When you see Lahti printed on the dial of an older radio, it is typically marking a Longwave (LW) broadcast frequency rather than a shortwave frequency.
The presence of Lahti on the dial relates to several historical factors:
The Lahti High-Power Station:Located in Lahti, Finland, the national broadcaster Yle operated a massive, high-power longwave transmission station on "Radio Hill" (Radiomäki) starting in the late 1920s.Because of its central location and immense power (reaching up to 200 kW in later years), its signal could blanket all of Finland and carry across northern Europe.
Dial Navigation: On older European and world-band radio dials, manufacturers frequently printed the names of major high-power European broadcasting cities (such as Lahti, Rome, Berlin, Moscow, or Droitwich) directly onto the glass or metal scale. Because consumers tuned radios by city or wavelength rather than just abstract kilohertz numbers, these city names served as benchmark reference points for specific frequencies (such as Lahti's long-standing assignment on the longwave band, which eventually settled on 252 kHz).
The Era of "All-Wave" and Multi-Band Radios: Older vintage receivers—particularly those manufactured in Europe or targeted at international markets—often featured multiple bands spanning Longwave, Medium Wave (AM), and Shortwave. Even if a radio is broadly referred to as a "shortwave" or multi-band radio, its dial layout almost always incorporated the Longwave band where powerhouse European utility and broadcasting stations like Lahti lived prior to the widespread decommissioning of European LW transmitters in the late 20th century.
Crikey! Blimey! The parts are wonky! Then he fixes it and they are all lovely! These are some great descriptive words that you just won't hear in a U.S. workshop. Pity.
I liked the receiver. I had never seen one of these.
The Ultrasonic cleaner was nice. As was the oven.
His repair of the switches was very cool. I like his technique for repairing the many leads that got broken.
When he started unplugging the plugs on the boards, I got nervous. Pull out the cell phone and take some pictures first!
Opening up those old pots was really going the extra mile. I would have just squirted some deoxit in them.
He ended up changing almost all the caps on the AF amplifier board. The Capacitor Police would indeed been annoyed.
Great job. It was fun watching him work. But what would you guys have done differently? Please comment below.
Here we continue our series on workshops. This one is in English, so most readers will not need any closed captions nor translation.
There are a lot of good ideas in this video. I found myself thinking about my shack in Virginia and the one in the Dominican Republic. My parts strorage is very outdated. Here in Virginia I make use of old cardboard shoe boxes, and plastic "baby wipe" boxes (they are really old). I may need a 3D printer.
First, you probably need to turn on closed captioning, and select autotranslate, probably to English. This video is worth it.
This fellow takes on the self-imposed challenge of homebrewing a 2 meter FM receiver. He builds it on a copper clad board, using what looks like dead-bug construction techniques.
He is not a radio amateur. But he should be one, just by virtue if his work on this receiver.
The board looks a lot like one of our projects. He even points out the large number of parts that have been removed from the board. You get the sense that he shares in our common frustration with circuits that for some unknown reason just won't work. I found myself worried that he might opt to remove ALL the parts from the board -- that is our homebrew nightmare.
Fortunately, he does not reach this extreme. He gets the thing to work. It is still not perfect. He will go back to it later. Good idea. Take break. Walk the dog or something. Insight will come.
It is really great and refreshing to have this kind of "warts and all" "blow by blow" description of a build projects. Too often the books present projects as if they worked the first time the builder put them together. This happens very infrequently -- the process described in this video is closer to the norm.
And it is great to have this project come to us from Germany. SolderSmoke is dedicated to INTERNATIONAL homebrew radio.
First, it is a good day when I find a new Chappy Happy project on YouTube. Thank you Chappy Happy! You make us happy!
Second, even before I watched the full video, I could recognize the PAL VFO. This is an old CB device. You will find them at hamfests. I picked one up several years ago, knowing that I will someday use it as a VFO or for VFO parts. It is, after all, an LC VFO, and it is to be celebrated and used.
Chappy Happy turns his PAL VFO into a simple direct conversion receiver for the 25 meter SW broadcast band. He is on the west coast of North America and uses it to listen to Radio Japan. He uses a J310 RF amp and an NE602 Gilbert Cell mixer.
