mcHF SDR m0nka TRX KIT (A-Z assembly) v.0.6.3

EDIT: NEW LPF numbers of turns added here: www.om0et.com/mchf-trx.html
Building the mcHF website: github.com/df8oe/UHSDR/wiki/B...
RF BOARD assembly (v.0.6.3) :
1:16 - what includes the KIT package
6:19 - (L13 - L24) RF input Low Pass Filter coils ( NEW PDF GUIDE HERE: www.om0et.com/files/LPF_coils.pdf)
21:46 - (T2, T3) SWR/PWR meter/bridge transformers
34:21 - T5 transformer
42:17 - T7 transformer
46:30 - T6 transformer
56:56 - RFC8 RF choke
1:00:49 - Sockets, Relays, RF chokes
1:02:23 - Finishing the RF board
1:10:21 - Mounting of transistors on the (The case) heatsink + speaker
UI BOARD assembly (v.0.6.3):
1:20:01 - Header, Sockets
1:22:43 - Encoders
1:24:13 - LEDs
1:27:59 - Rubber buttons
1:29:10 - Push buttons
1:32:35 - Fitting the PCBs in to -he case
1:35:13 - The case shield plate modification #1
1:39:27 - Stacking the PCBs in the case (screws and nuts)
1:44:18 - The case shield plate modification #2
1:49:19 - Display module headers modification (to be removable)
2:00:58 - Lift the buttons - The case shield plate modification #3
2:10:16 - Baofeng microphone to mcHF modification
FINISH!!
2:21:48 - Real on-air QRP tests with G0DJQ (Mark) and ON6ID (Hugo)
This video is about "how to build a mcHF SDR transceiver" from Chris m0nka. This is a genuine m0nka project and not a illegal chinese copy! We support Chris and his great work ;) Total cost of this KIT with the metal case was approximately 350€.
Here is the link for more info: www.om0et.com/mchf-trx.html
THANKS FOR WATCHING ;)
#mchfm0nka #sdrtransceiver #assemblyinstructions

[@phillipwilkerson2139]

I got my mcHF kit in the mail a couple days ago, and your video has been extremely helpful as I assemble and test the radio. At some point I will probably add the ATU module designed by UT0UM (a mod/build video for this would be very helpful for the community as well). Thank you for all your hard work to edit and post this build video!

[@lucyjeliazkova3793]

This is great Step-By-Step how to build our mcHF. I am sure it will be great help for many Hams. Super effort Paul. I especially like how you break the steps with individual introductions so it makes it easier to use as a guide. Thank you for supporting the project! Lucy

[@OM0ET]

Thanks Lucy! Yes that was my plan 😊 to make an easy instruction manual. I had many problems to get plans from multiple sources, with many different mods and PCB versions on the internet. I was confused many times which plan I had to use. Just wanted to make it easier 😉👍

[@pda49184]

Thank you Paul.. As always you produced an excellent quality video with all the detail needed to build the kit. Your work is top quality ...

[@OM0ET]

Thank you so much for your support Pete! 😉👍

[@smstiao-tecnologia]

Congratulations Paul on your purchase and be very happy with the use of it !

[@OM0ET]

Thank you my friend for watching 😊👍

[@otterc.9337]

Paul, thank you for this outstanding build video. I received my kit today. Unfortunately, the enclosure is no longer included, and I must now wait another month to get a mail order case. However, your video has helped me avoid some pitfalls in the assembly. Thank you, and 73!

[@OM0ET]

Thank you! I am happy you found this video helpful for you! Good luck with your radio! 😉👍73, Paul

[@rachael8742]

Excellent video Paul from over there in the Slovak Republic. Very interesting as I have just purchased the same transceiver kit. I'm waiting for it to arrive and very much looking forward to the build. Very interesting mods. Great job and excellent camera work, and thank you for all the information links and documenting the process. Brilliant. I've also subscribed!

[@OM0ET]

Thank you for your nice comment! 😊 I hope that it will help you with your own build 😉👍 73 and enjoy your mcHF rig! Paul.

[@danieljanto7647]

OM6AN Dano, ďakujem za nádherné video, gratulujem k dokončeniu skvelého TCVR QRP Dr. Palo, veľa pekných spojení.

[@OM0ET]

Ahoj Dano! Aj ja ďakujem! 😃 Teším sa ďalšie spojenie. Mozno aj na VKV direkte 🙂👍 73.

[@stanisawgrams3012]

Neither I have this sdr nor I'm a ham yet (preparing for the exam) but somehow I watched this whole excellent video start to finish. Congratulations, good job on this very informative film! Best regards from Gdansk, Poland, 73!

[@OM0ET]

Thank you very very much for your support of my work in this channel and for watching this video Stanisław 😉👍 Greetings from Slovakia! Paul OM0ET

[@jeromegrzelak8236]

Great Job

[@melvynburchell]

The MCHF is such a great little radio... The detailed build instructions here are a real inspiration... The kits have much of the fiddly SMD work already assembled leaving just the bigger components to fit... Get to know your radio properly by building it rather than buying a cheaply made clone that has sacrificed BPF components and cut other corners to cut costs/maximise profits, Chris M0nka has every right to be proud of this creation!

[@marklowe7431]

Given PCB manufacture is so cheap now for excellent quality it puzzles me there's never enough stock. Agree on the positives of the radio though. It's a great design.

[@ae1tpa92gwtom2]

Hi Paul, I can only re-iterate what everyone here has already commented, superior video, build, explanation, presentation, really hope to catch u on the bands one day, this video, is a real inspiration, and keeps the spirit of ham radio alive, bravo, 73

[@OM0ET]

Thank you Tom for your support 🙂 It was a long jurney to get this video to finish. 5 days of recording and other 3 days of editing 😁 and its still 2 and half hours long hi. Like a movie Titanic 😄 Therefore I am very glad to see that this work was worth the time 🙂👍 Thanks for support! 73, Paul.

[@ae1tpa92gwtom2]

@@OM0ET again excellent work, i still have one of yr loop antenna in Bulgaria, ok ciao for now 73

[@stephenclark316]

Thanks! This was a huge help for me when putting together my MCHF v.6 kit i purchased back in 2018/2019 time frame.

[@OM0ET]

My friend, thank you so much for your donation and support of this channel! 🙏 I am so happy that this video helped you with MCHF transceiver kit! 😉👍

[@AE5X]

You should be paid by M0NKA for doing his job for him in providing a detailed and useful guide to building the mcHF.

[@OM0ET]

😄👍

[@williamcoarsey5222]

@@OM0ET Do the newer kits include your modifications?

[@OM0ET]

@@williamcoarsey5222 which modifications you mean?

[@williamcoarsey5222]

@@OM0ET Where you had to cut the shield and other mods to make the display and buttons fit better.

[@OM0ET]

@@williamcoarsey5222 no, i don't think they will include this headers to the upgrade. But it would be good to have removable screen module 😊

[@hamradiotube]

Watched all 2.5 hours of this build. Awesome radio and awesome video.

[@OM0ET]

Thanks Mike! Oh actually? 😲 At least I hope you enjoyed your cofee! Because 2.5h is like an Avangers movie hi hi 😄 Hope you were not bored 😉

[@hamradiotube]

@@OM0ET Not bored at all. I watched it over 2 evenings. I really liked it.

[@ulfunflieger]

Hello Paul, thank you for this fantastic video. Brilliant quality!! 😀 73 from Martin, DG4BAD

[@OM0ET]

Oh thanks Martin! 😁👍 73!

[@paulthompson1a]

Fantastic you are very skilled, was a joy watching you build this kit 2E0PGT

[@OM0ET]

Thank you so much for flowers Paul. It took me 5 days recording and 3 more editing this video 😄 but it was fun 😉👍 73

[@lucyjeliazkova3793]

Just to add... I enjoyed it so much that actually wanted to pause it and start building one myself 😀😀😀 Lucy

[@OM0ET]

LoL 😄 Thanks Lucy!

[@SuburbanDXing]

Although admittedly I watched this in segments (because of 2 hours+ length), this is a wonderful build, and I felt just like Lucy; wanted to build one myself! Great work, Paul...as usual...73! de WX0V

[@michaelcox436]

I felt guilty about buying a fully-built one until I saw this. Holy crap. Nice job.

[@riz94107]

I just got components for my build today - so I'm looking forward to using this as reference. Thanks for a great job!

[@OM0ET]

Great! Please read new coils windings in the video description before you start! 😉👍

[@RESISTAGE]

I got mine already built from M0NKA. came with antenna tuner. excellent radio. wish it would have the ability to transmit full power on 11m instead 500mv.

[@riz94107]

@@OM0ET Thanks for the heads up - I found the files on your website, but the links in the description above are broken. (I think you moved your site). Thanks again for a great video - and all your other videos!

[@OM0ET]

@@riz94107 ah sorry, you're right. My new domain is www.om0et.com

[@GilbertoFreitasMendes]

Amazing project Paul. Youŕe one HERO starts from zero into clear QSO with others friends. Greetings from Brasil. Stay safe! 73's!

[@OM0ET]

Thank you so much! :)

[@w6by]

I've had my MCHF kit for a couple of years but didn't build it. Your video inspired me to go ahead and finish it. Thanks for the thorough build description, that helped a lot by watching where you ran into problems. This is a kit for the very experienced builder, the instructions (mostly build hints) are very sparse and you will need to do some interpretation of how things actually fit together. My kit did not include the final RF transistors - I had to order them separately. You don't really need to socket the LCD - the designer put PCB pads on only the necessary signals and left blank vias for the rest, so it should be easy to unsolder. I was concerned about the board to board connectors shorting against the LCD, so I added a strip of kapton tape across the pins as a precaution. The LCD doesn't have any traces in this area so it should not be a problem. I bought my case separately from eBay and it seems to fit well, but as mentioned before, you will have to figure out where all the screws and plates go. When winding the coils I kept my LCR meter handy to verify that my windings were correct and the inductances were close to what the schematic values were. Thanks again - I am close to finishing and will let you know how it goes.

[@aaronhallam9444]

Хорошее виде, молодец Пол! Я тоже собирал, но только 7 версию! Удачи 73!

[@antenaseinterfacescb]

Amazing work 7351.

[@mariobruseghini8125]

Amazing, congratulations Paul

[@OM0ET]

Thank you Mario! ;)

[@G5XDX]

Fabulous to work you today on 20m, the homebrew SDR sounding great on 5w! Best 73 Callum G5XDX

[@OM0ET]

Thank you Callum for the nice QRP QSO with you from my mcHF transceiver and only 5W 😃 I am happy for the good audio report! 😉👍 73, Paul.

[@IanG0OSY]

Thanks Paul. I just ordered one after watching your vid. G0OSY

[@OM0ET]

Hello Ian 🖐 I hope you will enjoy this TRX build 😉👍 I wish you good luck! 73, Paul.

[@vladimirpugachev6017]

Perfect video and good job, Paul. I even felt a smell of rosin (colophony, I am not sure how to say correctly this word) when I was watching your video. Thank you. rw1m.

[@OM0ET]

🤣 heh that's good Vlad! I am happy that you enjoyed this video 🙂👍 73

[@chrisruff3392]

This was amazing detail and patience on your part. Thanks for doing this. You have made it significantly less daunting of a task! 73 de K4RUF

[@OM0ET]

Thank you! 😊

[@thesydmc]

Very good job, congrats.

