- Country
- United States of America (USA)
- Manufacturer / Brand
- DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Year
- 1937 ?
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 37478
-
- Brand: Pierce Airo
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 4
- Number of Transistors
- Semiconductors
- M55F
- 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 / 105-125 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: 528 - DeWald Radio Mfg. Corp.,
- Shape
- Tablemodel without push buttons, Mantel/Midget/Compact up to 14
- Dimensions (WHD)
- 10.625 x 7.75 x 6.125 inch / 270 x 197 x 156 mm
- Notes
- The model DeWald 528 was made in two versions: A model 528 with braodsast only and a model 528LW with braodcast and long waves. See schematic and notes there. The M55F (M-55-F) is a ballast tube to compensate the voltage difference which use the pilot lamp and the 4 tubes in series which end up by only about 70 volts. The 25Z5 is used as a single way rectifier only.
- Net weight (2.2 lb = 1 kg)
- 5.1 lb (5 lb 1.6 oz) / 2.315 kg
- External source of data
- Ernst Erb
- Circuit diagram reference
- Rider's Perpetual, Volume 8 = 1937 and before
- 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.
Collections
The model 528 is part of the collections of the following members.
Forum contributions about this model: DeWald Radio Mfg.: 528
Threads: 1 | Posts: 2
I have this radio in my collection. The label on the back clearly states model 528, it is a small tabletop in a wooden cabinet & is 10 5/8 inches wide by 7 3/4 inches high by 6 1/8 inches tall. There is also a ballast tube in the set & it's P/N is M-55-F. In addition, it does weigh in at slightly over 5 pounds.
My set has a permanent maganet speaker & it does look like it is original !!
Marvin J. Glassman, 18.Jul.09