I think regens are cool because they use so few parts and still perform well. I just finished a direct conversion receiver. It works great, but there was a great deal more complexity. It's all fun. Keep making stuff !!!
Several years ago I had a breif online discussion with Mr K about this very circuit, according to him with minimal adjustments to biasing you can build this with any low signa low noise J-Fet. also the grounded base amplifier is there to isolate antenna and radio, both to avoid any antenna movement detuning a SSB or CW signal causing "sway" and avoiding any interference from a slightly oscillating receiver "broadcasting"
Yes that is totally true... on both subjects. I only have a little issue with the biasing at the moment. It doesn't seem right as the CW signals should sound really pleasant to my ears. But they sound somehow distorted now. Is like a signal that is not properly demodulated. I know that the tranzistor in this case also plays the role of a BFO at the same time as it does the other jobs. So I need to find the fine adjustment on the bias in order to make it sound as I please 😁😁. P.S. Is a great receiver though.
And soon I will hopefully have even more. I'm very happy too. I haven't been home in ages. I just go now and then to see if its all good, then I leave again. This week I finally return )) 73
Very good job! I read about a high sensitivity (roughly 1microVolt) of a BJT regen (transistor in barrier mode). But in regen there are usually only one LC circuit. Any LC circuit has poor selectivity , even quality is high. It means you will hear a more strong station even you tuned on a week station. In your receiver you have a capacitor with two sections. Try to add an additional LC selective circuit BEFORE input. It may be a coil - like in your regen, that would be located on 2-5 Inches from the main coil of the regen. Connect an antenna to part (or separate winding) of this additional coil. It much increase selectivity - especially in AM band.
@mohinderkaur6671 I will work on a DC receiver soon. For this particular design I have other plans... big ones 😁😁. 73, YO6DXE. P.S. Just waiting for the cold days to work on it.
@mohinderkaur6671 Is really nice. It has a good sensitivity. I was just not happy about the audio output. But I learned a think or two since I built it... so is time to make it sound great 😁.
Thank you so much. Glad you like it.... I also found it useful to have around. I use it for many projects... one little amp for many purposes ))) TH-cam videos on the phone now sound a lot better in a speaker )))
Ohh yes I will talk about it in this coming video. I want to post the second part about the receiver this week as later on I want to have some fun with an FT8 transceiver 😀😀😀 73
My pleasure. Ohh yes I will take care of the articles as well sometime this week. I had no time as I was running to finish my paperwork for the exam to get my license finally. 73
I really like regenerative receivers. I have not built one since 2010 and I wish I still had it and the design I used for it worked really well. I do have several, but not home built like the one from ten plus years ago & I plan to build another this winter along with SolderSmoke's Direct Conversion Receiver that they designed as a beginner's project. I pick up every 1970's stereo or radio I can find at a thrift store to harvest variable compacitors to use in projects such as this and for mag loop antennas. Good luck on your modification and future builds...73 & DE Kc2wvb.
Thank you so much and good luck to you as well with the receiver. I also want to try built that one from SolderSmoke. Maybe this winter I will have the time. 73, YO6DXE.
Hi I would like to build this receiver but I cannot find the schematic and board details on your website. I am interested how you found the solution to using the second variable capacitor. Thankyou
The board I had was a present received from one of my subscribers. I didn't had the time to make a design so I used that one to test the receiver. Give me about a week and I will make some time to design a PCB and write an article about it and describe there a few more things.
Hello! First and for most, nice built and the coil is very compact. I would like to have a look at the back of the pcb( you may have shown the back in this video but probably I didn't notice). For the variable capacitor, I have two of them and similarly I keep reusing them for my projects, the only solution is varicaps for diode tuning. Furthermore, diode tuning is cheaper and is more suitable for small projects. The receiver is actually very hard to tune for amateur operators because it covers a wide range of frequencies, making this to cover even more frequencies it will be nearly impossible to tune. The pcb must be redesigned as you said for such a small circuit the pcb is too big and maybe this is another factor which makes harder the tuning. For me if you want to add an audio amp stage, try using a td2002 instead of the lm386. To drive the td2002 you also need an one transistor amp stage before. The td2002 can drive a speaker easily without distortion. In conclusion, some modifications should be made for the circuit to operate better but for the first test it functioned quite well.
Thanks for watching Nikos. The PCB was really nicely done and designed as well. Its big indeed... but so is the coil )) I like the fact that Hendrik designed the PCB with ought the audio amp... so that gives me the freedom to pick the one I want. 73 my friend.
Hi Chip, thank you for the very interesting comparison. I have the Scout Regen from Pacific Antenna. It's the same circuit. I think I have all the regen radios that were released as kits. I love building regen radios! Recently I built a direct conversion receiver using a sampling detector (basically half a quadrature sampling detector). It works really well. Of course it does not eliminate the opposite side band but in practice it's no so bad. Looking forward to your sailing channel. I do get a chance to have a go in a sailing dinghy occasionally. Take care, 73, VK7IAN
Thanks so much Ian. I have a few more regens to build on the list. The Scout is one of them as well )) similar design indeed. Then as I was telling to Nigel in an earlier comment... I also want to jump on the direct conversion receivers as it gets boring building only regens haha. The one here in the video needs a few more adjustments made. Basically I recorded in the evening when the propagation was nice a few hours after finishing it. I'm sure it can do a lot better with a few more adjustments. Thanks so much again for watching. Maybe next week I have time to make a video for the sailing Channel too. And if things work well... maybe I do videos about amateur radio from a boat later on as I really want to be back on water. I miss it like crazy. I don't seem to get used to life on land after floating for nearly half of my life )) 73 and have a nice weekend.
I don't know to be honest. If I remember well qrpguys.com used to have something similar for sale... but I don't think they sell it anymore right now. This board was just a present from one of the subscribers to the channel.
Yes, unfortunately, qrp guys no longer has this kit available. Fortunately, they are offering the PSC boards for $10. You then download the manual from their web site, and build the radio, by supplying all of your own parts. I really wish they still had the kit available. It seems that no one else offers a regen rcvr kit anymore, so I guess we must make our own. I've had success building my own regents using vacuum tubes, such as 6SK7 and the smaller 12BA6. I'd run them with a plate voltage of 36 volts (four 9 volt batteries in series) and they sound just as good as the excellent receiver you show here on this TH-cam video. Like you, I LOVE regenerative receivers. You get a lot of bang for your buck.
Unfortunately yes is no longer availabe. No wonder as to be honest people these days prefere to build stuff based on Arduino and codes and all that fancy stuff. I prefer older analog circuits, so a regen for me will always make me happy way more than any "modern" digital thing.
Thanks so much Jerry. I kept it on two bands )) About 3 MHz up to 7.4 MHz. Just so I can have a little fun on the broadcast bands too as I miss my childhood times hunting for stations )). Works really nice so far for both amateur radio and also AM broadcast. Its all about how well you adjust that regen capacitor )). But so far I'm really happy about how it works. 73
Nunca he construido un receptor súper regenerativo todavía jaja. creo que es hora. Me gusta el receptor Sawdust y quería construir algo similar para ponerlo al lado de los transmisores CW simples que estoy construyendo y usarlos juntos para hacer QSO ))). 73 mi amigo.
I didn't write the blog article for this one yet. That is because I had no time to design the PCB board properly. Also I am trying to replace the coil with a toroid as well so it will be a little smaller. This big coil doesn't help much when you try to put the receiver in a smaller enclosure. But I will be working on this soon and post a video about it. The PCB board in the video was a present I received in the mail from one of the subscribers to the channel.
Thank you. It was a nice present from Hendrik... my amateur radio friend from Germany. Now I am working on a smaller and complete version of the receiver with audio amp. By the end of September I will post a video and the PCB design as well. 73, YO6DXE.
A"far pcb" is a. pcb made and sold by Far Circuits, in the USA (somewhere in Illinois). They have a web site that offers pcb for sale for many projects that were published over the years, in such magazines as Popular Electronics, QST, 73, etc.
Ahhhh ok. Thanks so much for the info. Then in this case the answer to the question is no. Is a PCB designed by my buddy Hendrik DK8HM and he sent me one to test it. 73, YO6DXE
This one no. I received it as a present. But next month I will have a bit of free time and design a new one and poste it on my PCBWay projects files for those that want to order one.
The PCB board was a present from a friend... but I want to redesign it for a toroid coul as is smaller and easier to build. Most probably at the end of February I will post a video on the new receiver and also write a blog post with a link for the PCB boards. Until then I have time to design one and do some tests. 73 my friend, YO6DXE.
Ciprian, I think Hendricks board seems a little bit more selective than Sputnik. I think we can all agree we've reached the point diminishing returns for a simple design. Very nice little coil there.Happy listening. You can try the MPF102 in place of the J310 should be no issues with biasing. Looks like you need more chinesium capacitors lol
Hahaha... yes for sure on both the capacitors issue.. and also I had enough of the Sputnik myself lol. I'm just going over the Sputnik now as I'm working on the blog article about the second version... and also I want to build the first one for myself as I first intended to. Just a tiny one. Meanwhile... indeed Hendrik designed a really nice board... and with the frequency counter and little bits and pieces I will soon ad to it... it will turn into a beast ))) I really love it. I do use the MPF102 you sent me. I did not had any J310. I think I only have three more regenerative receivers on my list of to do things.... and I'm done. I honestly had enough as they all seem to work the same. In performance I don't notice any difference.. nothing major at least. I'd like to play with a few direct conversion receivers next... and then get a little more sophisticated ))) 73 Nigel.
It is as built using the original schematic. But I think with minor changes and a few improvements... it can be a really great receiver. Of course... the same eternal problem when it comes to regen receivers, the selectivity won't be that great. In December I am planning on spending some time and work on a final version for this one. You will love it 😁😁. 73, YO6DXE.
dxexplorer.com/n1tev-radio-receiver Only one photo left of this receiver in the blog article. I unsoldered the components to do some modifications and tests for a future PCB design.
Hehe. Right now I only have the ones I built for myself unfortunately. Later on who knows... I may build one just to make a video about it and that I will not use after.
I mounted a radio exactly like this one but it doesn't work at all. I don't understand the reason because it regenerates well and receives the signal from a dip meter placed in the vicinity. 73 from BRASIL es DX Milton PY2CYE
That is strange. How big is the antenna ? At the time I made the video... I was using an EFHW for 40m and it was a bit overloaded with signal. Or maybe if there is no sound may be something with the audio amp ? 73, YO6DXE. P.S. I want to build another one like this but with the schematic a bit changed. Only that I don't have much free time for that right now.
Não mencione isso. Espero que consiga fazer funcionar normalmente. Dê uma outra olhada na montagem. Muitas vezes, por entusiasmo e impaciência de ver funcionar, cometo sempre um pequeno erro)))
I think regens are cool because they use so few parts and still perform well.
I just finished a direct conversion receiver.
It works great, but there was a great deal more complexity.
It's all fun.
Keep making stuff !!!
Thanks so much. And yes I agree. That is why I love regens as well. Great sensitivity too. Good luck with all your projects also. 73
Several years ago I had a breif online discussion with Mr K about this very circuit, according to him with minimal adjustments to biasing you can build this with any low signa low noise J-Fet.
also the grounded base amplifier is there to isolate antenna and radio, both to avoid any antenna movement detuning a SSB or CW signal causing "sway" and avoiding any interference from a slightly oscillating receiver "broadcasting"
Yes that is totally true... on both subjects. I only have a little issue with the biasing at the moment. It doesn't seem right as the CW signals should sound really pleasant to my ears. But they sound somehow distorted now. Is like a signal that is not properly demodulated. I know that the tranzistor in this case also plays the role of a BFO at the same time as it does the other jobs. So I need to find the fine adjustment on the bias in order to make it sound as I please 😁😁. P.S. Is a great receiver though.
@@dxexplorer indeed a good receiver to use.
Good to see this build and glad you are getting some time for radio now.
And soon I will hopefully have even more. I'm very happy too. I haven't been home in ages. I just go now and then to see if its all good, then I leave again. This week I finally return )) 73
Both radios are very nice.
I enjoy regen radios because it's fun fiddling with the dials trying to get the best signal.
I think you can tell already I love lots of knows )))
Yeah you are welcome 🤗
Wow.... that was fast ))) Thanks so much my friend. 73
Very good job! I read about a high sensitivity (roughly 1microVolt) of a BJT regen (transistor in barrier mode). But in regen there are usually only one LC circuit. Any LC circuit has poor selectivity , even quality is high. It means you will hear a more strong station even you tuned on a week station. In your receiver you have a capacitor with two sections. Try to add an additional LC selective circuit BEFORE input. It may be a coil - like in your regen, that would be located on 2-5 Inches from the main coil of the regen. Connect an antenna to part (or separate winding) of this additional coil. It much increase selectivity - especially in AM band.
Thank you. Ohh I should really try that. Is basically like a preselector and for sure is much better with that. God idea indeed.
try regen IF - a frequency converter using ne612 or something followed by regen IF reciever.
@mohinderkaur6671 I will work on a DC receiver soon. For this particular design I have other plans... big ones 😁😁. 73, YO6DXE. P.S. Just waiting for the cold days to work on it.
@@dxexplorer built the kk7b earlier, need to try this sometime
@mohinderkaur6671 Is really nice. It has a good sensitivity. I was just not happy about the audio output. But I learned a think or two since I built it... so is time to make it sound great 😁.
Very nice build, and the audio is excellent. I intend to build something similar for MW broadcast listening and this video is helpful. Best wishes!
Thank you so much. Glad you like it.... I also found it useful to have around. I use it for many projects... one little amp for many purposes ))) TH-cam videos on the phone now sound a lot better in a speaker )))
Can you do review for that smaller pcb, for which frequency display is designed for?
Ohh yes I will talk about it in this coming video. I want to post the second part about the receiver this week as later on I want to have some fun with an FT8 transceiver 😀😀😀 73
Thank you for fast reply, also looking forward for your antenna tuner article on your site. Keep up good work. Cheers😀
My pleasure. Ohh yes I will take care of the articles as well sometime this week. I had no time as I was running to finish my paperwork for the exam to get my license finally. 73
I really like regenerative receivers. I have not built one since 2010 and I wish I still had it and the design I used for it worked really well.
I do have several, but not home built like the one from ten plus years ago & I plan to build another this winter along with SolderSmoke's Direct Conversion Receiver that they designed as a beginner's project.
I pick up every 1970's stereo or radio I can find at a thrift store to harvest variable compacitors to use in projects such as this and for mag loop antennas.
Good luck on your modification and future builds...73 & DE Kc2wvb.
Thank you so much and good luck to you as well with the receiver. I also want to try built that one from SolderSmoke. Maybe this winter I will have the time. 73, YO6DXE.
Thanks for sharing - much appreciated... really enjoy your vids...
Thank you for watching. I really appreciate that. 73 my friend.
Hi I would like to build this receiver but I cannot find the schematic and board details on your website. I am interested how you found the solution to using the second variable capacitor. Thankyou
The board I had was a present received from one of my subscribers. I didn't had the time to make a design so I used that one to test the receiver. Give me about a week and I will make some time to design a PCB and write an article about it and describe there a few more things.
Hello! First and for most, nice built and the coil is very compact. I would like to have a look at the back of the pcb( you may have shown the back in this video but probably I didn't notice). For the variable capacitor, I have two of them and similarly I keep reusing them for my projects, the only solution is varicaps for diode tuning. Furthermore, diode tuning is cheaper and is more suitable for small projects. The receiver is actually very hard to tune for amateur operators because it covers a wide range of frequencies, making this to cover even more frequencies it will be nearly impossible to tune. The pcb must be redesigned as you said for such a small circuit the pcb is too big and maybe this is another factor which makes harder the tuning. For me if you want to add an audio amp stage, try using a td2002 instead of the lm386. To drive the td2002 you also need an one transistor amp stage before. The td2002 can drive a speaker easily without distortion. In conclusion, some modifications should be made for the circuit to operate better but for the first test it functioned quite well.