That is great, but there is a big problem in using a direct conversion receiver to inhale AM signals: Unless you can get the frequency AND the phase of the VFO to be exactly the same as the carrier, you will have distortion. You will not have this problem if the signal is SSB, but you will have it with AM or DSB.
I think I can hear the distortion on the Radio Japan signal. Can you hear the flutter? That is what happens with an AM signal being received on a DC receiver. This is why Doug DeMaw frequently warned that you could not listen to a DSB signal on a DC receiver without significant distortion.
What do you guys think? Can you hear the distortion? Should Chappy Happy turn this receiver into a simple superhet, perhaps something like the Q-31?
Here is a video of my Q-31 super het for the 31 meter SW band:
Again, thanks Chappy Happy! Please keep those projects coming!
Wow, this is very cool. I don't have a 5 inch naval gun mount. And NASA has never called me for any reason. This is all almost too much. Watching it all, I feel an urge to go UHF.
This interview was a lot of fun. I too was smitten at an early age by the HW-101. I still have one on my operating table. We are all lucky that Will is working in an innovative way on these old rigs. Who can forget his shocking water and soap (followed by South Texas sunshine) approach to cleaning these often cruddy old rigs? Thanks Will and thanks Eric for doing this interview.
I admit to being biased in favor of any project from Norway. This is the result of the fantastic videos of Helge LA6NCA. But even without the influence of Helge, this workshop/workbench project would stand out. It is really good. It is filled with good ideas. I like the way he makes use of 3D printed parts. The lighting scheme is excellent. I like the chair he got. There is a lot of humor in this video.
But you may have done things a bit differently -- please comment on what you would have done.
Thanks to Frengen Engineering. Here is the YouTube channel:
My posting of this video should clearly demonstrate the I am not a Ludite (one d), and that I am not opposed to technological change. I mean, look, Will has a Pick-and-Place machine. He has 3D printers. He has microscopes. I will likely never have these things in my shacks. But he has them, and uses them, and does a great job of explaining them.
I was also attracted to the video by the 12'x8' size of this shop. This rougly matches the sizes of both my Virginia and my Dominican Republic shacks.
I really liked the way Will built this shack. Many good ideas are in there. I especially liked his choice of flooring, and his ceiling mounting of video camera and microphone.
Like I said, lots of good ideas here. What did you find useful in the video? Please comment below.
A good friend, who was thinking very positively, sent me this video. I looked at it, and concluded that while this fellow seems to believe that he created this device, he really didn't. I realize that there are different views on this.
What do you think? Please put your comments below.
This popped up on Hack-A-Day yesterday and we were talking about it at the Vienna Wireless Society lunch.
Even if you find the topic to be, well, a bit off-topic, the presentation is entertaining and, I think, interesting. I have covered Wilson Cloud Chambers. And I have some experience (!) with Alpha particles.
Try not to eat it. And don't eat too many bananas!
Hidehiko reports that in Japan, this is called a "Self Quenching Circuit" and that it is popular with beginners. He notes that the quenching frequency is set by the values of the 5 Meg Resistor, the 50pF cap, the 33 uH inductor and and the 5.6k resistor. Its strength is adjusted by 10k variable resistor.
Note the two DC-DC convertors
A closer look at the coils.
We had some interesting back and forth with AI Gemini on this circuit. I wondered if a circuit this simple could in fact be SUPER regenerative. Might it be just a plain old regenerative receiver? AI Gemini looked at the schematic and confirmed my suspicion. TWICE!! This is a reminder that the AI can often be wrong. Emphatically wrong!
I asked earlier if this circuit could be a super regenerative circuit. You emphatically said that it could not be super-regenerative. But please reconsider. Look at that 33uH component. Could this be part of a self-quenching super-regenerative receiver?You are completely correct to push back on my previous
assessment, and I appreciate you prompting me to take a closer look. I was
wrong to emphatically dismiss it.
Looking at the provided "Circuit Diagram.jpg",
this circuit absolutely has the classic hallmarks of a self-quenching
super-regenerative receiver, particularly one designed for the VHF band.
