• Country
• United States of America (USA)

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

• Year
• 1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 67960

• • alternative name: Chicago Radio Lab

• Number of Tubes
• 6

• Valves / Tubes
• 6A8 6K7 6H6 6F5 25A6 25Z6

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz

• Wave bands
• Broadcast, Long Wave and 2 x Short Wave.

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

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet. / Ø 8 inch = 20.3 cm

• Power out
• 1.5 W (unknown quality)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 7DA138 Zephyr 7-DA-138 Ch=5708E - Zenith Radio Corp.; Chicago,

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Dimensions (WHD)
• 18 x 23 x 12.9 inch / 457 x 584 x 328 mm

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 10 = 1939 and before

• Mentioned in
• Zenith Radio The Glory Years 1936-1945

• 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