PU1OWL Brazilian Ham Radio
PU1OWL Brazilian Ham Radio
  • 4
  • 17 674
So, where should I place the antenna tuner??
Last thursday (Apr-6-2023), during the Coffe & Ham Radios show, someone asked about placing the tuner on the antenna feedpoint, so I decided to show on SimNEC what difference makes placing the tuner by the transceiver or the feedpoint
If you are not familiar to SimNEC I highly recomend watching: th-cam.com/video/7bHMV01ZmiM/w-d-xo.html
มุมมอง: 976

วีดีโอ

Improving your ATU100
มุมมอง 15Kปีที่แล้ว
In this video I explain the modifications I made to improve my ATU100 antena matching unit. If you want to know some more of ATUs and directional couplers (SWR bridges) you should check k6jca.blogspot.com/. Many thanks for the guys at @CoffeeandHamRadios for encouraging other hams on making their own videos!

ความคิดเห็น

  • @heinerrambold8889
    @heinerrambold8889 7 วันที่ผ่านมา

    Thanks Rafael for the nice video!

  • @lampshadesneeded
    @lampshadesneeded 10 วันที่ผ่านมา

    any idea why my oled goes crazy and locks up when tuning 40m?

    • @rafaelgcpp
      @rafaelgcpp 10 วันที่ผ่านมา

      @@lampshadesneeded most likely stray RF inside the box. The microcontroller operates with the internal oscillator, at 16MHz, close to the second harmonic of 40m. So if you have enough stray RF around, you can mess the microcontroller. Try adding a choke to the coaxial and some ferrite toroids on the button wires as I did.

  • @agramcroatia4185
    @agramcroatia4185 หลายเดือนก่อน

    I received the finished ATU100 via AliExpress yesterday. I watched this video for a bit and still went to check what diodes were in it. The answer is I don't know, because they are both in SOD-80 with the blue line. The same as was sent to you the second time. Software version 3.2. I connected it, tested it and it seems to work fine. There is almost no degradation at 30MHz. Now I'm not sure if I should replace them or not.

    • @rafaelgcpp
      @rafaelgcpp หลายเดือนก่อน

      @@agramcroatia4185 probably not. If it ain't broke, don't fix it 😄

    • @agramcroatia4185
      @agramcroatia4185 หลายเดือนก่อน

      @@rafaelgcpp Thanks. Then I won't change the diodes, but I will still buy a couple of them, because I have two stores near me in Zagreb (Croatia) that have them. Clearly they are the original, not a Chinese forgery,

    • @agramcroatia4185
      @agramcroatia4185 หลายเดือนก่อน

      Rafael, I found out what diodes are in my ATU100. BAT41 in SOD-80 housing. (LL41) That is great.🙂🙂🙂

    • @rafaelgcpp
      @rafaelgcpp หลายเดือนก่อน

      @@agramcroatia4185 really good news! Those are the absolutely correct ones!

  • @seilfly100
    @seilfly100 หลายเดือนก่อน

    Great job !!! Best Regards

  • @ranchosinnombreannjimmy8427
    @ranchosinnombreannjimmy8427 2 หลายเดือนก่อน

    Hey Rafa, hey guys. I did a dumb thing. Got my ATU100 yesterday, started trying it on all my antennae and radios and forgot its only good for up to 50 MHz .. It didn't like 70cm. It still comes on but doesn't tune. Now its an expensive SWR meter. I call these expensive life lessons TUITION

    • @rafaelgcpp
      @rafaelgcpp หลายเดือนก่อน

      Sorry for delaying the answer as I was thinking on what could have happened. I suspect the analog I/o pins of the microcontroller might have been fried. I'll try to simulate the SWR bridge on VHF, but probably the capacitive coupling on the transformer winding might have allowed higher power to go out on the measurement terminals.

    • @ranchosinnombreannjimmy8427
      @ranchosinnombreannjimmy8427 หลายเดือนก่อน

      @@rafaelgcpp I ordered another one.

  • @GharacDurac
    @GharacDurac 2 หลายเดือนก่อน

    Why did it take me a year to find this video after it was published? Thanks Rafael, my tuner works perfectly after the modification! Thanks also for the detailed explanations. 73s SE7N

    • @rafaelgcpp
      @rafaelgcpp 2 หลายเดือนก่อน

      I'm glad to help!

  • @regularguy519
    @regularguy519 2 หลายเดือนก่อน

    Rookie questions. #1 Remove the surface mount diodes if doing the through hole diodes option? #2 Silver band on diodes face towards the closest edge of the PCB? Thank you.

    • @rafaelgcpp
      @rafaelgcpp 2 หลายเดือนก่อน

      @@regularguy519 #1. Yes, you should remove them, as the capacitances will sum up. As for #2 let me check the board drawings...

    • @rafaelgcpp
      @rafaelgcpp 2 หลายเดือนก่อน

      @@regularguy519 #2. They face the far end of the board. Towards the buttons, not towards the connectors.

    • @regularguy519
      @regularguy519 2 หลายเดือนก่อน

      You're the best. Thank you!

  • @deanhedin1615
    @deanhedin1615 4 หลายเดือนก่อน

    Rafael - My kit arrived. It had some sort of glass surface mount diode 655mv Forward voltage and 15pf. I replace with matched set of 1N34 with 435mv and 13pf. Still building kit. I'll let you know how it works out.

    • @rafaelgcpp
      @rafaelgcpp 4 หลายเดือนก่อน

      655mV and 15pf sounds like 1N4148 to me. 1N34 will work fine!

    • @gpzany
      @gpzany หลายเดือนก่อน

      @@rafaelgcpp Rafael, I opened mine and it also has what looks like 1N4148 diodes. Are these not appropriate?

    • @rafaelgcpp
      @rafaelgcpp หลายเดือนก่อน

      @@gpzany no. The higher Vf of the silicon diodes will make the measurement of lower SWR values incorrect. Using Schottky or germanium diodes is needed on SWR measurement.

    • @gpzany
      @gpzany หลายเดือนก่อน

      @@rafaelgcpp Thank you for the additional information, very much appreciated.

    • @gpzany
      @gpzany หลายเดือนก่อน

      @@rafaelgcpp 1N5711 diodes installed. Much improvement in SWR readings and tuning. Thanks again Rafael.

  • @AB1Vampire
    @AB1Vampire 4 หลายเดือนก่อน

    Good to see you online. Rio booms in here often. n2eye, NY City

  • @deanhedin1615
    @deanhedin1615 4 หลายเดือนก่อน

    Obrigado Rafael. You talked me into getting an ATU100 - Dean KC3JXT

    • @rafaelgcpp
      @rafaelgcpp 4 หลายเดือนก่อน

      Thank you for watching my video!

  • @johnwest7993
    @johnwest7993 5 หลายเดือนก่อน

    I haven't built my kit yet, but I do have a few thousand old HP1N5711's, so I'll carefully match a pair with 5 watts applied on 20 meters and install them. Thank you for the info.

  • @Yosemite_Sam
    @Yosemite_Sam 5 หลายเดือนก่อน

    Great video, Ciao. VK5LB

  • @AHamAtHrt
    @AHamAtHrt 6 หลายเดือนก่อน

    I modified my ATU100 as Rafael suggested using a couple of radial lead 1N5711, as suggested. It is surprising how much better it now works. The tuner is more stable and, subjectively, faster. I also have to compliment the video. I love the detail and description. Well done! Thanks Rafael.

  • @AndyAAzeroAM
    @AndyAAzeroAM 6 หลายเดือนก่อน

    Excellent Rafael, well done. Slightly embarrassed I just found your channel..Thank you

    • @rafaelgcpp
      @rafaelgcpp 6 หลายเดือนก่อน

      Hey Andy!! Nice to have you here, and I hope this video will help you! Actually I'm embarrassed I never added more content to the channel. I have a lot of plans but procrastination always wins!

    • @AndyAAzeroAM
      @AndyAAzeroAM 6 หลายเดือนก่อน

      @@rafaelgcpp it does for sure! I thought about buying the 1000w kit version of this ATU. I still might. Looks like a fun build

  • @blogtonight1698
    @blogtonight1698 7 หลายเดือนก่อน

    Great advice, thanks!

