• 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
• 43512

• • 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
• Wave Bands given in the notes.

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: CR3 Grebe Special [Type 1 ] - Grebe, A.H. & Co.; Richmond

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

• Notes
• The Grebe CR-3 (Grebe Special) Regenerative receiver covered 150-1000 Meters. This was the first version Type 1 of the CR-3 and used wooden variometers. The Type 2 CR-3 had bakelite variometers with vernier tuning.

• Price in first year of sale
• 60.00 $

• External source of data
• Ernst Erb

• Source of data
• Collector's Guide to Antique Radios 4. Edition

• 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)
• March, 1920 A. H. Grebe & Co. Bulletin R-121

• Other Models

• Here you find 188 models, 124 with images and 61 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)