• Country
• United States of America (USA)

• Manufacturer / Brand
• 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.

• Number of Transistors
• 7

• Semiconductors
• 2N194 2N193 2N516 2N516 2N35 2N35 2N35

• 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

• Mentioned in
• Zenith Transistor Radios

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 5-59, Set 443, Folder 19)

• 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