Here is a breakdown of why this is the case and how the
specific components you mentioned factor into it:
The 33µH Component (TV Peaking Coil)
The 33µH coil acts as a Radio Frequency Choke (RFC).
Given the tiny values in the tuned circuit (a 0.24µH tank coil and 28pF tuning
capacitors), this receiver is clearly designed for VHF frequencies (likely the
FM broadcast or aviation bands, around 100 MHz).
At those high frequencies, a 33µH inductor presents a very
high impedance. Its job is to block the VHF RF energy from leaking down into
the audio output (AF OUT) and the power supply, forcing the RF to stay in the
detector circuit. Meanwhile, it easily allows the much lower frequency audio
signals—and the supersonic quench frequency—to pass through.
The "Smoking Gun": The Grid Leak Network
While the 33µH choke is necessary, the real proof that this
is a self-quenching super-regenerative circuit lies at the grid of the 6AK5
tube (pin 1):
The
5MΩ Resistor and 50pF Capacitor: This parallel RC network is the heart
of the self-quenching action.
In a
standard regenerative receiver, you want smooth, continuous oscillation,
so you use a much lower grid resistor (often under 1MΩ).
A 5MΩ
resistor is massive. When the tube begins to oscillate, it draws grid
current, which rapidly charges the 50pF capacitor with a negative voltage.
Because the 5MΩ resistor is so large, this negative charge cannot bleed
off quickly enough.
The
grid becomes so negatively biased that it completely cuts off the tube,
stopping the oscillation (the "quench"). The capacitor then
slowly discharges through the 5MΩ resistor until the tube can conduct
again, and the violent oscillation cycle restarts.
The "Regen ADJ" Control
You might have noticed the Regen ADJ 10k potentiometer at
the bottom. While standard regenerative receivers use these to carefully ride
the edge of oscillation, self-quenching super-regenerative receivers also use
them. In this circuit, adjusting the plate/screen voltage controls the aggressiveness
of the oscillation and fine-tunes the quench frequency for the best sensitivity
and audio recovery.
You made an excellent observation. The combination of the
VHF tank circuit, the RF choke isolating the audio line, and specifically that
ultra-high-value grid leak resistor confirms that this is indeed a
self-quenching super-regenerative detector.
Edwin Armstrong presenting the superregenerative receiver at the June 28, 1922 meeting of the Radio Club of America in Havemeyer Hall, Columbia University, New York. His prototype 3-tube receiver was as sensitive as conventional receivers with 9 tubes.
The operation of the superregenerative receiver is complex and difficult to analyze in detail. As noted by Thomas H. Lee, it "has never been understood by more than a handful of people at a given time."[22]
When operating on the 2-meter band, switching from a standard regenerative detector to a super-regenerative detector yields a massive jump in single-stage receiver gain—typically an additional 40 to 60 dB -- a voltage amplification factor of 100 to 1,000 times greater.
While a well-optimized standard regenerative receiver can manage roughly 40-60 db of RF/IF gain before spilling into continuous oscillation, a super-regenerative detector can easily achieve 100 to 120 dB of gain in a single isolated tube or transistor stage.
Here is why that delta is so profound, especially at VHF:
The Mechanics of the Gain Boost
Regeneration (The Knife Edge): A standard regenerative receiver relies on positive feedback adjusted to sit just below the point of self-oscillation. As you approach this threshold, gain and selectivity approach infinity in theory, but in practice, component drift, temperature, and antenna loading limit how close you can get. At 144 MHz staying on this knife-edge is notoriously difficult.
Super-Regeneration (The Exponential Ramp): A super-regenerative circuit deliberately crosses the threshold into self-oscillation. However, an ultrasonic quench frequency (typically 20 kHz to 100 kHz for a 2-meter receiver) periodically interrupts or "quenches" this oscillation before it can saturate. Because the oscillation builds up exponentially from the initial state of the tank circuit—which is driven by the incoming AM signal—the circuit acts as an incredibly high-gain sampler.
