• Country
• United States of America (USA)

• Manufacturer / Brand
• Zenith Radio Corp.; Chicago, IL

• Year
• 1961 ?

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 86948

• • alternative name: Chicago Radio Lab

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

• Number of Tubes
• 4

• Valves / Tubes
• 6CB6 12AX7A 12AU7 12AU7

• Main principle
• Audio-Amplification

• Power type and voltage
• Powered by external power supply or a main unit.

• from Radiomuseum.org
• Model: GV21 Ch= 4G24 - Zenith Radio Corp.; Chicago,

• Shape
• Chassis only or for «building in»

• Notes
• used in Modell GV21 (GV 21).

• Circuit diagram reference
• Beitman Radio Diagrams Vol. 22, 1962

• Author
• Model page created by Egon Penker. See "Data change" for further contributors.

• Other Models

• Here you find 4505 models, 4101 with images and 3631 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Zenith Radio Corp.; Chicago, IL