View Single Post
  #4   Report Post  
Old July 25th 03, 11:40 AM
 
Posts: n/a
Default

oSaddam (Yuri Blanarovich) wrote in message ...
Arie,
One more thing comes to mind, it would be desirable to be able to use insulated
wires in models. Typically house electrical insulated wire has about 5%
shortening coefficient. I think it would suffice to enter the shortening
coefficient (can be obtained by measurement).


Nice suggestion. However I did not write my own nec-2 core, just used
the existing nec-2 sources and changed it a bit to integrate the nec-2
calculations and the sommerfeld ground calc's.

However there is another freeware program available which uses the
nec-2 and for which it is possible to specify insulated wires. From my
memory, I think I saw this on Ray Andersons 'unofficial nec' pages.

I believe NEC4 can accomodate
that and could serve as an example how to do it.


One of my great wishes would be nec-4 becoming (public) available for
none american citizens. However I am already waiting for it some four
or five years, and I have no indications this will change soon.

Also different material for elements within antenna, like copper (insulated)
wire quad and aluminum Yagi elements.


4nec2 makes is possible to use almost any nec2 card. So there is no
provblem specifying different materials for different parts of the
antenne or for the antenna as a whole. When using the CAD style
geometry editor, one has predefined list-boxes available with common
materials.

That's it besides transducer for the brain to "see" the design in my head and
optimize/model it in 3D :-)


During optimization you can see the 3D model change, as it is updated
every iteration (if this is the right english word for it..).

Arie.