1. In celebration of the launch of the new redesigned site, we just gave away a FREE antenna! Click Here to See Who Won!

Dipole Direction

Discussion in 'CB Antennas' started by MrKenmore, Dec 21, 2013.

  1. MrKenmore

    MrKenmore New Member

    Joined:
    Dec 4, 2013
    Messages:
    4
    Likes Received:
    1
    Hi everyone. I am new to the forum and excited to be a part of DXing. I just passed my general and technician test but right now I am playing around with a cobra 2000 gtl on 38 LSB. I will be putting up a dipole antenna cut to this frequency. I would like to know how to figure out the best direction to orientate it. Is there a program or website where it give degree headings based on your location depending on where you would like to orientate it? I am on Long Island NY. Any suggestions would be great. I am currently using an Antron A99. That's very much.


    Sent from my iPad using Tapatalk


    #1

  2. HomerBB

    HomerBB Well-Known Member

    Joined:
    Jan 4, 2009
    Messages:
    2,484
    Likes Received:
    397
    If you are going to run the antenna above 1/2 wavelength height where it will truly begin to have significant directionality then it will be best to point the two ends of the dipole 90 degrees away from where you want to talk.
    For instance, if you want to talk west toward the mainland and east toward Europe it would be good to have the two ends of the dipole pointed more or less north and south.
    If you are mounting lower than 1/2 wavelength high, it will not be so critical which way you orient it.
    Until you get the dipole a good bit higher than that, wavelength or more, exact orientation will not be so critical.
    This applies to horizontally mounted dipoles, and represents a rule of thumb.

    This applies only as long as someone with bigger words in their answer doesn't convince you to believe otherwise. ;)
    #2
  3. wavrider

    wavrider W9WDX Amateur Radio Club Member

    Joined:
    Jun 2, 2009
    Messages:
    2,069
    Likes Received:
    304
    Last edited: Dec 22, 2013
    #3
  4. W5LZ

    W5LZ Crotchety Old Bastard

    Joined:
    Apr 8, 2005
    Messages:
    6,834
    Likes Received:
    725
    Another part of all this is that while both posts so far have been accurate, they are only accurate in the circumstances prevailing at the time (especially with any modeling program). That means that certain heights related to wave length for the frequency in question are 'better' than others. BUT, it still depends on how/where the antenna is located in each specific instance. You gotta try it... see how it does, then change it to see which way to go in each particular case to make it 'better', you know?
    A pretty good rule of thumb is shoot for at least 1/5 wave length above ground. Then you get to figure out what's going to be ->practical<- for you. I'd love to have an 80 meter antenna at 60+ feet, but it's not gonna happen where I live...
    - 'Doc
    #4
    1 person likes this.
  5. Captain Kilowatt

    Captain Kilowatt Professional Amateur Staff Member

    Joined:
    Apr 6, 2005
    Messages:
    11,044
    Likes Received:
    2,684

    Since you passed your general test it's time to get on the ham bands. You will see a HUGE difference in ability to DX than you will ever see on CB channel 38. 20m is a killer for DXing.

    As for orientation of a dipole, unless you get it up a full wavelength (about 35 feet on CB) it won't be very directional anyway so don't worry too much.
    #5
    2 people like this.
  6. w9cll

    w9cll W9WDX Amateur Radio Club Member

    Joined:
    Jan 19, 2013
    Messages:
    1,686
    Likes Received:
    599
    Got that right..
    #6
  7. M0GVZ

    M0GVZ Well-Known Member

    Joined:
    Oct 18, 2011
    Messages:
    637
    Likes Received:
    192
    Get yourself a proper HF rig and get on the amateur bands. Being able to get to Europe on 10/15/20m is a daily occurrence at this time of year. 20m to Europe is a daily occurrence all year round. The UK from the USA is effectively "local".

    10m band is wide open to the USA around 13:00 UTC closing here around 17:00 UTC when the sun goes down which I believe is around 8am to noon or so your local time.
    #7
  8. MrKenmore

    MrKenmore New Member

    Joined:
    Dec 4, 2013
    Messages:
    4
    Likes Received:
    1
    Thanks so much for all the responses! The horizontal plan for mounting that I cam up with was to install two eye hooks with pulleys between two trees (trees are about 40 feet apart). Dacron rope would be strung between the two. One end would have a weight so the trees could move without stressing the line. There would be enough slack so you could lower the rope and modify or replace the antenna which could be secured to the rope.

    I will keep everyone posted. Thanks again for all the tips! Great link wavrider.
    #8
  9. wavrider

    wavrider W9WDX Amateur Radio Club Member

    Joined:
    Jun 2, 2009
    Messages:
    2,069
    Likes Received:
    304
    Fan Dipole,

    Multiband dipole

    Ggoogle any of them and see what you think.

    Keep in mind you will need to have the antenna in an inverted V configuration for best impedance match.

    Some ops say a true horizontal antenna works best, others say the inverted V works best.

    I tried them both, they both work well.
    #9
  10. W5LZ

    W5LZ Crotchety Old Bastard

    Joined:
    Apr 8, 2005
    Messages:
    6,834
    Likes Received:
    725
    Sounds like it should work. How high can you suspend your antenna in those two trees, and are they more or less N-S or E-W?
    That 40 feet apart thingy means you will be able to hang a 20 meter dipole antenna and higher in frequency. That should certainly get you 'hooked'...
    - 'Doc
    #10


Share This Page