Royal 300Y Ch= 7AT42

Zenith Radio Corp.; Chicago, IL

  • Year
  • 1957
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 165855
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
  • Tuned circuits
  • 5 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Dry Batteries / 6 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm
  • Power out
  • 0.1 W (unknown quality)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Royal 300Y Ch= 7AT42 - Zenith Radio Corp.; Chicago,
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 149 x 91 x 39 mm / 5.9 x 3.6 x 1.5 inch
  • Notes
  • Color is ebony. The Zenith Model Royal 300Y is a Battery Operated Vertical Shirtpocket AM-Transistor.

    Made in USA.  Early models showed "Seven Transistors" on front faceplace, later changed to "All Transistor".  For this radio, Zenith departed from two knobs on the front (owl eyes) to dials on each side of the radio with a peep-circle to view the station dial.  Back cover has duck tail and two nubs for radio to lay on its back, not found on 500 models.  Civil Defense marks on station dial.

  • Net weight (2.2 lb = 1 kg)
  • 0.5 kg / 1 lb 1.6 oz (1.101 lb)
  • Price in first year of sale
  • 300.00 DM
  • Author
  • Model page created by Egon Penker. See "Data change" for further contributors.

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