• Country
• United States of America (USA)

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

• Year
• 1954 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 81302

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 5

• Valves / Tubes
• 12BE6 12BA6 12AT6 50C5 35W4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 60 Hz, 117V = 110 -120 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: R521W Ch= 5R03 - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel with Clock ((Alarm-) Clock Radio).

• Notes

• Zenith model R521W is an AC operated AM superheterodyne receiver with electric clock.

   

• Source of data
• Beitman Radio Diagrams, Vol. 15, 1955

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 293; Folder 12; Date 10-1955)

• Author
• Model page created by Egon Penker. 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