Category Archives: Reviews

Antennas, Field Reports, FT8, Guest Posts, News, Portable, POTA, QRP, Reviews

Field Report: N2YCH’s POTA Activation with a Magnetic Loop Antenna

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By Conrad Trautmann (N2YCH)

I tried using an Alpha Antenna 100w 10-40m mag-loop antenna for a POTA activation. I operated on FT8 so I could monitor where my signal was being received by using the PSKreporter.info real-time signal reports from stations that spotted my transmission. I really didn’t know what to expect or how a loop antenna would perform in the park compared to a vertical or wire antenna. Did it work? You bet. Would I recommend it? I’ll share my observations and results below and let you know at the end.

I bought this antenna used on QRZ.com’s swapmeet. It was clear to me upon receiving it that the prior owner had taken very good care of the antenna. I set it up on my patio for a quick test before heading to a park.

Mag Loop Test from the N2YCH QTH

It sets up quickly. The tuning is a little challenging to learn at first but there’s no doubt when you get it right, since the received signal is easy to peak once you find resonance. The tuning knob has three turns from 40m up to 10m. Moving it slowly from the bottom of the HF band up to the top, you’ll find the sweet spot and you can peak the received signal on your radio’s S-meter. I checked it with my RigExpert antenna analyzer and as you’d expect, the bandwidth was very narrow, but it was resonant and the SWR was 1.4:1.

The Alpha mag loop can do 100 watts SSB but only 5 watts on digital modes. I fired up my KX3, set it for 5 watts and called CQ. I made three quick contacts and was satisfied that the antenna was working. I checked the spots on pskreporter,info and found it interesting to see a narrow band of stations from Minnesota and Wisconsin down to Florida spotting me.

Pskreporter.info map of spots from Mag Loop

On to the park: Indian Well, US-1684 in Shelton, Connecticut

Knowing that the antenna was working, I brought it out to one of my favorite places to activate, Indian Well State Park (US-1684). Again, set up was fast and I was able to tune up on 20 meters pretty easily.

Alpha Magnetic Loop Antenna at Indian Well State Park in Connecticut

The antenna was receiving the FT8 signals at S-9 with the KX3’s pre-amp off and you can see below that I was decoding nearly 50 stations per FT8 cycle. If you look closely at the JTAlert screenshot below, you can see I was receiving stations from all over the US as well as Canada, South America and Europe. There’s no doubt the mag-loop can hear very well.

Forty-seven stations are being received and decoded. POTA stations in the bottom right pane

I called CQ and had a few responses right away. However, I was finding it challenging to get stations to reply. It took almost an hour for me to get my 10 contacts to activate the park, which is unusual. I should mention that the space weather was acceptable, sitting just below Kp3, so that wasn’t the reason.

Once again, I checked Pskreporter.info. Interestingly, it had the same pattern of spots that I saw when testing the antenna at home, a band from Minnesota to Georgia. Of the first 10 contacts I made, four were in North Carolina, two in Florida and the rest were coming from within that narrow band who could hear me.

Spots from US-1684 using the Mag Loop

I understand that a mag loop is directional, so I tried moving it 90 degrees to see if it made a difference. Not really. The spot map looked the same after the change in direction. I was able to receive a few more EU stations after I moved it. I did have to re-tune the antenna after I turned it, the SWR had gone through the roof.

For comparison, after struggling to make contacts on the loop, I decided to set up my “go-to” antenna of a 17’ telescoping whip on a 10’ mast with a counterpoise.

Buddipole with 17’ telescoping whip and elevated counterpoise

I unplugged the mag loop and plugged in the vertical using the same transceiver set at 5 watts. Take a look at the stations who could spot me on PSKreporter now…

PSKReporter Spots with vertical antenna on 20m QRP

Clearly, that same 5 watts from the KX3 had better coverage on the vertical than using the mag loop.

Here’s a screenshot of WSJT-X on the vertical (click image to enlarge):

WSJT-X and JTAlert reception using 17’ vertical with counterpoise

Once I switched to the vertical, I knocked out 10 more contacts in just 20 minutes.

So, after all that, what do I think?

The Mag Loop sets up quickly, uses very little space and finding resonance isn’t difficult to do. It receives very well, of course this is one of the true advantages of mag loops, is their inherent ability to receive well in noisy environments.

As an antenna to use for transmission? Well, I think this is where the challenge lies, for me anyway. It was certainly hearing stations way down in the noise from far away. However, as you can see by my real-time reception reports, it did not give me the wide transmission coverage that I’m used to with the vertical. Maybe this would be different on SSB with 100 watts, but it’s a difficult to measure SSB reception like you can with digital.

Can you activate a park with it?  Yes, indeed. Would it be my first choice for POTA? Probably not. If you were using this on SSB, the antenna itself (not the radio) would need to be re-tuned for every frequency change (if you were hunting), which is not convenient. If you are the activator, then you could tune up for the frequency you selected and it would be good to go.