[@Davidjkeates]

Brilliant video, thank you

[@PA1JPR]

Thank you Paul for this realy helpfull video. Just ordered one myself ;-) Best 73, PA1JPR

[@OM0ET]

Thank you my friend! :) I hope you will enjoy build this radio. It's really fun! :) Just note: before you will made LPF coils, read my new edited guide in the video description with new numbers of turns ;) Good luck! 73, Paul.

[@eduardogarciamontesdeoca5935]

Nice job Paul!! In the future I’ll make a similar video with the explanation is Spanish for all the Hispanic hams out there

[@OM0ET]

Thank you. You can just made and add spanish subtitles in to my video if you wish. It's an open option for all 😉👍

[@LubomirKuzman]

Nice made video Paul, very good - ilustrative and clear not only for the first time builders - kudos for you! .... Krásne spracované video Paľo, naozaj podarené - názorné - prehľadné a nielen pre začiatočníkov. Za mňa 👍. 73 de Ľubo OM6IN

[@OM0ET]

Ďakujem Ľubo 😉 ale je tam potrebná ešte drobná korektúra, hlavne čo sa týka počtu závitov v LPF. Posnažím sa to dať čonajskôr do popisu videa. 73, Paľo.

[@simonsimpsonuk]

Fantastic Vido I Have now bought a kit after watching this 73

[@OM0ET]

Great! I wish you good luck with build your mcHF! One advise: LPF coils turns numbers are not correct in this video. Some of them are a bit different 😉

[@R2AUK]

Отличная работа, Пол! 73s de R2AUK

[@rogerinwales]

Excellent informative video Paul. Thank you. 73 Roger MW0IDX

[@kazcat8096]

cool paul i just ordered one

[@Hanso929]

Hi Paul, you did a very good job. Excelent video. I just ordered one. Best 73 Hans, PE1BVQ.

[@OM0ET]

Very nice Hans! I hope you will enjoy build this rig ;) Good luck and 73! Paul

[@chhupparustom]

Great - gotta make one for myself!

[@siddharth4662]

How did it work directly when you started it for the first time? My radio has stopped receiving and transmitting all together. so i pressed F1+F3+F5 and reset it then reconfigured it but still it is not able to even receive. Can you help please!

[@chhupparustom]

Question: which circuit board vise are you using to hold the PCB? Is it metal or composite?

[@ClaroVAN]

Hi Paul! As always, your video is amazing. I plan to buy one and i have a question about the space betwen the backside where the speaker is mounted and the pcboard, how much space is there for mounting a battripack? Regards Roger, de SM0LTV

[@DavePokorney]

Wonderful and clear video, thank you! Did you have an earlier video for v.5?

[@Patrick_PD2ET]

Great video !! super profesional building skills !! well done !! it was a pleasure to watch and listen!! i like much your channel om0et l!! 73 from Papa Kilo NL 😊✌

[@OM0ET]

Thank you again so much ☺️😊 Best 73!

[@kazcat8096]

on the rfc8 you did 9 turns but said 8 turns at the start witch is correct

[@terrynorris2116]

Paul This is great video and interesting viewing. Please where can I purchase this kit including the case? Thank you.

[@olegandriievskyi8885]

Good job,i want to get same one

[@nehanichikahuak]

hi, i followed the links but i dodnt found where to buy thiws kit, can you link it please...?

[@decioxy]

Great job! Congratulations! De PU2PYB- Brazil

[@johnjuniorwayne7958]

Many Thanks for your job ! In the future use ACETYLSALICYLIC ACID to clean the insulation on the conductor by heating the wire on the aspirin pill with the soldering gun.

[@mwsparky2]

Terrific video Paul, very relaxing to watch and most interesting. I am just starting to understand these SDR radios, as I'm old school really. I see you were transmitting 10watts, but the spec is 5watts? were you using an amplifier or did you tweak up the output stage ;-) beautiful reception I must say 👍 Thank for a long and enjoyable video. Regards Mike G8POL Nottingham, UK

[@OM0ET]

Thank you so much for watching and very kind comment! ;) 73

[@rajeshhuddar3470]

Where does one order the kit from.

