"Wes Stewart" wrote in message
...
On Sun, 07 Nov 2004 04:31:00 GMT, "Frank"
wrote:


Hi Frank,

|Thanks for your comments Reg. The fact is my graph is produced in Excel
......
|...........validity of my results -- or the validity of the code.

I haven't run your code, but I did something similar, and announced
the results here, almost a year ago. Perhaps that explains the lack of
response.

http://www.qsl.net/n7ws/Loaded%20antennas.htm

or in downloadable form:

http://www.qsl.net/n7ws/Loaded_Antennas.pdf

the antenna files are he

http://www.qsl.net/n7ws/AntennaModels.zip

Regards,

Wes

Thanks for the information Wes. I have only recently noticed the loading
coil discussions going on, so guess I missed a lot of the earlier postings.
Your curves are very similar to mine, although I plotted only those currents
within the loading coil, that are spaced by the winding separation (Which
happens to be the same as the overall segmentation). The far field is
proportional to the portion of the current (within the helix) in the "z"
direction, and assume that the x and y components are cancelled out. Such
plotting seems to be supported by computing the integral of I(z)dz -- while
realizing the limitation of such expressions.

I just tried to run your EZNEC files, but cannot since I only have the demo
program. Will have to figure out a way to extract the NEC code.

The qsl.net site is incredibly slow, I had to make a couple of attempts to
download your files.

Regards,

Frank