Category Archives: Morse Code

Antennas, Field Reports, Morse Code, News, Portable, POTA, Product Announcements, QRP

Testing the new Chameleon Tactical Delta Loop (CHA TDL) antenna

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Chameleon Antenna has sent me a number of their antenna systems to evaluate in the field over the past few months at no cost to me. I appreciate not only the opportunity to test these antennas, but to provide the company with my frank feedback.

As I’ve mentioned previously, Chameleon antennas are military grade and build here in the US (check out Josh’s tour of their factory).  You pay a premium price–compared to imported options–but their gear is built for performance, easy deployment, and longevity.

What has impressed me most about Chameleon gear is how flexible and modular it is. Their antenna systems are adaptable to almost any situation and always built around the idea of emergency communications.

Recently, Chameleon sent me their new CHA TDL or Tactical Delta Loop antenna. This vertical loop antenna has been designed to be portable, and tunable from 3.5 to 54.0 MHz (80-6M), but, as Chameleon points out,  “is most effective on the bands from 10.1 to 54.0 MHz (30-6M). ”

TDL deployment

If I’m being perfectly honest, I wasn’t sure what to expect this antenna to look like–in terms of size–once deployed, so I set it up in the front yard prior to taking it to the field.

Set up couldn’t have been more simple: attach the 17′ telescoping whips to the stainless steel spike (with one whip attached to the Hybrid Micro), extend the whip sections, then attach the loop wire to connect the tips of both whips.

It might have taken me four minutes to set up the TDL on the first go.

This antenna needs a little space  for sure: this isn’t one you could easily deploy in a dense forest, but it has a very flat profile vertically. I can’t think of a single park I’ve activated that couldn’t accommodate the CHA TDL.

I like to try to give gear a fair chance when I do evaluations and thought I’d wait until propagation was at least stable before taking the TDL to the field and making a real-time, real-life video (as I used it for the first time). But, frankly, I’m way to impatient to wait for the sun to play fair! Trial by fire…

Lake Norman State Park (K-2740)

On Monday (March 15, 2021) I packed up the CHA TDL and headed to Lake Norman; one of my favorite parks to play radio.

Gear:

Propagation left much to be desired that afternoon, but the weather was perfect.

I decided to pair the CHA TDL with my Icom IC-705. Since the CHA TDL requires an ATU, I connected the mAT-705 Plus.

NVIS on the low bands

I had no idea what to expect from the CHA TDL in terms of performance, but Chameleon notes that it provides Near-Vertical Incidence Skywave (NVIS) propagation on 40 and 80 meters. NVIS antennas are very popular for the military and for emergency communications since the propagation footprint is much closer to home than it might normally be.

NVIS is also a brilliant option for park and summit activators, especially if they’re activating in an area with a high density of park/summit chasers. For example, if you live and activate sites in the state of Maryland, employing a NVIS antenna might make your site more accessible to the DC metro area, Pennsylvania, Virginia, New York, Delaware, and New Jersey–regions that might otherwise be in the skip zone of your 40 meter signal.

On the air

Operating five watts CW, I started calling CQ POTA on 20 meters and snagged four stations in about seven minutes.

I was very pleased to work a station in California and one in Montana with five watts. (Though I need to check, this might have been my first MT station logged from a park.)

Next, I moved to 40 meters and was very curious if the TDL would provide me with proper NVIS propagation.

It did! One litmus test for me is when I work stations in Tennessee on 40 meters. Typically, I only log TN stations when on 80 meters or when I’ve configured one of my wire antennas for NVIS coverage.

Here are my logs from this 28 minute activation:

Here’s a QSOmap of the activation–the delineation between my four 20 meter contacts and eight 40 meter contacts is pretty evident:

Video

Here’s my real-time, real-life video of the entire activation which also shows how the CHA TDL easily fit in among trees:

In a future video, I’ll show how I deploy the CHA TDL.

Unfortunately, I left my tripod at home, so apologies for the viewing angle as I operated the IC-705.

Summary

This first test of the CHA TDL really couldn’t have gone better.

I was able to easily deploy it on sloping ground, among trees, in a state park, and snag both locals and QRP DX within a brief window of time on the air.  All this, while our local star tried its best to interfere.

