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Thread: !NEW! crash resistent PINWHEEL - construction method

  1. #1
    Navigator Kondor-FPV's Avatar
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    !NEW! crash resistent PINWHEEL - construction method

    I thought I'd share the new improved system for building a MUCH stronger pinwheel.
    This cross is made with .6mm copper.
    It's harder to build the antenna with this but it's worth it. Cutting this small piece is very difficult even with a cnc. As it's hard to hold the copper sheet to be cut.

    The SWR does not change at all, but the cross does shift the center frequency up by 20mhz on 1.2 ghz. antennas, as it effectively shortens the lower arms. So I have to readjust the dimensions of the legs by 1 or 2 mm.

    The result is a much sturdier antenna as you can see.
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    www.fpvlr.com - Home of your favourite Custom FPV antennas.

  2. #2
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    I have used this method, but used really thin copper sheet and cut with a exacto!

    With really small parts i have used a cake cutter and wax

    Put the cake cutter on top of the material, poor your melted wax into the cutter, and then use this to hold down parts, then you can remelt the part and wax!

  3. #3
    Navigator Kondor-FPV's Avatar
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    Quote Originally Posted by Calviin_carl View Post
    Yeah dude! I have also use this method but this method is risky, I think you not try this method and If you want to try this method then please take care of yourself during this method.
    that's why they are cut with a cnc machine.. not by exacto knife, plus I use .6mm copper so it's too think to cut by xacto knife.
    www.fpvlr.com - Home of your favourite Custom FPV antennas.

  4. #4
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    ok now thats cool this is stuff i'm wanting to to learn thanks for the post JON

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