My next test with this antenna is to try tuning it to a WSPR frequency and comparing spots it receives to my other antennas. I suspect this it where it will shine.

Stay tuned!

Guest Posts, New Products, News, QRP, QRP Radios, Reviews

First Look at the HF Signals zBitx QRP Transceiver

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When life gives you lemons, you make lemonade!

by Vince (VE6LK)

Dear readers, it’s been a hot minute since I’ve had time to activate POTA and write about it, and today I tried to activate a park, but a combination of equipment issues and nobody responding to my calls ended my activation. Anyways … when life gives you lemons you make lemonade, and accordingly the activation article is now a radio review article instead! <grin>

That radio is the HF Signals zBitx. An SDR radio, it was spoken about at 2024 Four Days In May and it opened up for orders on December 25 2024 – a Christmas present, if you will. Thomas and I both jumped on the ordering queue (two numbers apart, no less) as well as 248 others around the world. I thought to myself “an all-mode 80-10m QRP radio with a waterfall and weighing under 1 pound for under $200USD shipped? SIGN ME UP!” and pressed the order button. Honestly I thought about it for less than 45 seconds once I read the specs. I also thought to myself that it was an “experimenter’s radio” and not a fully finished product, meaning you can tweak it if you wish to dig into the bowels of the code on the built-in Raspberry Pi.

The 250 original orders were snapped up in two days and then the purchase button was turned off on the website. There were some shipping delays from the original date, as HF Signals discovered the Chinese New Year holiday of 3 weeks where, it seems, everything is shut down. I also discovered this with the Morse Tutor Kits my buddy and I sell, and we couldn’t ship product for a month as we could not get parts.

Showing the on-screen keyboard. It also shows the fit and finish of the shipped product. Photo credit: HF Signals

The radio arrived on March 31, about 4 weeks beyond the original estimate, and I was excited to open it up. I mean, who doesn’t like new radio day after all? I was so excited that I did an unboxing and first look video on YouTube and showed off a few quick things about the radio. TOP SECRET – it took me 5 takes to shoot, so it wasn’t quite a first look!

The radio promises much and delivers a lot. It transmits on 80 through 10 meters at around 5 watts driven by a pair of 18650 cells, or your 6 to 9V four amp power supply. It has two microprocessors, one is a Raspberry Pi Zero W and one is a Pi Pico to drive the display. It has integrated AM, SSB, CW, FT8, touch screen, built-in electret mic, built in CW keyer and keyboard, and weighing just 460g / 1 pound including the batteries. This radio seriously has lots to offer especially at the price point.

The author’s radio with a customized faceplate and VFO knob. The triangular slice in the waterfall display is a photographic artifact.

The source code, schematics and 3D print files are all available on a Github, and indeed I customized the front panel and replaced the knob with one that has a dimple on it, if only to spin the VFO more easily.

You must be made aware that I was really excited to get this radio. It has a history of many other Bitx radios before it. But I’m also aware that there’s the old axiom about “too good to be true” so I tempered my expectations. You must also be made aware that I really want this radio to work as its small form factor, low cost and integrated waterfall make it exciting an exciting prospect in my limited fleet of QRP rigs. And, for the record, I have nowhere near the QRP rig count that our gracious host has, nor are they individually named.

Besides all of that, it is the only HF radio I plan to pack for Hamvention 2025 so it’s gotta be right for that trip.

However, the zBitx may be best described as an early release and/or a work in progress. Continue reading First Look at the HF Signals zBitx QRP Transceiver →

Guest Posts, News, Pedestrian Mobile, Portable, POTA, QRP, QRP Radios, Reviews

Living the QRP Life: Glen’s Thoughts on Eight Months with the Elecraft KH1

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Many thanks to Glen (KC8LA) who shares the following guest post:

New QRPer and Eight Months with the Elecraft KH1

by Glen (KC8LA)

Let me introduce myself—I’m Glen, KC8LA. I’ve been a ham for 30 years, but I only started hunting POTA activators in mid-to-late 2023. Before long, I thought, “Wouldn’t it be fun to activate parks myself?”

Of course, YouTube was the place to learn how to get started. I saw that I’d need a portable radio (like the FT-891), a tuner, a power source, a multiband antenna, and a way to hoist it into a tree. Whew! It all sounded like a lot of lugging gear for just a couple of hours of radio fun. Was it worth it? Back to YouTube I went, searching for an easier way.

Over the years, I’d never thought much about QRP. Then, I stumbled across videos of Thomas, K4SWL, beta-testing a new self-contained Elecraft radio: the KH1. I watched every KH1 video I could find—so many that I joked Thomas became my “best friend” through the screen.

“This is it,” I thought. “I’ll get the KH1!” But when I checked the price, I had to pause and think. After a couple of weeks, I finally decided to order it on November 22, 2023, figuring it would arrive in early December, just in time to prepare for my first activation in January.

Nope. The wait time was three months, pushing the delivery date to February. I could wait, though! In the meantime, I set up my FT-891 in the Jeep using alligator clips to the battery, hamsticks, and a laptop table between the seats for my key and notepad. It worked, but I was just sitting in the Jeep. Come on, KH1!

Due to parts delays, the wait stretched to five months. While I waited, I practiced activating parks with the FT-891 and figured out the basics to be ready for the KH1’s arrival.

Finally, on April 18, 2024, the KH1 arrived. I was sitting on the porch when the mail carrier handed me the box. I opened it right then and there, assembled it, and made my first contact on 20 meters. My hands tremble a bit, so it was challenging, but I did it. Over time, I practiced and now comfortably run 18–20 WPM.

My first activation with the KH1 was on April 26, but it didn’t go as planned—only four contacts. Undeterred, I tried again the following weekend. Eight contacts. Still not a success. Thomas made it look so easy in his videos!

I began researching what I was doing wrong. I learned that a 5-watt activation takes longer than one at 100 watts (obvious in hindsight). Time of day, solar conditions, and operating on QRP-friendly frequencies all make a big difference. Once I adjusted my approach, my third activation was a success, and they’ve been going well ever since.

In the meantime, Hamvention rolled around, and since I live nearby, I put activations on hold. At Hamvention, I made a beeline to Wayne from Elecraft, shook his hand, and thanked him for dreaming up the KH1. We swapped some war stories—I even shared how I’d worked 3G0YA split on 15 meters from a park!

Anytime, Anywhere Radio Is So Much Fun!

Fall at Kiser Lake State Park (US-1966)

Since the KH1 arrived, I’ve completed 70 activations across 23 parks in three states, including seven parks in Utah over five days (a story for another time). Of those, 60 were with the KH1, with only four failures—two due to learning the radio and two from running out of time. I’ve logged around 1,000 activation contacts with the KH1 so far.

The KH1 goes everywhere with me, and I use it 95% of the time in its portable, self-contained configuration. Occasionally, I deploy my homemade “chalk line” EFHW antenna, which consists of 33 feet of 2mm throw line and 41 feet of 26-gauge wire. It’s compact, tunes well, and clips nicely to the KH1’s ES-20 case.

Pool mobile at Grand Lake Saint Marys State Park (US-1953)

I’ve done activations at a variety of locations: tire shops, birthday parties, weddings, bike paths, and even my living room chair. The KH1 makes HF portable operation so easy that I’m contemplating buying a second one as a backup.

Picnic table my home park, Sycamore State Park (US-1995)

The built-in key has been a mixed bag—I’m already on my second one, and I’ve had to use my backup key a few times. But the radio’s battery life has been excellent, easily lasting four two-hour activations before needing a charge. The tuner works flawlessly, and I’ve been pleasantly surprised by how well the built-in speaker performs in quiet environments.

Exploring the Outdoors

Davey Woods State Nature Preserve (US-9403)

What I love most about the KH1 is how it’s transformed my radio journey. It’s encouraged me to get outdoors, discover new places, and revisit sites I haven’t seen in decades. My home park, US-1995 Sycamore State Park, is just 20 minutes away, and I’ve activated it 27 times, logging 594 contacts toward my Kilo award.

Reading a field report on QRPer.com, I saw that Thomas had activated US-9410 while walking a 0.6-mile boardwalk with the KH1. That park is only an hour away, so I thought, “If he can do it, so can I!” And I did. It’s a cute little wooded park, perfect for a portable activation.

I’m still working, so I need to plan activations carefully for parks that are more than an hour away. But with the KH1, I’m always ready for an adventure.

Final Thoughts

North Country Trail National Scenic Trail (US-4239)

I would have never believed that a tiny radio with a 45-inch antenna could reliably make HF contacts, but the KH1 amazes me every time I pull it out. It’s my radio of choice for almost all CW contacts now—I’ve probably made fewer than 20 CW contacts on my FT DX10 and FT-891 since getting the KH1!

Yes, there are plenty of other portable radios out there, but for me, the KH1’s convenience, low “lug factor,” and quick setup time are unbeatable. I can be on the air in under a minute.

If you’re on the fence about trying QRP or the KH1, I say go for it. It’s a radio that has truly enhanced my life, and I can’t imagine my portable adventures without it.

Field Day, Field Reports, News, Portable, QRP Radios, Reviews

Field Day: It’s all about the audio…

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If you listened to the latest Ham Radio Workbench Podcast episode–our Field Day Debrief–you will have heard that my Field Day was a pretty low-key event.

Originally, I had hoped to fly out to Oregon and hang with my friend George (KJ6VU) and his radio club, but there were just too many family activities happening this year for me to travel for a week.

Instead, my wife, daughters, and I met up with my buddy Vlado (N3CZ) and his sister, who was visiting from North Macedonia.

We met at the Zebulon Vance Birthplace (US-6856) and, luckily, had the picnic shelter to ourselves. The weather was gorgeous, and we put together a proper potluck picnic.

Field Day POTA

Vlado and I decided to do some casual Field Day operating, and I brought the radio gear.

