I don't recall what specifically I used for the overall length, and I don't recall where I got it from, I want to say the imax exposed article that has been floating around the web since long before that, but am not sure.
I think I would disagree with this, as its not the % of overall length that seems to matter, but where the capacitor is when it comes to the antenna's voltage/current distribution.
Its been a while but I recall the location being very specific, to the point that I first thought it was odd, move the capacitor to far away from this point in either direction and I couldn't get it to work, even when adjusting the values of the capacitor. Even the value of the capacor, within reason, didn't seem to have nearly as much of an effect as the location of said capacitor.
The important part (again pulling from memory from what, six years ago?) is to get the capacitor in the right place on the voltage and current curves, which would be measured from the tip.
I want to say that the models from back then showed a feed point impedance that I would expect to see on an end fed half wavelength antenna, so a matching circuit that is either the same or similar to the a99's matching circuit should essentially have a similar effect, at least within reason, which is why I think they included said capacitor in the first place, although this is just speculation on my part.
I was wondering what happened in your absence. Take care. I've had covid myself recently, a mild case of Omnicron, and it was still rough for at least a few days, I can't imagine how bad it would be if I had a severe case...
On the plus side, when it comes to your modeling, I believe I read somewhere recently that the EZnec program was going to end development this year sometime and go completely free, even for the pricier versions out there, so look into that. Development is also going to be ending soon on the 4nec2 software that I use as well...
The DB
