• Country
• United States of America (USA)

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

• Year
• 1941 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 236144

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

• Number of Tubes
• 5

• Valves / Tubes
• 12A8GT 12K7GT 12Q7GT 35L6GT 35Z5GT

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / Either AC 50 to 60 cycles, 117 or DC 117 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: S7422-8 - Firestone Tire & Rubber Co.

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 12 x 7.25 x 6.75 inch / 305 x 184 x 171 mm

• Notes

• The Firestone S7422-8 is an AC/DC operated 5 tube BC band receiver. The BC band tuning range is 535 to 1720kHz. Has built-in loop antenna which is mounted on the side of the chassis. Uses lamp #47. 

  The catalog picture of the Firestone S7403-5 looks similar to model S7422-8 and the chassis layout is the same.  Thus the schematic and alignment information for model S7403-5 might be useful for model S7422-8, however no manufacturer data has yet been found to substantiate this. (S7403-5 information found in Riders Firestone 12-2).

• Author
• Model page created by Rodney Boleyn. See "Data change" for further contributors.

• Other Models

• Here you find 480 models, 313 with images and 438 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)