Thanks for watching Nikos. The PCB was really nicely done and designed as well. Its big indeed... but so is the coil )) I like the fact that Hendrik designed the PCB with ought the audio amp... so that gives me the freedom to pick the one I want. 73 my friend.
@@dxexplorer you can make
live stream if you have time with the receiver.
Maybe next weekend ... I'm not at home anymore. I only go back on Friday.
@@dxexplorer ok I understand.
good reception bro
Thank you. It will sound even better after a few more adjustments )) 73
Hi Chip, thank you for the very interesting comparison. I have the Scout Regen from Pacific Antenna. It's the same circuit. I think I have all the regen radios that were released as kits. I love building regen radios! Recently I built a direct conversion receiver using a sampling detector (basically half a quadrature sampling detector). It works really well. Of course it does not eliminate the opposite side band but in practice it's no so bad. Looking forward to your sailing channel. I do get a chance to have a go in a sailing dinghy occasionally. Take care, 73, VK7IAN
Thanks so much Ian. I have a few more regens to build on the list. The Scout is one of them as well )) similar design indeed. Then as I was telling to Nigel in an earlier comment... I also want to jump on the direct conversion receivers as it gets boring building only regens haha. The one here in the video needs a few more adjustments made. Basically I recorded in the evening when the propagation was nice a few hours after finishing it. I'm sure it can do a lot better with a few more adjustments. Thanks so much again for watching. Maybe next week I have time to make a video for the sailing Channel too. And if things work well... maybe I do videos about amateur radio from a boat later on as I really want to be back on water. I miss it like crazy. I don't seem to get used to life on land after floating for nearly half of my life )) 73 and have a nice weekend.
Hi there, nice video. Where can I buy this kit?
I don't know to be honest. If I remember well qrpguys.com used to have something similar for sale... but I don't think they sell it anymore right now. This board was just a present from one of the subscribers to the channel.
Yes, unfortunately, qrp guys no longer has this kit available. Fortunately, they are offering the PSC boards for $10. You then download the manual from their web site, and build the radio, by supplying all of your own parts. I really wish they still had the kit available. It seems that no one else offers a regen rcvr kit anymore, so I guess we must make our own.
I've had success building my own regents using vacuum tubes, such as 6SK7 and the smaller 12BA6. I'd run them with a plate voltage of 36 volts (four 9 volt batteries in series) and they sound just as good as the excellent receiver you show here on this TH-cam video. Like you, I LOVE regenerative receivers. You get a lot of bang for your buck.
Unfortunately yes is no longer availabe. No wonder as to be honest people these days prefere to build stuff based on Arduino and codes and all that fancy stuff. I prefer older analog circuits, so a regen for me will always make me happy way more than any "modern" digital thing.
Very, very nice video. 73's
Thank you so much. 73
Congrats ,keep it to one band , also how does it perform on AM SW ? Good work om, 73 ! Jerry K9UT
Thanks so much Jerry. I kept it on two bands )) About 3 MHz up to 7.4 MHz. Just so I can have a little fun on the broadcast bands too as I miss my childhood times hunting for stations )). Works really nice so far for both amateur radio and also AM broadcast. Its all about how well you adjust that regen capacitor )). But so far I'm really happy about how it works. 73
Un fenómeno la radio superregenerativa es la DIVA jajaj me quiero armar una esta super!!!.
Nunca he construido un receptor súper regenerativo todavía jaja. creo que es hora. Me gusta el receptor Sawdust y quería construir algo similar para ponerlo al lado de los transmisores CW simples que estoy construyendo y usarlos juntos para hacer QSO ))). 73 mi amigo.
Schematic and PCB files still missing.
I didn't write the blog article for this one yet. That is because I had no time to design the PCB board properly. Also I am trying to replace the coil with a toroid as well so it will be a little smaller. This big coil doesn't help much when you try to put the receiver in a smaller enclosure. But I will be working on this soon and post a video about it. The PCB board in the video was a present I received in the mail from one of the subscribers to the channel.
wonderfull
Thank you. It was a nice present from Hendrik... my amateur radio friend from Germany. Now I am working on a smaller and complete version of the receiver with audio amp. By the end of September I will post a video and the PCB design as well. 73, YO6DXE.
is that a far pcb
I did not understood the question ))
@@dxexplorer us ckt brd far circuirs kg6mn
A"far pcb" is a. pcb made and sold by Far Circuits, in the USA (somewhere in Illinois). They have a web site that offers pcb for sale for many projects that were published over the years, in such magazines as Popular Electronics, QST, 73, etc.
