• Country
• United States of America (USA)

• Manufacturer / Brand
• Firestone Tire & Rubber Co. (Air Chief & Roamer, Airchief); Akron (OH)

• Year
• 1936/1937

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 40688

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

• Number of Tubes
• 4

• Valves / Tubes
• 6D6 6C6 43 25Z5

• Main principle
• TRF without regeneration; Anode bend detection

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 110-130 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet. / Ø 5 inch = 12.7 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: 7405-1 Air Chief - Firestone Tire & Rubber Co.

• Shape
• Tablemodel, low profile (big size).

• Notes
• Firestone began selling non-automobile radios in the Fall 1936. These radios were normally manufactured by Stewart Warner. The model 7405-1 (4 tubes) is the smallest of the family for 1936/37, followed by 7405-2 (5 tubes) and 7405-3 (7 tubes) in size. The model 7405-1 has a 3-color illuminated dial, built-in antenna. Two knobs, propeller scale. Price was 13.95 $.

• Price in first year of sale
• 14.00 $

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 8 = 1937 and before

• Literature/Schematics (1)
• Riders 8-1

• Other Models

• Here you find 472 models, 307 with images and 430 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Firestone Tire & Rubber Co. (Air Chief & Roamer, Airchief); Akron (OH)