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Wednesday, January 30, 2013

10 meter Jpole results!

I built a 10 meter Jpole the other day from ladder-line and some 16 gauge wire. I had a spare piece of coax so i directly attached it to the Jpole and then trimmed until I got a decent SWR. It still needs a little tuning but here is the first test run! Most of the band was 1:1 at 20 watts until higher in the band. Antenna is a little long I guess. Time for a trim

 The Picture on bottom is the way I hooked up the feedpoint!
I always change things around and do odd tests of all types just for fun. So don't get bent out of shape if it looks like i made a huge mistake. I do horrid things to my antennas in the name of science all the time. I will post all of my measurements and data asap,hopefully before the weekend! Below is the basic data so far.                             FREQ      SWR     POWER  
28.005     1.2        20W
28040       1.2       20W
28.1          1.1       20W
28.15        1.1       20W
28.2          1.1       20W
28.3          1.4       100W
28.4          1.2       100W
28.5          1.3       100W
28.6          1.4       100W
28.7          1.4        100W
29.0          1.6        100W
29.5          2.0        100W
Over all it was really simple took no real skill other than basic soldering and cost zero dollars since i had a scrap ladder line and some wire on hand, Even the coax was in the trash box! 
total build time was around 15 min. 

On the AIR!
After I got home from my job at the local  "create issues from no problems office" I decided to crank up the 746 and see how my antenna would decide to work. I called CQ on 28.400 and Immediately wb2eod came back with a s5 report. Not bad for the first try! In a little while I will take measurements and retune the antenna for the final test. After that back to the drawing board for the second phase! Rework the Jpole for 1000 watts!


  1. Did you put a choke balun at the antenna end to block stray RF?

    I'd be interested in a follow-up with your on-air results with this.

  2. I did put a choke on it but I believe if I redesign the choke it will net better results with the SWR. I want to get it a little more resonate before I add any destructions to the Post. By tonight I should have the data I want and the results I wanted!