In terms of construction, the TDL is what I would expect from Chameleon: military grade.

For park activators and Emcomm purposes, the CHA TDL makes for a convenient, portable NVIS antenna on 40 and 80 meters.

While I have lighter, smaller footprint antenna options for SOTA, I must admit I’m very curious how it might perform on 20 and 17 meters from the summit of a mountain. The idea of being able to rotate the antenna and change the propagation footprint is very appealing. I’ll save this experiment for a summit that doesn’t require hours of hiking, though, and one where I know I can jab the stainless steel spike in the ground (i.e. not on top of a rocky mountain).

Any negatives? When I first deployed the TDL at home, we were having 30+ MPH wind gusts. When the gusts shifted, it did move the antenna. This could be remedied pretty easily by using a bit of fishing line filament to tie off one side of the loop. With that said, I’m not sure I’d configure the TDL as a loop if I expected strong winds. Also, as I mentioned earlier, this might not be the best antenna to pack if you plan to include a multi-hour hike in your activation.

And herein lies the brilliant thing about Chameleon Antennas: If I packed in the CHA TDL and found that winds were strong on site, I would simply configure it as a vertical instead of a loop!

The CHA MPAS Lite vertical

The CHA TDL can easily be configured as a CHA MPAS Lite portable vertical: all it’s missing is a counterpoise wire which you can buy separately from Chameleon or, better yet,  just use some spare wire you have on hand!

Or, you could configure it as a random wire antenna by directly connecting a length of wire to the Hybrid Micro transformer.

That’s the thing about Chameleon HF Antennas: they can be configured so many different ways.

If you’re interested in the CHA TDL, I’d strongly encourage you to read though the user manual: it’s chock full of info and ideas. Click here to download as a PDF.

Next time I take the CHA TDL out, I think it’ll be to a summit where I’d like to see how it might perform on the higher bands with the ground sloping away from the antenna site.

Click here to check out the CHA TDL at Chameleon Antenna ($355 US shipped). 

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

SOTA Field Report: Activating Lane Pinnacle with the Elecraft KX2 and CHA MPAS Lite

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I’ll let you in on a little secret. Don’t tell anyone, but I held off making my first Summits On The Air (SOTA) activation  until the stars aligned and I could activate one particular summit completely on foot from my QTH.

Last Thursday (February 25, 2021), my daughter and I hiked to Lane Pinnacle (W4C/CM-018) and performed my first Summits On The Air (SOTA) activation.

Why did I wait so long?

We live in the mountains of western North Carolina where (obviously) there are numerous SOTA summits to activate.

But I wanted Lane Pinnacle to be the first.

Why? Well, it’s the one summit I can hike to directly from my house with my daughter Geneva (K4TLI) and enjoy a proper father/daughter day hike.

I had planned to do this hike last year, but I injured my ankle and let’s just say that the hike to Pinnacle isn’t a beginner’s run.  I knew my ankle would need to properly heal before the journey.

This is also more of a late fall to very early spring hike due to the amount of thick foliage we knew we would have to mitigate. It’s so much easier to keep your bearings when there are no leaves on the trees nor on the green briar!

Last Thursday, I felt confident that my ankle was up to the task. We had a break in the weather as well with moderate temps and lots of sunshine (this, after several days of rain). We knew things could be muddy and slippery, but we also knew that with my busy schedule this might be our last chance to hit the summit before the mountains green up.

So we packed a lunch, plenty of water, radio gear, and (of course) emergency/first-aid kits while trying to keep our backpacks as light as possible.

Hitting the trail!

The first part of the hike requires trailblazing to a ridge line. The distance is short, but the ascent is steep (about 800 feet).  We hike this portion regularly, so knew how to pick our path and avoid the steeper, slippery bits.

K4TLI lead the way!

On the ridge line, we intersected an established single track trail and enjoyed the hike across a couple of smaller summits until we intersected the Blue Ridge Parkway.

If I’m being honest, I had some serious concerns that the trailhead to Lane Pinnacle would be closed. This portion of Blue Ridge Parkway is currently closed to motor vehicles (for the winter season) and I had noticed a number of “trail closed” signs on other portions of the parkway.

Guessing this may be a type of shelf fungus?

If the trail was closed, I planned to simply activate the parkway and Pisgah National Forest for the POTA program. I never hike on trails that have been closed by the park service because I like to obey the rules and I certainly don’t want to paint SOTA activators in a bad light.

When we crossed the parkway, we were incredibly pleased to see that the trailhead was open.

The ascent from the parkway to Lane Pinnacle is about 1,000 feet (305 meters) of elevation gain over a pretty short distance. The trail we were taking–turns out–was primitive. It basically lead us straight up the slope (no switch backs following lines of elevation, for example) and simply fizzled out about one third of the way up.  We could tell it isn’t traveled often at all (although we did find a massive fresh bear track in the mud on the trail!).

Obligatory SOTA report “foot in snow” photo. 🙂

I bushwhacked our way to the top–at times, the slope was about 45 degrees and slippery, but we easily found our way to the summit where our goat path intersected the Mountains To Sea trail.

We found an amazing overlook and took in views of the Bee Tree Reservoir as we ate our lunches.

Geneva grabbed her dual-band HT and made the first summit contact with our friend, Vlado (N3CZ) on 2 meters FM.

On the Air

I knew there would be short trees on the summit of Lane Pinnacle, but I also knew that I wanted to get on the air as soon as possible to allow extra time for our hike home.

I did pack a super compact wire antenna, but opted instead for the Chameleon CHA MPAS Lite vertical. I paired it with my Elecraft KX2.

Gear:

The great thing about the CHA MPAS Lite is how quick it is to deploy–it might have taken me all of three minutes.

Since it was noon, I decided to start on the 20 meter band. I found a clear frequency, started calling “CQ SOTA” with the KX2 memory keyer, and spotted myself to the SOTA network via the excellent SOTA Goat app on my phone.

I had also scheduled my activation on the POTA website in advance because Lane Pinnacle is in Pisgah National Forest (K-4510). My buddies Mike (K8RAT) and Eric (WD8RIF) were also helping to spot me in the unlikely event I wouldn’t have cell phone service on the summit.

Within 20 seconds of submitting the spot to the SOTA network I had a CW pileup.

In all of my hundreds of field activations, I can’t think of a single time that I generated a CW pileup on 20 meters in such short order with five watts and a vertical.

The first station I logged was N1AIA in Maine. The second station was F4WBN in France.  The race was on!

It took every bit of CW skill I had to pull apart the stations on 20 meters. It was so much fun!

I eventually worked Spain and all of the west coast states (WA, OR, and CA) and numerous stations throughout the Rockies and Midwest.

I then moved to 40 meters where I worked stations in the Mid-Atlantic, Ohio Valley, and in the Southeast.

In the end, I had to keep my total time on the air short because I wanted to take my time finding a path from the summit back down to the Blue Ridge Parkway.

In 30 minutes I worked 30 stations. I’m not a seasoned CW operator, so this was quite the accomplishment.

Here’s a QSOmap of my contacts:

I was chuffed! What a fabulous activation to kick off my SOTA adventures.

Video

This time, I did not make a video of the actual activation. For one thing, I didn’t want to carry a folding tripod for the camera and I didn’t want to ask my daughter to film it either. I wanted to keep things as simple as possible to make the most of the airtime I had.

I did, however, make a short video before and after. You can check it out on my YouTube channel:

Hiking home

I really wish we could have stayed on the summit for an hour longer making contacts, but I knew it would be wise to allow extra time to descend Lane Pinnacle especially since I knew a front was moving through later that day.

I decided it would be easier to do my own bushwhacking back down the mountain rather than try to retrace our previous steps. We took our time and I followed elevation lines to make it slightly less steep. Since I took a more south westerly descent, when we reached the parkway, we had to hike north to reach the original trailhead.

The rest of the hike was totally uneventful and incredibly fun. The weather held and we took in the views, the wildlife, and invaluable father/daughter time.

That was the first strenuous hike I had done in months due to my ankle, so let’s just say I was feeling “spent” after our 6.5 hour adventure taking in 2,000 feet (610 meters) of elevation to the summit.

I knew it was bad when I even dreaded walking upstairs to take a shower.  I think I remember telling my wife, “I’m never building a house with stairs again!”

More SOTA!

Now  that I’ve got Lane Pinnacle in the books, I’m ready to start hitting the summits! I’ve got a lot of pent up SOTA energy!

My goal is to activate a total of ten this year. That may sound like a modest number, but since at this point I’m less interested in “drive-up” summits, it’s more difficult to fit SOTA summits into my schedule than, say, typical POTA/WWFF parks.

In fact, I’ve already plotted my next SOTA activation and hope to do it within the next couple of weeks. It’s also a meaningful (to me) summit.

How about you?

Are you a SOTA activator or are you planning your first SOTA activation soon? Please comment!

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

POTA Field Report: Pairing the Icom IC-705 with the Elecraft AX1 pocket antenna

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I think I’ve said before that I don’t like doing things the easy way. At least, I’m coming to that conclusion.

This Saturday (Jan 30, 2021), I had a small window of opportunity to perform a Parks On The Air (POTA) activation.  My park options were limited because I needed to stay near my home and a store where I was scheduled to do a curbside pickup.

The only viable option–since time was a factor–was my reliable quick hit park.

The Blue Ridge Parkway (K-3378)

I plotted a quick trip to the Blue Ridge Parkway Folk Art Center which is centrally-located and, this time of year, there are few visitors.

But what radio take? It had been a couple of weeks since I used the IC-705 in the field, so I decided to take it and rely only on its supplied BP-272 battery pack.

My buddy Mike (K8RAT) had warned me only a few minutes before my departure that propagation was pretty much in the dumps. I’d also read numerous posts from QRPers trying to participate in the Winter Field Day event and finding conditions quite challenging.

Saturday was the sort of day that I should’ve deployed a resonant wire antenna and made the most of my meager five watts thus collect my required 10 contacts in short order.

And that’s exactly what I didn’t do.

You see, a really bad idea popped into my head that morning: I had a hankering to pair the IC-705 with my Elecraft AX1 super compact vertical antenna.

This made absolutely no sense.

I tried to get the idea out of my head, but the idea won. I suppose, at the end of the day, I’m not about taking the easy path (and I’m obviously a glutton for punishment).

I was also very curious if the mAT-705 Plus external ATU could tune the AX1 on 40 meters. More on that later…

Gear:

I arrived on site a few minutes before noon. Setup was fast–that’s the big positive about using the AX1.

Normally, I deploy the AX1 antenna with my KX2 or KX3 and simply attach it to the BNC connector on the side of the transceiver. The AX1 Bipod gives the antenna acceptable stability during operation.

The IC-705 also has a side-mounted BNC connector, but it’s much higher than that of the KX3 or KX2. I’m not entirely sure I could manipulate the Bipod legs to support the antenna without modification.

That and the AX1 needs an ATU to match 40 meters (where I planned to spend most of the activation). Since the IC-705 doesn’t have an internal ATU, mounting it to the side of the transceiver really wasn’t an option.

I employed my AX1 tripod mount for the first time. On the way out the door, I grabbed an old (heavy) tripod my father-in-law gave me some time ago and knew it would easily accommodate the super lightweight AX1.

On The Air

I first tried using the Mat-Tuner mAT-705 Plus ATU to tune the AX1 on 40 meters.

No go.

I tried both the phone and CW portions of the 40 meter band, but the mAT-705 Plus simply couldn’t find a match. SWR was north of 7:1 – 9:1.

Instead of grabbing the Chameleon MPAS Lite or 2.0 from the car, I decided instead to see if the Elecraft T1 ATU could tune 40 meters.

It did.

In short, I logged my ten contacts to have a valid activation, but it was slow-going. All but two of my contacts were on 40 meters CW. The last two logged were on 20 meters CW.

It was a challenge, but I really enjoyed it! And, frankly, considering the propagation, 5 watts of power only using the IC-705 battery pack, and the inherent inefficiencies using a loaded compact vertical antenna and ATU? I was impressed.

Here’s a QSOmap of my 10 contacts:

I bet my effective radiated power was closer to 2-3 watts.

Typically, the AX1 antenna acts almost like an NVIS antenna on 40 meters, but Saturday it favored Mid-Atlantic and the states of IN, OH, and PA. Normally, I would expect more of a showing from the states surrounding North Carolina.

My last two contacts on 20 meters were with KE5XV in Texas and KB0VXN in Minnesota. Not a bad hop!

