Serving the worldwide community of radio-electronic homebrewers. Providing blog support to the SolderSmoke podcast: http://soldersmoke.com
Podcasting since 2005! Listen to Latest SolderSmoke
Thursday, January 1, 2026
Walter KA4KXX's Innovative 20-meter SolderSmoke Direct-Conversion Honorable-Mention Receiver
Tuesday, December 23, 2025
Pete N6QW Asks Copilot about Homebrew vs. Store Bought
Copilot is remarkably perceptive. This AI-generated message really explains very well the differences between homebrew and store bought gear.
Check out Pete's blog: https://n6qw.blogspot.com/2025/12/mostly-ai-generated.html
Homebrew vs Store Bought
There’s a moment every homebrewer knows: you shove aside the archaeological layers of past projects on the bench, uncover a few resistors stuck to a solder blob, and declare, “Yep, this is going to be a radio.” To the untrained eye, it looks like the aftermath of a nuclear explosion. But to the enlightened? It’s the beginning of greatness — or at least something that won’t catch fire too quickly.
Buying a radio is easy. Too easy. You click a button, a box arrives, and suddenly you’re the proud owner of a rig that has more menus than a chain restaurant. You spend the first week scrolling through settings trying to figure out why the audio sounds like a kazoo trapped in a tin can. But building a radio? That’s where the real fun begins. It’s where you learn that “datasheet recommended values” are merely suggestions and that toroids exist solely to test your patience and your vocabulary.
Commercial radios are sleek, polished, and packed with features you’ll never use but will brag about anyway. They’re also sealed tighter than a politician’s tax returns. You can’t poke around inside without voiding the warranty, the warranty’s warranty, and possibly a few federal regulations. Meanwhile, a homebrew rig practically begs you to poke it with a screwdriver. It’s the difference between owning a sports car you’re not allowed to open the hood on and owning a jalopy you can rebuild with duct tape and optimism.
And let’s be honest: building a radio is an act of rebellion. In a world where everything is prepackaged, preprogrammed, and pre‑approved, choosing to melt solder and wind toroids is basically saying, “I reject your consumerist convenience and substitute my own chaos.” It’s a declaration that understanding matters. That learning matters. That the journey — the mis-wired stages, the smoke tests, and the moment you realize you soldered the IC in backwards — is part of the joy.
There’s also something deeply personal about a homebrew rig. When you build it, you know every quirk. You know why the VFO drifts when the cat walks across the table. You know why the audio chain hisses like an angry snake. You know the exact moment when the rig came alive for the first time, pulling a faint signal out of the ether and making you shout, “It works!” loud enough for the neighbors to wonder if you’ve finally snapped.
And that first QSO? Pure magic. When someone hundreds or thousands of miles away responds to your signal, you feel a surge of pride no store‑bought rig can match. You didn’t just operate a radio. You created one. You made electrons dance to your tune. You built a bridge across the airwaves using nothing but determination, caffeine, and parts that probably came from a cardboard box labeled “misc — maybe useful someday.”
Homebrewing also keeps the spirit of amateur radio alive. The hobby wasn’t built on buying the latest rig because the brochure said it had “enhanced DSP algorithms.” It was built on people who asked, “What if?” and then went to the bench to find out. When you build a radio, you’re participating in that legacy. You’re keeping the flame lit — even if the flame occasionally comes from a resistor, you accidentally overheated.
And let’s not forget the best part: when something breaks, you can actually fix it. No shipping it back to the manufacturer. No waiting six weeks for a repair estimate. No customer service rep telling you to “try turning it off and on again.” You grab a meter, poke around, and mutter, “Well, that shouldn’t be glowing,” and you fix it. That’s power.
Sunday, December 21, 2025
Frank Jones W6AJF on Homebrew, Thermatrons, and VHF
Thursday, December 11, 2025
Homebrew Radio from Southern India
Saturday, November 1, 2025
Another GREAT Book -- L.B. Cebik, W4RNL's "Seven Steps to Designing your Own Ham Equipment" - 1979 - FREE!
Thanks to Walter KA4KXX for alerting us to this gem of a book. L.B. Cebik is best known as an antenna guru. I did not know that he also did a book on the homebrewing of rigs.
Here is the URL: https://archive.org/details/sevenstepstodesi0000cebi/page/n2/mode/1up Just click on the "borrow" box and you can look at the whole thing. Thanks too to the Internet Archive for preserving this important piece of ham literature.
I was a bit apprehensive when I saw "designing" in the title. We have talked about how, all too often, modern hams seem to challenge the homebrew nature of our rigs by asking if we had "designed" it ourself. "Well," I answer, "I did not invent the Colpitts oscillator, nor the common emitter amplifier, nor the superheterodyne receiver... But I did build this rig myself." I worried that OM Cebik might have been plunging us into this design debate way back in 1979.
But no need for worry. His definition of "design" is quite expansive:
Thanks again Walter.
Friday, October 17, 2025
"Keep Calm and Solder On"
Thursday, October 16, 2025
A Wonderful Homebrew Direct Conversion Receiver (and other HB projects) from Italy
Thursday, June 26, 2025
Hack-A-Day on the Tao of Bespoke Electronics
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
Wednesday, June 25, 2025
F6GUH: True Homebrew
Friday, June 6, 2025
A Tale of "Ten Minute Transmitters" and "Tuna Tin Twos": N2CQR Goes Back to CW QRP!
Inspired by K1OA and KA4KXX, I put the SolderSmoke DC receiver to work on the CW portion of 40 meters. At first I used a very (perhaps overly) simple "Ten Minute" transmitter. On June 4, 2025 I worked N2WJW in New Jersey. But the transmitter drifted as it got hot. So I switched to the more robust Tuna Tin 2 (TWO transistors!) and worked W2XS in NY and N9FGC in Indiana on June 5. With both transmitters I was "rock bound" -- crystal controlled. Power out was always less than 200 milliwatts. Antenna was a low to the ground dipole. The receiver was powered by our beloved 9V battery. The transmitter had a second 9V battery. Some observations: First, even if you CAN hear other signals, the different tones allow your brain to seperate them out (this has long been known to CW operators, but might not be readily apparent to newcomers). So even if the DC receiver is broad in frequency response and even though it IS also receiving the other side of zero beat, you can make CW contacts (unless, of course, another station is on a frequency that produces exactly the same tone as the one you are trying to work), even at very low power . Second, you don't always really have to be right on the other station's frequency. Here's why: If he is looking he can see you in his waterfall! So that SDR waterfall is now a friend to crystal-controlled HDR operators. Who would have thought? Above is a picture of the my station with the Ten Minute transmitter. See the notes I wrote on the QSO with N2WJW.
Thursday, May 15, 2025
WWII Homebrew In Norway
How My Grandfather Tuned Into London During WWII with a Radio He Built in Secret
My grandfather was a lifelong radio enthusiast and ham radio operator. In his early twenties during World War II, he lived in the remote mountain village of Hjerkinn, working at the railroad station high above the treeline when Germany invaded Norway.
He joined the resistance movement and built radios using parts from a downed Luftwaffe aircraft—mainly the radio tube, as seen in the photos I’ve attached. With it, he secretly tuned into broadcasts from London. It was a risky and courageous act, but it kept him and others informed when access to truthful news was critical.
Later, he introduced me to the world of radio. As a kid, I spent hours scanning ham bands, police channels, and even unencrypted cellphone calls. I was probably way too young to be listening to some of it, but in the pre-smartphone era, it felt innocent enough. That early exposure sparked a lifelong passion for electronics and radio—one that still defines me today.
A few weeks ago, I visited my mom and saw one of the wartime radios he built. I thought this group might appreciate it—not just as a relic, but as a story of ingenuity, resistance, and the enduring magic of radio.
Monday, May 5, 2025
I admit it. I am not 100% homebrew. I hang my head in shame.
Walter KA4KXX and Mike WN2A and I were recently talking about the degree to which we are 100% homebrew. Both these guys come a lot closer to this goal than I do. Here is my assessment of my gear:
I fall far from a state of 100% homebrew grace:
Thursday, April 24, 2025
The Copasteic Flow Blog -- German UHF Mobile CW Through a Geostationary Satellite, Agent Sonya's Homebrewing, More
It is always good to be reminded that someone out there is listening and reading, especially when it is nice folks like Hamilton and his family. These are the people who built the TouCans rig that was (is?) suspended above San Francisco at the center of a dipole antenna.
Following posts on the SolderSmoke blog, Hamilton has been monitoring the CW activites of a German ham who sends UHF CW signals through the sunroof of his car to the QO-100 satellite in geostationary orbit. See above. Very cool. Listen live to the satellite here:
https://eshail.batc.org.uk/nb/
Also cool is Hamilton's analysis of Agent Sonya's ability to homebrew a 1930s era CW station that could be used to communiate with Moscow Center. Hamilton believes she could do it. I have my doubts. But the discussion is a lot of fun.
Check our their blog:
https://copaseticflow.blogspot.com/
Thanks to Hamilton and his kids!
Saturday, April 19, 2025
Agent Sonya -- Did Soviet Spies Really Homebrew Their Rigs?
Wednesday, April 16, 2025
Homebrew vs. Kits -- The influence of Russian Homebrewers
Sunday, February 16, 2025
Why Should We Build Analog Gear When the World has Gone Digital?
Our friend Todd (Vasily) had recently been thinking about this on his excellent Popcorn Electronics blog:
https://qrp-popcorn.blogspot.com/
There are many answers to this question. Todd's post made me think about a message from Farhan VU2ESE on this same subject. See: https://www.vu2ese.com/index.php/2022/08/04/daylight-an-all-analog-radio/ My comment and a quote from Farhan appears below:
Hello Todd! I have been thinking about the same things. As you know there is a lot of magic in using gear that you have built yourself. And it is still possible to do this. But I think the builder has to make some choices: Building it yourself might -- as you say -- require you to move away from the perfection, bells and whistles of the modern ICOM 7300 style rigs while embracing the simple functioning of analog rigs. Farhan was thinking of this three years ago:
"So here we are, talking analog radios in 2022. Here is the memo : The analog never died. The world is analog all the way, until you descend into Quantum madness. The antennas are analog, Maxwell died a content, analog man. Our radios, ultimately, are analog machines and we are all analog beasts too. Amateur Radio technology has evolved into the digital domain. However, it has only made it easier for us to do analog with computers to simulate and print our circuits. So, it’s time to bid good bye to our Arduinos and Raspberry Pis and build an Analog Radio for ourselves. So let’s see what we can achieve in hindsight, a return to our native land and a rethink of our approaches. The radio is called Daylight Again, a nod to being back at the FDIM in 2022 after a gap of two years. It is named after the Crosby, Stills, Nash and Young’s song that had been humming all the time while put this radio together, emerging after 2 years of lockdown. This radio that took two days to come together, no actually two years! That’s: parts of it got built and stowed away, thoughts were struck in the shower, questions popped up during early morning cycle rides and notes and circuits were scribbled in the notebook. I must take the first of many diversion here: I hope you all maintain a notebook. Write down the date and whatever you thought or did on the bench and the result. Nothing is trivial enough to leave out. Wisdom comes to those who write notes. I started to build this on Saturday the 14th May and I checked into the local SSB net on Monday morning, the 16th May 2022. Back to the radio. What can an analog radio do that will appeal to us homebrewers?"
More to follow. 73 Bill Hi7/N2CQR
Wednesday, January 15, 2025
Ugly and Manhattan Construction from Popcorn Electronics
Some people apparently dislike these techniques. To each his own, but I like the Manhattan method. In fact, in the SolderSmoke Direct Conversion project, we are recommending the use of Manhattan circuit board tecniques. With Manhattan, you get a lot flexibility. At one point, for example, the High School students told us that they had forgotten to put a needed pad on the board. No problem! Just glue in a new one. Or if you put in one too many, just take one off.
You also keep all the circuitry and all the connections on one side of the board. This facilitates repair or modification. This kind of thing is not so easy when you have components on one side of the board and the connections on the other side. You spend a lot of time flipping boards over, breaking wires, trying to remember what goes where. Also, because the pads push the connections a couple of millimeters above the ground plane, I find that Manhattan technique actually reduces the chances for an accidental short to ground.
There has been some discussion of where the term "Manhattan style" comes from. Having been born on Manhattan island, I too wonder about the origin of the term. Some see it as the result of the grid pattern (like Manhatten's street grid) that results from the rectangular or square pads that are often used. Others point to the vertical parts placement that we see when looking at a board from the side -- the parts look like the skyline of Manhattan. Either explanation, I think, works.
