All posts by Thomas Witherspoon

Field Reports, Guest Posts, News, Portable, POTA, QRP

Code, Contacts, and a Stunning View: A POTA First-Timer’s Experience at the Devil’s Punch Bowl

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Many thanks to Anthony (M7TAW) who shares the following guest post:

A first timer’s POTA activation at the Devil’s Punch Bowl!

Anthony (M7TAW)

Introduction

Let me start with the confession that I am an amateur radio operator born out of the Covid lockdown. With the switch to remote examinations by the RSGB in 2020, and a lot of free time on my hands, I thought why not get myself on the air! However, it wasn’t until this year, and a nice birthday gift from the fiancée, that I finally managed to reach into the HF bands with a (tr)uSDX.

This 5W QRP multiband and multi(ish) mode transceiver was going to be my first serious foray into what I deemed “proper radio”. So, I endeavoured to try and learn and maximise every bit of usage I could out of it. Like many newcomers to radio, I started with getting an EFHW strung out my window and got onto digital modes with FT8 on 20m just to confirm that I could in fact be heard. I also managed to SSB over to Italy at one point, though the in-built microphone gave me a 337 RST. At this point though, I was buzzing to be heard!

That’s USB covered, but what is this CW mode I can select?

As a graduate in history, there’s something about “old timey” technology and methods that intrigue me. Don’t get me wrong, I’m a technophile at heart (you kind of have to be a data scientist), but there’s something about post-industrial mechanical and electrical advancements that amazes me still!

Of course, morse code was going to be next on the list of things to explore then it seemed!

I ordered a cheap but decent key from our favourite Chinese marketplace, and started cramming LCWO, Morse Mania, and Morsle as much as I could, and getting that muscle memory rhythm with practicing sending the alphabet and my name. Luckily, the (tr)uSDX has a practice mode and a decent decoder in-built so I can just power the radio from a USB connection and practice away!

No better setup than practicing on the sofa in your pyjamas.

Naturally, the YouTube algorithm decided that if you’re learning about CW, you might also be interested in this POTA thing. A few K4SWL videos, a dash of K2EJT, and a splash of newcomer-encouraging KI7QCF, I was hooked. I could combine what I’d started learning, with equipment in the field, and also a slight competitive (I’m eyeing that top spot) and award-based activity.

I started obsessively watching POTA spots on Gridtracker to make sure I could hunt FT8 contacts, and also kept my eye on the spots for any CW contacts that I thought I’d be able to hear. Finally I did it; about 25 days after I seriously started learning CW, and with a bit of a crutch with the morse decoder on the radio, I finally made a POTA hunter CW QSO – DC5LY (pota.app) thank you very much.

As fun as hunting is, I had to follow the YouTubers I’d been watching and actually get out there for an activation. However, actually getting out there – shudders – in public and getting my antenna up seemed a daunting task. Add in the fact that I was determined to not rely on digital only to get an activation, but also CW.

I started to plan…

Firstly, I looked for sites that had decent parking, but were also probably big enough that I could tuck away uninterrupted (something to take the nerves away). Luckily for me, about 20 minutes up the road is a large stunning National Trust area known as The Devil’s Punch Bowl – the legend has it that the Devil scooped up a handful of earth and hurled it at Thor, God of Thunder, the depression that remained is the Devil’s Punch Bowl. Also, unluckily for me, I had to take a day off work to visit the dentist, so why not mitigate that by trying out my first activation!

Wealden Heaths SPA – Devil’s Punch Bowl Site of Significant Scientific Interest (GB-0243)

Devil’s Punch bowl – Surrey Hills National Landscape
GB-0243 Wealden Heaths SPA – Devil’s Punch Bowl Site of Significant Scientific Interest (pota.app)

Gear

When planning for this little adventure, I thought to myself that I’d likely panic if I had to combine putting up a mast for an EFHW or trying to throw a wire in the tree for the first time. Coupled with the fact that the (tr)uSDX doesn’t come with an ATU, I thought why not invest in a quick and easy vertical. After a bit of research, and another visit to our favourite Chinese marketplace, I opted for a JPC-12 vertical antenna along with an investment in a NanoVNA.

The (tr)uSDX comes with an inbuilt SWR meter but I wasn’t sure how reliable it was, and I’d have a hard time tuning with it. I grabbed some 18650 batteries and the stage was set! Helpfully, the JPC-12 antenna comes with a nice little carry case with supplementary space, and the compact size of the (tr)uSDX means I could just throw everything in there.

Full gear list and links below:

Setting up

I was up bright and early on a Friday morning, and headed over to the park slightly nervous, but also excited!

As a nervy POTA first timer, my original plan was to maybe just activate from the car park and hide my antenna behind my car. However, when I got there, it became very clear that there was nowhere to hide, and frankly there weren’t many great spots to plant a vertical in the ground.

I’d have to suck it up, and venture deeper into the park! After grabbing my backpack, and trotting down a marked route, I chose to go left onto a track that bikes weren’t allowed in the hope that it’d be quieter. Albeit the path was quite dense with overgrown bushes and plants. I was beginning to think I’d not have a clearing to even sit in, let alone mount the antenna.

What a view.

However, a couple of minutes later I chanced up a bench and table that was nestled slightly into the trees with a bit of a clearing! It was like the POTA gods had answered my calls for a perfect location. I quickly plonked my backpack on the table, claimed the spot, and started unpacking the gear. You can see below how efficient I’d been in packing, and I was surprised myself how I could get this antenna and all the equipment I’d need neatly into my bag.

Can’t recommend this antenna enough (with my limited experience)

A few minutes later, the vertical was up, and I’d got it tuned to 40m like I’d practiced at home. Helpfully, the loading coil has marked points which correspond to the bands, and all I had to do was slightly adjust the length of the whip whilst keeping an eye on the NanoVNA. I got it down to 1:1.18 around the CW bands for 40m in Europe (7000-7040MHz) – couldn’t be happier!

What a find for a first-time location!

On The Air

Part 1 – A job half done

Now came the exciting part! Finally getting on the air portable for the first time and POTA for the first time! I thought I’d settle my nerves by starting with the familiar FT8. I booted up FT8CN, and plugged the (tr)uSDX into the phone. A few firmware updates ago, the (tr)uSDX got audio over USB, and being able to plug it directly into the phone with a single cable and receive and send FT8 seems like magic to me. Continue reading Code, Contacts, and a Stunning View: A POTA First-Timer’s Experience at the Devil’s Punch Bowl →

Field Reports, News, People, Portable, QRP, Travel, Videos

A Radio-Active Day in the Triangle: POTA, Satellites, & Southern Hospitality in the Summer Heat

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As mentioned in previous field reports, my wife and I spent the week of July 7th, 2024, in Wilmington, North Carolina, while our daughters were at summer programs at NCSU and UNCW.

We had an amazing time and I managed to squeeze in some Parks on the Air (POTA) activations at Brunswick Town/Fort Anderson State Historic Site, Carolina Beach State Park, and an epic activation at the Battleship North Carolina!

On Sunday, July 14th, we packed our bags and drove to Raleigh where we visited the NC History Museum and NC Museum of Natural Sciences. We were in the midst of a heat wave, so the time spent indoors at the museums was much appreciated.

A beautiful display of vintage radios in the NC History Museum.

I had my Elecraft KH1 packed and planned to activate the State Capitol (US-6852), conveniently located next to the museum parking lots. The State Capitol grounds truly requires a super low-impact radio like the KH1 due to the strong security presence and limited setup space.

Upon arriving at the State Capitol, we found a large gathering (possibly a protest) and sweltering heat (104°F/40°C)! I decided to postpone the activation and instead opted for an early morning activation, the following day, at William B. Umstead State Park, just a ten-minute drive from our hotel.

I checked the park’s website and discovered that the gates opened at 8:00 AM. This was perfect: I could grab breakfast at 6:00 AM, catch up on emails, head to the park, activate until 9:30 AM or so, return to the hotel, and still have enough time for our 11:00 AM Duke University tour. (The reason we spent extra days in the Raleigh/Durham area was so that our daughters could tour NCSU, Duke, and UNC Chapel Hill.)

William B. Umstead State Park (US-2755)

I arrived at the park just a few minutes after the gates opened.

Although I had never been to William B. Umstead State Park, I had studied a map beforehand and knew there was a picnic area accessible from the entrance I chose (the park has multiple entry points, and I selected the one closest to our hotel).

It’s a beautiful park, and the contrast between the morning commuter traffic and the oasis of trees was striking! I parked at the first picnic area I found, grabbed my radio pack, and chose a picnic site.

This early in the morning, the picnic area was deserted – I only saw runners, walkers, and park staff.

Setting up

For this activation, I brought my Penntek TR-45L and paired it with my KM4CFT 30M end-fed half-wave with a 40M linked extension.

Although I found an ideal setup spot, the surrounding trees proved to be a challenge! The branches were either too low or too high. After some effort, I managed to snag a suitable branch with my throw line, deployed the antenna, and was ready to get on the air!

Gear

Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.

On The Air

Being this early in the morning, I started the activation on 40 meters.

I called CQ POTA only for a short time before the hunters found me. Fortunately, band conditions were pretty respectable! Continue reading A Radio-Active Day in the Triangle: POTA, Satellites, & Southern Hospitality in the Summer Heat →

Kits, New Products, News, QRP Radios

KM4CFT Teases a New CW Field Radio!

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My buddy, Jonathan (KM4CFT), is close to releasing a new CW Field Transceiver kit he designed for POTA, SOTA, and pretty much any other field radio activity.

Today, he shared the following photo, which is a bit of a teaser:

Those of you who attended Four Days in May this year may have already gotten a proper sneak peek and even operated a prototype of this radio.

Jonathan tells me that he’ll be releasing details in the near future and you’ll soon be able to order the kits via Radio Dan’s eBay store [eBay partnership link] or via his website.

Of course, I’ll also post details here on QRPer.com when the new radio kit is live and ready to order! Stay tuned!

News, Portable, POTA, QRP, Travel, Videos

Video: IX1CKN & IW0HK’s Friedrichshafen ’24 POTA Rove

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Many thanks to Christian (IX1CKN) for sharing the following video recorded during his multi-park rove with Andrea (IU1APL).

The video was only recently published, but I’ve added it to Christian’s original field report. We’re highlighting it here for those who may otherwise miss it. (Note: Some of the video is in Italian, but YouTube closed captioning can auto-translate.)

Click here to view on YouTube.

Antennas, Field Reports, News, Portable, POTA, QRP, Travel, Videos

Beautiful POTA activation at Brunswick Town/Fort Anderson and Afternoon in Southport!

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On Wednesday, July 10, 2024, my wife and I were in the middle of a week-long stay in Wilmington, North Carolina, while our daughters attended residential programs at NCSU and UNCW.

That particular day, we couldn’t decide what to do because the weather was fickle! Temperatures and humidity were high, fueling a constant string of isolated thunderstorms rolling over Wilmington and the Cape Fear River area. Every hour or so, a new storm would roll past.

Heather suggested I fit in a POTA activation, and, of course, I loved the idea. I just didn’t want to play radio anywhere near thunderstorms.

We decided to drive south to one of my favorite coastal towns in North Carolina: Southport. Based on the weather radar, it looked like we could drive to Southport on the west side of the river, then return via the Fort Fisher Ferry on the east side, potentially avoiding most of the isolated thunderstorms moving north along the coast.

After stopping in Leland for supplies, we made our way to Brunswick Town/Ft. Anderson State Historic Site, directly across the Cape Fear River from where I’d activated the previous day at Carolina Beach State Park (US-2722).

En route, we drove into a thundershower with rain so intense that most cars on the road turned on their hazard lights and slowed to a crawl. Visibility was nil.

Fortunately, the heaviest rain only lasted 10 or so minutes, and by the time we were two minutes from the park entrance, it had slowed to a drizzle. As we parked at the visitor’s center, it had all but cleared up.

Brunswick Town/Ft. Anderson State Historic Site (US-6834)

Brunswick Town/Fort Anderson State Historic Site is unique in that it offers a blend of colonial and Civil War history along the beautiful Cape Fear River.

Founded in 1726, Brunswick quickly grew into a bustling port town known for exporting naval stores. However, the town was burned by British troops in 1776 and never rebuilt, leaving behind ruins for visitors to explore today.

During the Civil War, Confederate forces constructed Fort Anderson atop the remnants of Brunswick. The fort’s earthen walls and impressive gun emplacements now stand as a reminder of the region’s strategic importance during this turbulent period.

Visitors can explore the colonial foundations and Civil War earthworks, while enjoying the river waterfront.

There’s also a visitor’s center with exhibits detailing the area’s rich history.

I was pleased to spot a picnic area on the opposite side of the parking lot from the visitors’ center. This would allow me to set up close enough to the car that if another storm approached, I could pack up quickly.

First, I introduced myself to the staff and asked for permission to activate. I was confident they would grant it, as this site had been activated 39 times already (mine would be the 40th).

The two park rangers inside were incredibly kind and accommodating. My wife and I ended up speaking with them about history for nearly 30 minutes. I also gave them more insight into the POTA program and asked if activators were following their rules. Fortunately, they gave a very positive report. NC State Historic Sites protect both the archaeology of the site and the natural resources, so I always ask for permission to activate because some sites have restrictions about putting lines in trees or stakes/spikes in the ground. Fortunately, this was not an issue at the picnic area.

Setting up

Since weather was iffy and since Heather and I wanted to spend the rest of the afternoon in nearby Southport, I decided to pair my Elecraft KX2 with my AX1 antenna.

This also gave me a chance to try out a new 3D-printed bipod that my friend Mike (KE8PTX) sent me.

This Bipod consists of a 3D-printed clip and knob designed by Adam (K6ARK) and two legs designed by Mike.

I was really amazed at 1.) how easy it was to attach the clip to the antenna’s BNC base and 2.) how incredibly stable this Bipod felt even compared with the OEM bipod.

Thank you, Mike (and Adam)!

With the radio set up, I was ready to activate!

Gear

Note: All Amazon, CW Morse, ABR, Chelegance, eBay, and Radioddity links are affiliate links that support QRPer.com at no cost to you.

On The Air

I assumed 20 meters would be the best place to start and, frankly, I hoped it would be productive enough to cap off my activation in short order so that my wife and I could continue our travels.

Unfortunately, propagation was not compliant. Continue reading Beautiful POTA activation at Brunswick Town/Fort Anderson and Afternoon in Southport! →

Field Reports, Guest Posts, News, Portable, POTA, QRP, Videos

Christian Chases Greyline DX on Support Your Parks Weekend!

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Many thanks to Christian (IX1CKN) who shares the following field report:

A Breathtaking “Support Your Parks” Weekend in IT-0120

by Christian (IX1CKN)

…Day 1

The goal I had in mind was to take advantage of early morning greyline from a POTA reference, combining the appeal of an activating station with the propagation opportunities at that time of day. In this part of the season it means being active around 3/3:30 UTC, and although I didn’t manage it on day one, Saturday 20th July 2024, I went out much earlier than usual and had a few surprises, confirming the idea’s potential.

