• 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
• 19024

• • 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; ZF/IF 456 kHz

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

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

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: 7S28 Ch= 5704 - 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 cabinet from model 7S28 is similar to models 7S28A, 7A28A, and 7S28(Y) ebony.

  See also the export version for Switzerland with Long Wave Band and Short Wave in two bands, Broadcasting scale showing more than 80 written Stations.

• Price in first year of sale
• 75.00 $

• External source of data
• E. Erb 3-907007-36-0

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 7 = 1936 and before

• Mentioned in
• Machine Age to Jet Age II (page 317.)

• Literature/Schematics (1)
• Cathedral & Tombstone Radios (page 279.)

• 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