I built this as soon as it came out in QST but my SWR maxed out my little meter at my repeater frequency. When I finally got it on an antenna analyzer, my resonate frequency was 155! 1.2 SWR Since my cube was already too small, I cut 1/2" off each of the 8" legs to see how much "movement" I would get. 3MHz - in the wrong direction (of course). I rebuilt it today by lengthening the 8" pieces to 8.5" and lengthening the 8.5" pieces to 9.5". It resonated at 139-140, 1.1 SWR. I also honed out the T's so they could be adjusted (files and sandpaper). By moving the feed point T's to where there was a 1" gap between the edge of the T and the edge of the 90, my resonant frequency is 146.5 with a SWR of 1.0.
I hope this helps someone out there like the comments already posted helped me. |
