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Loading coil orientation

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by G0VKT, Jun 6, 2021.

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  1. G0VKT

    G0VKT Ham Member QRZ Page

    A base loaded vertical is always shown with the loading coil in line with the element. Can it be at 90 degrees?

    I am building a base loaded antenna that has a remote switched loading coil. It will be in the middle of the roof of my mobile home. The roof is aluminium and it will be used as the GP.

    Mechanically it will be simpler to have the coil at 90 degrees and a few inches above the roof.


    Paul G0VKT
  2. WA4SIX

    WA4SIX Ham Member QRZ Page

    No problem in doing that.

    N8ZL, AK5B and KU3X like this.
  3. WA7ARK

    WA7ARK Ham Member QRZ Page

    How many taps will be switched?
  4. W9IQ

    W9IQ Ham Member QRZ Page

    If the coil does not have a significant electrical length, it will not radiate so you can freely change its orientation. This is exactly what happens when an antenna tuner is used as the various L and C values are selected.

    - Glenn W9IQ
  5. G0VKT

    G0VKT Ham Member QRZ Page

    Many thanks for your replies.

    It will start as a 1/4 wave on 10m. Then add a loading coil for 20m. Then switched taps for 20 to 10m.

    Another post will show how it will all be mounted.

    Paul G0VKT
    AK5B likes this.
  6. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    When I sent my loading coil to Orientation, he came back crying.:p
    2E0CIT, K9UR, AK5B and 1 other person like this.
  7. KQ0J

    KQ0J XML Subscriber QRZ Page

    My coil looks like 90 Degrees but it identifies as straight.
    2E0CIT, WB5THT and AK5B like this.
  8. KI8DJ

    KI8DJ Ham Member QRZ Page

    My loading coil is named Henry.
    2E0CIT, WB5THT and AK5B like this.
  9. AK5B

    AK5B Ham Member QRZ Page

    And the little ones---don't tell me---1 Micro Henrys, 2 Micro Henrys, 3....perhaps?
    2E0CIT and WB5THT like this.

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