• Country
• United States of America (USA)

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

• Year
• 1953/1954

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 68900

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 5

• Valves / Tubes
• 1U4 1L6 1U4 1U5 3V4 50A1

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

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

• Power type and voltage
• Line / Batteries (any type) / 9 & 90;117 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: Trans-Oceanic R-520/URR - Zenith Radio Corp.; Chicago,

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 430 x 280 x 200 mm / 16.9 x 11 x 7.9 inch

• Notes
• Full name: "Radio Receiver R-520/URR", military version of a highly modified H500. Covered with brown "oilcloth". See Bryant/Cones, The Zenith Trans-Oceanic, p.84 ff; http://antiqueradio.org/zen18.htm = good restoring details (H500 = basis for the R-520/URR (a rarity).

• Net weight (2.2 lb = 1 kg)
• 8 kg / 17 lb 9.9 oz (17.621 lb)

• Price in first year of sale
• 100.00 $

• Other Models

• Here you find 4491 models, 4096 with images and 3604 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL