Category Archives: Articles

QMX – From Kit to Field!

by Matt (W6CSN)

The Radio

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

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

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

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

The Build

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

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

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

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

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

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

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

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

SOTA and POTA in Japan: Ara combines travel and radio with a little help from friends

Abroad in Japan: SOTA and POTA

by Ara (N6ARA)

Getting the License

Several months ago, my wife and I were planning our first trip to Japan, and I couldn’t help but look at all the nearby SOTA summits and POTA parks and entertain the idea of activating one of them. While stunned by the sheer number of high point summits and local parks (many of which are easily accessible via Japan’s incredible public transport system), I realized one question I hadn’t asked myself yet: Can I even operate in Japan?

I recalled the concept of a reciprocal licenses from the ham test, but never really looked into it. A quick Google search yielded the JARL (the ARRL equivalent in Japan) foreign amateur radio license website, which details the process for submitting your documents to obtain the license.

However, I quickly learned that the application must be submitted at least 60 days prior to the date of operation. Problem was… I was 58 days out.

Around this time, I let my friends, Waka-san (JG0AWE), Kazuhiro (7N1FRE), and Ted (JL1SDA), know that I would be visiting Japan. They leaped into action and helped me figure out if there would be a way to obtain my reciprocal license in time, and advised me on which summits and parks would be doable with my constraints.

Thankfully, Waka-san was very generous and offered to make an appointment with Japanese government to apply for the reciprocal license on my behalf. I was absolutely stunned by this. I struggle to make appointments at the DMV office for myself, let alone for someone else!

Two weeks later, I was surprised to learn that my license had arrived. I was now JJ0XMS in Japan. This news fittingly arrived around Christmas, making it easy to remember the “XMS” part of my call. The reciprocal license I received was classified as “1AM”, meaning 1st Amateur license for mobile. This meant I could operate on all bands at power levels below 50W, which is perfect since I tend to operate QRP most of the time anyway.

It helps to have friends around the world, but please learn from my mistake, submit your JARL-96-04 application at least 60 days (plus margin) prior to your trip and obtain your license the right way. If you have any questions about the form or the process, contact Mr. Ken Yamamoto (JA1CJP) via email at [email protected] 

Band Plan

With my license sorted, the next step was to familiarize myself with the Japanese Band Plan. After careful review, I learned it is entirely possible to accidentally transmit out of band or mode if you are not careful. For example, in the US the 2m band ends at 148 MHz, but in Japan the band ends at 146 MHz. So in theory, an operator with a US radio could accidentally transmit on a forbidden frequency.

It’s also important to note that the calling frequencies are different for all bands and that some bands have dedicated emergency communications frequencies. Thankfully, the translated Japanese Band Plan covers these extensively.

Planning the Activations

I started planning my activations by setting the goal of activating at least one SOTA summit and POTA park. I figured I’d gain the experience of doing both to see how they differ from what I’m used to in the US (and writing this blog post).

For this trip, we mainly stayed with our friend in Tokyo, so I was limited to the summits and parks near the city. To start, I figured I’d take a look at the POTA map since Tokyo is a flat city (read as, no SOTA summits to be found within the city itself), so worst case, I’d only do a POTA activation.

Much to my delight, I learned that Tokyo has 146 POTA parks within the city alone… and best of all… they are accessible via Tokyo’s public transportation system! Overwhelmed with all the options, I figured the best thing to do next is to try and see which nearby parks had the most space and activation count. I figured that would improve my odds of activating without any issues.

To be honest, my main concern was putting up an antenna in a park which I’m not allowed to in, or folks approaching me to ask what I’m doing, only to run into a language barrier issue. After looking through several options, I landed on Yoyogi Park JA-1255. The park was near where I was staying, fairly large, and had almost 100 activations. 

Next was planning the SOTA activation. Since there are no SOTA summits in the city proper, it meant I would have to travel a little to get to one.

Coming from Los Angeles, one of the most car-centric cities in the world, I did not expect to find that most Tokyo residents (including my friend) don’t own a car. Renting one is an option, but I figured it’s not worth the effort. Especially since Japan drives on the left hand side of the road – which I’m not used to. That meant driving to a trailhead was out of the question for this trip. Thankfully, that wasn’t as much of a problem as I initially thought.

Looking through the SOTA map, I found several trailheads to the east of the city that are easily accessible via train/bus and short walk. Again, I looked at the activation count to get a sense of what is attainable and found Mt. Arashiyama JA/KN-032. The summit had 84 activations with a relatively easy 762ft gain across 2.25mi and the trailhead is a 15 minute walk away from the train station. The only downside was that the train ride itself was about an hour and a half away from Tokyo. But as those who do SOTA know, the commute to the trailhead is part of the journey. (I think there’s something wrong with us.)

