In the true spirit of this page, i installed a poorly built antenna on the weekend, and I don’t know why?
I got the courage to cut my unicorn blood DX wire, and began the process of making a link dipole. Followed the guides form all the normal places, VK3ZPF and VK3PF and the Sotabeams Calculator among many. I built up the antenna, followed the instructions and started with the 20m bit first and its miles off, I adjusted and trimmed and checked and no luck.
VSWR no better than 1.7:1, and more of a worry, impedance is ~75ohms.
I made the links with anderson power pole quick connectors and the insulator is two pieces of light core flute stuck together for strength.
I connected the longer bits of wire and have built a wonderful 40m dipole, at 7090Khz, its 1.03:1 and impedance is ~50ohms. on my Sark. But on 20m? Whats going on? (the pics above show you the sark results)
I used the home made 1:1 current balun I made the other week, this measures fine and appears to work well in other usage. but on this new antenna, at 14Mhz, no luck?
Things I need to do myself to self resolve this include direct connecting the coax to the wire (remove my Balun). Try another location, i was in the park, but away from “stuff” no more cluttered than any sota summit? try different wire?
So, does anyone have any tips, ideas of pointers to what Ive done wrong and what my issue may be? Sure I can tune around the problem with my Elecraft T1, but thats not the idea of building a resonate antenna.