WRN/2 Pickup

Commonwealth Electronics Pty. Ltd.; Hobart, TAS

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  • Year
  • 1958
  • Category
  • Microphone or Pick-up element
  • Radiomuseum.org ID
  • 307525

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: WRN/2 Pickup - Commonwealth Electronics Pty.
  • Notes

  • Tonearm with magnetic cartridge used with Commonwealth Electronics 12” and 16” transcription turntables.

    The pickup is of the wide gap variable reluctance type with cantilever stylus.

    Has a design feature which permits the stylus to be changed instantly by removing the front plate complete with stylus, armature and suspension as a unit, thus eliminating the need for small electrical contacts or pins between the pickup head and tone arm. The plate is held in place magnetically and located by two dowel pins.

    Advertised for £25/12/-  complete with matching transformer in January 1959.

    SPECIFICATIONS MECHANICAL;

    Stylus Pressure

    Approximately 6 grams. Operation is
    satisfactory down to 3 grams, but the
    above figure has been selected as the best compromise.

    Lateral Compliance at stylus Tip

    Not less than 5 x 10 - 6 cm/dyne.

    Vertical Compliance

    Not less than 2 x 10 - 6 cm/dyne.

    Effective Mass to Lateral  Movement

    Approx. 2.5Mg.

    Effective Mass to Vertical Movement

    Approx. 1.5Mg.

    Stylus Radius.

    0.001" for microgroove records.
    0.0025" for standard records.

    Stylus Change

    Removable front plate assembly.

    Suspension

    Bonded neoprene.

    Tracking error

    Less than 40

    Tone-arm Mounting Centres

    12" Model – 7.6”   16" Model – 10.75".

    Counterweight Overhang

    12" Model – 2.5”   16" Model - 3"

     

    SPECIFICATIONS ELECTRICAL;

    Frequency Response

    Microgroove or standard stylus
    Within + or - 2dB, 20-14000 Hz

    Intermodulation

    Less than 2% measured at 100 Hz. And 7000 Hz. (Cook record).

    Tone Arm Resonance

    20 Hz + or – 5Hz.

    Output Voltage

    Approx. 10/MV/CM in 150,000 ohms.

    Load Impedance Transformers

    Available in 50, 200, 500 or l50k ohms balanced.
  • Price in first year of sale
  • 25.60 AUS £
  • Mentioned in
  • -- Original prospect or advert (Radio & Hobbies, Jan 1959, page 100)
  • Author
  • Model page created by Gary Cowans. See "Data change" for further contributors.

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