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Thread: In line filters

  1. #1

    In line filters

    Does anybody have any experience with those in-line filters that attach to the coil wire and claim to reduce EMI and RFI interference?

  2. #2

    Re: In line filters

    Never heard of them. I have seen frequency shifters, but those were mainly a gimick. I think the only real use they found was for competition hunters to keep from cross-talking to same-model detectors.

    Are they still making these? I don't remember seeing one in many years.
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  3. #3
    Administrator del's Avatar
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    Re: In line filters

    Quote Originally Posted by hftrsrskr link=topic=8114.msg92311#msg92311 date=1323315792
    Does anybody have any experience with those in-line filters that attach to the coil wire and claim to reduce EMI and RFI interference?
    hello hftrsrskr , welcome to the forum
    they do still make these for some detectors and some guys will swear by them . what detector did you want it for i might be able to help you locate some .

    Dan

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    so don't expect it from cheap people"

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  4. #4

    Re: In line filters

    I have a Vaquero and a Compadre and saw the filters on ebay for 6-7 bucks. Just wondered if they did anything.

  5. #5
    Administrator del's Avatar
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    Re: In line filters

    most of these you see are just standard ferrite bead inline filters and will reduce some emi from high power tension wires but most of your emi issues are under that khz and they won't do much if anything to help with that . you could give them a try its your buck.

    Dan
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  6. #6
    Global Moderator CyberSage's Avatar
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    Re: In line filters

    This is my experience with them Dan. They do help a little directly under high voltage lines, but have no effect most of the time. They are cheap, and radio shack carries two different types. Honestly, I wouldn't waste my money them.
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  7. #7

    Re: In line filters

    Would there be a gain loss with an inserted device in-line? I'd think that there'd possibly be a 3db hit, half power with the extra connectors. Just a thought.

  8. #8
    Global Moderator CyberSage's Avatar
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    Re: In line filters

    It does not actually plug into the cable. It snaps on around it, or in the case of the circular ones the cable is just threaded through it twice.

    "Knowledge counts but common sense matters." ~ LouAnne Johnson

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  9. #9

    Re: In line filters

    I see, it is a ferrite bead. Thanks. Does it mount near the box or near the coil? martin

  10. #10
    Global Moderator CyberSage's Avatar
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    Re: In line filters

    I would think as close to the box as you can get it.
    "Knowledge counts but common sense matters." ~ LouAnne Johnson

    Minelab E-Trac - Whites Vision/V3 - JeTco GTX Huntmaster - Whites Bullseye TRX - Garrett Pro-Pointer

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