- Country
- United States of America (USA)
- Manufacturer / Brand
- DeWald Radio Mfg. Corp., Pierce Airo Inc.
- Year
- 1939
![perfect model](/img/sternRot.gif)
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 37458
-
- Brand: Pierce Airo
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 5
- Main principle
- Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)
- Tuned circuits
- 6 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- AC/DC-set / 105-125 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: 501A Harp - DeWald Radio Mfg. Corp.,
- Shape
- Design Radio or Novelty / Gadget - fancy or unusual shape.
- Dimensions (WHD)
- 9.75 x 6.5 x 5.6 inch / 248 x 165 x 142 mm
- Notes
-
DeWald on the case, but not on the dial.
Built-in loop as first RF circuit. Date see tube list, can not be earlier than 1939.
- Net weight (2.2 lb = 1 kg)
- 2.5 kg / 5 lb 8.1 oz (5.507 lb)
- External source of data
- Ernst Erb
- Source of data
- The Radio Collector's Directory and Price Guide 1921 - 1965
- Circuit diagram reference
- Rider's Perpetual, Volume 12 = ca. 1941 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.
Collections
The model 501A is part of the collections of the following members.