• Country
• United States of America (USA)

• Manufacturer / Brand
• Clapp-Eastham Co.; Cambridge, MA

• Year
• 1920–1922

• Category
• Audio Amplifier or -mixer

• Radiomuseum.org ID
• 182929

• • Brand: Radak

• Number of Tubes
• 1

• Valves / Tubes
• UV201

• Main principle
• Audio-Amplification; 1 AF stage(s)

• Wave bands
• - without

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

• Loudspeaker
• - For headphones or amp.

• Material
• Bakelite, TUBES VISIBLE

• from Radiomuseum.org
• Model: One Stage Amplifier Panel Z.R.A. - Clapp-Eastham Co.; Cambridge,

• Shape
• Tablemodel, with any shape - general.

• Dimensions (WHD)
• 4 x 5 x 0 inch / 102 x 127 x 0 mm

• Notes
• One stage amplifier panel for use with the Z.R.F. regenerative receiver.

• Price in first year of sale
• 18.00 $

• Source of data
• - - Manufacturers Literature

• Literature/Schematics (4)
• September 1920 Everday Engineering magazine page 549

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

• Other Models

• Here you find 130 models, 107 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Clapp-Eastham Co.; Cambridge, MA