I chose IT-0120, the Tsatelet Nature Reserve, my “home reference”, because a short trip is needed to be active quickly. I was happy to go, both curious about how it would turn out and because it was the “Support Your Parks” weekend. If there’s pride in being part of this program, these are the two days to show it. The setup was as usual: Xiegu G90 with a ground-mounted 1/4 wave vertical antenna. Given the lighter battery (I had to walk to the top of the reserve), I lowered the power to 10 watts for a longer duration.

With these thoughts in mind, at 6:44 UTC, I powered up on 20 meters. After a “park to park” with a colleague in Lithuania, which I took as a good omen, I moved to a clear frequency and started calling. The first 2-3 minutes were silent, but then I got a response that changed the day: “…KL7TC.” Alaska, for the third time! Bill in Fairbanks was coming in at 5/7-8 with that unmistakable transpolar signal fluctuation. He gave me a 5/1, and when I told him I was running 10 watts, he congratulated me. I grabbed my phone and filmed part of the QSO, so expect a video. From here on, every QSO was a bonus.

Five minutes later, as the skip started to Europe, KZ4CP, Brandon from Kentucky, answered. He came in strong (another 5/8 from me), and on the second over, he said my signal jumped to 5/8. It was 6:56z, I logged it, filled with gratitude, and moved on, thinking that this project should be realized as soon as possible. From Europe’s perspective, things were slower, but responses continued, albeit at a low rate. I also managed another “park to park,” the second (and last of this activation), with LA7TN. I couldn’t hear the others on the cluster.

Don G0RQL joined in, making it the 10th QSO. The activation was valid. However, I regretted not exploring other bands. After checking and hearing a few decent signals, I switched to 15 meters, calling for five minutes with no luck. Then, I moved to 17 meters: no response to my CQ, but I heard VK3IO, Ron, near Melbourne. It was 7:33z, and although he wasn’t very strong, he was still a solid 5/7. I waited for him to finish his QSO and called. After some persistence, he got my call. The report was 4/3, but even if it were lower, the joy of covering over 16,000 km with 10 watts is incomparable (there will be a video portion for this too).

At this point, it was close to 10 local time (8 UTC). The sun was starting to heat things up (including the G90 chassis, which has a known issue with heat dissipation), but I had one more experiment. The Chinese multiband vertical is designed for 20 to 10 meters, but with a coil I bought earlier, it can do 40 meters too. I added the component, found a clear frequency (7130), and started calling.

I had noticed a couple of times that this solution is a compromise, not very effective. However, it brought in another 5 QSOs: with Piedmont, Tuscany, Lazio, and France. So, it did something and was better than nothing. I wrapped up after 68 minutes of activation with 17 contacts logged. The slow rate indicates conditions aren’t ideal yet, but with Alaska, Kentucky, and Australia (for the first time from a park) in the log, and a breathtaking view of Aosta, there’s no room for complaints. See you next time, and thanks to everyone!

Video – Alaska and Australia:

…Day 2

A thunderstorm hit Aosta at 5 AM. No thunder, just a continuous rumble like an engine, with flashes of lightning every few seconds. Enough to wake me up, though sleep is always welcome (especially on a Sunday). Once it stopped, I didn’t curse the rain but seized the opportunity to get closer to my original project. So here I am, in the car, arriving at IT-0120, the Tsatelet Nature Reserve, at 6:44 local time, 4:44 UTC, on Sunday 21st July 2024, for a POTA activation not exactly at greyline, but still early morning.

Clearly, I couldn’t use Saturday’s setup. The storm had created puddles and stagnant water, making it impossible to set up outside. So, I decided to operate from the car, with the Xiegu G90 remaining the core of the portable shack, but swapping the ground-mounted 1/4 wave vertical antenna for the Outback Falcon HF-1899 on the car roof. Definitely less efficient, but if we wanted to do this today, this is how it had to be done.

Also, I had a less capable battery than the day before, so I lowered the output power to 10 watts to ensure longer operation. As soon as I turned the radio on 20 meters, I was amazed by the number of American accents I heard. I listened to VE3GXT calling CQ POTA from Ontario with a solid signal, but despite my responses, he couldn’t hear me. So, I found a free frequency and started calling. The pace was slow, as seen the day before, but something happened.

First, Joe WB2WKJ replied, explaining that it was his first time “hunting” a park from Italy. However, he only gave me a 3/3 in New Jersey, making it clear that receiving is one thing, and transmitting (and being heard) is another. I kept my spirits up, and soon W3MJB, Mike from Pennsylvania, responded. This time, the report was 5/2, which sounded more in line with a QRP station. The “park to park” call that followed was thrilling.

It took a moment because the signal wasn’t strong, but it came from VK3YV Tony, activating in Victoria, Australia. I got no more than 3/1, but the noteworthy part was that 10 watts and a vertical on a car were reaching the other side of the world (a first for me with POTA). Feeling encouraged, I searched for another activating station from “Down Under,” VK2USH in New South Wales.

