• Country
• United States of America (USA)

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

• Year
• 1950 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 40645

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

• Number of Tubes
• 6

• Valves / Tubes
• 12AU6 6C4 12BA6 12AV6 50C5 35W4

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 117V = 110 -120 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 4-A-85 Code 297- 0-3123 - Firestone Tire & Rubber Co.

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

• Dimensions (WHD)
• 10.6 x 5.8 x 7.1 inch / 269 x 147 x 180 mm

• Notes

• Firestone model 4-A-85 is an AC-DC operated superheterodyne receiver withe loop antenna. Color; Walnut.

   

• Net weight (2.2 lb = 1 kg)
• 3.4 kg / 7 lb 7.8 oz (7.489 lb)

• External source of data
• Ernst Erb

• Source of data
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Circuit diagram reference
• Rider's Perpetual, Volume 21, Copyright 1950

• Literature/Schematics (1)
• Beitman Radio Diagrams, Vol. 11, 1951

• Literature/Schematics (2)
• Photofact Folder, Howard W. SAMS (Set 118, Folder 7 dated 12-50)

• Other Models

• Here you find 472 models, 308 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)