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YO Yagi Optimizer

YO.exe Yagi Optimizer
Yagi Optimizer

Yagi Optimizer is an old DOS program made more than 25 years ago by K6STI made to analyze and design antennas.

It’s very suitable to VHF antenna modelling and even if it is very old it is still very popular.

Nowadays, in the 64Bit era, with the advent of modern Windows versions, running an old MS-DOS program is very hard, but fortunately someone thought to us.

To run MS-DOS programs under Windows you can use DosBox a  MS-DOS PC emulator that permits you to easily run Yagi Optimizer , YO.exe  without head hakes.

To correctly execute the program follow Mount command instructions when you run DosBox

With Yagi Optimizer you can also use mouse to play with element lengths and element spacing

From here you can Download Yagi Optimizer 6.5.1

22 thoughts on “YO Yagi Optimizer”

  1. jimmy o says:
    January 6, 2013 at 2:07 am

    thanks for all the great info 73 kf5axy

  2. Eric says:
    April 28, 2013 at 2:12 am

    Awesome. Thanks. Been long looking for YO and TA. Found YO with this great article.
    Do you know how can I get TA (Terrain Analyzer) from K6STI?

  3. DoctorD says:
    July 29, 2013 at 9:36 pm

    I have YO7 if you want it.

  4. Ward N0AX says:
    August 5, 2013 at 4:51 pm

    > Do you know how can I get TA (Terrain Analyzer) from K6STI?

    Brian stopped selling to the amateur radio market because too many people made copies of his software available for free. It was very modestly priced – *not* freeware or shareware. And that is really a shame because his software was GOOD.

  5. Garry says:
    September 23, 2013 at 9:50 pm

    DoctorD, How can I contact you? Thanks, Garry
    k4or@arrl.net

  6. Ed IV3TQE says:
    November 20, 2013 at 10:10 pm

    Simone, first of all thanks for YO 6.5.1
    Now did you get YO7 ?
    If so may you post the links ?
    73’S Ed

  7. Ed says:
    November 24, 2013 at 11:26 pm

    Simone, seguendo le tue istruzioni e quindi non direttamente ma tramite questa pagina, ti ho chiesto
    notizie del software YO7. Mi aspettavo una risposta, anche del tipo “non ne so niente”
    Certamente non è obbligatoria una tua risposta, ma sarebbe stata una cortesia tra radioamatori,
    che è mancata.
    73

  8. Simone says:
    November 26, 2013 at 12:17 am

    Ciao purtroppo il tempo per rispondere a tutti attraverso il blog non lo trovo facilmente, ma come vedi cerco di fare del mio meglio pubblicando articoli di interesse generale.
    Mi dispiace non averti risposto nei tempi da te attesi. Cercherò di migliorare.
    Magari tu, la prossima volta se hai urgenza, scrivimi una email…

    per YO7.. mi spiace, non ne ho notizie

  9. Tadej says:
    December 4, 2013 at 6:31 am

    Is there anyone who has AO as well? Thanks, Ted, s51ta

  10. Ed says:
    February 25, 2014 at 8:22 pm

    Ted, did you find AO ?
    I have 6.5
    Ed, iv3tqe

  11. Daryl says:
    October 17, 2014 at 2:48 pm

    I have been trying to obtain a copy of K6STI Yagi Optimizer V7.0
    I have emailed him bur unfortunately no reply.
    Where can I obtain a download copy of this VO V7.0 program.
    Any help “out there” please.
    73, Daryl.

  12. John says:
    September 15, 2016 at 9:23 am

    Is there any You Tube to be seen how to use DosBox to run YO?

  13. Carlo says:
    June 12, 2017 at 5:36 pm

    I Bought an early YO plus upgrades from Brian 20+ years ago.

    Now I want to upgrade to 7.0 but he will not respond. So I have a copy of 7.58 that has the buyers call embedded in the program….How to I get rid of that so I can send files to others??

  14. Simone says:
    November 12, 2017 at 10:03 pm

    Sorry can’t help you. Contact the author.

  15. lukas says:
    January 1, 2019 at 4:50 pm

    how can i get yo optimizer , or buy with new version

  16. lukas says:
    January 15, 2019 at 6:42 pm

    thanks for information to use DOS BOX , so i can use YO optimizer again

  17. Dan K3SKE says:
    June 26, 2020 at 9:28 pm

    I had all three programs years ago. Still think one of the best ever. Wish he would sell the rights to a new developer and get it on a WIN 10 platform! Thank you

  18. David Williams says:
    March 8, 2021 at 2:48 pm

    I’m building A 2 meter yagj I need to know how to specify element diameter In Y.O.
    All My element will be 9.4.m (3/8″ ). I only See it option for tapered elements.
    Do yo have any .yag files for OWA yagis? Thanks.
    Dave

  19. Murphy Tsai says:
    April 26, 2021 at 8:28 pm

    1990, I pay usd$:100 buy yo4.0?when I buy this software, I has been call a phone to K6STI

  20. Leon says:
    May 15, 2021 at 4:55 am

    David Williams , you can delete the other sizes and just leave the size tubing you want

    Leon

  21. Ron Tedesco says:
    July 14, 2021 at 4:30 am

    I downloaded YO and the DOSBox. I cannot locate any instruction set. I need a little push to realize its potential. I’ve built my 3-element Yagi and want to simulate for optimal gain, spacing and SWR. I am familiar with DOS too.

    Help!

  22. Ron Tedesco says:
    July 14, 2021 at 4:30 am

    I downloaded YO and the DOSBox. I cannot locate any instruction set. I need a little push to realize its potential. I’ve built my 3-element Yagi and want to simulate for optimal gain, spacing and SWR. I am familiar with DOS too.
    Help!

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IW5EDI Simone

  • Licensed Amateur Radio operator in 1996 as IW5EDI, active member of ARI Firenze and ARRL
  • Class 1970, married with two childrens, love experimenting and antenna home-brewing. IT System Engineer, recently started having fun with morse code and Raspberry Pi


IW5EDI Simone



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