• Country
• United States of America (USA)

• Manufacturer / Brand
• Grebe, A.H. & Co.; Richmond Hill (NY)

• Year
• 1920

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

• Radiomuseum.org ID
• 43511

• • Brand: Synchrophase

Click on the schematic thumbnail to request the schematic as a free document.

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

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: CR2 - Grebe, A.H. & Co.; Richmond

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

• Dimensions (WHD)
• 16.75 x 7 x 7.5 inch / 425 x 178 x 191 mm

• Notes

• Short-Wave Regenerative Receiver Type CR-2. Wave-length range 170 to 580/600 meters.

  The unit as such is not a complete Regenerative Receiver! To employ regeneration it requires a vacuum tube unit, e.g.Type RORH, this may be used to advantage with the CR-2, as their terminals correspond and permit the use of straight, short, bus connections. 

• Net weight (2.2 lb = 1 kg)
• 11 lb (11 lb 0 oz) / 4.994 kg

• Price in first year of sale
• 46.00 $

• External source of data
• Ernst Erb

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

• Circuit diagram reference
• Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

• Mentioned in
• The Radio Collector's Directory and Price Guide 1921 - 1965

• Literature/Schematics (1)
• Radio Manufacturers of the 1920's, Vol. 2

• Literature/Schematics (4)
• February, 1920 A. H. Grebe & Co. Bulletin R-102

• Other Models

• Here you find 188 models, 124 with images and 60 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Grebe, A.H. & Co.; Richmond Hill (NY)