Sound Level Indicator 1408D

Dawe Instruments Ltd.; Brentford, Middlesex

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  • Year
  • 1961 ?
  • Category
  • Service- or Lab Equipment
  • Radiomuseum.org ID
  • 329472

 Technical Specifications

  • Number of Transistors
  • Semiconductors present.
  • Semiconductors
  • Main principle
  • Audio-Amplification
  • Wave bands
  • - without
  • Power type and voltage
  • Dry Batteries / 9 Volt
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Sound Level Indicator 1408D - Dawe Instruments Ltd.;
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 76 x 153 x 57 mm / 3 x 6 x 2.2 inch
  • Notes

  • Portable Sound Level Indicator

    The Dawe type 1408D is claimed to be the first truly pocket-sized sound level indicator, working completely with transistors and powered by a 9V battery.

    It covers the sound level range of 64-110 dB, employs a built-in crystal microphone, utilises the three standard weighting curves A, B and C to the IEC.
    Service Engineer (UK) Sep 1961, Page 46.

  • Net weight (2.2 lb = 1 kg)
  • 0 lb 14 oz (0.875 lb) / 0.397 kg
  • Mentioned in
  • -- Original prospect or advert (Electronic Engineering, volume 34, year 1962)
  • Author
  • Model page created by Pier Antonio Aluffi. See "Data change" for further contributors.

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