• Country
• United States of America (USA)

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

• Year
• 1951 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 40652

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

• Number of Tubes
• 5

• Valves / Tubes
• 12SA7GT 12SK7GT 12SQ7GT 50L6GT 35Z5GT

• 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
• Alternating Current supply (AC) / 60 Hz, 117V = 110 -120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3.5 inch = 8.9 cm

• Power out
• 0.8 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 4-A-92 Code 297-1-327 - Firestone Tire & Rubber Co.

• Shape
• Tablemodel with Clock ((Alarm-) Clock Radio).

• Dimensions (WHD)
• 11.1 x 5.1 x 5.1 inch / 282 x 130 x 130 mm

• Notes

• Firestone model 4-A-92 is an AC operated superheterodyne receiver with electric clock.

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 12, 1952

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965 (Rider's Perpetual, Volume 22)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 12-51, Set 154, Folder 4)

• 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)