I enjoyed seeing your SWR graphs. I plotted my own graph with an old MFJ analyzer but only for 10-80. I recall you posted something earlier about UNUN construction for EFHW and I followed your winding method. I suspect I also got lucky to the extent my wire is high up in open space (80') and fairly straight including the counterpoise which is 23 feet long. It may even qualify as an OCF dipole but it works better than I ever expected. Thanks for posting. n2eye
Wait, isn’t there a Ham YTber law that says hide the full SWR sweep so people remain impressed about how you may or may not have nailed the SWR on just one frequency?? You rebel! Well done. BTW some wet/dry ultra fine sandpaper used wet takes the sharp edges off that toroid easily… allows for even tighter winding without fear of drag scraping an inner bend. 800grit or higher.
Then there are the ones who do show the sweep and they have so much loss it stays below 2:1 VSWR for pretty much the whole graph, some Connecticut wannabee cowboy will tell them something like "looks good, has got good SWAAAARRRRRR". An antenna one step above a dummy load!
@@evil_lair_electronics Absolutely. Hams worldwide need to listen in earnest to what you are saying. Someone asked me why I made the choices I made in winding and toroid... The answer I will e-mail him is a link to your videos. You inspired me. Thank you.
@@Aimsport-video Thank you, very kind of you, I really appreciate that. All I ever wanted was for hams to think for themselves, learn to experiment and measure things, which leads to more in depth understanding, instead of just following along like sheep.
So these antennas are probably not a good choice for qro contesting? 1kw. I have a myantennas 10-80hp for a backup antenna but have never conducted a rbn test vs the loop or coaxial dipole on 80m. Thanks for the tips.
What core are you using? And how is the capacitor wired? How many turns are you using for the inductor to bring 12 meters in? I know lots of questions but I like your approach.
Keep in mind copies will never be tuned the same from one environment to another, all these items may need to be different to some degree to achieve optimal tuning, there are no cookie cutter combinations. For the transformer I used 2643251002 ferrite, 2T/14T 16ga magnet wire, with a 100pf TDK CC45 series capacitor. The capacitor in the center of the antenna wire is a TDK 150pf CC45 series. The inductor was 11 turns of the insulated 18ga antenna wire coiled on a 33mm PVC form located 2.5m from the transformer.
