Category: DC Receiver Build

Dan KF5DAN’s FB SolderSmoke Direct Conversion Receiver

It is a happy occassion whenever we get to announce a new member of the SolderSmoke Direct Conversion Receiver Hall of Fame. And Dan KF5DAN has entered the hallowed halls. Congratulations Dan. We are really glad you are doing the happy dance. Above you can see Dan’s receiver inhaling SSB, in the video below you see it receiving CW.

Dan writes:

I would like to present proof of life! I found the motorboating issue in my amplifier. R18, 1K resistor was connected from the power rail to the base of Q5, instead of the collector. I moved it, and had already added a 470uF cap from earlier troubleshooting. There is a lot of noise, probably due to some stormy weather in Arkansas this evening. I’m doing the happy dance over here.
Thank you very much! I am very appreciative of all the guidance and suggestions everyone has provided. I am very happy to be in this group of hams and homebrewers.

Alan W2AEW Measures the Minimum Discernible Signal (MDS) of the SolderSmoke Direct Conversion Receiver

So cool that Alan did this. Here we see a rigrourous measurement of the MDS of our receiver, with a correction for the bandwidth. Very nice.

It can discern signals down to -125 dbm. I think that is pretty good for simple receiver like this.

Alan agrees that another way to do the sensitivity test is to just listen for the band noise when you connect and disconnect the antenna. Especially on the low HF bands, if you can hear it, you have sort of maxed out on receiver sensitivity.

Thanks Alan!

Hack-A-Day on the Tao of Bespoke Electronics

https://hackaday.com/2025/06/25/the-tao-of-bespoke-electronics/#comment-8142333

My comment: Good post with good points about the under-appreciated differences between true homebrew and kit building. I have a lot of Heathkits around me, but I never considered them to be homebrew. There is a big difference. We have been promoting and supporting the HOMEBREW construction of 40 meter direct-conversion receivers. No one would confuse these receivers with commercial, or even kit-built gear. But they work very well, and the builder earns the satisfaction that comes with building something from scratch. There are no factory made PC boards to “populate.” All four of our boards are made using Manhattan construction techniques (super glue, isolation pads, copper-clad substrate). Almost 90 receivers have been completed, in more than 15 countries. Check out the receivers. Build one if you dare:

https://soldersmoke.blogspot.com/search/label/DC%20RX%20Hall%20of%20Fame

BTW — I own a Dymo machine, and my SSB transceivers are in wooden boxes made from junked packing material. 73 Bill N2CQR

WD4CFN Makes Contact Using the SolderSmoke Direct Conversion Receiver and a Michigan Mighty Mite

Hall of Fame member Steve WD4CFN in Tennessee fired up his 40 meter Mchigan Mighty Mite (above) and made contact with ND4K in Georgia. FB Steve. Congratulations OM!

My Eleven Contacts using the SolderSmoke Direct Conversion Receiver — It is NOT a toy!

I have made 11 contacts using the SolderSmoke Direct Conversion receiver. Ten of the 11 were after June 3, 2025. This was in very casual operation, operating with less than 1 watt with a dipole antenna.

Alan W4AMV

1. The first of course was back in February 2023 with W4AMV. On this one I was using a simple “10 Minute Transmitter” that I threw together thinking that I would use it to demonstrate the receiver to our high school students. “Wait a minute,” I thought. I called CQ and W4AMV answered. I was running about 100 mW. He too was using homebrew gear. https://soldersmoke.blogspot.com/2023/02/first-qso-with-high-school-receiver-100.html

2, 3, 4. On June 4, 2025 I again fired up the 10 minute transmitter. My T/R scheme was VERY simple: I have an MFJ coax switch that I use to select the rigs that will connect to my various antennas. On the antenna switch I selected my 40 meter dipole. I ran two pieces of coax from two different positions on the MFJ switch. One I marked RX, the other TX. The transmitter and the receiver were working off 9 volt batteries. I quickly worked N2WJW. Gil in New Jersey. But I noticed that the 10 Minute rig was drifting. So I pulled out my trusty old Tuna Tin 2 transmitter and used it to heartlessly replace the 10 Minute Transmitter. Now with SEVERAL HUNDRED milliwatts, I worked W2XS, John in New York on June 5, 2025. Later that same day I worked N9FGC in Indiana.

