• Country
• United States of America (USA)

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

• Year
• 1922

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

• Radiomuseum.org ID
• 199375

• • 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

• from Radiomuseum.org
• Model: Tube Control Panel Type HRD - Clapp-Eastham Co.; Cambridge,

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 4.75 x 5.5 x 0 inch / 121 x 140 x 0 mm

• Notes
• The Clapp-Eastham Type HRD Vacuum Tube Control Detector Panel was designed as an accessory or the Type HRF Regenerative Receiver. The terminals on the Detector panel line up with the terminals on the HRF Regenerative Receiver and also the Type HRA one-Stage Amplifier.

• Price in first year of sale
• 11.00 $

• Literature/Schematics (1)
• - - Manufacturers Literature (1922 Clapp-Eastham Bulletin FZ page 7)

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

• Other Models

• Here you find 131 models, 108 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