Again, I was heard with difficulty (which was to be expected), but we completed the contact, and I felt that even if I didn’t reach 10 QSOs, the activation was worth the day. Before the skip shortened, I heard a station from New Zealand and, out of curiosity, on 15 MHz, the WWVH time signal from Hawaii, which, in a surreal twist, arrived simultaneously with WWV (from Colorado).

You’d expect to hear only one of them (the one from the Pacific) at that time of morning, but there are propagation theories, and then you turn on the radio and hear what actually comes in. The calls continued, and I logged KZ4CP, Brandon from Kentucky, for the second day in a row, and KN4DY Randy from Georgia. From him, I even got a 5/3, the highest signal report of the day from across the Pond.

It was 6:50 UTC, and Europe started responding. The activation, previously an uphill battle, leveled out. Many Spanish friends and other familiar POTA faces enriched the log. When I reached a good 20 contacts, I tried moving to 40 meters. Again, the antenna wasn’t very effective on that band, but I managed about ten contacts, including Belgium, the UK, and Austria.

In the end, I made 31 contacts in 3 hours. The rate remained slow, but today, more than ever, I saw firsthand how greyline phases or signal enhancements on shortwave can hold surprises. Sure, with more power, much more could have been achieved (besides Canada, even KD9VVS Nick activating from Indiana couldn’t hear me). I thought about “only” 100 watts, but there will be time to keep testing. Low power is a philosophy, but it shouldn’t become a dogma, because the beauty of radio is giving meaning to what we do.

Today, no activation pictures to accompany the post (also because IT-0120 has been featured on QRPer a few times now), but a video. Apologies if it’s not strictly about hamradio, but the two signals from Hawaii (the one with the female voice) and Colorado (male voice), rarely received so clearly here, demonstrate better than many examples how shortwaves are made to travel far, how thrilling it is to chase them, and how intense this “Support Your Parks” weekend has been.

Video – Time Signals:

Articles, Digital Modes, Guest Posts, How To, Portable, QRP, QRPp

Beyond the Beacon: Conrad Discovers the Unexpected Benefits of WSPR

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Many thanks to Conrad (N2YCH) who shares the following field report:

QRPppppp….WSPR

By: Conrad Trautmann (N2YCH)

WSPR, or Weak Signal Propagation Reporter, is a digital mode you can select within WSJT-X. You can use the data that’s generated by the WSPR network to check your own antenna’s performance for transmitting and receiving and also to see what paths are open by band at a particular time of day from your QTH. Recently, I’ve been using WSPR to improve my own antenna systems and to help reduce local noise sources.

Originally developed by Joe Taylor, K1JT, an approximately two minute QRP transmission contains the originating station’s call sign, the maidenhead grid locator and the transmit power level being used. Stations typically use 250mw up to 5watts when they send these signals. WSJT-X allows you to select how often you want to send this transmission and what bands to transmit on. There’s an embedded schedule in WSJT-X that allows “band-hopping” for stations using a multiband antenna to transmit on different bands. When not transmitting, it listens for and decodes other stations transmitting and can post “spots” of those stations to the WSPR network database.

WSJT-X WSPR mode
WSPR Band Hopping Schedule (click to enlarge)

Here on QRPer.com, Thomas, K4SWL posted in this field report what the various flavors of QRP power levels are…

  • QRP: 5 watts to 1 watt (for some contest 10 watts = SSB QRP)
  • QRPp: Less than 1 watt to 100 mw
  • QRPpp: Less than 100mw

Did you know that there are more than 3,000 WSPR HF beacons running on all of the amateur bands all over the world at QRP power or less? Many are running 250mw or less. If you open up WSJT-X and select the WSPR mode, you’ll see that the pull down for power levels give you these options:

  • 37dbm = 5w
  • 33dbm = 2w
  • 30dbm = 1w
  • 27dbm = 500mw
  • 23dbm = 200mw
  • 20dbm = 100mw
  • 17dbm = 50mw
  • 13dbm = 20mw
  • 10dbm = 10mw
  • 7dbm = 5mw
  • 3dbm = 2mw
  • 0dbm = 1mw

You could transmit your own beacon if you choose to using WSJT-X. You can also receive many of the 3,000+ beacons that are on the air right now if you wanted.

Why, you ask?

Let me tell you about the WSPR journey I’ve taken over the past few months and how what I’ve learned has benefitted me, my station and my antennas. Here’s how extreme QRPpp signals can help all of us.

I’m an avid digital operator, and I’ve tested many of the digital modes that WSJT-X, FLDigi, VarAC and others have to offer.

WSPR (Weak Signal Propagation Reporter) is a program embedded as a mode in WSJT-X and you can set it to transmit at the various power levels I listed above and band hop to different bands if your antenna can support those frequencies. When it’s not transmitting, it will receive and post the beacons it hears to the WSPRnet.org web site. For anyone familiar with pskreporter.info, WSPRnet.org is similar in that it provides maps of where and when “spots” are received and the relative signal strength the signals were when received by station, the mode and frequency.

After setting my station to transmit and receive on WSPR and looking at my spots on WSPRnet.org that were reported by receiving stations over the previous day, it was a thrill to see my 250mw signal making it out all over the world. Amazing actually, that such a small amount of power could travel that far. 250mw to Antarctica? That’s pretty good.

I bought a QRP-Labs QCX transceiver and the external companion GPS clock, which supports running WSPR transmission stand alone, without tying up a computer. Then I learned about the Sotabeams WSPRLite Antenna Tester (a 250mw WSPR transmitter) and the various WSPR transmitters offered by ZachTek which can also run without needing a computer.

My goal was to have WSPR beacons transmitting on as many bands as possible. Combining them into a single, multiband antenna posed its own problems, which is a topic for another article. However, all of these solutions just transmitted. I was hoping to also be able to receive and post spots as well.

Then, QRP-Labs (shout out to Hans Summers) came out with the QDX and then the QMX, both of which connect to a PC and are controlled by WSJT-X to do the band hopping transmitting and receiving. Like FT8, WSPR does depend on timing to work best, so using an external GPS clock for the QCX or connecting a QDX or QMX to a computer that can get it’s time from the internet can help keep the transmission cycles in sync with the receiver sites for best reception results.

Various WSPR transmitters and transceivers

This is cool stuff, but still, what’s the point? That’s when a friend I made in the WSPR community, Tom, WA2TP pointed out how to use all of these beacons to improve my station’s receiving capabilities. I have a good HF receiver and a dipole antenna and a hexbeam on a rotor and I figured I was good to go. I was making contacts without any problems. Tom told me this: “It’s all about the noise.”

He recommended using a wideband SDR called a Kiwi that can view the entire HF spectrum from 0 -30MHz on a waterfall at one time. My ICOM IC-7610 can connect to a PC and work with HDSDR software which has a waterfall, but it will only show you the spectrum of the particular band you’re on, not the entire HF spectrum at once. The Kiwi shows the entire spectrum from 0 to 30 MHz and when set up just right, you can see noise in there…a lot of noise, emanating from all sorts of things.

If you’re trying to receive a 250mw WSPR beacon signal transmitting from Australia, the noise from the after-market, wall-wart switching power supply connected to your cell phone charger a few feet away from your antenna could be way noisier and will blank that VK beacon right out. Your antenna and ability to hear distant signals is only as good as how low or quiet the local QRM is that we all have to deal with.

So began my hunt for noise, with a lot of guidance from folks with experience at it. Continue reading Beyond the Beacon: Conrad Discovers the Unexpected Benefits of WSPR →

Field Reports, Morse Code, New Products, News, Portable, POTA, QRP, Travel, Videos

Carolina Beach State Park: A QRP Oasis Amidst the Summer Heat and Activities

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Tuesday, July 9, 2024, was a very radio-active day!

I was in Wilmington, North Carolina, and that morning, I had the privilege of activating the Battleship North Carolina from inside the battleship. Click here to read the field report and watch the video.

In short? It was amazing and certainly a fabulous way to start the day.

We were in Wilmington because one of my daughters was attending a week-long program at NC State University, and the other was attending a similar program at UNC Wilmington.

That Tuesday afternoon, after dropping my daughter off on the campus of UNC Wilmington, my wife suggested we hit Carolina Beach State Park for a POTA activation. It didn’t take me a microsecond to agree to that plan!

Carolina Beach State Park (US-2722)

Carolina Beach State Park, located just south of Wilmington, is a unique spot full of natural wonders. The park covers over 760 acres of Pleasure Island, with diverse habitats ranging from the impressive 50-foot Sugarloaf Dune (which used to be used as a navigational aid) to the fascinating limesink ponds, each with its own special plant community.

The park is also home to the Venus flytrap, a rare carnivorous plant found only in a small part of the Carolinas. You can explore the park’s trails, winding through maritime forests and maybe even catching a glimpse of these fascinating plants in action. The park also has a marina for easy access to the Cape Fear River and the Intracoastal Waterway, making it a great spot for boating and fishing.

We arrived at the park a little before 4:00 PM local time. Had it not been so hot and humid, we would have hit one of the park’s trails before finding a spot to do POTA, but the weather being what it was, both of us were happy to spend time in the shade.

We pulled into the main picnic area and quickly found a spot to set up. As I pulled out my radio and camera gear, my wife, Heather, pulled out her travel watercolor kit, all packed in a Tom Bihn HLT1 (we’re a pack geek family!).

When Heather joins me on POTA activations, she almost always sets up somewhere and paints while I activate. I love the fact that we both enjoy the experience in different ways.

In fact, my buddy Steve (KC5F), who is also an avid POTA activator, performs almost all of his activations with his wife, who also paints while he activates. He told me that she likes a good couple of hours of painting, so he typically racks up a lot of contacts in that amount of time.

Setting Up

The first thing I did was set up my Thermacell mosquito repeller–it needs a few minutes to do its thing and clear out the mozzies. The model I carry, the “backpacker,” fits a standard backpacking stove canister. I’ve recommended this one to many other POTA ops who operate in areas with mosquitoes–so far, it’s never let me down!

Also, I want to send a big shout-out to Alanna (K4AAC) and Bob (K4RLC) for making this activation even more civilized.

