Відео

Not yet but I will soon. I am working on a video about a 50W CW RF amplifier kit, then I will have one video on the finished USB powered regen receiver, then the Michigan Mighty Mite will be next 😁. 73, YO6DXE.

Thank you so much for the commend and also for all the info. Ohh I ended up modifying mine following the instructions from a video I will link down bellow. I decided to transform the crystal oscillator into a preamp as I didn't use the oscillator anyway. For now it works fine, but I haven't tested it on all frequencies yet. Thank you one more time. 73, YO6DXE. ua-cam.com/video/0BxpMm6SLoE/v-deo.htmlsi=pnKMNnEENKBY0uap

@@dxexplorer I know that video and it inspired me to modify them. However, to use the module as frequency meter without loading the circuit (or in GDM), I used a old circuit that i found in an old Tehnium magazine (wide band input buffer with FET). The circuit worked fine up to 80MHz, the max that I used it, powered with a 7812 and shielded. As for the crystal/ceramic oscillator, I built myself 3 separate oscillators each for a frequency range (LF, MF, HF); I adapted various schematics from the same magazine.

@sebastian19745 Amazing idea with separate oscillators. About Tehnium... I still find a lot of great schematics there that I try to bring back to life... when I have the free time 😁. The magazine the open an entire new world to me.

I tried this version as well and indeed is a little better than the one based on the N1TEV regen. This one I will try to keep it close to the N1TEV design, just because it will be the base of the improved version of the design that I started long ago and didn't finished. But for sure at some point I will make a video on the one you also described. Have an amazing weekend my friend. 73, YO6DXE and thanks so much for sharing this.

For the Sputnuk receiver... at the beginning when I built my very first versions... I was just using a simple wire around 6 to 10 meters that was hanging in my room on the ceiling and I also connected a ground wire to the receiver. Then later on I used an EFHW antenna. There are videos on the channel on these antennas as well.

Thanks ​@@dxexplorer

@nonamex3052 Always a pleasure my friend. 73, YO6DXE.

I haven't tested it on mine as I had to take it up to the scouts camp and install it there. But it should work yes. I will rebuild mine soon using the PCB boards and in the video I will make... I will use the Sputnik as a demo 😉. My Sputnik was in a re-building process and it was not working when I made the first videos on the antenna.

@@dxexplorer one thing i buit it it amazing with my sputnik reciever if you want to see it i will post a short

@The_electronics_nerd Yes please. I would love to.

@dxexplorer One thing. You have amazing projects. Every project you have works first try.

@The_electronics_nerd I try to make them like that ))). You know how I started the channel ? Or why actually. I was making my first steps also and tried a lot of schematics I found online. Sadly around 60% of them didn't work 😐. I thought I am doing something wrong... but then the more I learned, I discovered the mistakes and some ended up working ... some not so much. So I started with the idea that I would present those that are nice and great projects to build... those that do work... and I try to stay away from those that didn't haha. But now and then I may put one of those as well. Like the CW keyer with the 555 IC. 😆

Ohh yes it is indeed 😁😁. 73, YO6DXE, Thank you for watching.

It was just for fun. At the end of February I will have another one. A much better one 😁.

Ohhh that sounds great. By the way about the PCB, I updated the design to use a small potentiometer to fit in the case. I had to make modifications to mine to be able to fit the big potentiometer in the case. I also used the receiver these past days a lot. Those cracks and strange sounds are exciting and I don't know why. Basically I listen to nothing... still is so exciting 😅. 73, YO6DXE.

Always a pleasure. I want to try the custom firmware now for the TD-H3 and see if I like it or not 😁. 73, YO6DXE

The crossover is a must yes on the coax... otherwise you do not have the out of phase signal going through the choke that would cancel the common mode current.

P.S. And if you can get the FT240-43 or FT240-31 and more turns of coax on the toroid ( I think 12 is the right number if I remember well ) then is even better compared to the little toroid I used.

@@dxexplorer Thank you for the Reply. I still am unclear about the winding. is the cross over a must?

@johnnybigpotato2404 Always a pleasure. And yes... if you build the coax version... the crossover is a must yes. That is the only way you will create an out of phase signal going through the coax, that will cancel the common mode curent.

@@dxexplorer Thank you very much for taking the time to answer. It was my suspicion, but I had no idea how to figure it out myself. :) Thanks! KD0YKK

You are not alone 😅. There are many reasons why I love simple circuits / solutions ... and this is one of them 😁. 73, YO6DXE

I have to learn the code first as I am really bad at this part. But we will meet on air for sure after that. And to be honest, I think once I start in CW that will be my main thing for sure 😁. 73, YO6DXE.

0.740mA in my case on RX and about 100mA in TX. I really like it as well. Too bad I could not get it to work with a telephone speaker as Miguel recommended. Mine is around 300 Ohms so I guess it needs a different impedance. Hi Z earpieces don't work. 73, YO6DXE.

@@dxexplorer Thank you!

Always a pleasure.

Yes that is one of the problem with these extremely simple transceivers. But I think as long as it can't be hear online it should be fine. I think if I change the 10k resistor with 12k it should lower that oscillator continuous transmission even lower so then it would be under -40dB as I want it to be. But I tried to stick to the original design made by Miguel and kept the value as 10K. Of course anyone can pick what they think is better for them 😄. So far I tested it on a few online SDR receivers and I hear the transmission, but not the oscillator, so I think is a good sign. But for sure if we are neighbour's you would hear the oscillator 😀. 73 my friend, YO6DXE.

@@dxexplorer это не проблема, это особенность подобных схем, они так работают, и уменьшить излучение при приеме здесь можно только за счет и так не высоких характеристик😀 судя по видео он на приеме излучает около 10 мВт, не думаю что тут можно кому то сильно помешать, действительно только соседу сидящему рядом😀 как по мне вы и так получили практически идеальный вариант подобных схем🙂

Yes is true, the simplicity of the schematic doesn't really allow you to do much else to reduce the continuous transmitted signal of the oscillator. Well... this if we want to stick to the simple schematic as my intention is 😁. So far this one is my favorite transceivers even if it has many limitations. 73 my friend and have an amazing weekend. 73, YO6DXE.

I love it as well. The only thing is that I never got it to work with a telephone speaker as Miguel was recommending in his original article. The only way was to use an external amp at high gain. I still want to make it work with a telephone speaker instead 😄. 73, YO6DXE.

Besides trying to code CQ CQ DE... everything else is not a mistake... is more like I have no clue what it is I just make noise 🤣🤣🤣. I want to learn the code so badly but I do not have the time right now 🤦🏻‍♂️. 73, YO6DXE.

I just love simple circuits like this one. Is not perfect of course... is too simple to make something fancy out of it, but is a joy both to build it and also use it. Of course now I only play in the dummy load using it as a Morse Code Practice Oscillator but I can't wait to use it on air as well 😁. 73, YO6DXE.

Thank you so much Roberto. I was wondering what is with this 1.99$ ... I thought you calculated the cost of the components or something 🤣🤣🤣. 73 my friend, YO6DXE.

Sounds good to me... but as BBQ 🤣 ... joking hahaha. A proper translation in Spanish would be El Pequeño.

Ohh more or less. Hard to call it a garden yet but I also like it 😁. 73, YO6DXE.

@@dxexplorer Such an amazing place! You have tomatoes, a fence and an antenna: these three things together qualify it very well as a wonderful garden! 😊🍅 vy happy 73 from Bavaria! DA6CJ

@gibtsnocheinenfreien Homegrown veggies are the best indeed. It is wonderful but if all goes well... fingers crossed for that, this year I should end up in a much more beautiful place up in the mountains. Greetings from Transylvania. 73 my friend.

