• Country
• United States of America (USA)

• Manufacturer / Brand
• Zenith Radio Corp.; Chicago, IL

• Year
• 1958

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 172193

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 8

• Semiconductors
• 121-63 or. 2N544 or. 121-78 121-62 or. 2N411 121-65 or. 2N409 121-66 or. 2N409 or. 121-73 121-66 or. 2N409 or. 121-74 121-64 or. 2N407 121-61 or. 2N407 121-61 or. 2N407

• Main principle
• Superhet with RF-stage; 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 / AA: 4 x 1.5 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: Royal 500YD Ch= 8AT40Z2 - Zenith Radio Corp.; Chicago,

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes

• See Zenith Royal 500RD for the 500D family details.

   

• Mentioned in
• Zenith Transistor Radios (pages 23-24.)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 422, Folder 17, Nov. 1958.)

• Literature/Schematics (2)
• -- Original-techn. papers. (Antique Radio Magazine n.61, June-July 2004, page 53 (Ita/Eng). Free at Aldo Andreani's website.)

• Literature/Schematics (3)
• -- Original-techn. papers. (Zenith Royal 500 Transistor Radios "Owl Eyes" booklet, Eldon A. Horton, pages 1-20.)

Radio a transistor tascabili americane: Zenith Royal 500 “Owl Eyes” (Per cortesia di L.Salvatore/ARM)

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• Documents regarding this model

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 4496 models, 4101 with images and 3615 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL