• Country
• United States of America (USA)

• Manufacturer / Brand
• Keithley Instruments Inc.; Cleveland (OH)

• Year
• 1951

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 337314

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

• Number of Tubes
• 1

• Valves / Tubes

• Wave bands
• - without

• Power type and voltage
• Dry Batteries / 3 x 15, D: 1 x 1.5, AA: 7 x 1.5 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Vacuum Tube Electrometer 200 - Keithley Instruments Inc.;

• Shape
• Portable set > 8 inch (also usable without mains)

• Dimensions (WHD)
• 5 x 8 x 3.75 inch / 127 x 203 x 95 mm

• Notes

• The Keithley model 200 electrometer is a battery-operated very high input resistance DC vacuum tube voltmeter with two ranges, 2 volts and 20 volts.  Calibration potentiometers for the two ranges are on the rear of the unit. Input resistance is greater than 10 e14 ohms and capacitance approximately 6 pF.  Accuracy is within 2% of full scale.

• Mentioned in
• Electronics (June and July 1951)

• Author
• Model page created by Rich Post. See "Data change" for further contributors.

• Other Models

• Here you find 38 models, 33 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Keithley Instruments Inc.; Cleveland (OH)