• Country
• United States of America (USA)

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

• Year
• 1938/1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 67718

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A8G 6K7G 6Q7G 25L6G 25Z6G

• Number of Transistors

• Semiconductors
• 100-70

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 115 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 5 inch = 12.7 cm

• Material
• Bakelite case

• from Radiomuseum.org
• Model: 6D-312 Ch=5647 [brown bakelite] - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel with Push Buttons.

• Dimensions (WHD)
• 12.5 x 7.8 x 6.4 inch / 318 x 198 x 163 mm

• Notes

• Budlong design. Brown bakelite. Same model in Ivory finish: model 6D-312W. Also available for AC operation Zenith model 5R312.

  Unknown ballast tube.

• Price in first year of sale
• 20.00 $

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 9 = 1938 and before

• Mentioned in
• Collector's Guide to Antique Radios 4. Edition

• Literature/Schematics (1)
• Zenith Radio The Glory Years 1936-1945

• Literature/Schematics (2)
• Table Top Radios Vol. 1 Stein 98 (page 170.)

• Literature/Schematics (3)
• -- Original prospect or advert (The Zenith Folder for 1939.)

• Other Models

• Here you find 4494 models, 4099 with images and 3605 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL