• Country
• United States of America (USA)

• Manufacturer / Brand
• DeWald Radio Mfg. Corp., Pierce Airo Inc.

• Year
• 1947

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37725

• • Brand: Pierce Airo

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

• Number of Tubes
• 5

• Valves / Tubes
• 1R5 1T4 1S5 3V4 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
• Line / Batteries (any type) / 110-117;9;90 Volt

• Loudspeaker
• -Loudspeaker incorporated, but system not known.

• Material
• Leather / canvas / plastic - over other material

• from Radiomuseum.org
• Model: A507 - DeWald Radio Mfg. Corp.,

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

• Notes
• Built-in loop antenna as first RF circuit.

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios (6th edition)

• Circuit diagram reference
• Rider's Perpetual, Volume 16 = ca. 1948 and before

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

• Literature/Schematics (4)
• Photofact Folder, Howard W. SAMS (Set 26, Date 10/47, Folder 4716-10)

• Other Models

• Here you find 442 models, 195 with images and 343 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from DeWald Radio Mfg. Corp., Pierce Airo Inc.