Here is a Manhattan-style board I recently built in the Dominican Republic for my homebrew 15-10 meter SSB transceiver. I couldn't find any Gorilla glue here, so I went with Loctite Coqui. Same stuff. Latin American super glue!
Monday, January 13, 2025
SolderSmoke Direct Conversion Challenge -- Video #1
This is the first in a series of videos and postings on the SolderSmoke Direct Conversion Receiver challenge. Dean, KK4DAS takes us through an overview of the project. He covers the architecture of the receiver, construction techniques, component sourcing and selection and generally sets the stage for the build. Future videos will cover each board in detail.
We are very excited invite you to join the SolderSmoke Discord server. This is an experiment to see if Discord is a good forum for SolderSmoke listeners to interact with us and each other on topics of interest. For now, we will be used Discord exclusively for discussion of the DCR challenge. To join the SolderSmoke Discord server click on the link below.
Links and references:
• Join the discussion - SolderSmoke Discord Server
• https://discord.gg/Fu6B7yGxx2
• Documentation on Hackaday
• High Schoolers Build a Radio Receiver | Hackaday.io
• SolderSmoke YouTube channel
• SolderSmoke -- Homebrew Ham Radio - YouTube
• SolderSmoke blog
• https://soldersmoke.blogspot.
Sunday, January 12, 2025
Some History of Homebrew Ham Radio -- From Wikipedia and from K0IYE
From Wikipedia: https://en.wikipedia.org/wiki/Amateur_radio_homebrew
In the early years of amateur radio, long before factory-built gear was easily available, hams built their own transmitting and receiving equipment, known as homebrewing.[2] In the 1930s, 40s, and 50s, hams handcrafted reasonable-quality vacuum tube-based transmitters and receivers which were often housed in their basements, and it was common for a well-built "homebrew rig" to cover all the high frequency bands (1.8 to 30 MHz). After WWII ended, surplus material (transmitters/receivers, etc.), was readily available, providing previously unavailable material at costs low enough for amateur experimental use.[3]
Homebrewing was often encouraged by amateur radio publications. In 1950, CQ Amateur Radio Magazine announced a ‘‘$1000 Cash Prize ‘Home Brew’ Contest’’ and called independently-built equipment ‘‘the type of gear which has helped to make amateur radio our greatest reservoir of technical proficiency.’’ The magazine tried to steer hams back into building by sponsoring such competitions and by publishing more construction plans, saying that homebrewing imparted a powerful technical mastery to hams. In 1958, a CQ editorial opined that if ham radio lost status as a technical activity, it might also lose the privilege of operating on the public airwaves, saying, ‘‘As our ranks of home constructors thin we also fall to a lower technical level as a group’’.[4]
In the 1950s and 60s, some hams turned to constructing their stations from kits sold by Heathkit, Eico, EF Johnson, Allied Radio's Knight-Kit, World Radio Laboratories and other suppliers.[5]
From "From Crystal Sets to Sideband" by Frank Harris K0IYE https://www.qsl.net/k0iye/
Dear Radio Amateur,
I began writing this book when I realized that my homebuilt station seemed to be almost unique on the air. For me, the education and fun of building radios is one of the best parts of ham radio. It appeared to me that homebrewing was rapidly disappearing, so I wrote articles about it for my local radio club newsletter. My ham friends liked the articles, but they rarely built anything. I realized that most modern hams lack the basic skills and knowledge to build radios usable on the air today. My articles were too brief to help them, but perhaps a detailed guide might help revive homebuilding. I have tried to write the book that I wish had been available when I was a novice operator back in 1957. I knew that rejuvenating homebuilding was probably unrealistic, but I enjoy writing. This project has been satisfying and extremely educational for me. I hope you'll find the book useful...
...My personal definition of “homebuilding” is that I build my own equipment starting from simple components that (I hope) I understand. I try not to buy equipment or subassemblies specifically designed for amateur radio. I am proud to be the bane of most of the advertisers in ham radio magazines. I still buy individual electrical components, of course. I just pretend that the electronics industry never got around to inventing radio communications.
An irony of our hobby is that, when the few remaining homebrewers retire from their day jobs, they often build and sell ham radio equipment. These industrious guys manufacture and sell every imaginable ham gizmo. I doubt any of them have noticed that, by making everything readily available, they have discouraged homebuilding.









.jpg)