Hi, Paul! How and where to order this kit?

[@2001cavador]

I am amazed you are running 10 watts into a long wire and your contact was running 300watts into a ten element yagi and he could still hear you. Now that's real QRP!

[@2001cavador]

BTW Thanks for the great tutorial on building the kit Cheers. & 73's

[@OM0ET]

Thank you for watching my video! 😉👍

[@joemason9187]

What a fantastic com radio from whence could one purchase such sorcery and great learning aid video thank you

[@EC5ABG]

Muy bueno, felicitaciones, de Tony EA5HYW. 73.

[@m.a3957]

Hi Paul As usual another very nice video with many tips on how to mount this kit. I have many questions but they were already asked in the comments. What do you think about the rx of mch rx VS X5105 73 Med CN8YR.

[@OM0ET]

Hello Med! 🖐 Thanks! I think that sensibility is the same but on mcHF is nicer output AF sound due to bigger speaker 🙂

[@kazcat8096]

once you had built it did you have to set up the transmitter pa or did it all work from building

[@OM0ET]

No, the PA must be always adjusted before TX, otherwise it will not TX at all.

[@YD4GSI]

Skema and sketc pcb gerber?

[@TingILi]

The perfect radio kits that I built are the "Elecraft".

[@7terrago7]

Great tutorial Paul! 73! Rafal DL9RNV

[@OM0ET]

Thanks! This viideo is almost two weeks of work with postproduction 😃 I am happy with the result 👍

[@robc3863]

Very nice video, you did a great job, but what a lot of work, and difficult filing the LCD header down! The TX quality in SSB and FM sounds really perfect. It is a shame that M0NKA or the German club are not producing kits any more. The Chinese clones also seem unreliable, they won't give details of board or firmware versions, and ask more for a kit than built!

[@Hogkat]

Nice film just my two cents: and that is when you trimed the headers of the lcd schreen I whould have kempt the length of the femal headers and desolder the male headers so that I can keep te length of the female headers and also remove the black isolation of the male headers so you can keep the depth of the schreen to the top pice and also the distance of the top cover to the buttons. That whould also look better. But its a good video to look at and to learn. 73 PA1TAS/ZS6PMT

[@Gm1vla]

Very good video paul I have the same radio but to my shame, I got someone to make mine : )) how long did it take you to assemble it all Paul regards Tony

[@OM0ET]

Hello Tony! I am sure that you are happy even when your rig build someone else 😉👍 It's a great project! Worth the money. 73

[@user-wd1tp7gt9r]

You R Great

[@OM0ET]

Thank you! 😊

[@michaelfuchs1467]

Excellent video (again) Paul! (just paused to write this). 😉 I've been wanting to build this radio with my daughter for a while now - or rather she wants us to build some radio gear together and therefore I've zoomed in on this project (the original of course since I just can't stand knock-offs of open-source projects. How many hours do you estimate your build took? When watching you doing the toroids I can't help noticing an error in the build guide. It says' 10 turns' in the text while clearly showing 11 turns in the figure (T2 & T3) - each pass through the center of a toroid is counted as 1 turn according to what I've learned, right? Best wishes and hope you're doing well! / Mike 🇧🇻

[@OM0ET]

Hello Mike. Yes I know I did mistake on one toroid, but immediately I have seen that mistake by counting again I repaired that. I think it's showed in the video too 😊 Yes you are correct, wire through the center counts as one turn 👍

[@mewrongway]

How can I get PCB's or kit? Thanks so much for your awesome build video! 👍

[@OM0ET]

www.monka.co.uk

[@pentachronic]

Ythat looks to be a very impressive bit of kit. I assume General Licence is required to transmit on it ?

[@OM0ET]

You can use it as a receiver also without license.

[@KornelJavor]

Nice job, thank you for sharing your work with us! May I ask how much time did it take to finish that fine rig?