It took longer to collect my ten contacts than I had hoped and I ran nearly 25 minutes late to my curbside appointment. I’m a punctual guy, but there was no way I was leaving without my ten! 🙂

Here’s a video of the entire activation. Hint: it’s the perfect remedy for insomnia:

Next time I try to pair the IC-705 with the AX1 antenna, I think I’ll try adding a couple more ground radials and see if the mAT-705 Plus can more easily find a match.

One thing I know for sure: the T1 is a brilliant little ATU. While the mAT-705 Plus was never designed to do this sort of match, it’s comforting to know the T1 can.

I’m very curious if anyone else has paired the Elecraft AX1 with the Icom IC-705 or other QRP transceivers. If so, what was your experience? Please comment!

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

POTA Field Report: Three watts, cold winds, and how *not* to calculate antenna length

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Last week, I activated Pisgah Game Land and Pisgah National Forest (K-6937 & K-4510)–things didn’t exactly go according to plan.  I still achieved a valid activations–meaning, I logged ten contacts–but I cut my antenna too short.

I this previous post, I describe my mistake and the lesson learned that day.

In short: I cut my wire antenna too short and my KX1 and KX2 ATUs couldn’t find an acceptable impedance match on the 40 meter band. This pretty much forced me to make do with 30 meters and above unless I modified or switched antennas.

The 40 meter band tends to be my most productive band, particularly on days like last Saturday when I’m operating in the latter part of the afternoon.

Maybe it was stubbornness, but I was determined to make a valid activation with that four-feet-too-short antenna.

Gear:

I first hopped on the air with my Elecraft KX1 (above) and logged a few contacts on 30 meters. I then tried 20 meters, but the band was dead.

Eventually, I pulled the Elecraft KX2 out of the bag with the hope it might actually find a match on 40 meters, but as I said in my previous post, that darn physics stuff got in the way.

That’s okay, though. Although the sun was starting to set and I didn’t want to pack up in the dark, I took my time and eventually logged ten contacts for a valid activation. I actually enjoyed the challenge.

I complain about my wire antenna, but in the end, it made the most of my three watts by snagging stations from New Hampshire, Ontario, Illinois, Arkansas and several states in between.

Against my better judgement, I made a video of this activation. As with all of my videos, they’re real-time, real-life, and have no edits. (They also have no ads.)

A few readers and subscribers had asked me to include the odd video where I actually do a full station set up including the installation of a wire antenna–that’s what you’ll see in this video:

At the end of the day, this was still an incredibly fun activation.

This was the first time I’ve ever completed a valid activation only using the 30 meter band.

Next time, though, you’d better believe I’ll cut my antenna to be the ideal length for 40 meters and above!

How long?

If you use a similar antenna with your KX1, KX2, KX3, or other transceiver, I’m curious what lengths you find work best for 40 meters an above. Bonus points for 80 meters. Please comment!

Morse Code, News, Portable, POTA, QRP

The magic of low-power amateur radio never dies

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I’ll keep this post short and sweet because I plan to write up a full field report with video sometime next week.

Tuesday (December 29, 2020), I fit in an impromptu Parks On The Air (POTA) activation in the afternoon. The station was very modest: basically, my Elecraft KX3 paired with the super compact Elecraft AX1 antenna.

Here’s what I did with 10 watts and a wee telescoping whip during mediocre propagation:

I got a huge thrill out of this.

Honestly, this hobby never gets old and I honestly believe there’s magic in QRP!

Here’s wishing everyone a safe, healthy and happy New Year!

 

Field Reports, Morse Code, News, Portable, QRP, QRP Radios

Keith is impressed with the Elecraft K1’s selectivity

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Many thanks to Keith (GW4OKT) who recently contacted me, noting that his took his Elecraft K1 to Llyn Brenig (Lake Brenig) in North Wales last weekend, and was impressed with its performance.

His outing coincided with the CQ Worldwide CW contest–a true test of any radio as this is one of the most RF-dense environments you’ll encounter on the CW portions of the HF bands.

Many lesser radios simply fall apart in contest environments like the CQWW.

Not the Elecraft K1, though! Keith noted that he was operating on 20 meters with his GWhip antenna on the roof of his car.

He made the following video:

Wow! I owned the K1 for a number of years and was incredibly impressed with its receiver although I can’t remember if I ever used it in a contest. It’s a brilliant field radio and sports a bullet-proof front end.

I should add, Keith, that I’m not the least bit envious of your Caterham Seven 310 SV. Not a bit. Not me.  🙂

Anyone else love the Elecraft K1 (or the Caterham Seven 310?) Please comment!

Antennas, Field Reports, Morse Code, News, POTA, Videos

Impromptu POTA activation using the Elecraft AX1 Antenna

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A few weeks ago, I posted a report about doing my first park activation with the Elecraft AX1 super compact antenna. If anything, I felt the activation almost went *too* well using such a small antenna. I didn’t want to give others the impression this is all the antenna you’ll ever need–it’s just a brilliant compact antenna designed for convenience and accessibility. It’s a fun field companion and can be used pretty much anywhere.

Yesterday morning, I had a number of errands to run on the south side of Asheville and had not planned to do a POTA activation. While I was waiting on a curbside delivery, however, I was admiring the nice weather and thinking that I might venture out later in the day to do a Parks On The Air (POTA) activation. Part of me knew, though, that if I returned home, I’d get involved with projects and never make it back out to the field.

I always carry a transceiver and antenna in my car, so I opened the trunk and found my Elecraft KX2 transceiver field kit which included the Elecraft AX1 antenna. Technically, that’s a whole station! Why not give it a go–? I’m always up for a challenge.

Since I would be passing by the Blue Ridge Parkway on the way home, I quickly scheduled an activation on the POTA website via my phone so that the spotting system would know to grab my information from the Reverse Beacon Network (RBN) when I started calling CQ.

Blue Ridge Parkway (K-3378)

I knew this might not be an “easy” activation: I would be using a super compact field antenna that’s quite a compromise in terms of performance, propagation wasn’t exactly stellar, and I was activating a popular (hence somewhat stagnant) park on a Monday morning. Not necessarily ideal ingredients for a successful activation.

I also discovered my phone tripod in the trunk of the car, so decided to make one of my real-time, real-life, no edit videos of the entire successful or failed activation. (Hint: It turned out to be a success.)

Gear:

If you’d like to accompany me on this park activation, check out my video on YouTube:

At the end of the day, the AX1 continues to impress me. It is a compromise? Yes. Does it perform as well as a resonant wire antenna? No. Can it activate a park as well as my other antennas? Yes.

AX1 QSO Map

Click to enlarge

No doubt, part of my success with the AX1 is because I’m primarily using CW instead of SSB to complete activations. I’ve made SSB contacts with the AX1, but I’ve never completed full park activations with it yet–in truth, though, I’ve never tried.

In fact, perhaps it’s just a lucky streak, but so far the AX1 has been as effective as many of my wire antennas in terms of simply completing valid park activations in less than an hour. My signal reports aren’t as strong as they would be with, say, my EFT-MTR resonant antenna or Emcomm III Portable random wire antenna, but it’s enough to get the job done.

If nothing else, I’ll admit that the AX1 reminds me of the magic of low-power radio each time I use it. When I log stations hundreds of miles away, with such a modest station, I feel like I’ve accomplished something.

In short? It’s fun to use.

Black Friday Sale

FYI: I just received Elecraft’s latest Black Friday 2020 ad and noticed that the AX1 antenna package (which doesn’t include the 40M extension) is on sale. Click here to check it out.

Kits, Morse Code, News, Portable, QRP

Assembling the MFJ-561K Miniature Travel Iambic Paddle Kit

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MFJ Enterprises has an amazingly deep catalog of products. So deep, I often overlook items that could be quite useful in the field.

MFJ recently sent me one of their travel paddle kits to evaluate on QRPer.com–no doubt, they heard my plea for paddle recommendations some time ago.

Paddles are a funny thing: they’re basically a very simple switch, so not terribly difficult to homebrew. Yet sometimes we want to simply purchase pre-made paddles instead of building them.

I don’t personally want to invest crazy money in field paddles because there’s a reasonable chance they could get damaged in my pack or I could even leave them on the forest floor after a POTA/SOTA activation.

Plus, paddles aren’t the weak link in my CW game (ahem, yeah…you might have guessed it’s the operator–!).

