• Country
• United States of America (USA)

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

• Year
• 1948

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 149874

• • Brand: Pierce Airo

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

• Number of Tubes
• 4

• Valves / Tubes
• 12BA6 12AT6 50B5 35W4

• Main principle
• TRF (Tuned-Radio-Frequency but use of regeneration unknown)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110 - 120 Volt

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

• Material
• Catalin (a brand name for a thermosetting polymer popular in the 1930s and 1940s - a phenol formaldehyde resin - like Bakelite, but a two-stage process with a lot of work afterwards).

• from Radiomuseum.org
• Model: B-403 Harp - DeWald Radio Mfg. Corp.,

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

• Notes
• The DeWald Model B-403 is an AC operated TRF Receiver with Electric Clock.
  Colors: ivory, maroon or brown.

• Source of data
• Table Top Radios Vol. 4 Stein 2003

• Mentioned in
• Plastic Radios - The Antique Radio Collectors' Source Book

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Date 12-48, Set 52, Folder 7)

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 442 models, 195 with images and 344 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.