• Country
• United States of America (USA)

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

• Year
• 1962

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 73991

• • 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; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 2 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2 inch = 5.1 cm

• Power out
• 0.25 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Royal 50YL Shirt Pocket Radio Ch= 6KT40Z1, 6KT40Z8 [charcoal/white] - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 2.7 x 4.6 x 1.3 inch / 69 x 117 x 33 mm

• Notes
• color: charcoal with white front. Recessed tuning knob.

• Net weight (2.2 lb = 1 kg)
• 0.260 kg / 0 lb 9.2 oz (0.573 lb)

• Price in first year of sale
• 20.00 $

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 24, 1964

• Literature/Schematics (1)
• Zenith Transistor Radios (p.43)

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