[Towertalk] Re: YO 7.5 etc.

[Jiri Sanda]

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

KI7WX@aol.com wrote:

> Below is the e-mail blurb Brian sends out for YO-PRO 7.5, the current cost and his contact information for folks looking to purchase the program. Standard commercial disclaimers apply. I just happen to have the info on hand.
> 
> Mark
> KI7WX
> 
>    YO-Pro 7.5 Yagi Optimizer
> 
> 
> * Stochastic global optimizer
> 
>     Ferrets out unexpected designs hidden in far
>     reaches of the performance space, can profit
>     from millions of Yagi evaluations.
> 
> * Enhanced local optimizer
> 
>     Refined conjugate-gradient algorithm smoothly
>     and rapidly climbs performance peaks.
> 
> * Frequency weighting and five optimization frequencies
> 
>     Help flatten response over the desired passband.
> 
> * Improved optimization of dual-driven designs
> 
>     Model Yagis with up to 70 elements to 10 GHz.
>     
> * Improved accuracy throughout
> 
>     Recalibrated to NEC, new gamma, T, and hairpin
>     models, tighter mounting bracket characterization.
> 
> *  Ideal match facilitates optimization
> 
>     Eliminates SWR iterations, speeds calculation 25%,
>     and reveals inherent impedance-bandwidth properties.
> 
> * Calculates boom correction
> 
>     Insulated or noninsulated elements, Hy-Gain clamps,
>     custom correction for your particular construction.
> 
> * Yagi file saves entire design
> 
>     Save matching network parameters, mounting bracket
>     dimensions, tapered boom diameters, and everything else.
> 
> * Undo and redo all design changes
> 
>     Everything from balun-lead length to conductor material
>     can be tweaked, evaluated, and instantly undone.
> 
> * Single-keystroke NEC verify
> 
>     Invoke 2000-segment NEC analysis in YO that
>     transparently substitutes NEC results and patterns.
> 
> * Pentium optimization
> 
>     Optimized, hand-coded assembly language with pipelined
>     floating-point code yields thousands of Yagi iterations
>     per second on modest computers.
> 
> * Thoroughly revised and updated
> 
>     Scrutinized, revitalized, modernized, sanitized.
>     
> * Includes compatible NEC/Yagis 3.0
> 
>     Use within YO or alone to model huge arrays of Yagis,
>     uses extended memory instead of hard disk.
> 
> * $300, single-seat license
> 
>     Includes over 150 Yagi models and extensive documentation.
>     Payment by U.S. check or money order.  Delivery by e-mail.
> 
> 
>                    Brian Beezley
>                    3532 Linda Vista Dr.
>                    San Marcos, CA 92069
>                    k6sti@n2.net
> 
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