Marconi's model of the I-10K to specs modified.
Well Bob, I finished with my Sunday School project sooner than expected, so I got back to the I-10K model. I haven't quite got there yet, but my idea is showing some promise. Maybe I'll have some proof if I can tweak the model and get it a little closer.
The big problem may be that the antenna is asymmetrical in the ground plane and the matcher, so maybe Eznec will never produce a match on the money, but it's far closer now than with any of my other 5/8 wave models, including my model of the Cebik 5/8 where I duplicated his matching results perfectly.
In measuring the antenna I found other miscue's in the dimensions, which I ignored in the model and I made a couple that I have not fixed yet...at the ends of T1 and T2. I also didn't try to set the radials askew, off-center of the antenna as they really are, so that is at work also. I used my own tuning dimensions for T1,T2, and V7, at 27.205 mhz. As I said earlier, I also didn't taper the radiator, and that will also make some difference.
In the attached PDF file I included my model of Cebik's 5/8 for comparison of the matching results only, so you can see how the match differs from a similar 5/8 wave antenna with no matcher. I think this is just like I said in my email, and I expect it to get even better when I have a chance to fine tune and fix the errors I see.
[ATTACH]5740[/ATTACH]
