• Year
  • 1952/1953
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 88011
    • alternative name: CBS Electronics || Columbia Phonographs || Columbia Records

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 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Line / Batteries (any type) / 110-120 AC/DC / 67,5 & 7,5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
  • Material
  • Bakelite or Plastics (type unknown)
  • from Radiomuseum.org
  • Model: 525 - CBS-Columbia Inc.; New York,
  • Shape
  • Portable set > 8 inch (also usable without mains)
  • Notes
  • The CBS-Columbia models 525 and 526 share the same schematic (Photofact Date 11-53, set 222, folder 4 and Beitman diagram). They are three power portable AM superheterodyne receivers with built in loop antenna and selenium rectifier.
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 13, 1953

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