• Country
• United States of America (USA)

• Manufacturer / Brand
• Keystone Radio Co.

• Year
• 1921

• Category
• Radio module pre 1926 (not a part, not a key)

• Radiomuseum.org ID
• 230605

• • Brand: Wondertone

• Number of Tubes
• 1

• Valves / Tubes
• UV200

• Main principle
• Detector with Vacuum Tube (Valve), no tuner

• Wave bands
• - without

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

• Loudspeaker
• - For headphones or amp.

• Material
• Various materials

• from Radiomuseum.org
• Model: Audion Control Panel - Keystone Radio Co.

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 4 x 6.5 x 0 inch / 102 x 165 x 0 mm

• Price in first year of sale
• 6.25 USD

• Literature/Schematics (1)
• February 1921 Pacific Radio News magazine advertisement page 233

• Author
• Model page created by Alan Larsen. See "Data change" for further contributors.

• Other Models

• Here you find 7 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Keystone Radio Co.