• Country
• United States of America (USA)

• Manufacturer / Brand
• Fluke, John, Mfg. Co. Inc.; Everett (WA)

• Year
• 1974 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 256305

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

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Wave bands
• - without

• Power type and voltage
• Line / Batteries (any type) / AC:115; 230, 50-400Hz / DC: 14.4 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: DC Reference Standard 731B - Fluke, John, Mfg. Co. Inc.;

• Shape
• Tablemodel, low profile (big size).

• Dimensions (WHD)
• 107 x 88 x 304 mm / 4.2 x 3.5 x 12 inch

• Notes

• The Model 731B DC Reference Standard is an ultrastable dc power supply which, when calibrated, is capable of providing a variety of precision output voltages with standard cell accuracy. The 731B will furnish basic dc voltage outputs of 10V, 1V,ΔE (000 to 999 μV), 1.018+ΔE, and 1.019+ΔE.

  The desired voltage mode is selected using a front panel function switch and the value of ΔE is adjustable using a 10-turn linear potentiometer. Power to operate the 731B can be derived from either an internal battery pack for field or portable use(30 hours of continuous operation), or from the ac power line for bench use. The output accuracy is +- 10ppm/30days in all ranges ,except for ΔE that has an accuracy of +-2μV/1 Year.

   

   

   

   

   

   

   

   

   

   

   

   

   

   

• Net weight (2.2 lb = 1 kg)
• 2.260 kg / 4 lb 15.6 oz (4.978 lb)

• Mentioned in
• - - Manufacturers Literature

• Author
• Model page created by Antonio Marra. See "Data change" for further contributors.

• Other Models

• Here you find 93 models, 88 with images and 66 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Fluke, John, Mfg. Co. Inc.; Everett (WA)