The price of MFJ-561K paddles hits a sweet spot at  $25 US. I know of no other paddles made in the US that are cheaper (although I know I might stand corrected on this point).

For $25, you’re not getting Begali quality: you’re getting something that’s simple and gets the job done.

The MJF-561K is actually a simple kit that you assemble at home. It’s a novice build for sure, taking (generously) 20 minutes to assemble and requiring no kit building experience. You will need to use a soldering iron to attach the three conductor wire to your paddles–otherwise, it feels more like a mini Meccano or Erector set.

At one point early in the build, I did find myself looking for a detailed photo to determine how the shoulder washers were placed. I couldn’t find one, so I decided to take my own photos to help anyone else building these paddles in the future.

MJF-561K Assembly Photos

Click on the photos below to enlarge:

The shoulder washer fits in the hole on the inside of the paddle as you can see on the upper paddle lever. The larger washer goes on the outside of the paddle, insulating the solder lug and Kep nuts.

One bolt and Kep nut holds the back of the paddles to the base.

This image shows how the center contact is screwed in. Note that another solder lug is held in place under the paddles and is not in this photo, but shown in the photo below.
Once you’ve attached the bottom solder lug and Kep nut, position the center contact (on top) so that it floats between both paddle contacts before tightening down.
Next, you’ll need to strip the supplied three conductor cable, tin the ends, and solder them to the three solder lugs. Check your radio manual to determine which side of the paddle to solder the tip and ring wires based on which side of the paddles will send dits and dahs.

Hint: when attaching the cable tie/strain relief, position the cable tie locking point so that it faces up rather than down (to avoid that part of the cable tie interfering with rubber feet contact.
Next, attach the rubber feet to the base.
And, finally, attach the rubber pads to the paddles

On the air

The building process was super simple as you can see from the photos above. I didn’t test the paddles in advance to make sure the shoulder washers were insulating the contacts properly, nor did I test that my ring/tip placement was correct before soldering. I would suggest you do this!

Fortunately, I plugged it into the Yaesu FT-817ND and it worked perfectly!

The paddles are lightweight and the action reminds me very much of Whiterook Paddles.

Any criticisms? For the price, these are brilliant. With that said, I wish the three conductor wire was just a bit heavier gauge. The conductors are very thin and I do worry how well they’ll hold with heavy use. Of course, it’s an easy process to replace this cable with one of my own.  Also, like most lightweight backpack paddles, the thin metal sheet base needs to be held in place while operating.

I think I might attach the paddles directly to a clipboard. If I drill two holes in the paddle base, I could mount them with small bolts onto the clipboard and remove them when done. I’ll give this some thought.

For $25, the MJF-561K paddles are a no-brainer.  I see keeping a set of these for ultralight operating and perhaps even as a set of backup paddles. And, hey! They’re a great stocking stuffer idea. I would suggest MFJ consider making a single-lever version as well.

Click here to check out the MJF-561K paddles at MFJ.

Morse Code, QRP

Yaesu FT-817ND: Mechanical CW filter suggestions?

8 Comments

I mentioned in a previous post that I recently purchased a Yaesu FT-817ND package from a friend. The Yaesu had a number of upgrades including an Inrad SSB filter. Thing is, I rarely need a filter when operating phone, but desperately need one for CW since the the default filter width is quite wide.

Although I plan to purchase a SOTAbeams Laserbeam-817, I’d still like a narrow mechanical filter for the one available filter spot on the FT-817ND.

It seems the YF-122CN (300 Hz Collins Mechanical Filter) is no longer manufactured. Used prices can be quite high.

I’m curious if anyone has suggestions for alternative narrow CW filters? Please comment if you have any advice!

Field Reports, Morse Code, News, QRP

POTA Field Report: Elecraft KX1 and two wires yield 1,100 miles per watt

16 Comments

Yesterday, my family decided to make an impromptu trip to one of our favorite spots on the Blue Ridge Parkway at Richland Balsam–the highest point on the BRP.

Of course, it was a good opportunity to fit in a Parks On The Air (POTA) activation, but I had also hoped to activate Richland Balsam for Summits On The Air (SOTA) simultaneously.

It being well beyond leaf-looking season, we had hoped the BRP would be relatively quiet, but we were wrong.

