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Bell System news article from 1961

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  • Matthew Sadler, KF4LHP
    One of the TD-2 station pics with the delay lens antennas is part of this article, from 1961... found this interesting. Also, anyone have any information on
    Message 1 of 2 , Apr 19, 1999
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      One of the TD-2 station pics with the delay lens antennas is part of
      this article, from 1961... found this interesting. Also, anyone have any
      information on K-carrier?

      SERVICE QUICKLY RESTORED AFTER REPEATER STATION BLASTS

      Early Sunday morning, May 28, the TD-2 repeater stations at Wendover,
      Nevada
      and Cedar Mountain, Utah, and the K repeater station at Knolls, Utah
      were blown up and virtually destroyed, interrupting both the central
      transcontinental microwave and K-carrier routes. More than 2200
      telephone and telegraph circuits and four television channels were
      interrupted.
      Two thirds of the telephone circuits, all critical services and all TV
      and radio circuits were made good by rerouting within a few hours after
      the blasts. The radio systems were rerouted around the damaged section
      by way of Los Angeles within two hours. By Sunday evening all circuits
      affected by the explosions had been made good, using spare facilities
      and protection radio channels.
      Pre-arranged emergency service restoration plans worked smoothly. In
      less than 30 minutes after word was received, men and materials were
      moving to the three stations. Portable microwave equipment and
      truck-mounted towers were flown to the two radio relay locations.
      Despite the high number of circuits blanked out, the effect on traffic
      was light. Many military private line circuits were not affected at any
      time by the explosions because of alternate routings. Also, many other
      private line circuits were individually rerouted with minimum delays.
      One two-way TD-2 channel was made available between Salt Lake City
      Junction and Los Angeles Tuesday night, May 30, by expediting
      installation of new channels that were nearing completion. This released
      some of the protection channels that had been used for reroutes.
      Portable TE microwave equipment was brought into restore service across
      the breaks. By June 2 four TE channels had been set up, two for message
      service, one for TV, and one for protection. Five K-1 systems were
      restored by cutting the cable through at Knolls and using additional
      amplifiers at the adjacent stations.
      Temporary buildings have been constructed at the three sites, and a
      temporary installation of TD-2 equipment has been made at the two radio
      sites to serve until permanent rebuilding can be done. This installation
      was completed by June 4. Permanent restoration is expected to be
      completed at all three locations before September 1.
      As a precautionary measure, National Guardsmen had been posted quickly
      at all unattended K-carrier and radio-repeater stations in the area.
      They were replaced by Bell System guards a few days later. Many normally
      unattended stations in Utah, Nevada and California are continuing to be
      attended or guarded.
      --
      Matthew, KF4LHP ICQ: 6280641
      Web: http://www.qsl.net/kf4lhp/ EMail: kf4lhp@...
      ============================================================
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    • Mark Foster
      ... Type K Carrier - 12 to 60 KHZ SSB over buried cable. 12 channels per carrier. Predecessor to L Carrier. 17 mile spacing between repeaters. See the
      Message 2 of 2 , Apr 20, 1999
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        At 11:57 PM 4/19/99 -0500, you wrote:
        >From: "Matthew Sadler, KF4LHP" <kf4lhp@...>
        >
        >One of the TD-2 station pics with the delay lens antennas is part of
        >this article, from 1961... found this interesting. Also, anyone have any
        >information on K-carrier?
        >

        Type K Carrier - 12 to 60 KHZ SSB over buried cable. 12 channels per
        carrier. Predecessor to L Carrier. 17 mile spacing between repeaters. See
        the History of Engineering and Science in the Bell System (Transmission
        Technology 1925 to 1975) page 75 on.

        NOTE: Also am looking for a complete or incomplete set of the History of
        Engineering and Science in the Bell System. Will pay a reasonable price
        for these volumes (3).
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