After watching an activation earlier this year at Tuttle Educational State Forest, where I placed my KX2 and logbook on a wet and dirty picnic table–covered in pollen and other tree bits–Alanna ordered a blue Gingham picnic tablecloth and whisk and had it sent to me.

I’ve had this tablecloth packed in the go-box I keep in the Subaru, and this activation was the perfect time to put it to use because the table I chose needed cleaning!

Thanks, Bob and Alanna!

Next, I deployed my PackTenna 9:1 End-Fed Random Wire antenna and paired it with my Elecraft KX2.

New paddle mount!

I did (finally) get to try out a new piece of kit in the field: a newly-designed paddle mount from Steve (KB3SII) at QRPworks.

Steve handed this prototype mount to me at Hamvention this year. It’s an updated design of one we tested last year.

You basically attach the mount to the front of the KX2 (or KX3) and place a paddle like the Bamakey TP-III that has strong rare earth magnets. The paddle locks onto the metal pad and makes for a rock-solid, ergonomic keying experience.

Steve also sent me two short 3.5mm angled cords to connect the key to the radio, but I forgot to pack them for the trip. My standard paddle cable worked fine, although I had to angle the TP-III slightly.

Note that Steve plans to have these paddle mounts in production and available on the QRPworks website in the coming weeks. When they’re available, I’ll post a direct link.

With the KX2 set up and ready to go, it was time to hit the air!

Gear

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On The Air

I started calling CQ POTA on 17M and discovered that it was a fairly quiet band. Nonetheless, I worked two stations in about six minutes. Secretly, I was hoping there might be a 17M path into Europe, but then again, it was a bit late in the day for that (and it seemed 17M wasn’t terribly energized). Continue reading Carolina Beach State Park: A QRP Oasis Amidst the Summer Heat and Activities →

Digital Modes, Field Reports, FT4, FT8, Guest Posts, How To, News, Portable, POTA, QRP

Karl Heinz’s Pocket-Sized Digital HF Station

18 Comments

Many thanks to Karl (K5KHK) for sharing this guest post, which originally appeared on his blog, Karl Heinz Kremer’s Ramblings:

A Digital Station in Your Pocket

by Karl Heinz (K5KHK)

How small can a complete station to work FT4/8 be? With the QRP-Labs QMX, we have a transceiver that certainly fits the bill for a small station. By itself it can only be used for CW, to use the digital modes, one has to combine it with a computer. Even the smallest laptop is too big the fit into the pockets of my cargo pants – we are trying a pocket sized station after all 😉

In this article, I will describe how to use a QMX transceiver and an iPhone to activate a POTA park with FT8.

The Components

My QMX is the original that was released at FDIM 2023, so it covers 80m to 20m. Mine is serial number #20.

My iPhone is small enough, but unlike Android based phones, the QMX cannot be connected directly to the phone. Apple sells a “camera adapter”, which plugs into the phones Lightning port on one side and provides a USB connection on the other end. $29 for the original Apple part was a bit hard to swallow, so I opted for something cheaper straight from China’s “we clone everything” factories: https://amzn.to/3WDSfUc

[Please note: All Amazon links are affiliate that support QRPer.com.]

 

The picture shows both a USB and a lightning port on the adapter. This should allow the phone to be powered/charged while the adapter is being used – more about that later.

Another limitation is the antenna: The QMX does not have a built-in antenna tuner, and even my QRP sized ZM-2 would have to live in a different pocket 🙂 My plan is to use a resonant antenna so that I would not need a tuner.

The easiest antenna with a good match is a dipole, but that is a bit more challenging to deploy in the field, so I opted for an end-fed halfway (or EFHW) antenna with a 49:1 transformer. I 3D printed a winder that allowed a BNC connector and the transformer to be mounted on the wire winder:

The design came from Thingiverse: https://www.thingiverse.com/thing:2871679

Because I am using a different toroid for the transformer, I had to remove the “bump” that is holding the toroid in place. Going forward, I may change the design a bit more to have so that I can fit more wire on the winder.

For those familiar with the transformers usually used for EFHW antennas, the picture shows two things that are different: As I’ve already mentioned, I am using a different toroid (the Fair-Rite 2661102002 core, which is a type 61), and a different winding pattern. More about that in a future post.

To power my station, I am using a TalentCell rechargeable 12V power bank:  https://amzn.to/3snTyr8

First Test

With everything in place, I tried to make a quick FT8 contact from home with this setup, but with my “big” EFHW antenna in my backyard. Because it was just a quick test, I did not even bother to hook up the charging cable for my phone (more on that later).

The software I am using is iFTx, which supports both FT4 and FT8.

I connected the phone to the adapter from above, connected the adapter via a USB cable to the QMX, and connected the QMX to a 12V power supply (unlike anywhere else in ham radio, 12V here means 12.0V and not the usual 13.8V), and hooked up the antenna to an antenna tuner and then to the EFHW in my back yard.

I answered an FT8 CQ call and successfully completed the FT8 exchange. The software does the automatic sequencing of the different messages, so it is very straight forward to use. With this first contact, I verified that the iPhone/adapter/QMX setup does work.

The Real Test

The next attempt was while camping at Hamlin Beach State Park (US-2068). I set up everything just like at home, but because I was planning on being on the air for a while. I also hooked up the cable to charge my phone while I was operating.

I was able to receive stations, but could not transmit. What made the troubleshooting more complex is that during setup, I created some sparks (that is why I do not like the barrel connector for power). I was pretty sure that the QMX was not involved, but not being able to transmit kind of suggested that I killed the finals. So I put everything away and used my KX2 instead.

Back home, I did some troubleshooting and hooked up a straight key to the QMX and it worked: I was able to finish a few CW QSOS without a problem, so the finals were definitely OK. I then set up the system again for FT8, and sure enough, I was able to make a contact. Because it was a quick test, I did not bother to use the power cable for the phone. By now, most of you probably know what the culprit was, but because I did not spell things out like this, I was still in the dark.

Success At Last

Fast forward a few more days… We went back to Hamlin Beach State Park – but this time to the picnic area – and I set up my station again. And sure enough, once everything was set up, the QMX did not transmit. This is when I took a step back and reviewed everything I had done so far, and slowly I came to the realization that when I provide power through the adapter to the phone, the QMX would not transmit.

I was able to finish my FT8 activation with my pocket sized digital station. I did run into one problem however: iFTx allows to automatically determine one’s grid square – which of course is important for FT8. When I enabled that, it correctly put me into FT13 at first, but a few QSOs later it switched me to JJ00aa – I reported this as a bug to the developer.

Using iFTx with the iPhone

The connection from the phone to the QMX is audio only. iOS does not allow an application to open a serial port connection (unlike Android). This means that the QMX will not receive any frequency information from the phone, and also no PTT signal. For this setup to work, the operator has to make sure that the QMX is tuned to the correct frequency that the correct band is selected in iFTx, and that the QMX is set to VOX mode (this is in the Digi Interface menu).

When configuring iFTx, it is possible to select a “Special Interest Activity” like POTA. This is then added to the CQ call as in “CQ POTA K5KHK FN13”.

As I’ve mentioned before, the application will automatically sequence the correct messages when a station answers the call.
Once the QSO is completed, it will be logged to the iFTx internal log, which can be exported via the usual “send to” methods available in iOS (e.g. email the log, save as a file, …).

When exporting the log, there is a choice of exporting everything, or only the new QSOs since the last export. This will create an ADIF file, which can be submitted to the POTA program, or imported into any other logging program.

At the end, I was successful in building a “pocket sized” digital station based on the QMX, I just need a fully charged phone and cannot depend on charging it while operating.

Click here to check out more articles from Karl on his blog!

Field Reports, News, Portable, POTA, QRP, Videos

Do I make videos of all of my field activations?

7 Comments

This past weekend, I attended the WCARS hamfest in Waynesville, North Carolina. My buddy Vlado (N3CZ) and I purchased a few indoor tables to sell some gear we no longer needed.

I also gave a short presentation about the ins and outs of going QRP. It was a lot of fun!

When I go to a hamfest, I spend a great deal of time salivating over the vintage stuff. This R-388 would look brilliant in my radio room! Wish I had the space.

I was surprised at how many people introduced themselves as readers, subscribers, and supporters. It blew my mind since this is a smaller regional hamfest—not Hamvention or Huntsville!

One reader asked a question I get a lot: “Do you film all of your activations?“

The answer is no, but I probably film 80% or more. I enjoy making activation videos. When I do a real-time video, I feel like you’re there with me, and I really enjoy that.

Even though I’ve simplified my camera gear, filming still adds time to my activations. I have to plan the setup so you can easily follow along as I log, and I need to ensure the audio is acceptable. When I’m really pressed for time, I skip making a video.

In addition, each activation video and field report takes me at least four hours to prepare. Unlike most YouTubers, the video editing time is minimal, but the field report takes time: preparing the text, photos, layout, links, etc. It’s a labor of love, though, and I enjoy the process.

Speaking of offline activations…

Lunch with Vlado isn’t complete without Baklava.

After the hamfest, Vlado and I enjoyed lunch (at this brilliant Italian restaurant), then I drove to Sylva to pick up Hazel (who had been staying with my brother-in-law).

On the way home, I passed the Blue Ridge Parkway, so I did an impromptu POTA activation at the Balsam Gap Overlook (which is overgrown and not much of an overlook anymore, but still a great spot for POTA).

I decided to make a short video for YouTube answering the reader’s question.

There’s some irony in making a video stating that I don’t always make videos of activations!

Click here to watch on YouTube.

It was a fun and quick activation: ten contacts in thirteen minutes. I used my Elecraft KX2 and PackTenna 20M EFHW—always an effective combo.

Hazel enjoyed laying on the grass next to me.

All in all, a fun little activation! I was in and out of there in 22 minutes. Had I filmed this, it would have taken more than 30 minutes.

Here’s my log sheet:

Here’s the QSO Map:

Screenshot

I’ve got some great activations in the pipeline and look forward to publishing them this month!

Thank you for coming along on the journey!

Cheers & 72,
Thomas (K4SWL)