Re: Multi ele vertical beams

NEC will give you a fair approximation, but it won't be cut to size and just use, the ground will make a big difference, so what would you use for the model?

It will also affect the feed impedance, so some sort of matching, or adjustments might be needed.

There would probably be little point in initially modelling so many elements until the first 3 or 4 had been built and tuned.

And then I doubt if extra would give you much return for the money and effort.

It does take quite a long time to model even what seems like a simple antenna, and optimise it for the parameters you want.

I have had great success with Yagis dual band single feed Yagis and some other verticals, and most times the perform exactly as calculated.

I would not offer to model yours, as I have no way of checking the results (unless I build one in the street), so any questions afterwards would not be able to be answered.

However, it would take an average person much less time to learn enough of the programme to do it, than it would for some one to actually model it. The only manual calculations you

may need are to work out angles and sides of a triangle, so if you know the meaning of SOHCAHTOA you're away

Give it a go, you won't regret it