  • @slappomatthew
    @slappomatthew 7 หลายเดือนก่อน

    just ordered a kit. ill check out what diodes are in it and look into replacing them. and I will definitely be doing your suggestions

    • @slappomatthew
      @slappomatthew 7 หลายเดือนก่อน

      kit is here. just ordered 6 of the diodes. Ill see if I cant get a decently matched pair.

  • @foxman362
    @foxman362 7 หลายเดือนก่อน

    where can i get these parts at?

    • @rafaelgcpp
      @rafaelgcpp 7 หลายเดือนก่อน

      Assuming you are in US: Toroids: kits and parts Capacitors and diodes: Mouser

  • @terryboyle
    @terryboyle 8 หลายเดือนก่อน

    thank you

  • @spiritschamber
    @spiritschamber 9 หลายเดือนก่อน

    Thank you for the video! Very nice! Do you think it's a good idea to exchange the elkos with tantal types?

    • @rafaelgcpp
      @rafaelgcpp 9 หลายเดือนก่อน

      Tantalum capacitors are somewhat better than aluminum ones, but not much different up in the HF bands.

    • @spiritschamber
      @spiritschamber 9 หลายเดือนก่อน

      @@rafaelgcpp Thank you! 😀

  • @tommiller1315
    @tommiller1315 9 หลายเดือนก่อน

    Amazing! Easy to follow your reasoning, and some excellent thoughts on enhancing the SWR circuit - got me thinking about upgrading my SWR bridges with alternative diodes you have suggested. (Most already have the 1N60, so I don't expect much improvement, although the BAT62 microwave diode appeals to me for UHF use).

    • @rafaelgcpp
      @rafaelgcpp 9 หลายเดือนก่อน

      The main reason BAT62 is fine is because of its ludicrously low junction capacitance. I recently found out that 1N5711 diodes show a less steeper knee than the modern BAT diodes, so now I favor the latter.

    • @tommiller1315
      @tommiller1315 9 หลายเดือนก่อน

      @@rafaelgcpp Thank you 👍

  • @MilanDjordjevicBG
    @MilanDjordjevicBG 10 หลายเดือนก่อน

    Great job Rafael, will use this on my ATU. Regards from Serbia

  • @hbox21
    @hbox21 11 หลายเดือนก่อน

    I'm just putting one of these together. thanks for the tips much appreciated

  • @JohnHill-qo3hb
    @JohnHill-qo3hb 11 หลายเดือนก่อน

    Rafael, excellent info, now I have some work to on my kit built ATU-100, thank you very much for this video de VE7KKQ, 73, Merry Christmas (10 days away, 2023).

  • @xtogarcia1463
    @xtogarcia1463 11 หลายเดือนก่อน

    Excelentes explicaciones, Rafael. De acuerdo con ambos videos. Otro punto de mejora, estaría de nuevo en el acoplador direccional. Pienso que este debería usar obligatoriamente transformadores separados e idénticos para mejorar en mucho la directividad, cosa que ahora no sucede. Eso de compartir el mismo núcleo magnético con un trafo binocular, no parece una buena solución técnica en este caso, aunque si es sencilla y barata. Se trata del ajuste de precios por parte de los productos realizados en China.Lo mismo que no emplear unos sencillos y comunes 1N5711, en lugar de cualquier cosa que parezca un diodo, que como bien explicas, mejoran el rendimiento de la medidas, con solo su simple sustitución. Un abrazo. 73's

    • @rafaelgcpp
      @rafaelgcpp 11 หลายเดือนก่อน

      O transformador do acoplador é, sem dúvida, um ponto a ser melhorado. O núcleo binocular não é adequado, pois não há o mesmo fluxo magnético nos dois transformadores. Desta forma acaba ocorrendo acoplamento entre as medidas que distorce os valores nos casos mais extremos.

  • @P.SeanCoady
    @P.SeanCoady ปีที่แล้ว

    Not the brains but the eyes and ears for the brain

  • @token112
    @token112 ปีที่แล้ว

    This video convinced me to get an ATU100 knowing it can be 'suped up'. Must torroid rings be used or if I have some spare clip-on ferrite clamps typically used for power supply wires and display cables suffice?

