• Country
• Great Britain (UK)

• Manufacturer / Brand
• Wayne Kerr; New Malden, England

• Year
• 1960 ?

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 361425

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

• Number of Tubes
• 3

• Valves / Tubes
• 12AX7 6X4 6U5G

• Wave bands
• - without

• Power type and voltage
• Alternating Current supply (AC) / 100-125; 200-250 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Metal case

• from Radiomuseum.org
• Model: Component Bridge B521 - Wayne Kerr; New Malden,

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

• Dimensions (WHD)
• 435 x 295 x 185 mm / 17.1 x 11.6 x 7.3 inch

• Notes

• Component Bridge B521

  Has the ability to measure complex impedances over the range 1 milliohm to 1000 megohms whilst still in circuit.

  Accurate to +2%, the B521 is a transformer ratio-arm bridge of advanced design intended for the rapid, direct measurement of virtually all components and networks in research or development laboratories, in the manufacture and servicing of radio, television, and electronic equipment,t and for a variety of industrial applications.

  Employment of the transformer ratio-arm principle— affording 2, 3 or 4 terminal measurements—makes it possible to measure any arm of a delta network in the presence of the other arms. This means, in effect, that even when dealing with a highly complicated electronic chassis, it is no longer necessary, as it is with a conventional Bridge, to unsolder individual components in order to ascertain their true value. This facility is particularly important at a time when the printed circuit is coming into even wider use.

  10 measuring ranges each for:

  • Resistance 1 mΩ to 1000 MΩ
  • Capacitance 1 pF to 5 F
  • Inductance 1 µH to 500 kH

• Net weight (2.2 lb = 1 kg)
• 6.8 kg / 14 lb 15.6 oz (14.978 lb)

• Mentioned in
• - - Manufacturers Literature

• Literature/Schematics (1)
• -- Original prospect or advert (Electronic Engineering Mar 1961, Page 80.)

• Author
• Model page created by Ulrich Bretz. See "Data change" for further contributors.

• Other Models

• Here you find 34 models, 33 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Wayne Kerr; New Malden, England