[@OM0ET]

Thank you! 😉👍 It took me 5 days, about 30hours. So long because I recorded and had to repeat some shots a few times again 😄 Normally it should be done after couple hours 👍

Thanks, very interesting! Can you take a look at the QCX-SSB project, please? It's a simple mod to the $50 QCX CW receiver made by QRPLabs.

[@OM0ET]

Thanks Erik for recommending the QCX-SSB project. I will look at it 😉👍

[@hamradiomaker]

Hi friend, where can I buy this kit? ft73 by Alexandre, py4gg from Brazil

[@KarlianyLima-de1nd]

Ele não pode responder essa pergunta, não reparou isso ?, É apenas um vídeo onde ele mostra seu ego!

[@KirilZyapkov]

There's a mismatch between the number of turns for LPF torroid inductors in your docs compared to other sources. I think yours are wrong.

[@OM0ET]

Thank you. Yes it is possible

[@AlteSchutze]

I saw it like an interesting movie !))Thanks for the nice video and greetings from UR5 !73 dr.Pavel

[@samuellourenco1050]

Good job, except for the shield part. You could have fixed the lamp position, instead of resorting to cut the sheet with a garden tool.

[@OM0ET]

Thanks! I had no other variants with this parts what I got. 👍

[@guesswho6038]

@@OM0ET I soldered mine directly to the visible BNC connector leads. I guess soldering the lamp first would do, the wires should have enough space under the BNC connector.

[@OM0ET]

@@guesswho6038 yes i did the same on other pieces of this rigs 😉👍 it's ok now

[@RubensKamimura]

Nice!!! How much? Where do I find this? 73's Rubens py2pvb

[@OM0ET]

www.sk-tech.sk/om0et/mchf-sdr-trx-kit.html

[@airheadbit1984]

@@OM0ET bad link not found

[@rasputinputin8103]

If you paint the underside of the shield with a couple of coats of Shellac, all will be safe.

[@Andersonllopestv]

Sensacional, muito bem explicado e detalhado, uma pena que fica inviável comprar o kit aqui no Brasil. 73 PY1FI.

[@RubensKamimura]

Onde encontro este kit? Que bacana, quanto custaria? Fraterno abraços. 73's de Rubens py2pvb

[@GilbertoFreitasMendes]

Encontrei já montado no Aliexpress, já montado. Entre R$ 2.400,00 e R$ 3.100,00. É um QRP multibanda. Achei o projeto bastante interessante. O cara se aventurou desde o início!

[@GilbertoFreitasMendes]

@@RubensKamimura Encontrei já montado no Aliexpress, já montado. Entre R$ 2.400,00 e R$ 3.100,00. É um QRP multibanda. Achei o projeto bastante interessante. O cara se aventurou desde o início!

[@rv9ct186]

It is desirable to distribute the turns on the toroid evenly

[@OM0ET]

Yes, it is 😊👍

[@boratsagdiyev3936]

getting a nice 404 not found on some of those links up there.

[@OM0ET]

Look here www.om0et.com

[@doctorbills790]

Flux is you friend. Use some.

[@marklowe7431]

Sad you can never buy the boards. Almost 4 years now and every time no stock. Hesitant to buy the rip off clones but it's looking like the only option or go for something totally different.

[@klb2005ao]

73!!! 4Z5KR

[@OM0ET]

73 Anatoly! 🖐

[@jimsouthall1085]

Paul, as much I like your videos, I am not going to sit through 20 commercials. Unsubscribe, sorry. KZbin is going to drive away many people.

[@df98156]

For you, maybe install and use uBlock Origin for watchers on desktop and KZbin Vanced on Android

[@airheadbit1984]

@@df98156 I never noticed it before, what commercials I asked then realized I'd install AdBlock years ago and that is why I have never seen an ad while viewing

[@riccardosanti3381]

Very good job, Ciao 73 de IW2OGQ, Rick