• 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
• 35309

• • Brand: Radak

• Main principle
• Tuner pre 1926 (not a wave trap)

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Regenerative Receiver HRF - Clapp-Eastham Co.; Cambridge,

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

• Dimensions (WHD)
• 14.75 x 5.25 x 0 inch / 375 x 133 x 0 mm

• Notes
• The Clapp-Eastham Type HRF Regenerative Receiver covered the 175-600 meters wave length range. This was a typical three circuit tuner of the early 1920's employing a Grid Variometer, Plate Variometer and a Variocoupler in the antenna circuit. This set was designed to use the Clapp-Eastham Type HRD Detector panel as a detector.

• Price in first year of sale
• 38.00 $

• External source of data
• Ernst Erb

• Source of data
• Radio Collector`s Guide 1921-1932

• Mentioned in
• Radio Manufacturers of the 1920s, Vol 1

• Literature/Schematics (4)
• - - Manufacturers Literature (1922 Clapp-Eastham Bulletin FZ page 6)

• 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