Since I’m currently testing the Xiegu X6200, I brought it along to see how it might handle the RF-dense environment of Field Day.

We made a few contacts with the X6200, but the audio and receiver struggled in that RF-congested environment. This isn’t a surprise, in truth. Most portable field radios aren’t designed to have contest-grade performance—they’re designed for portability and functionality in normal field conditions.

The other radio I brought along was the Penntek TR-45L. I can’t remember if I’ve used it during Field Day in the past, but all Vlado and I could say was…

Wow!

The TR-45L sounded phenomenal!

I’ve always believed that the TR-45L (both the original and skinny version) has some of the best audio in the world of field radio. That is a major plus when it comes to Field Day.

The thing is, it also has a stable front end—the TR-45L receiver handled those packed RF conditions with ease. In fact, we were both amazed at how easily we could hear all of those competing signals. There was absolutely no listening fatigue at all, and both of us could hear weak and strong signals all occupying the same space..

It sounded distinctly analog and “pure.”

Vlado and I both tend to operate with filters wide open—using the filter between our ears—so the audio produced had excellent fidelity.

Vlado and I also made short work of Vesna’s Feta cheese bread!

A couple of times, we did narrow the TR-45L’s audio filter when there was a strong competing station, but by and large, the audio was so clear, we really didn’t need to.

Top-Shelf

The takeaway for me is that the TR-45L series radios have proper contest-grade performance even if they lack contest-grade filtering.

I shouldn’t be surprised because even its predecessor, the TR-35, can handle crowded conditions with ease.

I should add here that the supply of new Penntek radios may already be dried up. As I mentioned in a previous announcement, John (WA3RNC), is retiring and selling off all of his existing radio inventory.

According to his website, he might still have some TR-45L Skinny models, but that’s it. In fact, that notice was dated May 28, 2024, so I’m not sure if it’s still correct.

The TR-45L Skinny

I love the Skinny as much as the original TR-45L—they sport the same receiver and audio; the Skinny simply lacks the ability to add an internal battery and Z-Match ATU. What you get, though, is a radio that’s even more portable and provides an excellent operating angle with the bail folded out.

Have you ever operated a Penntek radio during a contest or Field Day? What are your other favorite field radios for this type of environment? Please comment!

Accessories, Guest Posts, News, QRP, QRP Radios, Reviews

NI1Q’s Long-Awaited Elecraft KH1: Worth the Wait?

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After 126 Days, A Long-Awaited Unboxing: The KH1 Arrives!

by Emily (NI1Q)

If there was one thing being in a physical rehab facility for 4 months taught me it was friends and families were a comfort.  They brought encouragement, broke the boredom and were helpful in bringing hope when I wasn’t sure if I would be walking again. I was able to have my DMR handheld and checked into nets and talked with friends, but I really missed being on HF.

Although I own an IC-705 and a QRP Labs QMX, managing them in a room would have been difficult.  I really love the 705, and can manage the QMX, but the 705 is not the kind of rig you can put in a bedside table drawer;  the QMX with an EFHW + batteries becomes about as large and difficult to deploy.  Especially in bed.

It was with this mindset that I watched in interest Tom’s initial videos of the Elecraft KH1.  I initially saw it as something akin to the QMX, and I had some reservations about the key.  As I watched several of Tom’s exploits, my mindset began to change.  On January 29, 2024, I placed an order for KH1 Edgewood package.  I would soon (I hoped) become an Elecraft owner, part of what sometimes seems to be a cult, and other times seem to be the most loyal fanbase in ham radio.

I initially calculated I would get delivery sometime in April, just in time for my birthday.  As that time passed I talked to Elecraft and they opined that I would have it in time for Dayton.  A week before, it wasn’t going to happen, and I packed heavy to take the IC-705 with me.

And, then, May 30th, my wait was over. An email arrived: The KH1 was on the way!

Boxes Arrives:  I can’t contain myself…

On June 1st, I was out playing fetch with Zoe and saw the postal truck coming down the street, and I rushed over to the curb to meet him.  As he clicked his phone to certify delivery I asked “It’s from Watsonville CA, right?”  He smiled; “You must have been waiting for this one.”  “126 days for sure.”  I rushed into the house with my package quicker than Ralphie Parker running out into the snow with a Red Ryder BB-gun on Christmas day.

I had previously ordered the right angle antenna adapter, so together I had two boxes to unwrap.  The KH1 was packed well enough the box puffed up with what I assumed was bubble-wrap.

Carefully cutting the packing tape confirmed my assumption, and I was greeted by a very nice and unexpected colour manual that confirmed I had now become an Elecraft owner for the first time.

I thumbed through the manual and made a mental note of the sections I’d need for a quick “getting started” activity.  Time set – check.  Antenna selection – check.  Charging – check.  On-off switch – check.

I was ready (and eager) to go.

Pieces, Lots of Pieces.

Even though it looks like a tidy group of four things, there were multiple layers.  First out was the Edgewood case.  It’s a nice case but with only one extra pocket.  I would later learn it wasn’t really enough. The case was well padded, so for now it would be where the radio lived. Continue reading NI1Q’s Long-Awaited Elecraft KH1: Worth the Wait? →

Field Reports, New Products, News, Portable, POTA, QRP, QRP Radios, Reviews

Xiegu X6200 Trial by Flare: Answering your questions and sharing my field notes

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Update as of May 31, 2024: I’ve just learned that the prototype unit I used for this activation has been superseded by a production model Xiegu X6200. While many of my initial impressions remain valid, some of the bugs and quirks I noted have likely been addressed in the production model.

When I published this post, I was under the impression that this loaner unit was representative of the final production run. In light of this new information, I’ve removed the mention of some specific bugs until I have the opportunity to evaluate the production run unit.

I’ll be receiving a production model loaner in the coming weeks, and I’ll update this post and share a video demonstrating the updated radio. Stay tuned!

After publishing my post yesterday morning, I ran a few errands in town, then headed to Lake Powhatan in Pisgah National Forest to perform a POTA activation with the new Xiegu X6200.

In short, my buddy Vince summed it all up in a text he sent, stating that I sure picked an interesting time to get on the air. I received this image from Vince–while calling CQ POTA for the 100th time–showing the results of our X-Class Flare:

It was a radio blackout.

In the end, I did log eleven stations: 1 on 30 meters, and 10 on 20 meters, all with CW.

 

Eventually, I did plug in an external battery and run the X6200 at its full 8 watts of power in SSB mode, but there were no takers on 20 meters. The bands were so dead, I even received reports from some of you that the FT8 portions of the band had little to no activity.

That dead!

I did manage to hunt some other park activators successfully–we activators had to work together to get through this one!

Video: Change of plans

I had originally planned to create a video of the activation, write a detailed field report, and answer some of the questions you left in the comments section of my previous post. I was actually able to make a video, but it’s incredibly long. Because of that, I’m only going to upload it to Vimeo for QRPer.com Patreon supporters to view. I simply don’t want to deal with the inevitable drive-by comments on YouTube from people expecting quick-hit thoughts about the X6200 in a nearly two-hour video.

No worries, though, I will make another video witht he X6200 in the next few days and publish that one on YouTube.

In the meantime, I’ve also taken some thorough notes that I’ll be sharing here.

X6200: Initial Impressions and Notes

Disclaimer: It’s important to keep in mind that this is a prototype loaner unit, and the firmware is still in its early stages (Version 1.0). Because of this, the following observations and notes should be taken with a grain of salt.

Many issues will likely be addressed in firmware updates that Xiegu will be releasing in the coming days and weeks.

The date of publication for this article is May 30, 2024. Considering

I will eventually be posting a comprehensive review of the X6200, but only after I’ve spent a significant amount of time (weeks, not just hours) with the radio. This initial write-up is just to share my first impressions.

Moving on…

Since there simply wasn’t enough band activity and the X-class flare created more band noise than normal, I wasn’t able to properly evaluate the X6200’s filtering (thus how it might handle a pileup, crowded band conditions, etc.). I also couldn’t get a good read on the radio’s noise floor and overall audio characteristics.

I did, however, spend nearly two full hours with the X6200 going full bore sending CQs, so I had quite a bit of hands-on time, and I feel the X6200 got a proper burn-in period.

First, I’ll share the observations I made (both pros and cons), then I’ll try to answer your questions. Continue reading Xiegu X6200 Trial by Flare: Answering your questions and sharing my field notes →

Guest Posts, News, Portable, QRP, QRP Radios, Reviews

Bob takes a look at the (tr)uSDX

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Many thanks to Bob (K7ZB) for sharing the following guest post:

A CW Operator’s First Look at the (tr)uSDX by Malahit

by Bob Houf  (K7ZB)  

April 22, 2024 – Gilbert, AZ

I recently bought an assembled (tr)uSDX from Amazon.com [affiliate link] in April, 2024, the mainboard is version 1.2 and the RF board is version 1.0.

Due to antenna limitations – a 17-foot wire antenna with a 6-foot counterpoise hanging from a second-floor condo balcony, matched through a Tokyo Hi-Power antenna coupler for an SWR well below 2:1 – I’ve been operating exclusively on the 20-meter band.

A short coax run into the dining room has given me some great on-air time over the weekend, with good band conditions for 20-meter CW.

The radio powers up when 13VDC is applied and I quickly figured out the menu structure with the minimal documentation available from DL2MAN.

I’ve learned that the filter is best set to 500Hz and it is effective for the conditions, and as the band gets hot with all the various weekend contests, I drop in a little attenuation and soon the radio begins to sound good – actually, for the money, it sounds really good.

QSK set to ON allows my keyer in Iambic B to do a good job and I don’t miss any contacts which are forthcoming across the US from Oregon out to the East coast, on down to the Virgin Islands and then, quite a surprise, my Magnificent 7 Watts is heard for a choice contact with a VK2 down under.

