• Country
• United States of America (USA)

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

• Year
• 1954

• Category
• Car Radio, perhaps also + sound player/recorder

• Radiomuseum.org ID
• 101542

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

• Number of Tubes
• 6

• Valves / Tubes
• 6BA6 6BE6 6BA6 6AV6 6AQ5 6X4

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 7 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage Battery for all (e.g. for car radios and amateur radios) / 6 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm

• Material
• Metal case

• from Radiomuseum.org
• Model: 4-B-75 Code 120-4-MU34 - Firestone Tire & Rubber Co.

• Shape
• Chassis only or for «building in»

• Notes
• The Firestone Model 4-B-75 is a Battery Operated 6 Tube Universal Automobile AM Superheterodyne Receiver.

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 2-55, Set 267, Folder 4)

• Author
• Model page created by Peter Hoddow. See "Data change" for further contributors.

• 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)