• Country
• United States of America (USA)

• Manufacturer / Brand
• Weston Electrical Instrument Co.; Newark, N.J.; (Jewell Electrical Instrument Co.; Chicago, IL)

• Year
• 1935

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 66617

• • alternative name: Jewell

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

• from Radiomuseum.org
• Model: Tube Checker 770 - Weston Electrical Instrument

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 6 = 1935 and before

• Other Models

• Here you find 189 models, 164 with images and 101 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Weston Electrical Instrument Co.; Newark, N.J.; (Jewell Electrical Instrument Co.; Chicago, IL)