Practical Implications on 2 Meters
Sensitivity: Because of that extra 40 to 60 dB of gain, a super-regen can easily pull a microvolt-level AM signal out of the noise floor, whereas a standard regen at VHF would require an external RF amplifier stage to match that sensitivity.
Bandwidth and Fidelity: The trade-off for this massive gain is selectivity. Standard regeneration narrows the tank circuit's bandwidth significantly, which can make tuning touchy but keeps the receiver selective. Super-regeneration broadens the bandwidth due to the sidebands created by the quench frequency. For vintage 2-meter AM work (where signals might drift slightly), this broader bandwidth is actually a practical advantage, though it makes the receiver prone to interception by strong out-of-band signals.
The "Super-Regen Hiss": When no signal is present, the exponential buildup starts from thermal noise, producing a loud, characteristic rushing hiss in the audio output. When an AM carrier appears, it captures the buildup early, silencing the hiss—a stark contrast to the quiet background of a standard regen waiting for a signal.
HOW DOES SUPER-REGENERATION REALLY WORK?
To understand how a super-regenerative receiver achieves such massive gain on 2-meter AM, it helps to look at it not as a steady-state amplifier, but as a high-speed sampling engine that operates in cycles.
At the core of the circuit is a standard RF oscillator tuned to the 2-meter band Left alone, this oscillator would simply produce a continuous RF carrier. The "super" part comes from introducing a second, lower-frequency signal called the quench frequency (typically between 20 kHz and100 kHz).
Here is the step-by-step breakdown of exactly what happens during a single quench cycle:
1. The Quench Cycle (The Reset)
The quench oscillator constantly varies the bias of the 2-meter detector stage, swinging it back and forth between two states: sub-critical (where it cannot oscillate) and super-critical (where it desperately wants to oscillate).
At the start of a cycle, the quench voltage drives the detector into the sub-critical state. Any previous oscillations are completely wiped out. The circuit is wiped clean and made ready to sample the antenna.
2. The Exponential Buildup
As the quench voltage swings, the detector enters the super-critical state. RF energy begins to build up in the 144 MHz tank circuit. Because it is in a state of extreme positive feedback, this RF energy doesn't grow linearly; it grows exponentially.
However, an oscillator cannot start growing from absolute zero. It needs a "seed" to kick off the oscillation. This seed is a combination of two things:
General thermal noise in the circuit.
The incoming 2-meter AM radio signal from the antenna.
3. Sampling the AM Signal
If a weak AM signal is present on the antenna, its voltage combines with the background noise. Because the incoming signal represents a higher starting voltage than mere noise, the exponential buildup gets a "head start."
If the AM carrier is at a peak (high amplitude), the oscillation builds up very rapidly and hits its maximum saturation point early in the cycle.
If the AM carrier is at a trough (low amplitude), the oscillation starts from a lower baseline and takes longer to reach maximum saturation.
4. Direct Current (DC) Extraction
Because the RF oscillations reach saturation faster or slower depending on the strength of the incoming signal, the total energy or average current consumed by the detector tube or transistor during that cycle changes.
Strong AM Signal: The circuit spends more of the cycle in full oscillation -- higher average current.
Weak AM Signal: The circuit spends less time in full oscillation -- lower average current.
By passing this rapidly fluctuating current through a low-pass filter (which strips away the 144 MHz RF and the 20--100 kHz quench frequency), you are left with a varying DC voltage that perfectly mirrors the original audio modulation of the 2-meter AM signal. This is routed directly to an audio amplifier and your speaker.
Why It Sounds the Way It Does
This sampling process happens tens of thousands of times per second—well above the range of human hearing.
When no signal is present, the oscillator starts from completely random thermal noise every single cycle. Because thermal noise is completely chaotic, the time it takes to reach saturation varies randomly from cycle to cycle. This randomness is heard in the speaker as that loud, characteristic rushing hiss (white noise).
The moment a steady 2-meter AM carrier appears, it overrides the random noise. The oscillator now has a consistent, predictable seed to start from every cycle. The randomness vanishes, the circuit "snaps" into lock, and the loud hiss suddenly drops into dead silence, leaving only the audio modulation.
IF IT IS SO MUCH BETTER, WHEY DON'T WE USE SUPER-REGENERATION ON HF?
The short answer is that the strengths of super-regeneration (massive gain in a single stage, broad tuning) perfectly match the challenges of VHF, while its weaknesses (poor selectivity, high noise, and RF interference) make it highly impractical for the crowded, naturally noisy HF bands.
At High Frequency, a standard regenerative or superheterodyne receiver is vastly superior. At Very High Frequency, the physics change, making the super-regen a legendary "bang-for-your-buck" circuit.
Here is a breakdown of why this divide exists:
1. The Selectivity Problem (Bandwidth)
A super-regenerative detector works by constantly quenching and restarting an oscillator. This rapid switching acts like amplitude modulation on the circuit itself, which fundamentally broadens the receiver's bandwidth.
At VHF (e.g., 2 Meters): Signals are widely spaced, and vintage AM signals were prone to drifting. A super-regen's wide bandwidth (often 100 to 200 kHz wide) is actually an asset here because it makes tuning easy and accommodates drifting transmitters.
At HF (e.g., 40 Meters):The HF bands are packed tight, with signals spaced just 3 to 5 kHz apart. If you used a super-regen on HF, its broad bandwidth would swallow dozens of signals simultaneously, turning the audio into an unreadable soup of overlapping stations. HF demands the razor-sharp selectivity that only a standard regen or a superhet can provide.
2. The External Noise Floor vs. Circuit Gain
The primary reason you need a high-gain receiver changes depending on where you are in the spectrum.
At HF: The limiting factor for hearing weak signals isn't your receiver's internal gain—it is external atmospheric and man-made noise (static, lightning, power lines). Because the HF background noise floor is naturally high, you don't need a massive amount of single-stage amplification. A standard regenerative receiver has more than enough gain to amplify a signal up out of the HF noise floor.
At VHF: Cosmic and atmospheric noise drop off sharply at VHF. The limiting factor becomes the internal thermal noise of the receiver's components. To hear a weak microvolt-level signal, you need massive, ultra-low-noise amplification. The super-regen provides that staggering 100 dB of single-stage gain, making it incredibly sensitive to weak VHF signals that a standard HF-style regen would completely miss.
3. The Quench Frequency Ratio
For a super-regenerative detector to work properly, the quench frequency must be significantly lower than the operating RF frequency, but significantly higher than the highest audio frequency3 kHz for voice).
Ideally, you want the RF frequency to be at least 100 to 1,000 times higher than the quench frequency so that the RF oscillator has time to complete many hundreds of cycles during a single quench wave's exponential buildup.
At VHF: A quench frequency of 50 kHz fits perfectly. It is well above human hearing (inaudible in your headphones), yet the 144 MHz signal has plenty of room to cycle thousands of times within that 50 kHz window.
At lower HF (3.5 MHz): If you try to maintain that same ratio, your quench frequency drops right into the audio spectrum (e.g., 5 to10 kHz). You would hear a deafening, continuous high-pitched squeal in your headphones alongside the radio signal. If you try to raise the quench frequency out of the audio range, the RF signal doesn't have enough time to cycle and build up exponentially before being quenched, ruining the circuit's gain mechanism.
4. Severe RF Radiation (The "Mini-Transmitter")
Because a super-regen is literally a high-power oscillator being driven into heavy saturation tens of thousands of times per second, it acts as a small spark-gap transmitter. It blasts a wide, noisy hash of interference right back out of the antenna.
At VHF: While still an issue (which is why classic 2-meter super-regens often used an isolated RF pre-amplifier stage like a 6AK5 tube to block backward radiation), the signals don't travel past the line of sight.
At HF: If you hooked a super-regen directly to a long-wire HF antenna, the ionosphere could propagate your detector's severe interference for hundreds of miles, wiping out local amateur radio or shortwave reception for your neighbors.
Look at that! The VFO from the venerable (1970s!) Yaesu FT-101 lives on, not only in Northern Virginia, but also in its country of origin, Japan!
Hidehiko JA9MAT sent me the attached video of one of his homebrew receivers. He described it this way: 12BE6(DET) + 6AW8A (Franklin VFO) based with L/C VFO Box from old rig.
In the video we see more a more detailed description:
Hidehikosan explained about the FT-101 VFO box:
My question: The VFO looks like it originally came from an FT-101. What did you do with that? Did you add a Franklin oscillator circuit and simply use the capacitor in the FT-101 box?
Hidehiko's answer: Yes, I made a Franklin circuit in the small candy box and use the FT-101's VFO as an L/C box.
-------------------------------
There is a lot of homebrew goodness in this video: the wood base (Frank Jones would approve). The Altoid tins (GQRP would love this). Thermatrons (that one's for Grayson). And the aforementioned FT-101 VFO box (we are not alone!).
Thanks again Hidehiko. More homebrew goodeness from him in the days ahead.
It has been a long time since we saw anything like the X-ray machine described in CL Stong's classic book "The Amateur Scientist." Here are some other SolderSmoke blog posts about this (and related) stuff: https://soldersmoke.blogspot.com/search?q=X-Ray
This device is built around an old DY-86 tube from an old black and white TV. Mikel describes a very simple test to determine if these tubes have leaked, or if they still have good vacuum.
Mikel uses a really scary high voltage power supply.
I like the FN-RISI radiation detector. Want one!
Note that Mikel used a remote turn-on when using this machine. I hope there are no people in the apartment next door! He does use a lead shield, but only on three of the four sides.
The use of dental X-Ray film was really cool. The development of this film in Mikel's lab reminded me of my developing of 35 mm film in a dark room I had set up in our downstairs bathroom. I couldn't afford an enlarger.
Mikel warns that you should not try this at home! Good advice!
Thanks to Mikel, and to Hack-A-Day for alerting us to this project.
We recently complained that no SolderSmoke Direct Conversion receivers have been built in Japan. So far, no Japanese SS DC Receivers have been built, but Hidehiko JA9MAT has gone a long way in addressing this complaint. In the video above you will see a 40 meter receiver using a PTO and a LONG tuning shaft. There is a wooden base. I see at least three 3D printed coil forms. Hidehiko explains that this receiver has "SA612(DET) + 2N3904 x 2 (Franklin VFO) based with Long Shaft PTO." FB Hidehiko! More from him in the days ahead.
I thought this was an interesting look at filters and crystals. And even mechanical filters. Remember: Those little SAW containers became the lapel pin symbols of the FMLA.
I know there are readers who object to anything produced using AI. This video is in that category. But those who object would presumably have accepted the videos or other content found through the use of a search engine, right? Perhaps those who object to this kind of material should just turn off their computers, wait for the next delivery of QST or 73 Magazine (!) and hope that no AI tools were used in their production. Also, I would point our that reading this blog is entirely optional.
Congratualtions to Andri, of Bandung, West Java, Indonesia. Andri successfully built the SolderSmoke Direct Conversion receiver. (See the the Short below for a video of his receiver in operation.) Like many, he had some trouble getting the AF transformer -- so he took one out of an old Japanese transistor radio. He needed the FET for the PTO, so he made due with a surface mount part. All this by someone who does not have a ham license. I think he deserves a license, solely based on his successful build of this receiver. He has done something that most hams will never do: He has homebrewed a receiver. Thanks Andri!
-----------------------------------------------
Comments from Andri:
I am just a newbie and not a ham radio operator, so I don't have a callsign. I do enjoy building electronic things though even though I have no background in electrical engineering.
It was a nice rewarding experience building this receiver. The challenging part was sourcing some parts which are hard to come by here in Indonesia such as the toroid cores, JFET and audio transformer. So I substituted FT50-6 with FT50-2, T50-43 with ferrite core for SMPS, and I use an SMD JFET instead.
Thank you very much for the detailed instructions on how to build this radio. Without them I would be lost. Ham radio has always been intriguing to me, but I never got into it because it is a prohibitive hobby.
RX built in Bandung Indonesia -- Andri used an AF transtormer from an old Japanese receiver.
Why have NO receivers been built in Japan? And none in China. Only one in all of Latin America. Not one in all of Africa.
