- Country
- United States of America (USA)
- Manufacturer / Brand
- DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Year
- 1938 ?
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 37633
-
- Brand: Pierce Airo
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 5
- Number of Transistors
- Semiconductors
- M49B
- Main principle
- Superheterodyne (common); ZF/IF 456 kHz; 2 AF stage(s)
- Tuned circuits
- 6 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)
- Material
- Wooden case
- from Radiomuseum.org
- Model: 633 - DeWald Radio Mfg. Corp.,
- Shape
- Tablemodel without push buttons, Mantel/Midget/Compact up to 14
- Dimensions (WHD)
- 340 x 220 x 170 mm / 13.4 x 8.7 x 6.7 inch
- Notes
-
Ballast Tube M49B.If the tube 25L6GT is the original tube, then year 1938 is the earliest possible, but if the first tube was a 25L6 then 1936 is possible. The tube here would have to be changed to 25L6 (or for 1937 to 25L6G).
- Net weight (2.2 lb = 1 kg)
- 3.5 kg / 7 lb 11.3 oz (7.709 lb)
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 8 = 1937 and before
- Literature/Schematics (1)
- Ballast Tube Handbook, The
- 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.