4 Transistor 400R Label code PR-1018

CBS-Columbia Inc.; New York, NY

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  • Year
  • 1959 ?
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 126968
    • 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 Transistors
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s); Reflex
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 1 x 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.25 inch = 5.7 cm
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: 4 Transistor 400R Label code PR-1018 - CBS-Columbia Inc.; New York,
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 2.5 x 4 x 1.25 inch / 64 x 102 x 32 mm
  • Notes

  • The Zephyr Transistor Z and the Transistor 4T models have non-vented backs, TRANSISTOR on the escutcheon, and a label code PR-793. The only difference between these two models is the round badge: Z or 4T. There is no model number on the models, so the badge is used for part of the model name.

    Later similar versions of the Columbia 4 Transistor 400B, 4 Transistor 400G, and
    4 Transistor 400R have vented backs (probably to correct a heating issue of the germanium transistors),  4 TRANSISTOR on the escutcheon, a label code PR-1018, and a round badge Columbia above a music note. 

    The base model number 400 listed on period ads, radio instructions, and Beitman's is generic only and represents all 400 models. Actual radios sold had a cabinet color letter, B (black), G (gray), or R (red) added to 400 and was only printed on the box, not on the radio.

    SAMS Photofact, date 11-60, set 507, folder 6 features the CBS Columbia models 400B, 400G, and 400R as the same schematic. The only difference is the three color cabinet P/Ns, as listed in the Parts List.

    The 2nd IF transistor is reflexed as the 1st AF stage.

    Made in Japan

  • Net weight (2.2 lb = 1 kg)
  • 0 lb 8 oz (0.5 lb) / 0.227 kg
  • Price in first year of sale
  • 29.95 USD
  • Circuit diagram reference
  • Beitman Radio Diagrams Vol. 20, 1960
  • Literature/Schematics (3)
  • -- Original prospect or advert (The Atchison [KS] Daily Globe, Oct. 4, 1959, page 7 ad "$29.95")
  • Literature/Schematics (4)
  • -- Original prospect or advert (The Akron Ohio Beacon Journal, Dec. 11, 1959, page 5 ad)
  • Author
  • Model page created by a member from A. See "Data change" for further contributors.

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