• Country
• United States of America (USA)

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

• Year
• 1934 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37450

• • Brand: Pierce Airo

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

• Number of Tubes
• 4

• Valves / Tubes
• 6D6 6C6 43 12Z3

• Main principle
• TRF without regeneration; 1 AF stage(s)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil)

• Material
• Wooden case

• from Radiomuseum.org
• Model: 425-R - DeWald Radio Mfg. Corp.,

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• External source of data
• Ernst Erb

• Source of data
• Machine Age to Jet Age II

• Circuit diagram reference
• Rider's Perpetual, Volume 5 = ca. 1934 and before

• Other Models

• Here you find 445 models, 196 with images and 346 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.