Audio C & R tester

Amroh NV (Radio Bulletin monthly), Muiden

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  • Year
  • 1965
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 231559

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

 Technical Specifications

  • Number of Transistors
  • 3
  • Main principle
  • none
  • Wave bands
  • - without
  • Power type and voltage
  • Dry Batteries / 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 8.5 cm = 3.3 inch
  • Power out
  • 0.2 W (unknown quality)
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Audio C & R tester - Amroh NV Radio Bulletin
  • Shape
  • Miscellaneous shapes - described under notes.
  • Dimensions (WHD)
  • 250 x 64 x 125 mm / 9.8 x 2.5 x 4.9 inch
  • Notes

  • This tester is built in a box from aluminium Uniframe parts: 6x UF 003, 2x UF 004 and 2x UF 005.

    The circuit is based on "measuring" and "verifying" AF frequencies. When they are the same while measuring an unknown resistor, its value can be read on the scales of resistors R3/R5.

    When testing a capacitor of 10.000 pF or more, a measured resistance value higher than 330 kOhm means that the capacitor can be regarded as leak-free. Low voltage electrolytic capacitors can be regarded as leak-free when the measured value is higher than 100 kOhm.

  • Mentioned in
  • Radio Blan edition 31, 1 september 1965
  • Author
  • Model page created by Rob Majoor. See "Data change" for further contributors.

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