• Country
• United States of America (USA)

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

• Year
• 1939

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 40725

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

• Number of Tubes
• 6

• Valves / Tubes
• 12SK7 12SA7 12SK7 12SQ7 35L6GT 35Z5GT

• Main principle
• Superhet with RF-stage; ZF/IF 456 kHz

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 117 Volt

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

• Material
• Wooden case

• from Radiomuseum.org
• Model: S7398-1 "Beaumont" - Firestone Tire & Rubber Co.

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 325 x 198 x 180 mm / 12.8 x 7.8 x 7.1 inch

• Notes
• Built in loop antenna.

• Net weight (2.2 lb = 1 kg)
• 3.3 kg / 7 lb 4.3 oz (7.269 lb)

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 13 = 1942 and before

• Literature/Schematics (1)
• Riders 13-14

• Other Models

• Here you find 479 models, 312 with images and 436 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)