If you look under DX Gallery link above and click on my name, in there is an album called "Does resonance show max gain?" This has the images that were used in the initial post of this thread. Back when I posted it, I was able to link the images in an album on this forum directly into a post. Unfortunately, those old links no longer connect, it happened during a forum update a while back which changed it to directly inserting the images used into the post.
Also, Harry. What you mentioned about antenna length overall is true, however, I think in this case there is an issue of scale. When it comes to tuning antennas, we do not changing between 1/4, 1/2 and 5/8 wavelengths in length, instead we use very small, fractios of a wavelength. A lot of instructions that comes with antennas talk about making cuts of 1/8 of an inch or less when tuning. What fraction of a wavelength is that at 27MHz? It is true that there will be very small (essentially at an insignificant level) changes in the antenna's radiation pattern, so sure, it will play a part here, but it will be a very small to insignificant part as other aspects (and variables) of and related to the antenna are changing much faster.
This is more related to something Freecell said on this forum in the past but I'm not going to fish out that quote.
I've actually been experimenting with my tunes again recently (since covid). I took a spectrum analyzer (the kind that plugs into the computer) and stream the output online using twitch. I then use a laptop connected to a mobile internet connection to read that data on-site. This allows me to test a mobile tune in multiple locations in various directions. Long story short, what I have found is at least for local communications, it seems that the tune I described above using a second antenna attached to my nano-vna's second port as measured 100 feet away is confirmed for mobile measurements as tested from various locations and directions between 5 and 20 miles away from the shack.
Again, as I essentially posted above, this is just me being picky and pushing my knowledge. You won't notice the difference between this tune and tuning using SWR or resonance. There just isn't enough of a difference in output between said tunes to make any real difference...
The idea was inspired by an observation I made from a heated debate that has since been resolved between two other members of this forum, Marconi and Shockwave. I noticed after the fact that they were using two very different ways of measuring data to support their arguments. So thanks to both of you as various realizations from said debate from years ago are still bringing ideas to me, even if I'm not using the antenna in question...
The DB
