• Country
• United States of America (USA)

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

• Year
• 1932

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 67453

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 12

• Valves / Tubes
• 58 58 56 58 56 56 57 57 59 59 59 80

• Main principle
• Superhet with RF-stage; ZF/IF 175 kHz

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 115/230 Volt

• Loudspeaker
• 2 Loudspeakers / Ø 12 inch = 30.5 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: 440 Ch= 2033 - Zenith Radio Corp.; Chicago,

• Shape
• Console, Lowboy (legs < 50 %).

• Dimensions (WHD)
• 29.25 x 45.4 x 18.5 inch / 743 x 1153 x 470 mm

• Notes

• Lowboy, stretcher base, "automatic tuning".  See also similar model 607A with other legs - or model 619 etc.

  The Zenith 440 uses two 12-inch Jensen D9 electrodynamic moving coil speakers, part numbers 49-50J and 49-51J. One speaker is tuned for resonance at 70Hz, the other at 90Hz.  Some radios have been found with the speakers flat-mounted side by side, others have been found with the speakers mounted at a 90 degree angle to each other.  Both arrangements are original from the factory.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 3 = 1933 and before

• 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