TR-4

• Country
• United States of America (USA)

• Manufacturer / Brand
• Regency (brand of I.D.E.A.)

• Year
• 1957

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 71786

• • alternative name: Idea (I.D.E.A.)

• Picture
• Schematics

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

• Number of Transistors
• 4

• Semiconductors
• 2N229 2N229 2N229 2N213

• 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. 

• Mentioned in
• The Collector's Guide To Antique Radios 2. Edition (page 160)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 381 Folder 11 dated 12-57)

• Literature/Schematics (2)
• Collector's Guide To TrR1 Bunis trans.94 (1996, page 230)

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

• Other Models

• Here you find 68 models, 60 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Regency (brand of I.D.E.A.)