

• Valves / Tubes
• UCH42 UF41 UBC41 UL41 UY41

• 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.

• Source of data
• Radio! Radio!

• Literature/Schematics (1)
• Radio And Television Servicing books (R&TVS) (1951 ed. Vol1 p.242)

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

• Other Models

• Here you find 183 models, 123 with images and 120 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from McMichael Radio Ltd.; Slough