• Country
• United States of America (USA)

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

• Year
• 1928 ??

• Category
• Power supply/conditioner or battery or charger 

• Radiomuseum.org ID
• 43490

• • Brand: Synchrophase

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

• Power type and voltage
• Alternating Current supply (AC) / 115 Volt

• from Radiomuseum.org
• Model: 671B Socket Power Unit - Grebe, A.H. & Co.; Richmond

• External source of data
• Ernst Erb

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

• 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)