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  • #9684 Svara
    Marcus
    Gäst

    Are you able to provide the following antenna-related information, please?

    1) What is the diameter and conductor (e.g. copper, steel, etc.) of the top-loading wires?

    2) Are the top-loading wires at 127 m or is that the top of the support mast and the top-loading wires are slightly lower?

    3) How much do the top-loading catenary wires sag by? Or what is the height of the top-loading wires half-way between each mast?

    4) What is the diameter of the cage of wires that form the near-vertical radiators? Also, what is the conductor (e.g. copper, steel, etc.)?

    Thanks in advance,

    Marcus

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    • #9706 Svara
      Marcus
      Gäst

      Dear Fredrik

      Thank you very much for the clear information.

      Best regards

      Marcus

    • #9701 Svara
      Marcus
      Gäst

      Dear Fredrik

      Thank you for responding and apologies for asking further.

      Regarding the phosphor bronze top-loading wires, is the diameter 72.5 mm? Was it a typo with 7×2.5mm? The top loading wires are visible on photos showing all the masts, which makes me think they have a wider diameter.

      Also, the vertical radiator going up from the inductors on towers 2-5 appear to be a cage of six or eight wires in photos. What is the diameter of the cage of wires? I assume they are also phosphor bronze?

      Thanks once again.

      Marcus

    • #9700 Svara
      AlexanderSAQ
      Keymaster

      Dear Marcus,
      The antenna top distribution net is made from 8 pcs 7×2.5mm phosphor bronze wires. The 8 wires are mounted on isolators, hanging down from the top support structure. The sag between each tower is approx. 17m, depending on the temperature.
      At each tower, there is a tuning coil, made from litz wire, 1.8m in height and 2.7m in diameter. On tower 1 and 6 the coil is located were the top network is going up/comming down. On tower 2-5 the tuning coil is connected to a near-vertical lead, connected to the top distribution net.

      Fredrik/AlexanderSAQ

      • #9702 Svara
        AlexanderSAQ
        Keymaster

        Dear Marcus,
        A phosphor bronze wire consists of 7 strands, each 2.5mm in diameter, twisted into a helix, forming a rope.
        The vertical radiator in tower 2-5 is made from six thinner phosphor bronze wires, see image https://commons.wikimedia.org/w/index.php?curid=1296820, separated by a metal ring, 250mm in diameter.

        Fredrik/AlexanderSAQ

        • Det här svaret redigerades för 1 månad, 1 vecka sedan av AlexanderSAQ.
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