• 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
• 72554

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 6

• Semiconductors

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 4,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.75 inch = 7 cm

• Power out
• 0.18 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Royal 100 Zenette Ch= 6ET42Z1, 6ET42Z2 - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 77 x 130 x 40 mm / 3 x 5.1 x 1.6 inch

• Notes
• Available in 5 colors (suffix):
  white (W),
  green (F),
  beige (L),
  yellow (P),
  charcoal (C).
  Chassis Z1 uses Texas Instruments Transistors,
  Chassis Z2 employs RCA Transistors.
  The name "Royal 100" is often found abbreviated as "R 100", e.g. in Sam's.

• Price in first year of sale
• 40.00 $

• Source of data
• -- Original-techn. papers.

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 21, 1961

• Mentioned in
• Zenith Transistor Radios (p.34, 92)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Folder 531 Set 16 (1961))

• Author
• Model page created by Arpad Roth † 27.3.17. 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