Category Archives: SOTA

Articles, Field Reports, Guest Posts, Portable, QRP, SOTA

DM1TBE Field Report: Shivering with 18 WPM on the ruins of the medieval Hohenstaufen Castle

7 Comments

Many thanks to Thomas (DM1TBE) for the following field report:

Shivering with 18 WPM on the ruins of the medieval Hohenstaufen Castle

by Thomas (DM1TBE)

Intro

It had been two weeks since my last field activation and my bad conscience grew, so a friend and I scheduled an activation, even with expected temperatures at -2 °C / 28 °F. The choice fell on the summit Hohenstaufen (DM/BW-102).

The Hohenstaufen is one of the two SOTA summits that I can see from home in Southern Germany and one of the so-called group Drei Kaiserberge – the middle one does not qualify for SOTA, unfortunately.

A Little Bit of History

On top of the summit are still ruins from the medieval Hohenstaufen Castle. The castle was built around 1050 and used until 1525, when it was looted and burned down during the German Peasants’ War. The summit has been populated since at least the 8th century.

The castle (picture from 1470 above), was the seat of the Hohenstaufen dynasty to whom belonged several Kings and three Emperors of the Holy Roman Empire, which, at its greatest extent, included the area of Germany, Switzerland and parts of France, Austria, Italy, Czech, Belgium, Netherlands, Slovakia – or easier: almost all of Central Europe.

The history of the House of Hohenstaufen was misused by Nazi-Germany when they named the 9th SS Panzer Division Hohenstaufen.

There is not much left of the castle nowadays, but you can still spot parts of the foundations and walls.

Equipment

Due to the positive experiences during the last two activations, I decided to go with an end-fed half-wave antenna for the 30 meter band along with my Elecraft KX3, a 4Ah LiFePo4 battery, a 10 m / 33 ft fibreglass pole and the BaMaKeY TP-III (a 70 g / 2.5 oz light magnetic paddle). The paddle is too light for me to use, so I usually attach the magnetic base of the paddle to a metallic clamp on a clipboard. Although I studied computer science, I prefer pen and paper for logging. Part of the fun is the guessing of the logged call signs after an activation.

Activation

The summit is within walking distance from home, but the weather and a tight family schedule coerced me to drive the 15 minutes to our starting point. Continue reading DM1TBE Field Report: Shivering with 18 WPM on the ruins of the medieval Hohenstaufen Castle →

Articles, Field Reports, Guest Posts, News, Portable, QRP, SOTA

SOTA-Inspired License Upgrades: Thomas activates two Edinburgh summits with his Elecraft KX3/AX1 kit during business travel

6 Comments

Many thanks to Thomas (DM1TBE / M0KEU) who shares the following SOTA field report he also shared on the excellent SOTA reflector.

How two Scottish SOTA activations encouraged me to upgrade my German license

by Thomas (DM1TBE / M0KEU)

I just wanted to tell someone this story. Not sure if you want to hear it, but I will tell you anyway :wink:

During June last year, my boss asked me if I could step in for an ill colleague and visit a business partner in Frankfurt and Edinburgh. As a SOTA activator, I first checked the map and have happily spotted a summit within walking distance of the hotel in Edinburgh.

Unfortunately, there were three issues to solve:

  1. The UK does not accept my German “Klasse E” (CEPT novice/intermediate) license;
  2. operating a radio on the summit requires written permission and
  3. as the duration of the trip was planned with just 2 overnight stays, only hand luggage was possible.

At the Ham Radio in Friedrichshafen, I asked an RSGB representative if it is possible to get a British license as a German. Mark, M1MPA, explained to me how the process worked, so I started the online course provided by GM6DX. It was not too difficult, and I soon passed every mock exam. Roughly, two weeks before the trip, I passed the RSGB operated online exam and got my UK foundation license, so I could operate in Scotland as MM7TBE.

Regarding the issue with the permission to operate on the summit, I first chose to ignore and pretend being a stupid foreign tourist until I was told that it is really enforced, and my activation could be deleted. So, I asked the Ranger Service at Historic Environment Scotland for permission less than two weeks before my activation and received it just one day later with a comment that it is usually expected to ask one month in advance. Many thanks to the Ranger Service, next time I will come earlier – I promise!