I pound out contest QSO’s all up and down the band, adding in a few SOTA and POTA stations and very few have trouble copying me – I certainly had no problem copying weak signals from them.

I do notice that this is not a $1,500 transceiver, especially in the receiver performance, but for the price the satisfaction derived from effortlessly working CW makes up for any limitations.

During the MST contest, as I write this, stations were piled on top of each other. I found that tightening the filter down to 50Hz wasn’t ideal – 500Hz worked better for my ears. Signals filled the band from 14.030 to nearly 14.050, ranging from very weak to extremely strong. Thankfully, the well-behaved AGC prevented any ear-splitting surprises.

I also tested SSB mode briefly and it works and sounds good, though I’m unlikely to use it much myself.

Overall, this little gem is far from a toy. With its filters, AGC, attenuator, and fine-tuning, it should bring a smile to any CW operator’s face.

Accessories, Field Reports, Grab And Go, New Products, News, Portable, POTA, QRP, QRP Radios, Reviews, Stealth, Videos

Pedestrian Mobile POTA Hunting: Pairing the KH1 and N6ARA’s Tiny Paddle Plug

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On Sunday, March 3, 2024, I had a couple of errands to run in downtown Asheville and also had to pick up my daughter.

I ended up having about 40 minutes to kill and, since I had my Elecraft KH1 field kit packed in my EDC bag, I thought it might be fun to fit in a little radio time.

Since I was downtown, the only viable POTA site to hit would be the Thomas Wolfe Memorial–you might recall my activation there last year–but technically, the park was closed. It is an urban park in the middle of Asheville, and there are no gates to keep people from walking across the grounds, but still, I’d feel better activating with permission from the staff first. (I’m pretty sure they’ll grant that permission, by the way.)

Instead of activating, I decided to do a little POTA hunting.

I parked at the spot where I planned to meet my daughter and grabbed my KH1 field kit.

Upon opening it up, I remembered that I had put N6ARA’s new KH1 TinyPaddle Plug Adapter in the M40 case!

My good friend, Ara (N6ARA), designed a small 3D-printed adapter that allows his TinyPaddle Plug to fit the KH1 securely. He sent me (free of charge) this new key/adapter to evaluate.

The adapter is a super simple design that works with the TinyPaddle Plug (not the TinyPaddle Jack).

I hadn’t used this new adapter in the field yet–I only very briefly tested it at the QTH a couple of days prior.

I mentioned last year, shortly after the KH1 was introduced, that I expected a number of 3rd party paddles to start appearing on the market. Since the interface with the KH1 is a standard 3.5mm plug, it does open the door to 3D-printed designs and experimentation. Admittedly, it’s a small space to fit in a paddle, but it’s doable.

I believe N6ARA was actually the first non-Elecraft paddle I used on my KH1 because his TinyPaddle Plug will fit it natively. That said, the new KH1 adapter makes it a proper secure fit–the way it should be!

Side Note: The OEM Elecraft KH1 paddles (the KHPD1s) are now in Revision 2, and all KH1 owners (who received the original paddles) will get version 2 paddles eventually via Elecraft for free.

The original KH1 paddles have a green circuit board.

I haven’t received my Rev 2 paddles yet, but I know I will before long. It’s my understanding that the Rev 2 paddles have a much better feel, and keying is more accurate.

Still…it’s brilliant that Elecraft used a standard jack so that we hams can design our own paddles if we like.

The TinyPaddle Plug

Ara’s TinyPaddle design is super simple, and while he originally designed the TinyPaddle to be a back-up option, I know a number of hams who use the TinyPaddle as their main field key.

If you’d like to hear more about the TinyPaddle and Ara (N6ARA), I’d encourage you to listen to this recent episode of the Ham Radio Workbench podcast when he was our guest. He’s such a brilliant fellow.

Park Lot Pedestrian Mobile

Again, I can’t stress how cool it is to have a radio that allows you the flexibility to hit the air pretty much anywhere, anytime.

The KH1 is so quick to deploy, low-impact, and low-profile.

It’s as conspicuous as holding a transistor radio with a telescoping whip. So far (it’s still early days, let’s be honest here) no one has seen me with the KH1 and asked me if I’m a spy. I can’t count the number of times I’ve been asked this over the years of POTA activating!

POTA Hunting vs. Activating

Even though both activities–hunting and activating–are a part of the same program, they are very different animals. Continue reading Pedestrian Mobile POTA Hunting: Pairing the KH1 and N6ARA’s Tiny Paddle Plug →

Accessories, Field Radio Kits, News, Portable, POTA, QRP, QRP Radios, Reviews, Videos

Elecraft KH1 Tabletop Mode: The new KHRA1 Right-Angle Adapter makes for a super-portable POTA machine!

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It’s funny how sometimes one small accessory can have a huge impact on a field radio kit.

