• Country
• United States of America (USA)

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

• Year
• 1959

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 268052

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 7

• Semiconductors
• 121-19 121-19 121-50 121-51 121-52 121-53 121-54

• 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 / AA : 6 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm

• Power out
• 0.25 W (0.45 W max.)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Royal 450V 7AT45Z1 - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 170 x 110 x 50 mm / 6.7 x 4.3 x 2 inch

• Notes

• The Zenith Royal 450V is a battery operated 7 transistor portable BC band receiver.  The BC band frequency tuning range is 540 - 1600kHz.  Has push-pull output stage and a earphone jack that disconnects the speaker for private listening.  Uses Qty(6) AA 1.5V penlight batteries.

  The Royal 450 was available with 3 different cabinet colors:

  Model	Cabinet Colors
  Royal 450Y	Black
  Royal 450V	Red
  Royal 450W	White

   

  Cross reference for the Zenith numbers in the same order :

  2N408, 2N408, 2N253, 2N254, R-120, 2N406, 2N252

  Diagram with for Zenith unusual typing error :

  This appaatus (sic) is licensed under the United States patent rights of Hazeltine Research, Inc.

• Net weight (2.2 lb = 1 kg)
• 0.825 kg / 1 lb 13.1 oz (1.817 lb)

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 19, 1959 (Page 185)

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 412, folder 16 dated 9-58)

• Literature/Schematics (3)
• - - Manufacturers Literature (Zenith Service Manual Model "Royal 450" All Transistor Portable Radio)

• Author
• Model page created by John Kusching. See "Data change" for further contributors.

• Other Models

• Here you find 4505 models, 4101 with images and 3631 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL