• Country
• Great Britain (UK)

• Manufacturer / Brand
• CROPICO, Croydon Precision Instruments; Croydon

• Year
• 1958 ??

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 236362

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

• Wave bands
• - without

• Power type and voltage
• Powered by external power supply or a main unit.

• Loudspeaker
• - - No sound reproduction output.

• Material
• Wooden case

• from Radiomuseum.org
• Model: Wheatstone Bridge PW2 Portable - CROPICO, Croydon Precision

• Shape
• Tablemodel, Box - most often with Lid (NOT slant panel).

• Dimensions (WHD)
• 318 x 200 x 215 mm / 12.5 x 7.9 x 8.5 inch

• Notes

• The PW2 is a manually balanced Wheatstone bridge with a usable range from 10 milliohms to 11 megohms. Four decades of switched resistances provide four-digit resolution (from 1 milliohm on the 10 ohm range to 1kohm on the 10 megohm range. Separate multiply by and divide by switches, each spanning four decades from 10 to 10,000 act to modify the scaling of the switched resistances.

  There is no internal power supply in the original, a battery of at least 2V would have been connected to the Battery terminals. In this modified example, a very neat 240V AC mains power supply has been built in to the lid, with plug-selectable voltages from 1.5V to 18V.

• Net weight (2.2 lb = 1 kg)
• 14 lb 0 oz (14 lb) / 6.356 kg

• Author
• Model page created by Gwyn Griffiths. See "Data change" for further contributors.

• Other Models

• Here you find 4 models, 3 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from CROPICO, Croydon Precision Instruments; Croydon