When I first learned about the Elecraft KH1 (basically, the day I was invited to join the volunteer testing group), I felt like Elecraft had designed my ideal QRP radio. The KH1 is super compact, weighs 13 oz completely loaded, covers my favorite bands, and has features I would expect in much pricier radios. It reminded me of my beloved KX1, but even more portable with more features.

The KH1 caters to handheld or pedestrian mobile operating–at least, that was the overarching design objective. It accomplishes this amazingly well. It’s so easy to operate handheld, and there’s nothing else quite like it on the market. I suspect that when others copy the design (I’m sure they’re already doing so–!) it won’t be as versatile, functional, and lightweight.

At the end of the day, though, I feel like I’m only using the KH1 pedestrian mobile about 30% of the time I have it on the air. Of that 30%, I’d say that only 10% of the time I’m pedestrian mobile while activating, and 20% of the time I’m doing little impromptu radio sessions in parking lots, ballparks, while visiting family, and even on my own mountain property.

While handheld operating is simply a game-changer, I knew I wouldn’t do this 100% of the time with the KH1. It’s for this reason that my very first bit of proper KH1 feedback to Elecraft, well before I had my hands on a prototype, was that a right-angle adapter for the whip antenna would truly round out the KH1’s field prowess.

This would basically give my KH1 the same functionality of my beloved KX2 and AX1 antenna combo, but in an even more portable package.

Turned out, Elecraft already had a right-angle adapter on the design board!

Fast-forward to present day…

Last week, Elecraft sent me a prototype of the right-angle adapter to test and evaluate. They’ve given it the model number KHRA1.

Full disclosure: Elecraft also gave me permission to post a video and article about this new accessory even though (at time of publishing) it’s not even showing up on their website. I will, however, link to it here as soon as Elecraft makes it available. This is an item I would otherwise have tested in private–thanks, Elecraft!

The KHRA1: Small accessory, big impact!

Illustration Source: Elecraft KHRA1 Instruction Manual

The KHRA1 is a simple adapter. Other than metal attachment hardware, most of it is lightweight and 3D-printed from a durable material (I assume the same material they use in the KH1).

Attaching it to the KH1 is very easy.

First, you unthread the large metal thumb nut from the KHRA1. You will need to hold together the remaining KHRA1 components (legs and attachment bracket) so that they don’t come apart before you attach them to the KH1. This is actually pretty easy to do, but users should know to follow the KHRA1 instruction sheet. If these parts fall apart in the field, it might require a bit of searching the ground for the pieces.

You simply thread the large thumb nut onto the KH1’s whip antenna antenna port, then thread the rest of the KHRA1 bracket/legs onto the large thumb nut.

Check out Elecraft’s illustration:

I then position the KHRA1 legs as shown above, then tighten the KHRA1 adapter so that everything is secure.

It’s super simple to do, and you can see this process in my activation video below.

Speaking of an activation…

On Saturday, March 2, 2024, (yes, only two days ago) I had my first small window of opportunity to squeeze in a POTA activation and test the KHRA1.

That day, my daughters and I had a number of errands to run, then a three-hour round-trip drive to pick up my wife. We were on a very tight schedule, but I had a 30-ish minute window of opportunity to fit in some POTA radio therapy.

I set my sights on the easiest-for-me-to-hit POTA site on the Blue Ridge Parkway: the Folk Art Center.

Amazingly, I discovered that morning, that the KHRA1 fits in my Pelican M40 Micro case along with my KH1, whip, counterpoise, key, spare N6ARA key, and earphones.

With the KHRA1, this means my M40 field kit can do both pedestrian mobile and tabletop operating. Woo hoo!

The weather that morning was simply glorious. A very wet front swept through the previous day leaving behind clear skies and warm temps. Frankly, it was a bit odd activating without wearing a jacket or hoodie.

Gear:

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On The Air

Setting up was quick and easy, even though this was my first time using the KHRA1 in the field.

I hopped on the air and started calling CQ. Once spotted (for some reason the RBN auto-spotting feature wasn’t working again), the contacts started flowing in.

I worked a total of 18 contacts in 16 minutes. It hardly gets better than that for a CW activation!

I had to call QRT after my 18th contact. Even though I had a 30-minute window to POTA, nearly 14 minutes of that was taken up with my intro and summary for the activation video.

I called QRT with a small pileup still in place. I really hate doing that, but I had a schedule to keep!

QSO Map

Here’s what this five-watt activation with a 4′ telescoping whip antenna looked like when plotted out on a QSO Map:

Activation Video

Here’s my real-time, real-life video of the entire activation.  As with all of my videos, I don’t edit out any parts of the on-air activation time. In addition, I have monetization turned off on YouTube, although that doesn’t stop them from inserting ads before and after my videos.

Note that Patreon supporters can watch and even download this video 100% ad-free through Vimeo on my Patreon page:

Click here to view on YouTube.

A super-portable, low-impact POTA machine!

The KH1 works amazingly well as a tabletop radio when combined with the KHRA1 adapter.

At the end of the day, the KHRA1 is a very simple piece of hardware, but it effectively transforms the KH1 from a handheld radio to a tabletop.

