• Country
• United States of America (USA)

• Manufacturer / Brand
• Radolek Co., Chicago

• Year
• 1933

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 52862

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 9

• Valves / Tubes
• 34 30 34 34 30 30 30 30 30

• Main principle
• Superheterodyne (common)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• from Radiomuseum.org
• Model: 9 Tube Battery Super SR227 - Radolek Co., Chicago

• Notes
• push pull af output stage.

• 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