• Country
• United States of America (USA)

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

• Year
• 1920–1922

• Category
• Radio module post 1925 (not a part, not a key)

• Radiomuseum.org ID
• 182934

• • Brand: Radak

• 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
• Wooden case, TUBES VISIBLE.

• from Radiomuseum.org
• Model: Type Z.R.D. [Tube Control or Detector Panel] - Clapp-Eastham Co.; Cambridge,

• Shape
• Chassis only or for «building in»

• Dimensions (WHD)
• 114 x 133 x 120 mm / 4.5 x 5.2 x 4.7 inch

• Notes
• This detector comprises a front panel of 1/4 bakelite engraved and filled with white enamel on which is mounted a Z.R.R. Rheostat and three pair of binding posts. It is attached to the oak baseboard which holds the tube socket. The binding posts are positioned to line up with the Z.R.F. Regenerative Receiver (Tuner) and the Z.R.A One Stage Amplifier panel.

• Net weight (2.2 lb = 1 kg)
• 0.5 kg / 1 lb 1.6 oz (1.101 lb)

• Price in first year of sale
• 12.00 $

• Source of data
• - - Manufacturers Literature

• 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