• Country
• United States of America (USA)

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

• Year
• 1940

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 67300

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 11

• Valves / Tubes
• 1232 6A8G 6K7G 6J5G 6U5 6F5G 6J5G 6V6G 6V6G 6X5G 6X5G

• Main principle
• Superhet with RF-stage; ZF/IF 455 kHz

• Wave bands
• Broadcast, Short Wave(s) and Police.

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12 inch = 30.5 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: 11S474 11-S-474 Ch=1103 - Zenith Radio Corp.; Chicago,

• Shape
• Console with Push Buttons.

• Dimensions (WHD)
• 29.1 x 43.1 x 16.1 inch / 739 x 1095 x 409 mm

• Notes

• Member John Goller has reported an error in the Zenith schematics for Chassis 5808 covering models 8S443, 8S451, and 8S463.  The same error is found in Chassis 1005 covering models 10S443, 10S452, 10S464, 10S470, 10S491, and 10S492, and in Chassis 1103 for model 11S474.

  This error is in the Wavemagnet Antenna circuit. The Wavemagnet antenna for the above model does not have a "Wavemagnet or External" antenna switch on the antenna.  It does have a Local Distance switch which grounds a 10K resistor to the cathode of the 1232 RF amp tube for distance position.  The other leads from the Wavemagnet to into the radio chassis also have errors.  These errors appear to have originated in the Zenith Service Manuals and have been carried forward in the Riders and Beitman schematics.

  John Goller has prepared a revised schematic that shows the correct Wavemagnet Antenna circuit wiring along with the correct antenna plug pin connections.  This schematic is included in the model file.

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 11 = ca. 1940 and before

• Mentioned in
• Collector's Guide to Antique Radios 4. Edition

• Literature/Schematics (1)
• Zenith Radio The Glory Years 1936-1945

• Literature/Schematics (2)
• Pre-War Consoles

• Other Models

• Here you find 4491 models, 4096 with images and 3595 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL