• Country
• United States of America (USA)

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

• Year
• 1946/1947

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 40622

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

• Number of Tubes
• 4

• Valves / Tubes
• 1A7GT 1N5GT 1H5GT 1A5GT

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries / 90 / 1,5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm

• Material
• Wooden case

• from Radiomuseum.org
• Model: 4-A-24 "Air Chief" Code 291-6-566 - Firestone Tire & Rubber Co.

• Shape
• Tablemodel, with any shape - general.

• Notes
• The Air Chief model 4-A-24 is a Battery Operated Superheterodyne Receiver.

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• Circuit diagram reference
• Rider's Perpetual, Volume 15 = 1947 and before

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date: Feb 1947, Set 13, Folder 473-5)

• 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)