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      The clip-on might work. I used the smallest ferrites I had, mostly because I already had them, and they fit nicely on my enclosure

  • @MrRonychakraborty
    @MrRonychakraborty ปีที่แล้ว

    Hello brother , Where can i get ft37-43 ferrite cores? I have searched all over the aliexpress , there is no good solution

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      I buy them from Kits & Parts (www.kitsandparts.com) or directly from Amidon Corp.

  • @eduardo_cavadas
    @eduardo_cavadas ปีที่แล้ว

    Olá Rafael! Teve contato com o ATU-130? Dizem ser uma versão melhorada desses ATU-100. Seria interessante saber sua opinião sobre a evolução nesses projetos e se houve melhoria de design e qc. Forte 73 PU1KVD

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Opa! Ainda não, mas pelo que vi nas fotos eles reorganizaram a PCB, colocando os indutores e capacitores "por fora" e os relés pra dentro. Também parece usar indutores mais grossos, pra suportar mais corrente. Tirando isso, parece ser o mesmo processador e o desenho da ponte de swr parece o mesmo. Estou falando isso somente olhando pras fotos, sem ver um esquemático... Em relação a evolução, o @Temporarily Offline mostrou outro modelo que usa uma placa para o RF e outra pro controlador. Esse eu considero evolução, pois permite que se coloque uma blindagem separando as partes (isso não vem pronto, mas é uma melhoria possível)

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      O outro é o AT-100M th-cam.com/video/tQzoJcL_vF8/w-d-xo.html

    • @eduardo_cavadas
      @eduardo_cavadas ปีที่แล้ว

      @@rafaelgcpp Encontrei o canal do fabricante do AT-100M no TH-cam. Saiu firmware nova dele dia 11/08 e está em prototipagem de um AT-100M-pro. Segundo ele: "The maximum total capacitance of AT-100M is 1869pf, and the inductance is 8.42uh. The total capacitance of the Pro version is 3869pf, and the inductance is 17.6uh".

    • @eduardo_cavadas
      @eduardo_cavadas ปีที่แล้ว

      th-cam.com/video/m77AZIfO7Y0/w-d-xo.html&ab_channel=ANTUNER video do novo, com legendas

  • @P.SeanCoady
    @P.SeanCoady ปีที่แล้ว

    Let me help you The SWR are not the brains it is the eyes for the brains

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Great analogy!

  • @paul.alarner6410
    @paul.alarner6410 ปีที่แล้ว

    maybe a good idea to fit silver mica caps as well,my c2 100pf fried replaced with a 750v 100pf silver mica,the chineese kits have smd ceramics not silver mica,also the diodes dont match on mine one is a flat smt type the other glass!,these have zero qc,had one of mine arrive with a blanc pic 16f1938 as well,its pot luck,first ebay kit had the button+headers missing(but got a full refund) ,first aliexpress kit had a blanc pic,second kit from aliexpress has missing headers for the power and the button but two extra 47uf electrolytic caps,its totaly pot luck.

  • @goutambasak9899
    @goutambasak9899 ปีที่แล้ว

    Congrats

  • @merseyradar6881
    @merseyradar6881 ปีที่แล้ว

    Hi Rafael, Thanks again for the video. Obtaining original ST micro 1N5711 or BAT41 thc is a challenge as is 1N5711W SOD-123 (Marking Code "SA") and BAT41ZFILM SOD-123 (Marking Code "Z41").

  • @vmenezvc
    @vmenezvc ปีที่แล้ว

    opa! vc faz esse ajuste comercialmente? se não teria alguem pra indicar? Preferencialmente em SP já que moro aqui, mas tbm poderia enviar o equipamento. obrigado! 73

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Vitor, não faço comercialmente não. São componentes muito pequenos e como faço o retrabalho com uma estação de solda comum, tem muito risco de arrancar a ilha. Por isso faço no meu, mas não no dos outros! Mas antes de mexer no ATU, é importante identificar os diodos. As vezes não precisa mexer e está tudo certo, outras vezes tem problema, mas não são os diodos. O Smoking Ape estava com um que tinha diodos certos, mas aparentemente o ferrite errado.

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Outra coisa: colocar os capacitores e ferrites é sempre importante. Infelizmente não tenho extras pra te oferecer.

  • @JT-py9lv
    @JT-py9lv ปีที่แล้ว

    Great information !

