• Country
• United States of America (USA)

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

• Year
• 1931 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 45274

• • alternative name: Jewell

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

• Power type and voltage
• Alternating Current supply (AC) / 110 Volt

• from Radiomuseum.org
• Model: Jewell Tubechecker Pattern 540 - Weston Electrical Instrument

• Notes

• Tube filament voltages: 1.5 - 2 - 2.5 - 3 - 3.3 - 5 - 6.3 - 7.5 V.
  Dry rectifier.
  Short-circuit test.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Mentioned in
• Guida Pratica del Radioriparatore E. Costa 3a edizione 1943

• Other Models

• Here you find 186 models, 161 with images and 98 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)