I made an linked inverted v for 40/20/15 (before I realised I could use the 3rd harmonic of 40 on 15!) out of 19AWG PVC coated wire. 15 and 20 work fine - I did my first parks activation on those bands and it was a blast. My Anderson powerpole crimp failed so I couldn't try it on 40. This weekend, I took it to the park to tune it. I hung the centre connector with a 1:1 balun through a bit of rope through a tree (probably 12 feet high), fed it with a handy 12M length of RG58 coax and swept it with my nanoVNA. It seemed resonant at 6.5MHz and around 20MHz. I trimmed about six inches off, equal on both sides. No change. Trimmed some more. Another six inches. No change. At this point, I got a little worried. I didn't want to keep trimming if there was obviously nothing happening as the dipole was getting shorter and shorter. I've measured it again now: Banana plug to first link - 5.35 metres First link to second link - 1.570 M Second link to insulator - 3.2M Can anyone help me understand why this inverted v antenna appears 'stuck' and won't tune?