The last issue was the size of the equipment.

There is no tree on top of the summit Arthur’s Seat GM/SS-272, and I had very little space left. So I went with a KX3 with an AX1 antenna and a FT2D for 2m FM.

Now the journey could begin.

On the first day, I was at a very high place in Frankfurt but unfortunately, it did not qualify for SOTA. That evening I arrived in Edinburgh.

The next day, late afternoon, the fun could start.

A colleague and I walked from the city centre to the summit Arthur’s seat. Continue reading SOTA-Inspired License Upgrades: Thomas activates two Edinburgh summits with his Elecraft KX3/AX1 kit during business travel →

Antennas, Articles, Guest Posts, News, Portable, POTA, SOTA

Skip recommends the QRPguys DS-1 portable antenna kit!

29 Comments

Many thanks to Skip (K4EAK) who shares the following guest post:

The QRPguys DS-1 Portable Antenna Kit

by Skip (K4EAK)

There have been several videos and extended comments lately about the Elecraft AX1 and AX2 antennas, both of which function remarkably well for a small, highly compromised antenna.

For those interested in other, similar designs, especially those hams who find that building the equipment is half the fun, another option to consider is the QRPguys DS-1 antenna.

The DS-1 is similar in concept and design to the AX2. It consists of a base-loading coil, a 46.5-inch collapsible whip, and a plate to attach the antenna to a small tripod. One can also purchase an add-on 40-meter coil. The can be deployed in just a couple minutes and, when collapsed, the longest portion is only 6.5” long, easily fitting in the palm of one’s hand. QRPguys recommends a 16.5′ counterpoise; I use two such wires, usually spread out at a 180-degree angle. I’ve also used it with a clamp-on mount and a car window mount.

Building the antenna is simple and took me less than an hour. After installing a BNC connector into a brass plug and inserting the plug onto a length of PEX tubing, one simply runs the supplied 22AWG wire from inside the tubing, out and around making 22 turns, and then sealing it with a length of heat shrink tubing.

There are really only two aspects of assembly that are slightly more difficult. The first is that it’s necessary to drill and tap two holes for 4-40 screws, which obviously means that (1) one needs a 4-40 tap and (2) one needs to be careful tapping the threads to assure a clean cut. The second is that the heat shrink tubing, at least as supplied in my kit, was grossly oversized, which required some finesse in getting a final product that was at least reasonably aesthetic, to say nothing of accomplishing that without dry roasting my fingertips.

Field testing of the DS-1 shows that it works surprisingly well. The SWR is well below 2.0 across almost all of the 20-meter band and where it is higher than that (the upper end of the voice portion), the KX2 internal tuner can tune it easily. As one would expect, on 40 meters the antenna has a somewhat narrower range, although the KX2 tuner has handled it on all of the frequencies I’ve tested so far (all CW). And it appears to be efficient enough.

I have used it on numerous activations and consistently get to the requisite 10 contacts within 20 minutes or so after getting spotted. After that, the number of contacts depends on the time available, but for those occasions when I have only a 30-minute window for an activation, the antenna is a convenient and practical alternative.

I keep the antenna, the tabletop tripod, and the counterpoise wires in the water bottle pocket of my pack, ready for use whenever I have a few moments for a quick activation.

73 Skip K4EAK

Click here to check out the QRPguys DS-1 antenna

Antennas, News, POTA, QRP, SOTA, Videos

Video: What are the differences between the Elecraft AX1 and AX2? Should you buy one?

15 Comments
The Elecraft AX1 paired with the KX2.

During the months of January and February 2023, I’ve given my Elecraft AX1 a thorough workout. As I mentioned in a previous post, I thought it might be fun to take the AX1 out on a good 30 days worth of activations.

Turns out, I’ve had such brief windows of opportunity to play radio recently, the AX1 and now AX2 have been valuable tools in my field kit. They are, no doubt, the quickest-to-deploy and most portable antennas in my collection.

The Elecraft AX2 paired with the KX2.

If I only have a 20 minute window to squeeze in a quick park activation, the AX1 and AX2 make a valid POTA activation–with 10 logged contacts– a reality.

I originally purchased my Elecraft AX1 in the spring of 2020 and have used it extensively since then. In January 2023, I finally caved in and purchased the most recent addition to the AX family, the mono-band AX2.

Elecraft AX1 vs. AX2

Since I’ve been publishing numerous field reports recently using the AX1 (with more to come) and since Elecraft has included both the AX1 and AX2 in their February 2023 Specials, I’ve received questions from readers asking:

  1. “Should I buy an AX1 or AX2–?”
  2. and “If so, which one should I buy? What are the differences?”

At first, I simply pointed readers to the concise comparison guide that Elecraft publishes on their website (linked below).

I realize, though, that there are characteristics of each antenna that you might only discover after actually using them in the field.

I decided to make am unedited video–based on a few notes–not only describing the differences and similarities of the AX1 and AX2, but also if either would potentially benefit you as a field operator or traveler.

One quick note about resonance…

One point I touch on in the video is that both the AX1 and AX2 antennas are designed to be mostly resonant on 20 meters.

Small verticals like the AX1 and AX2, that use coils to electrically “lengthen” the antenna, have a higher Q than, say, a large aperture quarter or half wave antenna. In practical terms, this means that the window of resonance is narrow and more fickle than, for example, an end-fed half-wave.

A lot of factors can affect the SWR on higher-Q antennas like the AX1/AX2 including:

  • the type of terrain,
  • height off the ground,
  • length of counterpoise,
  • configuration of counterpoise,
  • and, most notably, the operator’s own body capacitance.

You may find that the AX2, for example, is natively resonant on 20 meters at one location, but isn’t at another location. This is quite normal. It’s also the reason why Elecraft states that both antennas are designed to be used with an ATU.

If you are pairing the AX1 or AX2 with a radio that doesn’t have an ATU (or you can’t use an external one), then you might consider making a simple capacity hat. Check out this field report and video where I paired the AX1 with the IC-705 and used a capacity hat to sort out the SWR.

Video

As with all of my videos, this one is unedited and commercial-free. If you’d like to skip through the video to the parts you might find most relevant, simply hover your mouse over the YouTube time line and click on the chapter indicated:

Click here to view on YouTube.

Another note here: I have no affiliation with Elecraft, but pushed this article and video to the front of the line to help those who are consider taking advantage of Elecraft’s  AX1/AX2 February 2023 Package Deals.

I hope you find the video helpful. I’ll try to answer any other questions you might have in the comments of this post.

Resources

Thank you

I hope you enjoyed this comparison video.

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.

Cheers & 72,

Thomas (K4SWL)

Antennas, News, Portable, POTA, SOTA

“On All Bands” Three-Part Field Antenna Series

3 Comments

Last year, DX Engineering asked if I would consider being a guest contributor on their new blog, On All Bands.

I’m a big fan of DX Engineering, so happily accepted.

My first contribution turned into a three-part series on choosing the right antenna for field radio activities.  I put quite a bit of time in it and enjoyed the process!

You can check out this series and any of my future contributions, by clicking here.

DX Engineering has a number of contributors and I’ve enjoyed reading through the site archives. Click here to check out the On All Bands home page.

Antennas, Field Reports, Morse Code, News, Portable, POTA, QRP, SOTA

Testing a new Tufteln knee board and antenna during this beautiful SOTA activation on Mount Mitchell

13 Comments

On the morning of November 4th, I woke up with one thought on my mind: “I need to activate Mount Mitchell before it’s too late!”

It’s not like Mount Mitchell was going to disappear, but I knew I was already on borrowed time since the long section of the Blue Ridge Parkway I use to drive to Mount Mitchell from Asheville typically closes in the early part of November for weeks at a time. The park itself will close to guests too–in fact, last year, it closed its gates as I drove out of the park! There are often other roads open to Mitchell in the winter, but they’re very much out of the way for me and frankly, weather can shift and the park close at the drop of a hat.

As the crow flies, Mount Mitchell is actually very close to my QTH. If I wanted, I could hike there directly from my home. I’ve yet to do this, however, because with the 3,000′ elevation change and the anything-but-direct trails that skirt the Asheville watershed, I’d need a full day or more to hike it one way. I will for sure do this sometime, but only when I can pack appropriately and reserve a campsite.

Morning drive

As soon as I surfaced that morning, I check the weather map. I noticed that the temp at Mount Mitchell was actually slightly higher than at my QTH. I looked out the kitchen window and could see fog in the valley. This meant one thing: inversion!

