• Country
• United States of America (USA)

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

• Year
• 1952 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 40672

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1U4 1U5 3V4

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

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Line / Batteries (any type) / AC/DC 110-120/ 90 & 4.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Power out
• 0.18 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 4-C-19 "The Caravan" - Firestone Tire & Rubber Co.

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 10.7 x 4.2 x 6.4 inch / 272 x 107 x 163 mm

• Notes

• Firstone model 4-C-19 is a three power portable superheterodyne receiver. Selenium Rectifier Color=Maroon.

• Net weight (2.2 lb = 1 kg)
• 1.8 kg / 3 lb 15.4 oz (3.965 lb)

• 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 23 (last))

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 6-52, Set 170, Folder 7)

• Other Models

• Here you find 480 models, 313 with images and 439 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)