  • @JT-py9lv
    @JT-py9lv ปีที่แล้ว

    Great news ! Looking forward to more great videos from you.

  • @lortvideoview
    @lortvideoview ปีที่แล้ว

    Nice work. To the point and “followable”. Your simulation was grand. Thanks very much!! Now, where should be buy our ATU-100 to get the correct (not fake) toroids and diodes?

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      That is a good question. In my point of view, all boards come from the same place in China, so it is hit or miss...

  • @merseyradar6881
    @merseyradar6881 ปีที่แล้ว

    Thanks for the advice on this. I found a mis matched pair at D1 & D2 of my ATU-100 board thankfully before building. Great tips Rafael 73. Mike @merseyradar

  • @jeffcoldwell6949
    @jeffcoldwell6949 ปีที่แล้ว

    Very nice presentation! Thanks for sharing.

  • @TheSmokinApe
    @TheSmokinApe ปีที่แล้ว

    Well done 👍

  • @FEPLabsRadio
    @FEPLabsRadio ปีที่แล้ว

    Excellent video Rafael! Interesting setup with SimNEC, i'm going to have to get that.

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      SimNEC is confusing at the beginning, but it is really easy to learn and it is a great tool for matching and calculating losses. Tip: I used the "reverse direction option". By default the load is on the left side and the generator on the right side, which causes even more confusion for beginners.

  • @traveladventure427
    @traveladventure427 ปีที่แล้ว

    Hello! Sorry for my question. I have the same antenna tuner. The antenna is connected to the input ANT, and from the connector RF IN there is a connection to the transceiver, so connect it correctly. Or vice versa. Please inform. Thank you.

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      ANT to Antenna, RF IN to transceiver is the correct way to connect.

    • @traveladventure427
      @traveladventure427 ปีที่แล้ว

      @@rafaelgcppThank you very much for your answer..

  • @andrewrudlang2785
    @andrewrudlang2785 ปีที่แล้ว

    Really helpful, I learned a lot in this one video, I hope you will make more.

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Thanks! I have a few planned, but my real job is taking a lot of my time...

  • @handyman7147
    @handyman7147 ปีที่แล้ว

    Excellent well detailed suggestions. Thank you. It's my habit from the old days to place a bounce elimition capacitor across switches. It works for RF interference too. As for power lines and audio lines I use twisted pair with shield.

  • @fredcooper2063
    @fredcooper2063 ปีที่แล้ว

    ..... Nice job!! just one tiny point, my ATU does have small value SMD power supply bypass capacitors, mounted where the electrolytics are..... {Can't have too many supply decouplers, mind!! } . G4ZWI

  • @johnkirk5893
    @johnkirk5893 ปีที่แล้ว

    My recent Aliexpress kit purchase has 2 glass SMT diodes. If there is a parts code on them, I'm never going to be able to read it :-) Any idea what part they may be? I have not assembled the kit yet, so it might make sense for me to address the diode issue as part of my build (if there even is an issue!). Many thanks. John, VK4Tj.

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      John, it is really hard to know. Having two of the same diodes is a huge step in the right direction, though. I would guess they are the correct BAT41 diodes, but so many diodes are similar...

  • @benvanerp9857
    @benvanerp9857 ปีที่แล้ว

    awesome video

  • @TheSmokinApe
    @TheSmokinApe ปีที่แล้ว

    Awesome stuff!

  • @moecho73
    @moecho73 ปีที่แล้ว

    Really valuable, thank you very much!!! 73

  • @stevec5000
    @stevec5000 ปีที่แล้ว

    Shouldn't the power conn. be moved to the other end with the switches to eliminate the wires going over the coils completely?

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Ideally, yes, but then the front panel would be cramped. There is an alternative design with separate RF and digital/power boards that makes much more sense. If you think about commercial transceivers, the PA, tuner and receiver board are three separate boards and the digital logic is even one more board.

  • @FEPLabsRadio
    @FEPLabsRadio ปีที่แล้ว

    Outstanding work, my friend. Super explanation of that. I've got the parts in hand, i'll be upgrading mine as soon as the shop is not -9C. Thanks for the info, and I subscribed!

    • @rafaelgcpp
      @rafaelgcpp ปีที่แล้ว

      Glad you liked, and thank you for subscribing!