So far is my favorite transceiver, I don't know why 😁. 73 my friend.

Thank you so much for watching 😁🙏🙏 73, YO6DXE

I just replied on an earlier comment regarding this: A little yes but too much not really. I've heard many others these past days on air waaaaay worst. Is one transistor so is expected. But the power can be lowered and the chirp dissapears for those that want to have a clean signal as well. Either by placing a small resistor 10 to 100 Ohm between the emitter of the transistor and the inductor, or by changing the value of the output capacitor ( the one in the emitter ). 73, YO6DXE.

This is what I call chirpy ... still ... is my favorite CW transmitter from UA-cam and I really want to build it 😁. ua-cam.com/video/rrhGGMnywYo/v-deo.htmlsi=6BjTfNz3aIBpF8rj

A little yes but too much not really. I've heard many others these past days on air waaaaay worst. Is one transistor so is expected. But the power can be lowered and the chirp dissapears for those that want to have a clean signal as well. Either by placing a small resistor 10 to 100 Ohm between the emitter of the transistor and the inductor, or by changing the value of the output capacitor ( the one in the emitter ). 73, YO6DXE.

Ohhh and I thought I am bad. Hahaha thanks this made me feel better 🤣🤣🤣. I really have to learn the code pfff. Do you realize that CW is actually the reason I got into amateur radio in the first place and I still don't know the Morse code ? 🤣🤦🏻‍♂️.

We both need to learn CW 🤣🤣. Ohhh good luck with the internship and building the antenna. Send me photos 😁. We keep in touch. 73, YO6DXE

Hehe. It reminds me of the sound of the tube transmitters 😁😁.

Ohh that is good to know because I think I have a bunch of them recovered from older boards. Maybe in the next video I remember to tell a funny story about tranzistors now that we talk about them 🤣. 73, YO6DXE.

@@dxexplorer it will surely be a pleasure to listen and watch, my collection came from Japanese tv sets and those 1815 also from such source

I think o once had to deal with this problem as well. But to be very honest I do not know what it was, but I do remember I messed up something in the schematic. Probably to make sure the antenna is ok and good for that particular band. Let me know... maybe we can figure it out. 73, YO6DXE.

Thank you Nigel and Happy New Year as well. Not sure if you received my New Year video message 😁. I hope its all good with you there. 73 my friend.

I do too. I think I am addicted to these simple circuits. They are not perfect and sometimes the adjustments are annoying to do in order to make them perform decent.. but the satisfaction you get is priceless 😁. 73 my friend.

Good morning from Transylvania. Doing good so far... just a little busy with work. Hope you have an amazing rest of the week. 73, YO6DXE

I don't know what to say as I do not have that issue. So far all worked well. Maybe if someone that had the issue could reply to the comment. 73, YO6DXE

@ ok, so I figured it out. I needed to have dual synch and D.wait option on. I didn’t have the D. Wait option on. It’s the option that adds the recycle ♻️ icon to the screen.

@chadrides914 Ahaaaaa ok. Thanks for letting me know. Is good as I can answer back in case another similar question may be asked by others.

I only plan on using this for HF as clearly it doesn't do a good job on VHF or UHF. On SMD... not allowed in my constructions. But towards the end of the video I am talking about another version I am working on that should be fine all the way... no resistors for that one of any kind. For HF it does do a decent job so far. That is all I trust it to do 😁. 73, YO6DXE.

I have no clue to be honest as I made it specifically for the amateur radio bands so it makes me think that on broadcast bands where the AM signal is really strong as I have seen that you use it for as well... it is possible to sound strange. Probably you may have to make some adjustments or maybe just try to lower the RF gain as much as possible so the signal is not as strong. This is all I can say from trying to imagine how or what "it sounds like a broken car that won't start" may sound like 🤣.

@@dxexplorer you will not believe it. i used a boost converter and guess what! it generates the like a broken car sound. i checked with my spectrum analyzer and with the radio radio. the radio is fine!!