When we have inversion, the cold air is pushed down into the valley and warmer air can be found at higher elevations. The flip opposite of what you’d typically expect.

I ate a quick bite, grabbed come coffee, and hit the road.

As I drove past Warren Wilson College’s farm, it was absolutely gorgeous. I had to stop and take a photo or two [click images to enlarge].

The drive up to Mount Mitchell on the BRP was ideal: clear skies and quite warm!

Mount Mitchell State Park (W4C/CM-001 and K-2747)

In fact, I felt like I really struck it lucky that day. I didn’t even need a heavy jacket or gloves. Continue reading Testing a new Tufteln knee board and antenna during this beautiful SOTA activation on Mount Mitchell →

Articles, Morse Code, News, Portable, POTA, QRP, QRP Radios, Reviews, SOTA

A review of the LnR Precision Mountain Topper MTR-4B ultra-portable QRP transceiver

15 Comments

The following article originally appeared in the November  2022 issue of The Spectrum Monitor magazine:

A Review of the LnR Precision Mountain Topper MTR-4B V2

by Thomas (K4SWL)

I confess, there is something that I’ve come to believe is almost a rite of passage in the SOTA (Summits On The Air) community. And, no, I’m not talking about activating an All Time New One (ATNO) summit, or completing a particularly challenging activation on a snow-capped peak.

I’m talking about owning one of the iterations of the amazing “Mountain Topper” pocket-sized QRP CW transceivers designed by Steve Weber (KD1JV).

This little radio first caught my attention at a Four Days In May (FDIM) QRP conference over a decade ago: a ham friend in the SOTA community proudly showed me a very early version of the Mountain Topper that he built from a kit. The first thing that struck me was how impossibly small and extraordinarily lightweight it was. But when he showed me the 9-volt battery he used to power it––a power supply not only small, but convenient––I was mesmerized.

Over the years, the Mountain Topper has evolved.  There have been many models, ranging from two bands to five. To my knowledge, they’re no longer offered in kit form, but LnR Precision manufactures and tests these in North Carolina, and they’re better than ever in terms of features and performance.

At present, the MTR-4B V2––the second version of the four-band Mountain Topper––is the only model in production, and if you’re hoping to acquire one, due to supply chain issues (at time of publishing) there’s a rather long wait time. They retail new for $350 US, and frankly, the used ones I’ve seen posted in ham radio classifieds ads have been equal to, or even over, the listed price for a new rig.  Obviously, demand for these radios is much higher than supply.

So, how could it be that this minuscule QRP radio performs well enough to produce some serious DX from a remote summit…so well, in fact, that people are willing to wait in line for one?

Magic or method?

As any CW operator will tell you, the magic is in the mode. CW is such an efficacious mode that it cuts through the ether like a knife, even when conditions are less than favorable.

Obviously, pint-size radios like the Mountain Topper are QRP––low power––so designing them around such a simple mode is a very smart choice. CW transceivers are much less complex than a similar SSB transceiver, thus have less components, less mass, and are in general more affordable (when compared to those with similar receiver performance).

My comprehensive MTR-4B field kit (the MTR-4B is in the mesh pocket).

In addition, the Mountain Topper is designed with the field activator in mind:  specifically, SOTA activators, but of course, POTA (Parks On The Air), WWFF (World Wide Flora and Fauna), IOTA (Islands On The Air), or any other popular “-OTA” field activity. As a field activator in one of these programs, you are the DX. This means chasers and hunters are actively seeking your signal, and thus you are not competing with blowtorch stations to punch through a pileup.

I can also assure you that standing on a tall summit also gives you a brilliant starting point for your QRP signal. Some of the best DX I’ve ever worked has been from a summit.

So, for the average CW SOTA activator, QRP is preferred because QRO simply isn’t necessary––indeed,  in my opinion it’s a bit of an overkill. At least that’s been my experience now with my few hundred SOTA, POTA, NPOTA, SOTA, and even one Lighthouse On The Air activations.

So this brings us back to the wee Mountain Topper series and the model being reviewed here in the pages of TSM: The Mountain Topper MTR-4B. Continue reading A review of the LnR Precision Mountain Topper MTR-4B ultra-portable QRP transceiver →

Field Reports, Morse Code, News, Portable, POTA, QRP, SOTA, Videos

Field Report: QRP SOTA and POTA on Big Cedar and Black Mountain in North Georgia

5 Comments

As I mentioned in a previous post, I attended the W4G SOTA Fall Campout in October and it was nothing short of amazing.

It was so great to spend an extended weekend camping, hiking, and hopping on the air with other SOTA activators.

I especially enjoyed getting to know Joshua (KO4AWH)–the fellow behind Tufteln products— over that weekend. He needed a campsite and since my buddy Monty had to pull out of the trip due family activities, I was happy to share the tent site with him.  It actually worked out quite well since we could then pair up and car pool to our SOTA and POTA activations.

What follows is a field report for two SOTA activations Joshua and I did back-to-back on Friday, October 14, 2022.

The trail head for both of these summits was only a few miles from our campsite at Lake Winfield Scott.

Gear:

Note that I used the same gear during both SOTA activations all packed in my Spec-Ops Brand SOTA backpack.

Black Mountain and Big Cedar essentially share the same trailhead at the Woody Gap Recreational Area parking lot on Highway 60.

We were on site early enough to grab a parking space. Keep in mind that it was Friday during leaf season, so there were quite a few hikers on the trails that day! In fact, by midday, the parking lot was overflowing with cars.

Almost by flip of coin, we decided to hit Big Cedar Mountain first. Turns out, Joshua had actually hiked to this summit in the past and even met a SOTA activator en route (and I believe this might have been his inspiration to try Summits On The Air!).

Big Cedar Mountain (W4G/NG-023)

The 1.1 mile hike to the summit of Big Cedar Mountain was brilliant and the views were absolutely stunning. Continue reading Field Report: QRP SOTA and POTA on Big Cedar and Black Mountain in North Georgia →

Accessories, Morse Code, News, POTA, Reviews, SOTA

N0SA SP4 Mini Morse Magnetic Paddles Review

28 Comments

You might recall my previous announcement about the new  N0SA SP4 POTA/SOTA Mini Morse Code Magnetic Paddle from CW Morse.

The first production run of these paddles sold out very quickly, but I just received the following message from CW Morse about the new paddles:

We’ve finally gotten caught up and will be shipping out Monday & Tuesday [Nov 21/22]! Also have a few more in stock. Making another batch as well.

CW Morse sent me a set of these paddles to evaluate at no charge to me (keep in mind, they’re both a sponsor and affiliate of QRPer.com) and I got a chance to use them Thursday afternoon.

In short?

I love these paddles!

In fact, I think these may become my preferred compact paddles.

I like the size of the finger pieces/pads.  They’re large for such a tiny paddle, which I believe gives them a solid feel while keying. I prefer a larger contact surface area as opposed to thin finger pieces.

The response is very precise, too, and the action can be adjusted by a supplied Allen wrench.

I agree with a few readers who’ve already received their paddles and noted that the carbon fiber reinforced PETG material make the key grippy and very easy to hold.

The size and design is very similar to the SOTA paddle N0SA sold out of last year in a matter of a few hours.

Bonus POTA Activation!

Thursday afternoon, my daughters attended a two hour meeting not even a stone’s throw from the Blue Ridge Parkway. I had *just* taken delivery of the new N0SA paddles, so grabbed the shipping box from CW Morse, my new-to-me Elecraft K2/10 (more on that later!), and my PackTenna Random Wire antenna.

I only discovered that my daughters’ meeting was so close to the parkway about 10 minutes before leaving the QTH. This was one of those bonus activations that deserved a little happy dance, especially since I could spend a good 1.5 hours on the air–a proper luxury for this busy father!

I’ll post a full field report and activation video in a couple of weeks, but in a nutshell, 30 meters was on fire. I’d planned to work 20, 30, and 40 meters (to test the K2’s internal ATU) but 30M was so dang busy, I never had time to QSY.

I had not put the K2/10 on the air yet, so all of the settings were default and it had been a few years since I used a K2, so had to re-familiarize myself with the settings. Thirty meters was so consistently busy, I didn’t have a breather to tinker with the settings.

The new N0SA SP4 paddles worked flawlessly.

I expected nothing less from an N0SA design, but still–the feel and action is superb.

I think this paddle may become the new benchmark for where price and quality meet.

I feel like CW Morse could be charging  $112.95 instead of $82.95 for these and I would still be very pleased with that price. I’m glad they’re not, though, because sub-$100 pricing does give new CW ops an affordable quality mini paddle option.

Based on so many reader recommendations, I purchased a BaMaKeY TP-III paddle recently. It’s also a wonderful paddle, but cost me 157.25 Euro which is nearly twice the price of the SP4 paddles. While I think the TP-III paddles are brilliant (and I’ll soon post a review) I actually prefer the N0SA SP4 paddles (note that this is my own personal preference–both are amazing keys). I prefer the SP4’s larger finger pieces.

Size comparison: CW Morse CNC Machined Aluminum Paddles (left) N0SA SP4 Paddles (right)

The great thing about CW Morse is that they have the capacity to handle customer demand of the SP4 paddles–this is something N0SA couldn’t do as a one-man show. I think CW Morse also has economies of scale working in their favor and, no doubt, this is how they continue to be the market leader in terms of quality for price.

If you’ve been looking for quality mini paddles for your compact field kit or shack, look no further. These are a no-brainer. You’ll love them.

Click here to check out the new N0SA SP4 SOTA/POTA paddles at CW Morse.

Articles, News, Portable, POTA, QRP, QRP Radios, Reviews, SOTA

The enduring Yaesu FT-817 and FT-818 series transceivers

54 Comments

The following article originally appeared in the October 2022 issue of The Spectrum Monitor magazine:

The enduring Yaesu FT-817 and FT-818 series transceivers

by Thomas (K4SWL)

Last April, our family went on a camping trip at New River State Park in Ashe County, North Carolina; we had an absolutely brilliant time.

Naturally, as with any camping trip or extended travel, I’d put a lot of thought into choosing the portable transceiver and field kit to take along.

The great thing about camping at a state park is that I can “activate” that park via the “Parks On The Air” (POTA) or “Worldwide Flora and Fauna” (WWFF) programs pretty much anytime: early morning, late afternoon, or even in a late shift well into the night. Or, of course, all of the above.  Since my activation site is also where I’m eating and sleeping, my radio usually gets heavy use.

Before leaving on that April camping trip, I knew what radio I wanted to operate the bulk of the time: my Yaesu FT-817ND. For a lot of reasons which  I’ll delve into later, I think the FT-817ND (or its latest iteration, the FT-818ND) is an amazing QRP field radio.

Despite unstable propagation and a little campground QRM that moved in over the weekend––no doubt from a neighboring RV, chock full of noisy switching power supplies––I found the FT-817ND activation to be a most enjoyable experience. I posted a few field reports and activation videos from my New River activations on QRPer.com. 

The thing is, each time I publish a field report using the FT-817ND, I receive a string of questions from subscribers and readers. Questions such as…

  • Should I buy a new FT-818 or a used FT-817?
  • Why do you like the FT-817ND so much?
  • What’s the difference between the 817 and 818?
  • How does the FT-817/818 compare with _____ radio?

Most queries, however, are a version of this comment from reader David:

“We have such a wide array of QRP rigs available to us these days, I’m curious what brings you back to the Yaesu for activations? It’s bigger than our more modern radios, with no ATU and more current draw.   I’m just wondering if there is something that you find it does particularly well, or if it’s just ‘because I like to use it,’ which to me is an entirely valid reason, too! My 897 served me well, as does my 891; I’ve had Yaesu handhelds forever, so I’m certainly a fan. I don’t own an 817/8 but they have a devoted following so I just wanted to get your perspective on it.”

Or as another subscriber distilled the question:

“Why choose a legacy design like the 817/818 when newer QRP transceivers have better overall field specs and features?”

Of course, these types of questions are simple enough when it comes to asking, but when it comes to answering, much more complex.

Of course, as I said in my recent TSM article about choosing a field radio, one’s love of a particular radio is by definition quite subjective, and this certainly applies to my response…we all have our own personal preferences.  But behind these preferences are objective facts, such as product’s unique features, specifications, and form factor; let’s take a look at these.

Continue reading The enduring Yaesu FT-817 and FT-818 series transceivers →