• Country
• United States of America (USA)

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

• Year
• 1923

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 67512

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 4

• Valves / Tubes
• UV201A UV201A UV201A UV201A

• Main principle
• TRF with regeneration; 3 AF stage(s)

• Tuned circuits
• 1 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: 4R Long Distance Receiver-Amplifier [late ] - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 21.7 x 9 x 10 inch / 551 x 229 x 254 mm

• Notes
• Has no porthole in the front panel. (The early version has it).

• Price in first year of sale
• 85.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Radio Manufacturers of the 1920's, Vol. 3

• Literature/Schematics (1)
• Zenith Radio The Early Years 1919-1935

• Literature/Schematics (2)
• Radio Broadcast, Jun. 1924, p. 185

• Literature/Schematics (3)
• Radio Craft (Dec. 1929, page 285, suggested mods: use 12A or 71A tube for V4, and a T3 with a turns ratio of 2:1)

• 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