• Year
  • 1957
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 71786
    • alternative name: Idea (I.D.E.A.)

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

 Technical Specifications

  • Number of Transistors
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Storage and/or dry batteries / 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: TR-4 - Regency brand of I.D.E.A.
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 3 x 5 x 1.25 inch / 76 x 127 x 32 mm
  • Notes
  • Regency model TR-4 is a battery operated portable AM transistorized receiver. In October 1954, Regency introduced the TR-1, the world's first commercial pocket transistor radio.  The TR-4, and also the TR-1G, were revival models of the original TR-1.  It was available in ebony, red, or ivory. 

  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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The model TR-4 is part of the collections of the following members.

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