- Country
- United States of America (USA)
- Manufacturer / Brand
- Operadio Corp.; St. Charles (IL)
- Year
- 1950 ?
- Category
- Miscellaneous (Other, Various) - see notes
- Radiomuseum.org ID
- 311707
-
- alternative name: Operadio Mfg,
Picture from schematic.
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 3
- Main principle
- Audio-Amplification
- Wave bands
- - without
- Power type and voltage
- Alternating Current supply (AC) / 110 -120 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
- Material
- Bakelite or Plastics (type unknown)
- from Radiomuseum.org
- Model: 4A25-E - Operadio Corp.; St. Charles IL
- Shape
- Tablemodel without push buttons, Mantel/Midget/Compact up to 14
- Notes
-
AC operated intercommunication system.
- Literature/Schematics (1)
- Photofact Folder, Howard W. SAMS (Set 101, Folder 8, dated 7-50)
- Author
- Model page created by David Erali. See "Data change" for further contributors.
- Other Models
-
Here you find 66 models, 43 with images and 32 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Operadio Corp.; St. Charles (IL)