Telegraph line balancing Instrument

Muirhead & Co. Ltd.; Beckenham

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  • Year
  • 1905 ??
  • Category
  • Morse-Equipment & TTY, RTTY, TDD etc.
  • Radiomuseum.org ID
  • 356535

 Technical Specifications

  • Wave bands
  • - without
  • Power type and voltage
  • No Power needed
  • Loudspeaker
  • - - No sound reproduction output.
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Telegraph line balancing Instrument - Muirhead & Co. Ltd.; Beckenham
  • Shape
  • Tablemodel, high profile (upright - NOT Cathedral nor decorative).
  • Dimensions (WHD)
  • 330 x 478 x 480 mm / 13 x 18.8 x 18.9 inch
  • Notes

  • Instrument to balance the telegraph line for duplex operation.

    The telegraph duplex device allows simultaneous transmission of two messages in opposite directions on a single wire. It uses a differential relay and artificial line to cancel out the effects of outgoing signals, enabling the reception of incoming messages without interference. This innovation doubled the capacity of existing telegraph lines

    Developed into two main categories: needle telegraphs (Cooke and Wheatstone telegraph, 1837) and armature systems (Morse system, 1838).

    There is also a cylindrical box from H.Tinsley on the bottom of this device.
    More infos are welcome

    Glass panes in wooden frames

  • Mentioned in
  • -- Collector info (Sammler)
  • Author
  • Model page created by Heribert Jung. See "Data change" for further contributors.

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The model Telegraph line balancing Instrument is part of the collections of the following members.

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