K1OA’s Rig

5. My most amazing contact came on June 7, 2025. Here is my log entry: 40CW K1OA First 2 way contact with station also using a SolderSmoke DC Receiver!At around 0630 EDT on June 7, 2025 I heard K1OA calling CQ on 7030 kHz CW. This was exactly where I had a crystal. I called him, but he didn’t hear me. I sent him an e-mail. We tried again — he heard me calling him and I heard him responding by calling me, but I don’t think we succeeded in exchanging signal reports. It was close, but no cigar. I had to walk the dog. Scott and I agreed to meet on 7030 kHz at 0730 EDT. Arggh. There was a QSO there. I thought we might have to try to change frequency, but this would have been tough because both of us were crystal controlled on transmit. Fortunately, the contact on 7030 kHz wrapped up. Scott called me, I responded, and we were able to exchange signal reports. I was so excited that I almost forgot to hit the record button on my phone. But I caught the last minute or so.This was really something. This really goes to prove what Dean and I have been saying all along: this receiver is not a toy! It can be used for real ham radio contacts. And now we have had these receivers on both ends of a contact. For transmit, Scott was using a KA4KXX transmitter with about 3 watts output. I was on my Tuna Tin 2 at about half a watt output.

Jim W1PID


6, 7, 8. Later on June 7, 2025 I worked an old friend, Jim W1PID. Jim is a friend of Homebrew Hero Mike AA1TJ, and was involved in Mike’s effort to cross the Atlantic with a voice-powered rig. Jim also was one of my contacts with the ET-2 QRPppp rig. I also worked WZ2J Vin in NJ. I also worked John W2XS again.

Mike WB8VGE

9. June 11, 2025 (Really evening of 10 June 2025) Famous homebrewer, Anchorologist, Heatkit authority and fellow member of the QRP Hall of Fame Mike Bryce called me! 40CW 0034 WB8VGE Mike Bryce came back to my CQ! Mike wrote: Nothing like quartz locked frequency control!You know it sounded pretty damn good at 500mW. You were holding your own until QSB would take you out in a deep fade. But all in all, one hell of great QRP QSO.I was running my Ten Tec Scout that I had just put back together a couple of days ago. Got around to putting the case back on it tonight, and had it cooking in the back ground just listening to the stations come and go. I had worked a few POTA stations near by and found a quite spot. I was working on a project when I heard your CQ through the din of the 40M band. Glad I took a break and worked your QRPp signalbest 73 QRP # 4816 You get a QSL for that QSO!

Here’s my post about Mike, WB8VGE: https://soldersmoke.blogspot.com/2018/09/wb8vge-on-qso-today-qrp-hb-boatanchors.html

10. Around June 11, 2025 I worked W4MY in a contest.

11. On June 12, 2925 I worked some DX with the rig. It was VA3ICC, Ian in Ontario.

Ian VA3ICC
All of this reinforces something that Dean KK4DAS and I have been saying all through this build process: this little DC receiver is not a toy. It can be used as a serious ham radio receiver and it can — even when paired up with a very low-power crystal-controlled transmitter and a simple antenna — make some great ham radio contacts.

Mike KM5Z’s SolderSmoke Direct Conversion Receiver

Congratulations to Mike KM5Z on the completion of his SolderSmoke Direct Conversion Receiver.
Welcome to the Hall of Fame.

Mike writes:

First time with ‘Manhattan’ style construction, although it worked perfectly and was very easy. In this video I just did a scan from about 7.100 to 7.210 MHz. As you can see, I took advantage of another ham’s 3D prints.
After all, if an idea is worth doing, then… it’s worth overdoing.I used a Milwaukee 1/4″ Diamond Max hole saw to cut circles for the solder-points. Everything else is ground. Later, I found that I missed a point, so I used a single “MePAD” glued in that spot.I found the default audio amp to be a bit quiet. I plan to replace it with the ‘push-pull’ version. I’m definitely keeping this to hang up on the wall.

Steve WD4CFN’s FB Mid-Tennessee SolderSmoke Direct Conversion Receiver

Steve WD4CFN has built a FB SolderSmoke Direct Conversion Receiver. CW reception video appears above.

From his QRZ page: “I also enjoy QRP. A group of us have started a local QRP club this year, MidTN QRP Group. (https://groups.io/g/MidTNQRP). “

Steve writes:

I finished my SS DCR tonight and connected an antenna. Lots of summer QRN, but also lots of signals. Thank you and Dean for all the work you guys put into this project. It is so well done and documented. The whole project has been a great learning experience, especially the mixer part. I haven’t built a diode ring mixer before, just used the SA602/SA612 type mixer. Testing the mixer pushed me to better understand how to use the FFT function of my scope to make sure the mixer was working correctly. This was a great project! Thanks to all.

Here is Steve’s receiver inhaling SSB:

Congratulations Steve. Welcome to the Hall of Fame.

Rick W1DSP’s FB SolderSmoke Direct Conversion Receiver — Exploring the Rabbit Holes


Thanks to Rick W1DSP for sending us his “proof of life” video. It is indeed alive! Congratulations Rick! Welcome to the Hall of Fame!

Rick writes:
Here’s another SS DCR proof of life video. I took a bunch of detours on the way to get here – redesigned the coil former to add a fixed coil (learned openscad), spent a bunch of times on the DCR classics (KK7B, W7EL designs), acquired parts to build the original KK7B DCR, and so on. This is the sort of project that’s a perfect excuse to explore all the sorts of rabbit holes we hope to find along the way to completing a project. Thanks for a great project. I’d just like to add that you’re building a great community of experimenters. Most excellent, sir! Thanks to Bill & Dean!

Phil W1PJE, Director of MIT’s Haystack Observatory, visits SolderSmoke East, Talks Radio with N2CQR and KK4DAS

We were very pleased that Phil W1PJE was able to visit yesterday. Phil is the Director of MIT’s Haystack Observatory. He is very knowledgeable on topics related to space and space technology. He is also a member of the SolderSmoke Direct Conversion Receiver Hall of Fame. We talked about the history of the Haystack Observatory, famous antennas (dishes), and about the SolderSmoke Direct Conversion receiver project. It was a lot of fun talking to Phil. We managed to shoot this video with him. Thanks Phil and thanks Dean.

A FIRST! K1OA Contact with N2CQR — All Homebrew with SolderSmoke Direct Conversion Receivers on Both Ends

At around 0630 EDT on June 7, 2025 I heard K1OA calling CQ on 7030 kHz CW. This was exactly where I had a crystal. I called him, but he didn’t hear me. I sent him an e-mail. We tried again — he heard me calling him and I heard him responding by calling me, but I don’t think we succeeded in exchanging signal reports. It was close, but no cigar.

I had to walk the dog. Scott and I agreed to meet on 7030 kHz at 0730 EDT. Arggh. There was a QSO there. I thought we might have to try to change frequency, but this would have been tough because both of us were crystal controlled on transmit. Fortunately, the contact on 7030 kHz wrapped up. Scott called me, I responded, and we were able to exchange signal reports. I was so excited that I almost forgot to hit the record button on my phone. But I caught the last minute or so. See above.

This was really something. This really goes to prove what Dean and I have been saying all along: this receiver is not a toy! It can be used for real ham radio contacts. And now we have had these receivers on both ends of a contact. For transmit, Scott was using a KA4KXX transmitter with about 3 watts output. I was on my Tuna Tin 2 at about half a watt output.

Thanks Scott! And thank you Walter!

Alan Wolke W2AEW’s Build of the SolderSmoke Direct Conversion Receiver

We were already very proud to put Alan Wolke W2AEW in our Hall of Fame. But Alan put icing on the cake this morning by making his own video about his build, along with some pre-CME video of the machine inhaling CW and SSB (see above). The SSB is DX, from France. FB Alan, thanks.

My only comment to Alan was on the frequency readout. I noted that many builders had resorted to San Jian PLJ frequency counters. A few others had done what he did and used the frequency readout feature of their Tiny Spectrum Analyzers. I told him that at first I had gone very low tech. It was in fact, quite barbaric. Check it out:
I think it is kind of low-tech cool. I am a bit disappointed that none of the builders have done anything similar. Mark KI5SRY came the closest, but his solution was relatively spophisticated. Look, it is not to late. Get out those index cards and calibrate those screws! Send in pictures or videos.

Ashish N6ASD’s Beautiful SolderSmoke Direct Conversion Receiver — Built in Bangalore — “This was such a fun project. This was my first direct conversion build, and I learned a lot along the way.”

Ashish N6ASD is a really good guy. We started watching his projects when he was in San Francisco. He does a lot of fundamental radio building. And he is a friend of Homebrew Hero Frank Harris K0IYE.

When I spotted a “thumbs up” from an N6ASD on the SolderSmoke Discord channel, I knew that we would soon have yet another Bangalore Direct Conversion Receiver. Ashish has been in contact with both Farhan and Ramakrishnan. FB.

Ashish writes: I finally finished building the receiver! This was such a fun project. This was my first direct conversion build, and I learned a lot along the way. The biggest challenge was finding stable capacitors for the oscillator. In my first attempt, I used whatever I had in my junk box, but those capacitors drifted all over the place. Mica caps seemed expensive and difficult to get in Bangalore. I ended up buying surface-mount NP0 capacitors instead. Soldering them was a hassle, but they are much cheaper and easier to get here. Next step will be more mods and experimentation! The first improvement will be in the BPF. I will replace the regular ceramic caps with NP0 caps and re-tune it.

Here is Ashish’s receiver inhaling CW:

Congratulations Ashish — Welcome to the Hall of Fame!

Ashish N6ASD
The resemblance between Ashih’s photo and the famous
1818 painting by Caspar David Friedrich is completely coincidental,
but quite remarkable.
https://en.wikipedia.org/wiki/Wanderer_above_the_Sea_of_Fog

Not a Toy! K1OA Making Contacts with the SolderSmoke Direct Conversion Receiver and a KA4KXX Transmitter

This goes to prove what we have been saying all along: this receiver is not a toy! It is capable of operating as part of a real 2-way ham radio station. Hall of Fame member Scott K1OA has paired his receiver up with a Merry Christmas transmitter designed by Walter KA4KXX and has been making CW contacts with it (see above). Walter supplied the crystal and many of the needed parts. Scott has already worked WA9RNE, N4HAY and W3RJ, and has tried making contact with Walter but no luck yet. He has gotten RBN reports from Germany and New Zealand. All that with just 3 watts.

This is not the first time this receiver has been out to use. I made one contact with it using a “Ten Minute” QRPp transmitter that I had intended only to use for test purposes:

https://soldersmoke.blogspot.com/2023/02/first-qso-with-high-school-receiver-100.html

HoF member Aaron ZL1AUN used his receiver with an SSB transmitter to make contact using his receiver:

https://soldersmoke.blogspot.com/2025/02/soldersmoke-direct-conversion-receiver_23.html We understand Aaron’s article about the receiver has been published in “Break-In” magazine — we hope to get a copy (electronic would be fine!)

And who can forget HoF member Nate KA1MUQ who turned his “frying pan” direct conversion receiver into a double sideband transceiver and used it to make phone contact with Idaho from California:

https://soldersmoke.blogspot.com/2025/03/nate-ka1muq-turns-his-frying-pan-dc.html

If anyone is aware of other contacts made using this receiver, please let me know.

Hiss, Filters, QRM, and Hearing Loss: Do we need AF filters in direct conversion receivers?

L6 is the 88mH toroid

Messages on Discord about the need to knock down higher frequency audio response in the SolderSmoke direct conversion receiver got me thinking.

I agree with Rick Campbell and others on the benefits of hearing a “wide open” direct conversion receiver. But Rick and others have built DC receivers with 3 kHz low pass AF filters. This made me ask myself a question: Is an audio filter in a direct conversion receiver a good idea?

And I started wondering if perhaps I was being too dismissive about the complaints about high frequency audio — I had been attributing them to newcomers who were just unaccostomed to radio noise or “static.” But maybe there was more to it than that. Maybe a big part of the problem was in my head, specifically in my ears. So this morning I did an experiment. I took an online hearing test. First, without my hearing aids: As expected, it showed significant high frequency loss. (It was as if the US Army had installed a 3 kHz audio low pass filter in my head!) Then I put my hearing aids in and retook the test: This time I passed the test and showed no loss. I then listened to the DC receiver with my hearing aids in. Now I could hear what builders on the Discord server were commenting on: I could hear higher frequency hiss, and, more importantly, stations that were producing 4-5 kHz sounds on my speaker were audible and annoying.

So I went back to Wes Hayward’s November 1968 QST article. In his receiver, he has a low pass AF filter using an 88 MILLIHenry coil and a couple of capacitors to ground. I had a few of the coils (given to me years ago by a NOVA QRP club member) so I built it. With my hearing aids in, I noticed an immediate improvement. I then did what one of the Discord builders did and put the filter in with a switch that would let me make “with and without” comparisons. The filter definitely cuts down on any AF above about 3.5 kHz. And it doesn’t seem to do damage to the desired signal. This is useful. I left the W7EL diplexer in the circuit.

This filter won’t solve the image or “opposite sideband” problem inherent to simple DC receivers, but it will help with signals or noise that are producing tones above about 3.5 kHz in the receiver. I think this is especially important in countries in which there is a lot of SSB crowding on 40 meters. The UK, for example, has an allocation from 7.0 to 7.2 MHz. In the US we go from 7.0 to 7.3 MHz. That is a big difference.

So the answer is probably yes, an AF filter in a direct conversion receiver is probably a good idea, especially if you can switch the filter out of the receiver. You can live without these filters. Not having the filter keeps the receiver very simple, and lets it sound really great. But having the filter in there does help reduce interference and high frequency hiss. So I think this is a useful add-on mod for builders who see a need to cut down on the kind of interference that a lack of this filter causes.

In 2019 W7ZOI noted: “Another unusual element is the 88 mH toroid used in the audio low pass filter at the detector output. A viable substitute would be a 100 mH inductor with radial leads. The muRata 19R107C (from Mouser) should work. Bourns also offers a variety of similar parts.”

Kevin K3IY’s Beautiful FB SolderSmoke Direct Conversion Receiver: “An amazing experience… A milestone for me…”

Kevin’s receiver was beautifully built. And it sounds great. Congratulations Kevin, and welcome to the Hall of Fame.

Kevin writes:

This was my first “real” homebrew project. I’ve built a few kits and toyed with some basic circuits, but this is a milestone for me. It wasn’t without some troubles but what an amazing experience. I couldn’t get my oscillator to work and the issue was I tried to make due with two 680pF ceramic caps. I took Dean’s advice to stick with the 330pF silver mica’s and I found my signal. At this point I also broke down and bought an oscilloscope. I now plan to do some mod’s and eventually build a TR switch and pair it with a transmitter. I can’t thank Bill and Dean enough for making this an obtainable goal. Kevin, K3IY

Kevin’s receiver on CW (above) and SSB (below).
He’s thinking about his receiver

Chuck N4AVC’s FB SolderSmoke Direct Conversion Receiver: “I enjoyed the build and testing.”

Chuck N4AVC’s use of the frequency counter in his digital multimeter is pretty cool and innovative. And it is nice to have yet another receiver in Virginia; he is down in the Richmond area. And of course the Sharpie callsign tattoos on the wooden board are really nice.

Chuck writes:

Completed!!! For Pete: “She ain’t pretty, but she sure can cook!”. Thanks Bill and Dean, I enjoyed the build and testing. It’s funny, the audio oscillates on an older 9v battery, but is clean on the 9.5v bench supply. Going to put Bill’s mod on the inductor to make tuning a little finer and spread the boards out a little more. I used the double sided boards I had and there is some interaction between the boards.

Congratulations Chuck! Welcome to the Hall of Fame!


Paul WA1MAC GETS DOWN TO BRASS TACKS with his FB GLUE STICK SolderSmoke Direct Conversion Receiver

Wow, look at that beautiful build of the SolderSmoke Direct Conversion Receiver. We haven’t received a “proof of life” video from Paul yet, but we trust that his receiver does in fact work. Paul has some heavy care-giver responsibilities that keep him in his home. We do not want to complicate his life by asking for outside antennas or videos.

We are also not going to complicate Paul’s life my insisting that he build it our way. First, his life is already complicated enough, and second, the innovations he introduced are really cool. The use of brass tacks and conducive copper tape is really ingenious. And the glue stick has brought him to the Joy of Oscillation (JOO). In fact the glue stick has given him JOVO — the Joy of Variable Oscillation. FB Paul.

Paul writes:

Hi guys

I’ve been gettin down to brass tack here at the mac-shack! Fits in nicely within my new caregiver role.
Been having a ball with the brass thumbtack breadboarding from SPRAT on your DC Receiver challenge!
Gluestick PTO, check, alive with the joy of oscillation!
BPF, check (need to tune once I find the nano VNA here somewhere)
DBM and diplexer, check, there was room on the board left over so I cheated and snuck the BPF on that board too
3 BJT audio amp with transformer, check, alive and passes the finger test, loudly!
Since I currently have no 40m antenna here guess it’s time to finally put that active antenna I’ve been meaning to build…………Any how thanks for all the fun and hair pulling, oh wait, I’m already bald!
73
Paul WA1MAC, get it the mac-shack 🙂
JOVO!
Glue Stick!
Brass tacks!
Congratulations Paul! Welcome to the Hall of Fame!

Ted KN4ZXG’s FB SolderSmoke Direct Conversion receiver: “This project is the greatest gift to homebrewing…”

There it is, a thing of beauty. The best part is that Ted built this receiver himself. That is something that most hams NEVER do.

Ted writes:

This project is the greatest gift to homebrewing since I got interested in radio nearly a decade ago. Lot’s of great projects out there but most go into a mysterious black hole of obsolete parts like the NE612 mixer that’s hard to get, or even the LM386, which is plentiful but not as cool as this amp. Everything’s divided neatly on it’s own board and explained. The builder has wiggle room on the layout and ways to test each module whether that’s with nice or budget equipment. Not only did I learn a ton about each stage, but also about making RF probes and making use of my modest but super useful equipment like the Nanovna. Although there were no mysteries, it all comes together to make magic. If you know stuff, you can do stuff! Thanks again de KN4ZXG, Ted.

While he has some great plans for modifications and improvements, at this point I think Ted should follow Farhan’s advice and spend some time just listening to the receiver that he has built. Direct conversion receivers sound especially good. It is as if they are closer to the ether.

Here are some clips of Ted’s receiver in action:

Congratulations Ted. Welcome to the Hall of Fame.

Mitch NK3H’s FB SolderSmoke Direct Conversion Receiver — “Incredibly satisfying!”

Wow, Mitch NK3H has built a really nice receiver. (He says it is not pretty, but those of us who have built one or who are in the process know that it looks great.) The SSB really sounds good also.

Mitch writes:

It’s not pretty but it works! Incredibly satisfying. In answer to the questions, (1) though I ‘d built a few small Manhattan style boards (e.g., Michigan Mighty Mite) this was more complicated. I’ve been using W1REX’s island cutter to create isolated areas on the copper clad board, rather than pasting on pieces of circuit board. But the islands are a little small for as many as four connections on one island, as in most of the transistor bases. Inevitably a component lead would inadvertently contact the ground plane and all bets were off. Tracking down the shorts was challenging. (2) Once I got to the audio amplifier board I carefully laid out all of the components before starting to solder. But as I finished each stage and was ready for the next, I always seemed to be missing a resistor or two. I’d search the desk and the floor — very frustrating. Turns out the speaker magnet was collecting and hiding the missing resistors. Lesson learned. (3) Next I’m hoping to build a transceiver. Still looking for the right project, probably a little more digital than this wonderful DCR.

Mitch obviously learned a lot during this project. I had similar experiences with pads on the same level as the surrounding board — I found that the 1 or 2 mm of elevation provided by the Manhattan pads prevented a lot of inadvertent shorts to ground. And I too “lost” (temporarily) a lot of components to the magnet in the speaker.

Good luck with the next projects Mitch. With the Michigan Mighty Mite and the DCR under your belt you are ready to go. Maybe a Double Sideband transmitter to go with the DCR? Or, as you said, perhaps something more digital. There is a lot of good ham experience with the Si5351 digital VFOs. Or maybe even an SDR rig.

Thanks Mitch. Congratulations and welcome to the Hall of Fame.

———————–

Join the discussion – SolderSmoke Discord Server:

https://discord.gg/Fu6B7yGxx2

Documentation on Hackaday:

https://hackaday.io/project/190327-high-schoolers-build-a-radio-receiver

SolderSmoke YouTube channel:

Bill K7WXW’s FB SolderSmoke Direct Conversion Receiver

This is a very nice build. Bill K7WXW fought a long battle to get this receiver working, and — more importantly — to understand why it is working.

Bill writes:

  1. The cycle of design, sim, build, debug, update, repeat can teach you a lot.


FB Bill. Welcome to the Hall of Fame!

Join the discussion – SolderSmoke Discord Server:

https://discord.gg/Fu6B7yGxx2

Documentation on Hackaday:

https://hackaday.io/project/190327-high-schoolers-build-a-radio-receiver

SolderSmoke YouTube channel: