• Year
  • 1954/1955
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 90385
    • Brand: Coronado

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

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 460 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 67,5 & 1,5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.5 inch = 6.4 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Coronado RA42-9850A - Gamble-Skogmo, Inc.;
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes
  • The Coronado RA42-9850A made by Gamble-Skogmo, Inc. is a battery operated portable AM superheterodyne receiver. Two 1.5 batteries have to be connected in parallel for the heaters.
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 14, 1954

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