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.

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

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

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.

Great video, Ciao. VK5LB

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.

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

Great advice, thanks!

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

where can i get these parts at?

thank you

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

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).

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

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

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).

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

Not the brains but the eyes and ears for the brain

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?

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

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

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

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.

Congrats

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").

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

Great information !

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

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?

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

Very nice presentation! Thanks for sharing.

Well done 👍

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

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.

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

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.

..... 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

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.

awesome video

Awesome stuff!

Really valuable, thank you very much!!! 73

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

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!

Fantastic work Rafael! Thanks for sharing. Subbed

Excellent video! Also, I suspect if Ape passes his GMRS exam, it will be a Christmas miracle!