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Does a fence antenna work?

Discussion in 'Amateur Radio News' started by KD5W, Jul 6, 2024.

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  1. KI4KWR

    KI4KWR Platinum Subscriber Volunteer Moderator Platinum Subscriber QRZ Page

    Worked for several here in Alabama...
     
    N3AWS likes this.
  2. KD5SHY

    KD5SHY Ham Member QRZ Page

    I would think that T-post placed close to the fence with electric fence insulators would work well. 8 foot t-post driven into the ground two feet deep. You could put this anywhere in your back yard and no one would be the wiser.
     
    N3AWS and WB5YUZ like this.
  3. K6BRN

    K6BRN Platinum Subscriber Platinum Subscriber QRZ Page

    HF band being worked makes a BIG difference.

    I strung a 160M wire antenna around the perimeter of my SoCal QTH, on the wooden fence, which is about 6-7 feet tall. That worked very, very poorly, probably due to 1: WAY too low to the ground (from a wavelength perspective it was practically sitting on the ground - less than 2% L above it), 2. It was bent in the shape of a "U" (like a staple), where radiation in opposing legs tends to cancel out, and 3. It was between houses spaced only 10 feet apart on the sides. I was able to run 100-150W before transformer heating became obvious.

    My roof mounted CHA-250B vertical, which is very, very, very inefficient and is not designed for 160M - worked much better and I've made dozens of 160 M contacts with it at about 25-50W. THIS is a pretty LOW standard.

    STILL do not have a good solution for 160M on this very limited lot.

    Brian -K6BRN
     
  4. VK5OHR

    VK5OHR Ham Member QRZ Page

    Like this?

    [​IMG]

    :p:D
     
  5. K6BRN

    K6BRN Platinum Subscriber Platinum Subscriber QRZ Page

    A toy car with a fake bedspring on top. Hmmm. Your jokes are worse than mine! I didn't think that was possible.

    Brian - K6BRN
     
  6. K4PIH

    K4PIH Ham Member QRZ Page

    Get over yourself. I used to do the same as well as my brother and father on tube transceivers. Back when radios were either home or kit built., surplus military.
     
    W0BTU and N3AWS like this.
  7. W1YW

    W1YW Ham Member QRZ Page

    Stop being personal. Dangerous acts need to be called dangerous acts. Its 2024 and you need to get with t.

    EOL.
     
    KR3DX likes this.
  8. K7JQ

    K7JQ Ham Member QRZ Page

    What? You mean that the little filament inside a light bulb isn't a miniature loop antenna?
    When I was a kid, I loaded up my DX-40 into my kid brother's orthodontic braces.
     
    Last edited: Jul 22, 2024
    N3AWS and WS4JM like this.
  9. K5YDD

    K5YDD XML Subscriber QRZ Page

    Headgear would have made it multiband.
     
    N0TZU, N3EDO and K7JQ like this.
  10. W1RDT

    W1RDT Ham Member QRZ Page

    Yeah, but can it tun-a-fish?
     
    KK5JK, KB9GHN, K4PIH and 1 other person like this.
  11. KK9W

    KK9W Ham Member QRZ Page

    Was one of those contacts to BARBados?
     
    KK5JK and W2VW like this.
  12. AI8O

    AI8O XML Subscriber QRZ Page

    <major snip>
    After seeing people ask online if they could string a wire on top of their fence and use it as an antenna, I decided to see how it would work. While there are definitely better antenna options available, this method can get you on the air, especially if you're living in a strict HOA environment. However, be cautious about placement to ensure no one can get too close to the wire and do your exposure calculations. Would be best to not put it on a shared fence. Additionally, keep in mind that if your fence gets wet, it will detune the antenna significantly.

    [/QUOTE]

    Any piece of metal isolated from ground will radiate RF.
    The question is HOW efficiently will it radiate RF.
     
    N3AWS and KO4CES like this.
  13. K6HPX

    K6HPX Premium Subscriber QRZ Page

  14. N2CST

    N2CST XML Subscriber QRZ Page

    You mentioned about using a 9:1 Balun. Did you mean a 9:1 UNUN?
     
    W0BTU likes this.
  15. K8TE

    K8TE Premium Subscriber QRZ Page

    We used a Cushcraft A4 beam at 40 ft. and an 80/40m trap dipole at 35 ft. to make 2,106 QSO's, 1,258 on 20m. Per K0BG: WORKs (WithOut Real Knowledge). Take the advice of those who put up real antennas, like a half-wave dipole. Steve, K0UO, knows what he is talking about! 73 Bill, K8TE
     
    KR3DX likes this.

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