• Year
  • 1933/1934
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 19005
    • alternative name: Chicago Radio Lab

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

 Technical Specifications

  • Number of Tubes
  • 6
  • Main principle
  • Superheterodyne (common); ZF/IF 485 kHz; 2 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast only (MW).
  • Power type and voltage
  • Alternating Current supply (AC) / 117 Volt
  • Loudspeaker
  • Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5.5 inch = 14 cm
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: 705 Ch= 2052 - Zenith Radio Corp.; Chicago,
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 15.5 x 8.5 x 7.5 inch / 394 x 216 x 191 mm
  • Notes
  • The model 705 from Zenith Radio Corp. with chassis nr. 2052 comes with an elaborated inlaid wood case, called by Zenith "the challenger series". The 705 is small and therefore also called mantle type radio.
  • Net weight (2.2 lb = 1 kg)
  • 3.8 kg / 8 lb 5.9 oz (8.37 lb)
  • Price in first year of sale
  • 32.95 USD
  • External source of data
  • E. Erb 3-907007-36-0
  • Circuit diagram reference
  • Rider's Perpetual, Volume 4 = ca. 1934 and before
  • Literature/Schematics (2)
  • -- Original prospect or advert (Chicago Tribune (newspaper), 1 Dec, 1933)

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