• Country
• United States of America (USA)

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

• Year
• 1960

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 68891

• • alternative name: Chicago Radio Lab

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

• Number of Transistors
• 8

• Semiconductors
• 121-64 121-73 121-65 121-74 121-62 121-78 121-61 121-61

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 6 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Power out
• 0.275 W (undistorted)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Royal 755 Ch= 8CT41Z2 - Zenith Radio Corp.; Chicago,

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

• Dimensions (WHD)
• 9 x 5.5 x 4 inch / 229 x 140 x 102 mm

• Notes
• Beitman doesnt mention a suffix to 755. That means it can apply to several models using this chassis. Chassis 8CT41 and 8CT41Z2 are virtually identical except different transistors and a few other parts.

• External source of data
• Konrad Birkner

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 20, 1960

• Mentioned in
• The Portable Radio in American Life

• 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