• Country
• United States of America (USA)

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

• Year
• 1935 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 37460

• • Brand: Pierce Airo

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

• Number of Tubes
• 5

• Valves / Tubes
• 6A7 6D6 75 43 25Z5

• Main principle
• Superheterodyne (common); ZF/IF 456 kHz; 2 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• AC/DC-set / 110 Volt

• Loudspeaker
• Electro Magnetic Dynamic LS (moving-coil with field excitation coil) / Ø 12.6 cm = 5 inch

• Material
• Wooden case

• from Radiomuseum.org
• Model: 505 - DeWald Radio Mfg. Corp.,

• Shape
• Tablemodel, Tombstone = decorative upright, not cathedral but can have rounded edges.

• Dimensions (WHD)
• 310 x 400 x 190 mm / 12.2 x 15.7 x 7.5 inch

• Net weight (2.2 lb = 1 kg)
• 5.1 kg / 11 lb 3.7 oz (11.233 lb)

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 6 = 1935 and before

• 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.