• Country
• United States of America (USA)

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

• Year
• 1920

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 43546

• • Brand: Synchrophase

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

• Number of Tubes
• 3

• Valves / Tubes
• UV200 UV201 UV201

• Main principle
• TRF with regeneration

• Tuned circuits
• 2 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Storage and/or dry batteries

• Loudspeaker
• - This model requires external speaker(s).

• Material
• Wooden case

• from Radiomuseum.org
• Model: CR-6 RadioPhone [Early wooden variometers] - Grebe, A.H. & Co.; Richmond

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

• Dimensions (WHD)
• 22 x 12.5 x 8 inch / 559 x 318 x 203 mm

• Notes

• Two dials (primary tuning control knobs)

  The first version of the CR-6 used clutch style tuning knobs, wooden variometers and no vernier tuning. The CR-6 circuit featured a regenerative tube detector, a complex, highly selective 3-circuit tuner and two stages of AF amplification.

  Wavelength range 170 to 600 meters

• Price in first year of sale
• 180.00 $

• External source of data
• Ernst Erb

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

• Mentioned in
• Radio Manufacturers of the 1920's, Vol. 2

• Other Models

• Here you find 190 models, 128 with images and 62 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)