• Country
• United States of America (USA)

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

• Year
• 1936

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 282799

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 7

• Valves / Tubes
• 6K7 6A8 6K7 6H6 6K7 6F6 5Y3

• Main principle
• Superhet with RF-stage; Export model

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast, Long Wave and 2 x Short Wave.

• Power type and voltage
• Alternating Current supply (AC) / 25 to 133 Hz, 110; 125; 150; 200; 220; 250 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 7A28A Ch= 5705A - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Dimensions (WHD)
• 16.3 x 22 x 13 inch / 414 x 559 x 330 mm

• Notes

• The Zenith 7A28A is the export version of the Zenith 7S28.

  It includes the Long Wave band, making it a 4-band model.

• Author
• Model page created by Rodney Boleyn. 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