True about Uda being the chief developer. I’ve got his book. Generic reference naming came from Yagi being first at the patent office.
Rick Hiller W5RH *e-mail: [email protected] <[email protected]>* *Cell/VM/Text: 832-474-3713* *Physical: 9031 Troulon Drive* * Houston, TX 77036* On Thu, Oct 22, 2026 at 18:22 Stephen Flowers via BVARC <[email protected]> wrote: > Dan, > Agreed, the Yagi Uda animation you mentioned is outstanding! > > BTW, it seems that Shintaro Uda invented the antenna by and large. > Hidetsugu Yagi only played a minor role. Everyone knows of the antenna as > a Yagi or a Yagi-Uda so it seems like a sad twist of fate. > > Have a great rest of the week! > > 73, > Stephen (W2WF) > > > > On Oct 22, 2026, at 18:08, Daniel Poirot <[email protected]> wrote: > > > Steven! > > The Wikipedia page for the Yagi Uda antenna design is so cool! > > See: https://en.wikipedia.org/wiki/Yagi%E2%80%93Uda_antenna > > This GIF, when it is animated, is the best part: > > <image.png> > > > > On Thu, Oct 22, 2026 at 6:01 PM Stephen Flowers via BVARC <[email protected]> > wrote: > >> Colleagues, >> Good afternoon. I thought I’d report back on this morning’s experiment >> of focusing my 17’ Whip vertical antenna (20m) towards the northeastern >> US. These are two different POTA activations with different antenna >> configurations. >> >> The first map shows the contacts made 2 days ago from the day use area of >> SFA State Park using a 17’ Whip Vertical antenna and 6 radials. Power = >> 50W, Frequency = 14.0625 MHz, Transceiver = Yaesu FT-891, Coax = 15’ of RG >> 316, Mode = CW, Speed = 20wpm, Number of contacts = 44. >> >> <1015_US3058_POTA.jpeg> >> >> The second map shows the contacts made this morning from the same >> location, the day use area of SFA State Park. I used a 17’ Whip Vertical >> antenna and 6 radials PLUS a 18’ Reflector offset 10.5’ behind the >> radiating vertical, and a 16’ Director offset 10.5’ forward of the >> radiating vertical. Other parameters were the same as before, Power = 50W, >> Frequency = 14.0625 MHz, Transceiver = Yaesu FT-891, Coax = 15’ of RG 316, >> Mode = CW, Speed = 20wpm, Number of contacts = 44. * Azimuth angle of >> Reflector, Radiator, & Director = 55 degrees.* >> >> <1022_US3058_POTA.jpeg> >> >> In this picture of the array you can see the three vertical whips >> arranged in a row with 10.5’ spacing. Radials were put out for the >> Reflector and the driven element but not for the director, I haven’t made >> the radials for it yet. >> >> <Screenshot 2026-10-22 at 5.18.02 PM.png> >> >> The data for the two activations is the following (the yellow highlight >> shows the improvement of the vertical array): >> <Screenshot 2026-10-22 at 5.18.42 PM.png> >> <Screenshot 2026-10-22 at 5.19.20 PM.png> >> >> And when you look closer at the New York and New England contacts the >> data show this (the yellow highlight is showing an even greater >> improvement): >> <Screenshot 2026-10-22 at 5.20.28 PM.png> >> <Screenshot 2026-10-22 at 5.20.53 PM.png> >> >> This experiment is clearly not an A/B test; however, it would seem that >> the signal was focused towards the north eastern US as expected. >> >> Hope that you find this interesting! >> >> 73, >> Stephen (W2WF) >> >> >> _______________________________________________ >> Brazos Valley Amateur Radio Club (BVARC) >> >> 🌐 Website: https://bvarc.org >> 🤝 Get Involved: https://bvarc.org >> 💡 Suggestions: https://bvarc.org/home/suggestions >> 👥 Member Roster: https://bvarc.org/roster.php >> >> Unsubscribe or Change Settings: >> https://bvarc.org/home/club-listserver/ >> _______________________________________________ >> > _______________________________________________ > Brazos Valley Amateur Radio Club (BVARC) > > 🌐 Website: https://bvarc.org > 🤝 Get Involved: https://bvarc.org > 💡 Suggestions: https://bvarc.org/home/suggestions > 👥 Member Roster: https://bvarc.org/roster.php > > Unsubscribe or Change Settings: > https://bvarc.org/home/club-listserver/ > _______________________________________________ >
_______________________________________________ Brazos Valley Amateur Radio Club (BVARC) 🌐 Website: https://bvarc.org 🤝 Get Involved: https://bvarc.org 💡 Suggestions: https://bvarc.org/home/suggestions 👥 Member Roster: https://bvarc.org/roster.php Unsubscribe or Change Settings: https://bvarc.org/home/club-listserver/ _______________________________________________