Trail heads were absolutely jam-packed and overflowing with visitors and hikers. We’ve noticed a sharp hiker uptick this year in western North Carolina due in no small part to the Covid-19 pandemic. People see hiking as a safe “social-distance” activity outdoors, but ironically, hiker density on our single-track trails is just through the roof.   One spends the bulk of a hike negotiating others on the trail.

The trail head to Richland Balsam was no exception. Typically, this time of year, we’d be the only people parked at the trail head but yesterday it was nearly parked full.

Being natives of western North Carolina, we know numerous side-trails and old logging/service roads along the parkway, so we picked one of our favorites very close to Richland Balsam.

We hiked to the summit of a nearby ridge line and I set up my POTA station with the “assistance” of Hazel who always seems to know how to get entangled in my antenna wires.

“I’m a helper dog!”

Taking a break from using the Icom IC-705, I brought my recently reacquired  KX1 field radio kit.

Gear:

I carried a minimal amount of gear on this outing knowing that there would be hiking involved. Everything easily fit in my GoRuck Bullet Ruck backpack (including the large arborist throw line) with room to spare.

I took a bit of a risk on this activation: I put faith in the wire antenna lengths supplied with my new-to-me Elecraft KX1 travel kit. I did not cut these wires myself, rather, they are the lengths a previous owner cut, wound, and labeled for the kit.

With my previous KX1, I knew the ATU was pretty darn good at finding matches for 40, 30, and 20 meters on short lengths of wire, so I threw caution to the wind and didn’t pack an additional antenna option (although I could have hiked back to the car where I had the CHA MPAS Lite–but that would have cut too much time from the activation).

I didn’t use internal batteries in the KX1, rather, I opted for my Bioenno 6 aH LiFePo battery which could have easily powered the KX1 the entire day.

I deployed the antenna wire in a nearby (rather short) tree, laid the counterpoise on the ground, then tried tuning up on the 40 meter band.

No dice.

The ATU was able to achieve a 2.7:1 match, but I don’t like pushing QRP radios above a 2:1 match if I don’t have to. I felt the radiator wire was pretty short (although I’ve yet to measure it), so clipping it would only make it less resonant on 40 meters.

Instead, I moved up to the 20 meter band where I easily obtained a 1:1 match.

I started calling CQ POTA and within a couple of minutes snagged two stations–then things went quiet.

Since I was a bit pressed for time, I moved to the 30 meter band where, once again, I got a 1:1 match.

I quickly logged one more station (trusty N3XLS!) then nothing for 10 minutes.

Those minutes felt like an eternity since I really wanted to make this a quick activation. I knew, too, that propagation was fickle; my buddy Mike told me the Bz numbers had gone below negative two only an hour before the activation. I felt like being stuck on the higher bands would not be to my advantage.

Still, I moved back up to 20 meters and try calling again.

Then some radio magic happened…

Somehow, a propagation path to the north west opened up and the first op to answer my call was VE6CCA in Alberta. That was surprising! Then I worked K3KYR in New York immediately after.

It was the next operator’s call that almost made me fall off my rock: NL7V in North Pole, Alaska.

In all of my years doing QRP field activations, I’ve never had the fortune of putting a station from Alaska in the logs. Alaska is a tough catch on the best of days here in North Carolina–it’s much easier for me to work stations further away in Europe than in AK.

Of all days, I would have never anticipated it happening during this particular activation as I was using the most simple, cheap antenna possible: two thin random lengths of (likely discarded) wire.

People ask why I love radio? “Exhibit A”, friends!

After working NL7V I had a nice bunch of POTA hunters call me. I logged them as quickly as I could.

I eventually moved back to 30 meters to see if I could collect a couple more stations and easily added five more. I made one final CQ POTA call and when there was no answer, I quickly sent QRT de K4SWL and turned off the radio.

Here’s a map of my contacts from QSOmap.org:

I still can’t believe my three watts and a wire yielded a contact approximately 3,300 miles (5311 km) away as the crow flies.

This is what I love about field radio (and radio in general): although you do what you can to maximize the performance of your radio and your antenna, sometimes propagation gives you a boost when you least expect it. It’s this sense of wireless adventure and wonder that keeps me hooked!