London Transport's small-bore tube tunnels represent a hostile environment in which to establish a speech link with moving trains. Deficiencies in the carrier wave system introduced on the Victoria line in 1968 led to experiments with multi-base stations and balanced leaky-feeder cables on the Bakerloo, but coaxial feeders with one-way repeaters are giving better results on the Northern line.

  • Availability:
  • Corporate Authors:

    IPC Transport Press, Limited

    Dorset House, Stamford Street
    London SE1 9LU,   England 
  • Authors:
    • Alexander, L M
  • Publication Date: 1976-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00139501
  • Record Type: Publication
  • Source Agency: British Railways
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM