Laboratory Series Stereo Cartridge

Grado Laboratories Inc.; Brooklyn (NY)

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  • Year
  • 1962–1964
  • Category
  • Microphone or Pick-up element
  • Radiomuseum.org ID
  • 303037

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - For headphones or amp.
  • from Radiomuseum.org
  • Model: Laboratory Series Stereo Cartridge - Grado Laboratories Inc.;
  • Notes

  • First stereo moving coil cartridge.

    Frequency Response: 10-30,000 Hz +/- 1 dB
    Output: 9 mV per channel @ 10 CMV
    Impedance: 1100 Ohms per channel
    Tracking Force: 3 grams
    Stylus Mass: 0.3 milligram
    Channel Separation: 30 dB
    Diamond Stylus: 33.333 rpm / 78 rpm available.
    No magnetic attraction: May be used on steel turntables

    Grado 1st generation stereo moving coil cartridges were replaced in 1964 by Grado Tracer-Beam cartridges. Grado patent 3040136 filed Jan 1959 for first moving coil cartridge issued June 19, 1962. This patent shows their mono moving coil cartridge, but principal also applied to stereo.

  • Price in first year of sale
  • 49.50 USD
  • Mentioned in
  • 1962-Apr- HIGH FIDELITY page 52
  • Literature/Schematics (1)
  • 1962 Grado Catalog
  • Literature/Schematics (2)
  • Patent (3040136)
  • Author
  • Model page created by Matt Endicott. See "Data change" for further contributors.

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The model Laboratory Series Stereo Cartridge is part of the collections of the following members.

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