Please let us know if you spot any errors, or if we have inadvertently missed anyone. Don't worry about being late to the game -- the challenge continues. All of the info is still available.
As of August 17, 2026 0845Z:
So far, total receivers built: 138 (130 plus 8 honorable mentions). Total Count: 138. Receivers built in 19 countries.
NE3U (KY4EOD) Matt
KQ4AOP First ham signals ever heard!
N9TD Derek
AC3NG Ryan
VK3TPM Peter Marks
W4KAC Ken
W4KAC Ken built a second one!
N2EPE Erik
VA3NCA Wayde (Canada)
KI5SRY Mark -- Gears on PTO screw
KA1MUQ Frying pan receiver
AA1N Adam
ZL1AUN Aaron -- Using SSB transmitter -- (New Zealand)
W8UC Never before homebrewed.
VK4PG Phil -- Nice case, "really pleased"
G7LQX Working well, video of CW and SSB. -- (England)
KE2AMP John Spring on PTO screw -- great
N9SZ Steve nice receiver
KD9NHZ Piotr Nice one
KE8ICE Calvin, Very cool receiver.
WV3V Jayson! Got it done!
GM5JDG Martin. -- (Scotland)
KF8BOG Jim: A long struggle, but success.
Chris WalesFantastic video. -- (Wales)
YD9BAX Wayan! Homebrew transformer! (Indonesia)
N0NQD Jeff
WN3F Roy -- Made new stickers!
AB5XQ Bill
KB7ZUT Andy
AA1OF Jer
VictorKees Holland (Netherlands)
KC9OJV John -- Manhattan-style convert
WZ5M 1, 2 or maybe even 3 receivers!
K1KJW Jim in Vermont
KC5DI Dallas -- friend of WZ5M
Gary Australian -- Wooden PTO form (Australia)
LU2VJM Juan in Argentina -- (Argentina)
K1OA Scott "Most fun in 50 years"
KC9DLM Ben -- Had EFHW problems
PH2LB Lex Yellow, Glue Stick -- (Netherlands)
AI6WR David
G6GEV Dave (It was a blast!) (England)
KC1ONM Wayne MakerLabs NH
KB1OIQ Andy MakerLabs NH
KA1PQK Jay MakerLabs NH
W1TKO Mike MakerLabs NH
K5KHK Karl
SM0TPW Mikael -- (Sweden)
KI7LKB Brian (coat hanger tube)
M6CRD Chris (England)
W2DAB Dave in NYC
W4JYK Wes of VWS
KA4CDN Mike of VWS
M7EFO Adrian
VK5RC Rob (Australia)
KD8KHP Dave
VK1CHW Chris (Australia)
KA0PHJ Brian
W0IT Louis
W1PJE Phil
W2AEW Alan
KN6FVK John (Barkhausen-Be-Gone Spray)
VU2JXN Ramakrishnan -- (India)
AA0MS Doug
9V1/KM7ABZ Paul -- (Singapore)
VK2BLQ Stephen -- (Australia)
N3FJZ Rick
Daniel VE5DLD -- (Canada)
Student 1 Student of VE5DLD
Student 2 Student of VE5DLD
Student 3 Student of VE5DLD
K7WXW Bill
NK3H Mitch
KN4ZXG Ted
WA1MAC Paul
N4AVC Chuck
K3IY Kevin
N6ASD Ashish in Bangalore (India)
W1DSP Rick
WD4CFN Steve
KM5Z Mike
KF5DAN Dan
Fritz Fritz
N9OK Joe
WA5DSS Bill
K0GDB Grant
G0JNR Shane Glow-in-Dark Coil Form
KK7BCO Tobias
K2BVR Bob
Robert Sutton
K5YFO Dave (Texas)
KD4PBJ Chris
KN4GAH Chris -- EE perspective
F1GMA Philippe -- (France)
W2TEF Todd
EI9ITB Karl -- (Ireland)
VU2TUM Puneit Singh (India)
AA7EE Dave Richards
KI5VIR Jay
CT7AXD Graham -- Promoted from Honorable Mention! (Portugal)
