One year at Visalia I was chatting with Mike (the M in KLM), and remarked that
the KT34 was one of the few pre-CAD tribanders that still delivered on its
promises. I asked him how he did that. "Lot's of trips up and down the tower."
> On Mar 31, 2026, at 9:47 AM, Brian Beezley <k6sti@att.net> wrote:
>
> NI0K said:
>
> "I've been 'recommending' to hams that they should, if possible, buy a
> Yagi of computer aided design. Roger Cox did this at Hy-gain and I
> believe his are the oldest computer-aided design Yagis."
>
> I licensed Yagi optimization software to both Hy-Gain and M-Squared Antennas
> in the 1990s. I believe Mike Staal at M2 got it before Roger Cox at Hy-Gain.
> But before that, Dr. James Lawson, W2PV, a physicist, wrote "Yagi Antenna
> Design," a book published by the ARRL in 1986. His FORTRAN program did not
> employ automatic optimization. I'm sure hams home-brewed some of the designs,
> but I don't know if any were offered commercially.
>
> As long as we're on Yagi history, Mike Staal seems to be the first to
> introduce the close-spaced director characteristic of what are now called OWA
> designs. Mike regarded the technique as proprietary and kept quiet about it.
>
> Here is a link to "A Secret Story About the Yagi Antenna," published by the
> IEEE. I loved the part about Uda arriving in San Francisco after the WW II.
> His reaction at seeing all the TV Yagis on homes is delightful.
>
> https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=88216
>
> Brian
>
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