ad: dxeng

PVC J-Pole Antennae for 2m

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

Thread Status:
Not open for further replies.
ad: L-HROutlet
ad: l-assoc
ad: l-innov
ad: L-rfparts
ad: l-gcopper
ad: l-Waters
ad: l-rl
ad: L-Geochron
  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

    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.
    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. 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..

    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.

    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-

    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. KD8KRS

    KD8KRS 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
  11. K4EEZ

    K4EEZ Ham Member QRZ Page

    i have also made a pvc j-pole, it is up on my 28 ft tower and i use it for my pro 2053 scanner, it seams to cover the upper vhf/uhf bands just nicely

    i bought some 3/4 inch pvc 8 ft of it, that is uv rated, some time ago i got hold of some TV 300 ohm twin leed, that i stored in the garage, the J-pole is around 4 1/2 ft long from top to bottom, once i made my j-pole i made a small hole at the top of the j-pole on the twin leed, i pulled in some small gadge string in thru one end of the 3/4 inch pipe, then attached the string to my j-pole via the hole i made, tied it off after soldering my 50 ohm feed line to the bottom of the j-pole, i pulled the entire j-pole thru the pvc pipe

    once i got the j pole to where i needed it i put my end cap on the pvc pipe leaving the string that is attached to the j-polw 300 ohm twin leed,and tied a not and cut off the access close to the cap, i also used a reducer at the bottom end to let any moisture out and let the coax enter the pvc pipe
    thr 3/4 inch pvc is 6 ft long, so i knew i had enuff room to add the brackets to my home made antrnna cross strut bar, and simply u clamped it to the strut, on the other side of the strut bar, i have a Vhf Marine antenna clamped in the same way as the j-pole, both antennas are 8 ft apart on the sam strut bar that clamped to the lower 3rd section of the tower.

    SEE PIC:
    Last edited: Feb 23, 2009
  12. G4ILO

    G4ILO Ham Member QRZ Page

    This has to be one of the most useless articles I have ever seen published. Written by someone who was too clueless even to get PVC pipe big enough to fit the J-pole inside it. And the article doesn't even give any dimensions for the actual antenna! It should have been titled "How not to make a freestanding J Pole antenna."

    I made a Slim Jim out of 300 ohm flat twin yesterday.
  13. K4EEZ

    K4EEZ Ham Member QRZ Page

  14. KB0MLR

    KB0MLR Ham Member QRZ Page

    My first j-pole was a quick and dirty copper throw together that worked for me for years. I bet it's still on my old house even.

    The one I am working on now is called the copper cactus. I made it out of 3/4 copper pipe so should I decide to expand it to 440 and beyond, just pull the cap off the top and solder the next stack on top using a reducer and 1/2 inch pipe.
Thread Status:
Not open for further replies.

Share This Page

ad: PortRo-1