• Year
  • 9999
  • Category
  • Loudspeaker, headphone or earphone
  • Radiomuseum.org ID
  • 222127

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • Magnetic loudspeaker (reed) generic. / Ø 20 cm = 7.9 inch
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Doublet with ID=102711 - United Radio Corporation
  • Shape
  • Tablemodel, Box - most often with Lid (NOT slant panel).
  • Dimensions (WHD)
  • 235 x 235 x 148 mm / 9.3 x 9.3 x 5.8 inch
  • Notes
  • Magnetic speaker in wooden cabinet; annular ring of freely flexible inelastic material applied between the paper cone and steel front. Frame as 7-A (in cathedral cabinet model ID=102710); uses also a U-shaped permanent magnet that surrounds an actuating winding driving a piston which connects to the speaker cone. Input impedance about 1450 ohms; suitable for any output from '01A tubes.
  • Net weight (2.2 lb = 1 kg)
  • 2 kg / 4 lb 6.5 oz (4.405 lb)
  • Author
  • Model page created by Emilio Focosi. See "Data change" for further contributors.

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