1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

Dipole antennas ?..

Discussion in 'Amateur Radio Antennas' started by Oatmeal, Sep 13, 2019 at 9:29 AM.

  1. Oatmeal

    Oatmeal Active Member

    Joined:
    Mar 22, 2009
    Messages:
    460
    Likes Received:
    56
    Good morning, what kinda dipole antenna you all using and how high is it ?
    Right now, I'm running a end fed which is 50ft off the ground, does ok...


     

  2. sp5it

    sp5it Master of puppets

    Joined:
    Jul 9, 2009
    Messages:
    1,194
    Likes Received:
    790
    End fed is not a dipole.
    Dipoles should be placed at least 1/2 wave over the ground.
    Mike
     
    Captain Kilowatt likes this.
  3. BJ radionut

    BJ radionut Supporting Member and 6m addict

    Joined:
    May 9, 2008
    Messages:
    2,317
    Likes Received:
    1,651
    Oatmeal: I am running a pair of "Phased" Doublets presently.
    The Doublet is basically a Dipole variant, instead of fed with coax it is fed with 300/450/600 Ohm twin-lead. The antenna is about 45-50 ft at the Apex with the ends 25-35 feet above the ground. I have been using this variation for about 7 or 8 years now.
    I have run a single Doublet antenna also. I have found them to be an effective All-Band antenna.
    I have used them in length from 326 and 260 feet overall length for 160 thru 15 meters, and 124 feet for 80 thru 15 meters.
    I have always used an outboard manual tuner to feed with.
    I have had the best performance when tuned with a Double " L" (homebrew or presently PALSTAR BT1500A) or also the Link Coupled tuner (Johnson Matchbox). I also have used a DENTRON MT2000 or 3000 with a built-in 4:1 balun.
    These all have worked well, it takes practice and a little experimenting with feedline length to get all bands on the tuners with the built-in baluns, however finding the "sweet spot" for all bands just take time and practice.
    The Twinlead or Ladder line, whether 300/450 or 600 Ohm is brought Directly to the tuner. This eliminates the high loss from coax when being used at VSWR greater than 2.5:1 which can occur with any multi-band antenna fed with coax.
    Many here on the forum have run a similar version, or presently running this type.
    They are hard to beat!

    http://ftp.unpad.ac.id/orari/librar...ant/docs/Introducing the All-Band Doublet.htm

    http://ai4ji.com/Projects/antennas/doublet.htm

    This my variant.
    [​IMG]
    124 feet overall with 34 ft spacing. I love it! It's a killer!:LOL:
    I'll explain later if you are interested.
    All the Best
    Gary
     
  4. Riverman

    Riverman Part-time Member

    Joined:
    Nov 12, 2013
    Messages:
    1,789
    Likes Received:
    1,230
    20 meter dipole. 14 guage wire with 1:1 balun. Inverted V. Highest point is 18'. Ends are at 6'.
    SWR:
    1.3 @ 14.150
    1.1 @ 14.250
    1.2 @ 14.350
    Works great. (y)
     
    Shadetree Mechanic likes this.
  5. Rob_MA

    Rob_MA Active Member

    Joined:
    Jan 1, 2016
    Messages:
    30
    Likes Received:
    32
  6. w9cll

    w9cll W9WDX Amateur Radio Club Member

    Joined:
    Jan 19, 2013
    Messages:
    3,736
    Likes Received:
    2,648
    I am running a fan dipole with wires for 17, 20 and 40, I load 15 on the 40 meter wire and use a tuner for everything else. I have it hanging in a V about 30 feet up.
     
  7. Woody-202

    Woody-202 Active Member

    Joined:
    Sep 5, 2018
    Messages:
    37
    Likes Received:
    34
    I had a 15m dipole strung up in my Garage. I would open up the garage door and use it like that. I was surprised at how well it worked only 10' from the floor. I've since moved to an indoor-second-floor MLA .
     
    Riverman and binrat like this.
  8. binrat

    binrat WDX Club Coordinator
    Staff Member

    Joined:
    Nov 5, 2008
    Messages:
    2,137
    Likes Received:
    829
    I used inverted vee 20 and sometime a trapped 20/40 portable all the tme. Most often with 30(ish) watts. Constantly manage the minimum of 4 contacts each time out. Here is from Aug 2017 antenna setup and a map of contacts.The mast is a avi probe that is about 8'6" and with this time 10 watts. windy peak hf antenna.jpg windy 2017.png
     
    #8 binrat, Sep 13, 2019 at 4:21 PM
    Last edited: Sep 14, 2019 at 1:32 PM
    Riverman likes this.
  9. Mudfoot

    Mudfoot Sr. Member

    Joined:
    Jun 17, 2009
    Messages:
    9,106
    Likes Received:
    3,528
    10, 15, 20 Fan dipole @ 30'
    40/80 trapped at 30'
     
    #9 Mudfoot, Sep 13, 2019 at 10:29 PM
    Last edited: Sep 14, 2019 at 4:08 AM
    Riverman, w9cll and binrat like this.

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!