Ahhhh ok. Thanks so much for the info. Then in this case the answer to the question is no. Is a PCB designed by my buddy Hendrik DK8HM and he sent me one to test it. 73, YO6DXE
Great
I hope this month, if not the next... I will have time for a final version of this one. 73, YO6DXE.
Can the pcb be purchased
This one no. I received it as a present. But next month I will have a bit of free time and design a new one and poste it on my PCBWay projects files for those that want to order one.
i love classic chinese music
I do too. Not just Chinese, all good old music seems nice from all over the world. As they say... old is gold 😁.
Gimana caranya dapatkan pcb
The PCB board was a present from a friend... but I want to redesign it for a toroid coul as is smaller and easier to build. Most probably at the end of February I will post a video on the new receiver and also write a blog post with a link for the PCB boards. Until then I have time to design one and do some tests. 73 my friend, YO6DXE.
أهلاً وسهلاً ومرحباً-يتعذر التعليق-لا أعلم .
Hello... I don't know why it doesn't work. 73 DE YO6DXE.
Ciprian, I think Hendricks board seems a little bit more selective than Sputnik. I think we can all agree we've reached the point diminishing returns for a simple design. Very nice little coil there.Happy listening. You can try the MPF102 in place of the J310 should be no issues with biasing. Looks like you need more chinesium capacitors lol
Hahaha... yes for sure on both the capacitors issue.. and also I had enough of the Sputnik myself lol. I'm just going over the Sputnik now as I'm working on the blog article about the second version... and also I want to build the first one for myself as I first intended to. Just a tiny one. Meanwhile... indeed Hendrik designed a really nice board... and with the frequency counter and little bits and pieces I will soon ad to it... it will turn into a beast ))) I really love it. I do use the MPF102 you sent me. I did not had any J310. I think I only have three more regenerative receivers on my list of to do things.... and I'm done. I honestly had enough as they all seem to work the same. In performance I don't notice any difference.. nothing major at least. I'd like to play with a few direct conversion receivers next... and then get a little more sophisticated ))) 73 Nigel.
I think it's very squeaky, hard to tune to SSB.
It is as built using the original schematic. But I think with minor changes and a few improvements... it can be a really great receiver. Of course... the same eternal problem when it comes to regen receivers, the selectivity won't be that great. In December I am planning on spending some time and work on a final version for this one. You will love it 😁😁. 73, YO6DXE.
am observat numele tau, esti roman ? edit, acum am observat indicativul tau, te salut !
Salut. Da da Roman cum sa nu 😁 73, salutari de la Prejmer - Brasov.
ارسل لي صوره من المكونات في الدئره
dxexplorer.com/n1tev-radio-receiver
Only one photo left of this receiver in the blog article. I unsoldered the components to do some modifications and tests for a future PCB design.
Bro... is it possible to send me an SW receiver for me 🥰
Hehe. Right now I only have the ones I built for myself unfortunately. Later on who knows... I may build one just to make a video about it and that I will not use after.
I mounted a radio exactly like this one but it doesn't work at all. I don't understand the reason because it regenerates well and receives the signal from a dip meter placed in the vicinity. 73 from BRASIL es DX Milton PY2CYE
That is strange. How big is the antenna ? At the time I made the video... I was using an EFHW for 40m and it was a bit overloaded with signal. Or maybe if there is no sound may be something with the audio amp ? 73, YO6DXE. P.S. I want to build another one like this but with the schematic a bit changed. Only that I don't have much free time for that right now.
@@dxexplorer TKS fer elucidation.
Não mencione isso. Espero que consiga fazer funcionar normalmente. Dê uma outra olhada na montagem. Muitas vezes, por entusiasmo e impaciência de ver funcionar, cometo sempre um pequeno erro)))