Marvelo 7 Tube Super SR228
Radolek Co., Chicago
- Country
- United States of America (USA)
- Manufacturer / Brand
- Radolek Co., Chicago
- Year
- 1932
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 52868
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 7
- Main principle
- Superhet with RF-stage
- Tuned circuits
- 7 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Alternating Current supply (AC) / 110 Volt
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- from Radiomuseum.org
- Model: Marvelo 7 Tube Super SR228 - Radolek Co., Chicago
- Circuit diagram reference
- Rider's Perpetual, Volume 3 = 1933 and before
- Author
- Model page created by Peter Rutishauser. See "Data change" for further contributors.
- Other Models
-
Here you find 236 models, 118 with images and 63 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Radolek Co., Chicago