660 Pre-Amplifier
Operadio Corp.; St. Charles (IL)
- Country
- United States of America (USA)
- Manufacturer / Brand
- Operadio Corp.; St. Charles (IL)
- Year
- 1935 ?
- Category
- Audio Amplifier or -mixer
- Radiomuseum.org ID
- 214995
-
- alternative name: Operadio Mfg,
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 4
- Main principle
- Audio-Amplification
- Wave bands
- - without
- Power type and voltage
- Alternating Current supply (AC) / 115 Volt
- Loudspeaker
- - For headphones or amp.
- from Radiomuseum.org
- Model: 660 Pre-Amplifier - Operadio Corp.; St. Charles IL
- Circuit diagram reference
- Rider's Perpetual, Volume 8 = 1937 and before
- Mentioned in
- Rider's Misc. Page 8-6
- Author
- Model page created by Hans-Joachim Korn † 16.11.15. 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)