• Country
• United States of America (USA)

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

• Year
• 1955/1956

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 73975

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 7

• Semiconductors
• 2N168A 2N168A 2N168 2N169A 2N190 2N187 2N187

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 8 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Power out
• 0.5 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Royal 800 Ch= 7ZT41 [tan] - Zenith Radio Corp.; Chicago,

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 9.5 x 8 x 2.25 inch / 241 x 203 x 57 mm

• Notes
• The Zenith Royal 800 All Transistor model was released in December 1955.

• Net weight (2.2 lb = 1 kg)
• 1.8 kg / 3 lb 15.4 oz (3.965 lb)

• Price in first year of sale
• 90.00 $

• Mentioned in
• Zenith Transistor Radios

• Literature/Schematics (1)
• Transistor Radios 1954-68

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 351, Folder 21, Date 3-57)

• Author
• Model page created by Konrad Birkner † 12.08.2014. 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