• Year
  • 1925 ?
  • Category
  • Microphone or Pick-up element
  • Radiomuseum.org ID
  • 358280

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Material
  • Metal case
  • from Radiomuseum.org
  • Model: Pick-up Soundbox No. 4 - HMV Brand, His Masters Voice,
  • Dimensions (WHD)
  • 65 x 75 x 22 mm / 2.6 x 3 x 0.9 inch
  • Notes
  • The HMV No. 4 was introduced in 1925. Early versions with the name and trade-mark behind the mica (1925/26), made of brass. By the end of 1928, the backplate was being made in diecast alloy, as was the bezel in 1930.

    Different variants were produced:

    • nickel plated
    • gold plate

    Also made as:

  • Net weight (2.2 lb = 1 kg)
  • 0.150 kg / 0 lb 5.3 oz (0.33 lb)
  • Mentioned in
  • - - Manufacturers Literature
  • Author
  • Model page created by Nico Jacobsen. See "Data change" for further contributors.

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