• Country
• Great Britain (UK)

• Manufacturer / Brand
• Megger Group Limited, Dover,

• Year
• 1977

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 187134

• Wave bands
• - without

• Power type and voltage
• Solar- and/or muscle driven, also addl. power jack possible

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Earth Tester Biddle Catalog 63220 - Megger Group Limited, Dover,

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

• Dimensions (WHD)
• 9.5 x 6.5 x 5 inch / 241 x 165 x 127 mm

• Notes
• This Earth Tester was sold in the United States by James G. Biddle Co. of Pennsylvania under license by Megger Group Limited. It measures ground resistance using a hand-cranked oscillator with four resistance ranges adjustable from 0.01 to 9990.00 Ohms. It measures the ground resistance by applying a test current through an earth electrode under test which returns through the soil and a remote terminal. The potential between the earth electrode and a remote terminal potential is observed and balanced against an equal potential in the Earth Tester. When a null condition is achieved, a read out in ohms is displayed on a meter which, under proper test procedures, is the earth electrode resistance.

• Net weight (2.2 lb = 1 kg)
• 6 lb (6 lb 0 oz) / 2.724 kg

• Source of data
• - - Data from my own collection

• Author
• Model page created by Mark Wm. Manis. See "Data change" for further contributors.

• Other Models

• Here you find 5 models, 5 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Megger Group Limited, Dover,