• Country
• United States of America (USA)

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

• Year
• 1951 ?

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

• Radiomuseum.org ID
• 40665

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

• Number of Tubes
• 6

• Valves / Tubes
• 6BA6 6BE6 6BA6 6AT6 or 6AV6 6AQ5 6X4

• Main principle
• Superhet with RF-stage; 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 5.25 inch = 13.3 cm

• Power out
• 2 W (unknown quality)

• Material
• Metal case

• from Radiomuseum.org
• Model: 4-B-61 1951 Chevrolet - Firestone Tire & Rubber Co.

• Shape
• Chassis only or for «building in»

• Notes

• Firestone model 4-B-61 is a battery operated custom built 1951 Chevrolet ,   superheterodyne receiver. Vibrator for +B.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 11, 1951

• Mentioned in
• Rider's Perpetual, Volume 23 (last) = covering up to 1954

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 1-52, Set 155, Folder 6)

• Other Models

• Here you find 473 models, 310 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)