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PVC J-Pole Antennae for 2m

Discussion in 'General Technical Questions and Answers' started by KE5YIZ, Feb 23, 2009.

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  1. KE5YIZ

    KE5YIZ Ham Member QRZ Page

    I'm a new ham operator and am getting ready to make a J-pole ant for my house and can't seem to find any exact plans online for making one. If there is anyone out there that can send me some plain language and detailed plans on how to build one please let me know.

    Thank ya'll for your time.


    73's Robert, KE5YIZ
     
  2. WJ5O

    WJ5O Ham Member QRZ Page

    J pole antenna for 2 meters

    Robert,
    Welcome to the world of Amateur Radio... where "homebrew" construction is half the fun of a fascinating hobby.
    I've never seen a J pole constructed using PVC pipe....although, certainly possible to make the structure of PVC and have a wire J pole configuration on the inside.
    Most J poles are constructed using copper pipe..... available at local home improvement stores such as Lowes or Home Depot......... I'm surprised that a "Google" search didn't turn up any plans....the internet is full of them.
    I don't have a ready reference....but, I'll get back with an edit to indicate a URL.

    http://www.dxzone.com/catalog/Antennas/J-Pole/
     
    Last edited: Feb 23, 2009
  3. W1BAN

    W1BAN Ham Member QRZ Page

    I guess you are looking for a 2 meter antenna? Also what are you going to use the pvc for?
     
  4. KI4ZJI

    KI4ZJI Ham Member QRZ Page

    I actually made a j-pole out of 300ohm wire and put it on a dowel in PVC pipe. It seemed to work ok, but was narrow banded.

    Given the cost of copper pipe these days, I would recommend using galvanized conduit (1/2" or so).

    My best performing 2m antenna (aside from a beam) is a J-Pole made from conduit. It is up about 35', fed with 1/2" hard line from a Yaesu FT-3000m (70 watts) and I have worked 2m FM simplex stations as far away as 90+ miles - from Shelby NC to Leesville, SC (and neither of us are on mountains).

    If you put the JPole together correctly, it should give you some decent gain.

    Things I have learned:
    • Invest in decent feedline - decent feedline cannot be found at radio shack
    • Spend more time, effort and money in your antenna and feedline than you spend on your radio.
    • Radio Shack does not sell feedline - they sell very long, flexible dummy-loads that come coiled up in a package.
     
  5. KM5FL

    KM5FL Ham Member QRZ Page


    Follow this link to Arrow Antennas. http://www.arrowantennas.com/ When you get there, you will find "Instruction steets" listed in the navigation bar. Click on it, and when the page opens, scroll down to J-Pole antennas. Click on OSJ-146/440. It's a dual band J-Pole for 2M/70Cm.. Except for the feedline, everything you need to build it can be found at your local home improvement center and Radio Shack..


    KM5FL
     
    Last edited: Feb 23, 2009
  6. WA8FOZ

    WA8FOZ Premium Subscriber QRZ Page

    See the March 2009 QST!
     
  7. AK7EE

    AK7EE Ham Member QRZ Page

    The March QST Magazine has instructions on how to do I think you're trying to do.
    Here's a web site that shows how to make a 2 meter J-Pole using 450 ladder line. Put the ladder line j-pole inside a piece of pvc pipe.

    http://home.comcast.net/~buck0/ll_coolj.html

    You can also do a google search for 450 ohm lead j-pole or 300 ohm twin lead j-pole


    That should get you started.
     
    Last edited: Feb 23, 2009
  8. N1RKW

    N1RKW Ham Member QRZ Page

  9. KF4KNF

    KF4KNF Ham Member QRZ Page

    While your building a j-pole you might consider just making it collinear. It adds a few feet to the height of the antenna but gives you a few dB gain over the basic designs you often see. Here is some instructions on how to do this-

    http://home.comcast.net/~buck0/5-8thx2j.htm

    I would highly recommend you take weather into consideration before you attempt this. If you have high winds this might not be the best idea...
     
  10. AC9NO

    AC9NO Ham Member QRZ Page

    plans for freestanding J Pole made with PVC

    pg 44 of the March '09 QST. A freestanding J Pole antenna made with PVC
     
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