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5/8 wave ground plane 11 meters

Discussion in 'Home Brew' started by Christopher17, Jun 3, 2019.

  1. Christopher17

    Christopher17 LongStride

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    for my next antenna project I'm doing 5/8 wave ground plane , my design uses aproximatly 21 foot driven element with four 1/4 wave 102" radials set at 45° , unlike my current homebrew 1/4 wave ground plane the new one will require some kind of matching transformer, I have seen some balancers made with coils of wire and some using a capacitor along with coils of wire, buying a balun is not out of the question, I would like to be able to make my own if I could understand it better.


     
    357magnum and Shadetree Mechanic like this.

  2. sp5it

    sp5it Master of puppets

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    357magnum likes this.
  3. Christopher17

    Christopher17 LongStride

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    Interesting reading , the pi design overly complicated for a single use 11 meter
    thinking something like this ?
     

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  4. Christopher17

    Christopher17 LongStride

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    then this but I don't understand
     

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  5. Christopher17

    Christopher17 LongStride

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    the 5/8 super penetrated does something similar to this for its balancer
     

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  6. binrat

    binrat WDX Club Coordinator
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  7. Christopher17

    Christopher17 LongStride

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    thanks binrat
     
  8. binrat

    binrat WDX Club Coordinator
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    Oh, it was never built unless there is pictures. ;):ROFLMAO:
     
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  9. Christopher17

    Christopher17 LongStride

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    will add pics when completed :)
     
  10. Christopher17

    Christopher17 LongStride

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    looking at this simple solution , has anyone have experience with this kind of matching transformer, I am assuming the tap point is critical depending on what frequency, this looks similar to the matching transformer on the Hy-Gain 5/8 ground plane , may just have to play with it , think I could make it variable with a hose clamp , move it around the ring to get best receive, no analyzer as of yet
     

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  11. binrat

    binrat WDX Club Coordinator
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    When I did one I just wrapped the wire around it until I got the antenna resonant, then soldered it.
     
  12. Bluestone

    Bluestone New Member

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    This one works great I built this exact design, works great. Good signal and good for dx
     
  13. HomerBB

    HomerBB Sr. Member

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    All you need is a coil (inductor).
    Bottom of coil and coax shield to the radials.
    Center conductor of coax to the 50 Ohm tap point on the coil. Top of coil to the vertical radiator.
    The radials are isolated from the vertical radiator except through the coil itself. The radials are located at the bottom of the coil where the braid attaches.

    Screenshot_20210427-000235_Photobucket-02.jpeg
     
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  14. HomerBB

    HomerBB Sr. Member

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    The 5/8 will perform better with horizontal radials.
     
  15. HomerBB

    HomerBB Sr. Member

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    Screenshot_20190610-221758-01-01.jpeg
     
    Holydvr, NZ8N, Jay Mojave and 3 others like this.

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