• Country
• United States of America (USA)

• Manufacturer / Brand
• Challenger Amplifier Co. (Bogen); New York, NY / Paramus, NJ

• Year
• 1956

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 236887

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

• Number of Tubes
• 5

• Valves / Tubes
• 12AX7 12AX7 6V6GT 6V6GT 6AX5GT

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 117 Volt

• Loudspeaker
• - This model requires external speaker(s).

• Power out
• 20 W (undistorted)

• Material
• Metal case

• from Radiomuseum.org
• Model: CHA-20 - Challenger Amplifier Co. Bogen

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 14.125 x 8.5 x 6.5 inch / 359 x 216 x 165 mm

• Notes

• 2 channel PA amplifier.

• Mentioned in
• 1961 Radio Shack Retail Catalog page 110

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (4-58, Set 394, Folder 5)

• Author
• Model page created by Tom Seeger. See "Data change" for further contributors.

• Other Models

• Here you find 47 models, 43 with images and 35 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Challenger Amplifier Co. (Bogen); New York, NY / Paramus, NJ