Of course, I’ve used the KH1 numerous times with wire antennas in a tabletop configuration (I’m a massive fan of wire antennas) but the ability to use the 4′ whip antenna and internal KH1 loading coils means that I can operate anywhere I have a surface.

As I mentioned in a previous post, in some cases, low-impact, and low-profile are key to positive park relations.

Herein lies the thing I love about my KX2/AX1 pairing as well. It’s just with the KHRA1, the KH1 makes for an even smaller, lighter-weight field kit.

Any negatives? The only one I’ve come up with is that the KH1 is so lightweight that I realize I need to carry a small piece of shelf liner (something like this) to provide the KH1 with a bit more grip on a slick park table, especially those composite ones.

Again, I will update this post when Elecraft announces KHRA1 pricing and availability.

Thank you

I still can’t believe the entire kit fits in this small case. Even when I put the KHRA1 thumb screw on backwards!

Thank you for joining me on this quick little tabletop activation!

I hope you enjoyed the field report and my activation video as much as I enjoyed creating them!

Of course, I’d also like to send a special thanks to those of you who have been supporting the site and channel through Patreon, and the Coffee Fund. While certainly not a requirement as my content will always be free, I really appreciate the support.

As I mentioned before, the Patreon platform connected to Vimeo make it possible for me to share videos that are not only 100% ad-free, but also downloadable for offline viewing. The Vimeo account also serves as a third backup for my video files.

Thanks for spending part of your day with me!

Have an amazing week ahead and play some radio!

Cheers & 72,

Thomas (K4SWL)

Articles, Field Reports, Guest Posts, How To, Kits, News, Portable, POTA, QRP, QRP Radios, Reviews

QMX – From Kit to Field!

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by Matt (W6CSN)

The Radio

The QMX by QRP Labs is a five band, multi-mode radio introduced by Hans Summers G0UPL at FDIM in 2023. The QMX is the next logical step in the radio development journey at QRP Labs, bringing together the innovative approach to FSK modes like FT8 from the QDX and the CW performance of the QCX series. This is all done in same enclosure as the QCX-Mini which is not much larger than a deck of playing cards.

Size of the QMX compared to standard deck of playing cards.
The QMX is about the size of a deck of cards.

The keen observer will notice that the QMX also sports a built-in microphone which, along with associated circuitry, supports future introduction of voice modes by way of firmware update. Other notable features include SWR metering with protection as well as solid-state “PIN” diode T/R switching, plus the option for “high band” coverage of 20 through 10 meters in addition to the original 80m-20m version.

Most hams have, at one point or other, forgotten to throw the antenna switch, adjust the tuner, or even connect an antenna before transmitting. The SWR meter and protection really sets the QMX apart from earlier QRP Labs radios. There are plenty of sad tales on the QRP-Labs forums from QCX or QDX users that “smoked” the BS170 mosfet finals in a moment of operating into a badly mismatched load. It’s remarkably easy to do, ask me how I know!

The Build

Based on experience with the QCX-Mini and having put together several QDX’s, I admit to being hesitant to starting assembly of this radio. The level of integration in the QMX as a multi-band, multi-mode unit is probably the highest yet to come out of QRP Labs. The components that were merely small in earlier radios are absolutely tiny in the QMX, specifically the LPF toroidal cores. The main board, internal switching power supplies, display, and controls board are all sandwiched together in a tight fit for the custom enclosure.

photo showing a partially completed circuit board
Most of the electronic components installed on the main board.

The build started with a slow and methodical approach of doing a little bit each day and working in the morning when my mind was fresh and there was good light on my workbench, a.k.a. the dining room table.

The first “disaster” happened when performing the factory recommended modification to Revision 2 boards shipped in 2023. The mod calls for a protection diode to be installed across a SMD mosfet. Several leaded 1N4148 diodes were available in my “junque” box so I attempted to carefully fit one of these in the right position on the board. While soldering the diode in place I managed to lift C508, a microscopic .1uF SMD capacitor, clean off the board!

photo of circuit board with modifications
The suggested modification adding a protection diode.

Given the tools at my disposal, there was no way I was going to be able to get that capacitor back into place. Therefore, I grabbed a standard through hole .1uF cap and painstakingly got it connected in the right place, verified by lots of continuity testing.

Once finished with all the electronic components on the main board, I was feeling pretty cocky and also the completion of the project was more clearly in view. The cautious and methodical approach gave way to a faster build pace, which directly lead to the second “disaster.” While installing the headers that connect the main board to the display board, I failed to CAREFULLY READ THE ASSEMBLY MANUAL and soldered the male pin headers where I should have installed the female sockets!

This misstep might have ended the project right then and there if I had not at some point in the last year bought a proper desoldering tool. This is not an expensive automatic vacuum pump powered solder re-work stations, but rather a heating tip and manually actuated solder sucker built into one tool. Twenty-two unsoldered connections later, we were back on track. Continue reading QMX – From Kit to Field! →