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North/South or East/West Antenna Alignment?

Discussion in 'Amateur Radio Antennas' started by Keith Thompson, Feb 13, 2018 at 12:49 PM.

  1. Keith Thompson

    Keith Thompson
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    Guns & Radios, KC1IYT, Icom IC-7300, Yaesu FT-60R

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    I have a 140' dipole antenna that I'll be hanging sometime this week for use with my Icom I-7300. I'm in southern Maine, so If you guys were in my position would you string the antenna oriented north/south or east/west? It looks like north/south would be good for DX contacts in Europe and here in the US. East/west might make it possible for over-the-poles and down to the southern US and Central/South America (I know, I'm being wildly optimistic here).



    Any thoughts?
     

  2. fourstringburn

    fourstringburn
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    If you have enough trees and space, I would do both.

    If I could only do 1, I would go east-west which would cover more towards Europe and westward towards Asia and Oceania when the bands are good. Going over the poles isn't supposed to be as reliable from what I've been told.

    You already have a short path to Europe from your location, but contacts to South America and Africa may be limited. It doesn't mean you cant work them, it's just tougher if the bands aren't too good because that'll be the weaker lobe from a east-west antenna position.
     
  3. tba02

    tba02
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    How high will it be? That will impact the radiation pattern.
    I'd look at a NNW-SSE configuration myself.
     
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  4. Captain Kilowatt

    Captain Kilowatt
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    What bands do you want to cover (I assume all) and how high will it be? Dipoles that are low in terms of wavelength do not have much directivity if any at all and long dipoles such as 140 feet will exhibit weird multilobe patterns when operated on much higher bands like 17m and up. That high and the pattern becomes more aligned with the direction the wire runs and not broadside to the wire like it would on the lower bands if it was high enough to make it directional.
     
  5. fourstringburn

    fourstringburn
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    Being he's in Maine, wouldn't a East/West antenna be better at the location?
     
  6. tba02

    tba02
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    #6 tba02, Feb 13, 2018 at 3:45 PM
    Last edited: Feb 13, 2018 at 5:42 PM
  7. Tallman

    Tallman
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    tba, I like how you bring the school with you.
     
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  8. ShadeTreeMechanic

    ShadeTreeMechanic
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    I would like this twice if I could. This is pure gold.
     
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  9. StrangeBrew

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    Google "turnstile antenna" for another possible option.
     
  10. Keith Thompson

    Keith Thompson
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    The antenna is a Cobra UltraLite Senior 140' dipole with a ladder line feeder. It's rated for 160 to 10 meters. The trees around my house basically allow me to choose pretty much N/S or E/W. The house will interfere with a diagonal and I don't want to go over the house so I can have the option of lowering the antenna in high winds.

    I'm having a tree climber come over to rig a block and tackle in each tree. I'm guessing he'll be able to get it at least 30' high, perhaps as high as 50'.
     
  11. tba02

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    Oh damn, you just made that awesome!

    Make sure he puts one in all four trees!

    I would have to more specific research on the characteristics of that antenna (sorry), but a quick check shows it should be similar to a dipole. Assuming that is the case, and with the solar cycle favoring 20-160m, I would go N/S for the slight US/EU coverage you might get on 20/40

    BUT - if you do all 4 trees you can test/change which is (for me) part of the fun.
     
  12. Captain Kilowatt

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    With the antenna oriented along a N/S line it will cover pretty much everything from the northeast to the southeast and from the southwest to the northwest pretty much evenly. This allows coverage of Europe, Middle East and all of Africa as well as all the USA, eastern Australia and a large portion of the Pacific.
     
  13. fourstringburn

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    I should clarify that I meant broadside east/west.
     

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