• 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
• 192223

• • Brand: Synchrophase

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

• Number of Tubes
• 1

• Valves / Tubes
• VT-Class-I or B_Moorhead-Shaw

• Main principle
• TRF with regeneration

• Wave bands
• Long Wave and/or Very Low Frequency (VLF).

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

• Loudspeaker
• - For headphones or amp.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Long Wave CR7 Type 1 [exposed tube and rheostat] - Grebe, A.H. & Co.; Richmond

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

• Notes
• The Grebe CR-7 Long Wave Regenerative Receiver covered the 500-20,000 meters wavelength range. This early version also lacks the Antennae Condenser switch found on the later versions.

• Price in first year of sale
• 210.00 $

• Mentioned in
• 1921 Mesco catalog page 116-117

• Literature/Schematics (2)
• The Wireless Experimenters Manual, 1920, E.E. Bucher, Page 251

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

• 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)