@The_electronics_nerd glad it works. What is that converter thing ? I've never heard about it ?

@@dxexplorer this is a voltage converter that for example takes 3 volts and converts it to 12, 13 volts whatever voltage you like.🙂

@The_electronics_nerd ahhh ok I got it now. Ohh yes I tried as well one the other day for the USB powered receiver and it was a disaster. Well not really but I did had some ugly noise that I just couldn't filter it out in a simple way.

Cu mare drag. Nu is masuratori de laborator dar na... asa cat sa imi fac eu o idee si sa inteleg e bun 😁. Salutari de la Brasov. 73, YO6DXE.

@dxexplorer Personal sunt începător in ceea ce privește filtrele de mod comun. Un balun 1:1 ar avea aceeași funcție ca cele două prezentate? Aș avea nevoie pentru un dipol.

@coroamanicolai4527 Nu e bai ca nici eu nu sunt tare avansat. Pai in principiu cam da. Acum depinde si se puterea ce intra in antena. Uite recomand cu drag un articol aici. Ma rog is mai mult instructiuni pentru un kit, dar e de mare folos zic eu informatia de acolo. Mie imi place QRP, insa ma gandesc ca poate pe viitor vreau sa iau si ceva mai de putere asa ca incep acum sa imi construiesc cam tot in idea ca poate o sa emit si cu 100W nu doar cu 5W... si reconstruiesc cam tot ce am sa fie ok pentru 100W ca sa nu mai tot schimb pe viitor. www.hfkits.com/manual-for-11-balun-150-watt-for-dipole-antennas/

@@dxexplorer Mulțumesc!

@coroamanicolai4527 cu cel mai mare drag.

That honestly I don't know and for me is impossible to test... all I have is 5W and I am honestly way more happy with QRP than I would be with 1KW. That is way too much for me. I am no broadcast station 😁. QRP is like fly fishing... you work hard for those contacts and you learn how to work with the conditions you have to make the best out of it. But from the little knowledge I have so far I would say that for sure RG58 is not a good idea and we would need something much better. On the toroids part... that I think is not so hard to calculate as most manufacturers of the toroids do publish the amount of power they can handle. I will search out of curiosity what other people use for such high power as I am sure they have way more knowledge on that than I do and I get to learn something new as well. Good question you asked indeed. 73, YO6DXE. P.S. Maybe someone that knows will answer to the comment as well.

@@dxexplorer Thankyou for your swift reply!

@zsradioham Always a pleasure my friend.

Thank YOU as well for watching 🙏 73, YO6DXE.

Because I have a personal problem with anything that is SMD and I just hate them 🙈. Anything that is SMD or software / firmware based ( digital technology basically ) 😁. For that reason I prefer old school components and analog circuits only 😁. Is more like an unwritten rule for the DX Explorer projects to be as analog as possible 😁. 73, YO6DXE.

@dxexplorer 😮

@paulcohen1555 😁😁 it's a long story hehe.

@@dxexplorer Still you probably want to avoid the spiral cut metal film resistors as they will have noticeable inductance at RF. There are companies that still sell carbon composition resistors or you could use low inductance precision flat film resistors (lots of $). You could perhaps design this with SMD components on PCB with two standard shielding cans on the front and back with SMA connectors soldered to the edge of the board.

@KallePihlajasaari No SMD components allowed in my circuits 😁 ... rule number one on this channel haha. No SMD, nothing with firmware / software ... all old school analog. Doesn't have to be perfect as long as it works and doesn't create interferences 😁. About metal film resistors... not sure. As far as I know... they are the most recommended for HF. But out of curiosity ... I will try to build the version I was talking about towards the end of the video as well... no resistors needed for that one so it should perform better. 73, YO6DXE.

Ohh thanks so much. I am so happy I made it. It changed my world 😄😄. 73 buddy.