• Country
• United States of America (USA)

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

• Year
• 1950

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37745

• • Brand: Pierce Airo

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

• Number of Tubes
• 4

• Valves / Tubes
• 1R5 1T4 1U5 3V4

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast plus 2 Short Wave bands.

• Power type and voltage
• Line / Batteries (any type) / 105-125 or 220 / 90; 9 Volt

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

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

• from Radiomuseum.org
• Model: D-508 - DeWald Radio Mfg. Corp.,

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

• Dimensions (WHD)
• 320 x 240 x 150 mm / 12.6 x 9.4 x 5.9 inch

• Notes
• With Resistor cord 210-240 Volts. Up to now we believe that model D-508 and D-508A is the same - just a shorter writing. NOrmally in the plan you find D-508 and on the plate D-508A. On the schematic (D-508) the model(s) show BC 540-177 Kc, Band 1 16.7 to 5.3 Mc and Band 2 5.5 to 1.9 Mc. Please add your remarks if you come accross of any differenciation. Since there still may be found differences we leave the new model D-508A and don't delete it as a doublette.

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 21, Copyright 1950

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965 (Beitman Radio Diagrams 1950)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 9-50, Set 106, Folder 5)

• 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.