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Thread: inverted V uhf

  1. #21
    Navigator FPV-PLASTICS's Avatar
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    Hi alex

    About the ferrit
    It s working like a ant matcher???

  2. #22
    Navigator FPV-PLASTICS's Avatar
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    Hi alex back again

    You have your one antenne s line


    433MHz Turnstyle UHF Antenna (IBCrazy)
    I can find any ferrite on your antenne

  3. #23
    Navigator FPV-PLASTICS's Avatar
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    hi guys

    i did some thinking and read on the net
    talking whit a buddy about the ferrite story

    alex we can,t buy balanced coax
    so a balun really rocks
    and ferrite whit more turns, rocks to





    but on the net they alwase talking about a tx antenne

    the 7 turn ferrite or better the balun fit,s into bigger planes

  4. #24
    Engineer for Jesus Christ IBCrazy's Avatar
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    Rob,

    This will save you a lot of time making baluns:
    http://www.alliedelec.com/search/productdetail.aspx?SKU=70065390

    Run the cable through the middle and the cable goes to ~3000 Ohms or so. That's plenty balanced. It fits an RG316 cable perfectly

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    videoaerialsystems.com - Performance video piloting

  5. #25
    Engineer for Jesus Christ IBCrazy's Avatar
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    Quote Originally Posted by FPV-PLASTICS View Post
    hi guys

    i did some thinking and read on the net
    talking whit a buddy about the ferrite story

    alex we can,t buy balanced coax
    so a balun really rocks
    and ferrite whit more turns, rocks to





    but on the net they alwase talking about a tx antenne

    the 7 turn ferrite or better the balun fit,s into bigger planes
    Rob, this is a 4:1 balun. I would not recommend it for a straight dipole but it works really well for a folded dipole! A folded dipole (1 wavelength loop) is around 200 Ohms. The 4:1 balun brings it to a perfect 50 and balances it. Try it!

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    videoaerialsystems.com - Performance video piloting

  6. #26
    Engineer for Jesus Christ IBCrazy's Avatar
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    Quote Originally Posted by Elmardus View Post
    very very interesting. Does this ferrite ring have a good effect on all antenna's? I mean does it work for transmitter AND receiver antenna's?
    Why aren't we using this on all cloverleaf antenna's? because if it improves radiaton pattern, why are we not using it? Or is it not for high frequencies like 5.8, and only for 433MHz....?
    Yes it does. Check my BluBeam Ultras. You'll see ferrite beads on them to balance them.

    Some antennas can be geometrically balanced (my vee is a prime example of geometrically balanced). Others require a device balun such as the Crosshair (1/4 wave choke balun), Mad Mushroom (ferrite balun), or AMOS-5 (4:1 balun).

    -Alex
    If it is broken, fix it. if it isn't broken, I'll soon fix that.

    videoaerialsystems.com - Performance video piloting

  7. #27
    Navigator FPV-PLASTICS's Avatar
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    thanks alex for feedback

    i order 200 ferrite core

  8. #28
    Navigator Nakelp86's Avatar
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  9. #29
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    Re: horizontally inverted V uhf

    Quote Originally Posted by IBCrazy View Post
    @Rob - Mind your polarization. Remember to tell people your Vees are horizontally polarized when mounted like that.

    I like your style. This is better to have a counterpoise and they're easy to mount.

    -Alex
    Rob & Alex,
    If one is to use a horizontally polarized vee, why not lay it down on the wing or embed in the wing for improved aerodynamics?

  10. #30
    Navigator FPV-PLASTICS's Avatar
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    hi

    mount your inverted V horizontal gif you the best 360 pattern


    rob
    Last edited by FPV-PLASTICS; 25th May 2013 at 12:46 PM.

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