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Thread: ground noise on base radio ugh!!!!!

  1. #11
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    LFA acronym or foreign to me. I'm more familiar with PVA, NVA, or LSMFT. Am wanting toroid balun for 25-30MHz.
    https://www.kf7p.com/KF7P/RF_chokes.html speak of such over a very wide HF spectrum. Would rather narrow it down. Their example using RG-400 (0.195"D) only slightly less loss than RG-58, has 13 turns on a 240-?? toroid.

    Im more inclined to use 12 or 14 AWG stranded copper in lieu of coax. Recommendations would be helpful?
    Last edited by Alabama Buckeye; 03-30-2022 at 11:44 PM.
    All answers are opinions and may, or may not be technically correct.

  2. #12
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    LFA stands for loop fed array. A very effective antenna.
    My choke recommendations are proven.
    If you are winding a 1:1, the use of stranded, silver coated, Teflon insulated wire is imperative. Well, at least from what I have read. Apparently, a current balun can be quite lossy when using alternatives like magnet wire. I avoid this and other problems like weatherproofing with a coaxial choke.

  3. #13
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    Hate to co-opt a thread, "grnd noise base radio" here but if you'd elaborate on Teflon wire? By silver coated might I presume "tinned" strands is meant?

    Or, are you speaking of coax, perhaps RG-400, when speaking of Teflon?

    Yes, a 1:1 choke Balun. Too young to know benefits of any other. Number of pass-through windings is of greatest importance. Wanting to narrow down or make Balun focused to 25-30MHz bandwidth, if advisable or beneficial?

    I'd gave thought to magnet winding wire; but, deterrent was wire at hand, 18 & 22 AWG. I'm thinking, wrongly or not, a 14 or 12 AWG would stand up to 1500W longer. And am inclined toward silicone jacket for flexibility.

    https://www.balundesigns.com/referen...ntchoke-balun/
    Seems 11 turns of RG coax prevalent in their 1.8-50MHz Baluns.

    LFA Yagi Uda sure appears to have great advantage over NBS Yagi, at least on paper.
    Last edited by Alabama Buckeye; 04-01-2022 at 11:24 AM. Reason: mag wire V 12 AWG; silicone; coax/teflon;1.8-50; LFA v NBS
    All answers are opinions and may, or may not be technically correct.

  4. #14
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    Teflon insulated multi stranded silver coated wire. There's a few YT vids on this.
    The choke design comes from an in depth article on audiosystems group.com

  5. #15
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    So not coax? RG400 appears to fit the requirements?

  6. #16
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    Minimum bend radius.

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