[Towertalk] Re: Re: YO 7.5 etc.

[Jan Erik Holm]

Yes, if YO canīt calculate the feedpoint impedance correctly
it will not calculate the currents in the elements correct either,
do I have to tell you what the outcome will be?
As I pointed out before, please be carefull out there when using
YO!!!

73 Jim SM2EKM

PS: I will be QRV SV9/SM2EKM from May 25, hope to work
you..
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Jiri Sanda wrote:

> It sounds interesting.
>
> I do find the user friendliness of YO 6.55 (I have here) superior over 
> any other similar SW known to me. Also the optimizer works nicely, 
> just it says your ant is for example 50 + 3j so excellent, when you 
> build it up and measure you obtain something like 68 -25j (or 30+25j 
> whatever). If you model the same thing with EM you get for instance 
> 67-24j. If you have a model in EM 50+0j build it and measure you have 
> 50 + - 3 + - 3j. If you model it with YO you get anything from 30 to 
> 60 Ohm +- 25j. I am not discussing gain, pattern and front back, since 
> those are things you can not measure easily exactly. The modeled 
> results of YO and EM are more-less the same. All is valid, of course, 
> only for antennas with close enough elements (D1 to Dr.) similar to 
> NW3Z from HF world or DJ9BV from VHF world designs.
>
> Jiri
> OK1RI
>