• Country
• United States of America (USA)

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

• Year
• 1940 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 235055

• • alternative name: Jewell

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

• Wave bands
• - without

• Power type and voltage
• No Power needed

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: AC Voltmeter 433 - Weston Electrical Instrument

• Dimensions (WHD)
• 5.06 x 5.25 x 3.25 inch / 129 x 133 x 83 mm

• Notes

• AC Portable Voltmeter

  Movable Iron Meter Type calibrated for horizontal use.

  Hand calibrated mirror scale

  Bakelite case with carrying strap

  Triple range: 450 - 300 - 150VAC

  Frequency range: 25 to 125 Hz

  Scale lenght 4,04"

  Accuracy within 3/4 of 1%

  Also available in single-rage:  0 - 15VAC

  Weston often used the same model number for a complete series of meters.  Model 433 was available both as an AC ammeter and AC voltmeter. Each series covered individual meters with a variety of ranges.  For example the 433 voltmeter was available in double ranges as 15/30, 30/60, 75/150, 150/300 volts and, obvious from the example pictured, 5/10.  Apparently the model was also available in triple ranges. 

  The same was also true of the 433 ammeters with ranges of 1/2, 2.5/5, 5/10, and 10/20 as shown in the  technical info from the catalog appended to this page.  Thus the 433 "model number" was more a style and form factor with a specification for precision than an exacting model number for an individual meter.

• Net weight (2.2 lb = 1 kg)
• 2 lb 5 oz (2.312 lb) / 1.050 kg

• Price in first year of sale
• 103.75 1960

• Author
• Model page created by Dirson Willig. See "Data change" for further contributors.

• 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)