FMUSER Wirless Transmit Video And Audio More Easier !

[email protected] WhatsApp +8615915959450
Language

    HAVE FUN DESIGN YOUR OWN J POLE FOR ANY BAND!

    HAVE FUN
    DESIGN YOUR OWN J POLE
    FOR ANY BAND! 
    (Try it with aluminum too!)
    Either way....TRY IT!
    Design your J Pole for hf,
    2 meters, 220, 440 and up!


      J-Pole Antenna Design 

    SAVE TIME BY USING THE CALCULATOR BELOW.
    NOTE: Coax center conductor attaches to the
     "Long section" feed point.
    Shield attaches to the short section feed point.


    Enter The Operating Frequency
    (use your mouse to clear the window then enter your frequency) 

       Freq MHz

     

    A (Long section) dimension is:  feet,    inches,      meters

    B (Short section) dimension is:  feet,    inches       meters

    C (Feed point) dimension is:       feet,    inches       meters

    D (Spacing) dimension is:           feet,   inches,     meters

    Inside (spacing) dimensions are metal to metal measurements, NOT center to center.

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     








    On most of the J Pole designs out there, a choke should be used as close to the feedpoint of the antenna as possible to help prevent rf on the feedline and creating difficulty with SWR readings. For 2 meters, the coil is 4 turns of coax at 5 inches in diameter. You should get good results with the choke within 3 or 4 inches of the feedpoint on 2 meters.

    Hint:
    Use the last part of your feedline as the choke before attaching to the feedpoint!


    Hints from builders:

    "Iv'e built my j-poles out of 10ft sticks of 1/2" emt conduit. Drill a 1/4" hole at the place where the "J" goes.  Make the "j"out of 1/4" soft copper,  Solder it in place thru the hole and add the cable. Cost about $6 using new parts.
    If you need a "super" j, use a piece of 3/4" pvc as the insulator and add the stub and another 38 or so inches of conduit. still really cheap"........
    Dave, WB5HDS

    Don't want to build but rather buy? Get a 2m/440 dual band J Pole from Amateur Radio Supply...click the picture below for more info!


    Click picture for more info!
    Made in the U.S.A. from solid aluminum! Very heavy duty and built to last!


     
    List all Question

    Nickname

    Email

    Questions

    Our other product:






      Enter email  to get a surprise

      fmuser.org

      es.fmuser.org
      it.fmuser.org
      fr.fmuser.org
      de.fmuser.org
      af.fmuser.org ->Afrikaans
      sq.fmuser.org ->Albanian
      ar.fmuser.org ->Arabic
      hy.fmuser.org ->Armenian
      az.fmuser.org ->Azerbaijani
      eu.fmuser.org ->Basque
      be.fmuser.org ->Belarusian
      bg.fmuser.org ->Bulgarian
      ca.fmuser.org ->Catalan
      zh-CN.fmuser.org ->Chinese (Simplified)
      zh-TW.fmuser.org ->Chinese (Traditional)
      hr.fmuser.org ->Croatian
      cs.fmuser.org ->Czech
      da.fmuser.org ->Danish
      nl.fmuser.org ->Dutch
      et.fmuser.org ->Estonian
      tl.fmuser.org ->Filipino
      fi.fmuser.org ->Finnish
      fr.fmuser.org ->French
      gl.fmuser.org ->Galician
      ka.fmuser.org ->Georgian
      de.fmuser.org ->German
      el.fmuser.org ->Greek
      ht.fmuser.org ->Haitian Creole
      iw.fmuser.org ->Hebrew
      hi.fmuser.org ->Hindi
      hu.fmuser.org ->Hungarian
      is.fmuser.org ->Icelandic
      id.fmuser.org ->Indonesian
      ga.fmuser.org ->Irish
      it.fmuser.org ->Italian
      ja.fmuser.org ->Japanese
      ko.fmuser.org ->Korean
      lv.fmuser.org ->Latvian
      lt.fmuser.org ->Lithuanian
      mk.fmuser.org ->Macedonian
      ms.fmuser.org ->Malay
      mt.fmuser.org ->Maltese
      no.fmuser.org ->Norwegian
      fa.fmuser.org ->Persian
      pl.fmuser.org ->Polish
      pt.fmuser.org ->Portuguese
      ro.fmuser.org ->Romanian
      ru.fmuser.org ->Russian
      sr.fmuser.org ->Serbian
      sk.fmuser.org ->Slovak
      sl.fmuser.org ->Slovenian
      es.fmuser.org ->Spanish
      sw.fmuser.org ->Swahili
      sv.fmuser.org ->Swedish
      th.fmuser.org ->Thai
      tr.fmuser.org ->Turkish
      uk.fmuser.org ->Ukrainian
      ur.fmuser.org ->Urdu
      vi.fmuser.org ->Vietnamese
      cy.fmuser.org ->Welsh
      yi.fmuser.org ->Yiddish

       
  •  

    FMUSER Wirless Transmit Video And Audio More Easier !

  • Contact

    Address:
    No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China 510620

    E-mail:
    [email protected]

    Tel / WhatApps:
    +8615915959450

  • Categories

  • Newsletter

    FIRST OR FULL NAME

    E-mail

  • paypal solution Moneygram Western UnionBank OF China
    E-mail:[email protected]   WhatsApp:+8615915959450   Skype:sky198710021 Chat with me
    Copyright 2006-2020 Powered By www.fmuser.org

    Contact Us