NVIS Screwdriver antenna

Discussion in 'Mobile Radio Systems' started by NT5CC, Sep 11, 2020.

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  1. NT5CC

    NT5CC XML Subscriber QRZ Page

    NVIS is regional comms specifically for a near vertical take off angle using equipment designed specifically for that purpose. Labeling any which just happens to capture a short hop is not NVIS. It's a method not a result.
     
  2. NT5CC

    NT5CC XML Subscriber QRZ Page

    The question was about stress due to having the whip bent over and tied off. Relieving THAT stress by introducing a spring was the entire purpose of my post.
     
  3. NT5CC

    NT5CC XML Subscriber QRZ Page

    A better description would be "understood." The mechanics of that understanding is what came to drive the development of antenna systems specifically for taking advantage of steep takeoff angles specifically for regional comms. ie a NVIS system.
     
  4. KX4O

    KX4O Ham Member QRZ Page

    Ah got it. Does your system rotate the upper whip while tuning?
     
  5. NT5CC

    NT5CC XML Subscriber QRZ Page

    No, it's a Tar Heel 75A.
     
    KX4O likes this.

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