Radiomobile Control Unit 4220 Smith & Sons

Radiomobile Ltd., Cricklewood Works, London

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  • Year
  • 1959 ?
  • Category
  • Car Radio, perhaps also + sound player/recorder
  • Radiomuseum.org ID
  • 189119
    • alternative name: S.Smith and Sons

 Technical Specifications

  • Number of Tubes
  • 2
  • Main principle
  • Superhet with RF-stage
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage Battery for all (e.g. for car radios and amateur radios) / 12 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Radiomobile Control Unit 4220 Smith & Sons - Radiomobile Ltd., Cricklewood
  • Shape
  • Chassis only or for «building in»
  • Notes
  • Most probably this is very similar to 4222 for Jaguar Automobiles - see there for a schematic. That information for the 4222 comes from Sam's, where Smith&Sons is called the manufacturer. It uses a slightly different first Detector/Osc. valve. Emitron is a brand name used by Smith&Sons for export models to N & S America. Control unit only, requires seperate unit such as units B, D or E which provide last IF, Det, AF amp & PSU. Also this model 4220 was together with the E model IF & AF amplifier.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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