• Country
• United States of America (USA)

• Manufacturer / Brand
• Simpson Electric Co.; Chicago, IL - Lac du Flambeau, WI

• Year
• 1969

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 225677

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

• Wave bands
• - without

• Power type and voltage
• Dry Batteries / 1x 1.5 & 4x 1.5 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Volt-Ohm-Milliammeter 260 Series 5M - Simpson Electric Co.; Chicago,

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 5.25 x 7 x 3.125 inch / 133 x 178 x 79 mm

• Notes

• Difference between Series 4M and Series 5M: the meter of 5M has Taut Band Suspension.

  Pin type test leads. Adapter lock for use with "Add-A-Tester" accessories.

  Batteries: 1x "D" cell, 4x "AA" type behind the devices' back cover.

  Measuring ranges

  DC Volt: Ranges 250mV, 1V, 2.5V, 10V, 50V, 250V, 500V, 1000V; Accuracy 2% of full scale; Sensitivity 20K ohms per volt
  AC Volt: Ranges 2.5V, 10V, 25V, 50V, 250V, 500V, 1000V; Accuracy 3% of full scale; Sensitivity 5K ohms per volt
  dB: 5 Ranges -20 to +50dB; Reference 0dB=1mW into 600 ohms
  DC Ampere: Ranges 50μA, 1mA, 10mA, 500mA, 10A; Accuracy 1.5% of full scale (50µA), 2.0% of full scale (other); voltage drop between 250mV (50µA) and 500mV (500mA)
  Ohms: Ranges Rx 1, Rx 100, Rx 10K; Accuracy 2.5° of arc (Rx1), 2.0° of arc (other)

• Net weight (2.2 lb = 1 kg)
• 3 lb 0 oz (3 lb) / 1.362 kg

• Source of data
• - - Manufacturers Literature

• Other Models

• Here you find 148 models, 131 with images and 60 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Simpson Electric Co.; Chicago, IL - Lac du Flambeau, WI