YO is still available from K6STI. I bought a new copy in 2005, v7.65.
It is an amazing piece of software. I've built 3 yagi's with it.
73 es gl,
> From the YO file for the KLM620:
> "See NICE5.YAG and NICE6.YAG for single-driven
> designs with superior performance on the same
> boomlength." (These are two other models in YO).
> I attempted to copy the .PCX output plots for all 3
> but something in XP is preventing me from doing that.
> Also remember YO can also substantially improve the
> stock KLM designe (like I did for the KLM610).
> Hopefully you can find someone locally who
> has a copy. You might try asking on Towertalk. YO
> also allows optimizing two antennas in a stacked
> 73, Bill W4ZV
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