Battery Model 233

Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC

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  • Year
  • 1947/1948
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 97783
    • alternative name: CMC Canada || Marconi, Canada

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

 Technical Specifications

  • Number of Tubes
  • 7
  • Main principle
  • Superhet with RF-stage; ZF/IF 462.5 kHz; 2 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast plus 2 Short Wave bands.
  • Power type and voltage
  • Dry Batteries / 1.5 & 2 x 45 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm
  • Power out
  • 0.5 W (unknown quality)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Battery Model 233 - Canadian Marconi Co. Ltd. CMC,
  • Shape
  • Tablemodel, low profile (big size).
  • Notes
  • The Marconi Model 233 is a battery operated 7 Tube BC/SW Receiver.
    BC Band Tuning Range: 540 to 1720kHz.
    SW1 (Day)Band Tuning Range: 5.9 to 10.2MHz.
    SW2 (Night)Band Tuning Range: 10.2 to 18.2MHz.
    The two output tubes in the last audio stage are connected in parallel. Has Economizer switch to save battery power, which reduces output from 0.5 to 0.25 watts by disconnecting one of the two output tubes. Marconi Model 270 uses the same chassis and schematic.
  • Circuit diagram reference
  • Radio College of Canada
  • Literature/Schematics (1)
  • -- Original-techn. papers.
  • Author
  • Model page created by Pius Steiner. See "Data change" for further contributors.

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