Packing

With a game plan settled, it was time to configure the kit. One important thing to note here is that when I submitted my paperwork to apply for the license, I forgot to include the radio make/model I planned to use (required for the application process). Thankfully, Waka-san registered the ICOM IC-705, an HF/UHF/VHF all mode transceiver (which I so happen to have). This afforded me the flexibility to work a wide range of bands and maximized my odds of having a successful activation.

With the radio figured out, I thought to pair it with a portable antenna that strikes a good balance between volume/mass and performance. My hope was to cover 10/15/20m for DX and 40m for working locals, so naturally I gravitated towards my trusted K6ARK End Fed Half Wave EFHW with an added load coil, making it resonant on 10/15/20/40m. I like to use this antenna in an inverted-V configuration using a 7.2m fishing pole. Since I had one shot at each activation, I figured it would be wise to pack a back up antenna just in case something broke mid-transport, so I also decided to pack my Elecraft AX1 vertical whip antenna and T1 tuner.

For CW paddles, I couldn’t resist packing my recently acquired Ashi Paddle 45 from Mr. Haraguchi 7L4WVU in Japan. Only seemed fitting! Finally, I thought to print out copies of my US and Japanese ham radio license, and a translated note describing ham radio, SOTA, and POTA just in case someone asked what I was doing.

Packing List:

[Note: All Amazon links are affiliate and support QRPer.com at no cost to you.]

Welcome to Japan

As soon as we landed in Japan and settle in at our friend’s apartment, we couldn’t help but go out for a nice bowl of warm ramen at Ichiran. It was a cold night, I was jet lagged, and this was exactly the “reset button” my body needed to adjust to the new timezone. I slept like a log that night. Highly recommend. 

Since this was my first time in the country, I tried my best to absorb as much of the food and culture as possible. From the Yakitori, to the Tonkatsu, to all the various Japanese curries, and Onigiri, I was glad to be walking around the city to burn off all the calories I was consuming. Everything we ate tasted incredible!

One of the first orders of business was to visit Akihabara, the electronic town I had heard so much about. Walking through shops, I found every possible component imaginable. Want a transformer? There’s a small shop that has every variant you can think of. LEDs? There’s a shop with a selection that will make you see floating dots when you close your eyes. It was like living in a Digi-Key or Mouser warehouse.

Walking through streets and multi-story markets, I was constantly running into small radio shops. Some selling commercial radios, many selling various ham radios and ham radio accessories. One golden nugget I found was a shop that sells home-brew radios, one of which was a 47.1GHz Transverter! Where else are you going to find something like that for sale in a shop?!

One last stop in Akihabara was Rocket Ham Radio, one of the largest ham radio shops in Japan (think HRO in the US). I couldn’t help myself from buying a 2m/70cm whip antenna for my IC-705 for portable VHF and UHF operations while in town. Would feel wrong leaving without buying *something*!

POTA Activation and Logging

POTA activation day was finally here, and much to my delight, Mr. Haraguchi (7L4WVU) reached out to say he was available to meet me at Yoyogi Park for a joint activation. Continue reading SOTA and POTA in Japan: Ara combines travel and radio with a little help from friends

Building Positive Park Relations: Elevating Our Role as POTA Activators

Our Parks On The Air (POTA) community has experienced exponential growth since my introduction to POTA activations in 2019. Today, POTA boasts over 500,000 participants, including both hunters and activators.

Gone are the days of awkwardly explaining our hobby to park staff who were unfamiliar with amateur radio, let alone park activations. Nowadays, when I approach park staff for permission to operate, they often direct me to areas where other POTA activators have set up in the past, showcasing a growing acceptance and understanding of our community.

Goal: Positive Impact

With such a large and expanding community, we have the potential to significantly impact our park systems positively. It is crucial for POTA activators to not only leave a positive impression with park staff but also actively support and contribute to the well-being of our parks.

Why now?

This post has been sitting in my drafts folder for several months. I hesitated to publish it because of my inclination towards positivity and reluctance to dwell on the negatives.

However, recent conversations with park rangers and staff from three different sites between June and November last year prompted me to share these insights. While acknowledging that interactions with POTA activators are generally positive, all three shared some concerns and criticisms.

I was surprised, in one case, that they hadn’t banned POTA activators from their site entirely. (I detail two examples at the end of this article.)

I imagine each and every one of these park rangers has had more negative interactions with the general public, but we POTA activators and amateur radio operators are a cohesive community that they lump into one group for better or for worse.

For instance, while a rowdy family gathering might disrupt the peace in a park, it doesn’t lead to a ban on families. However, repeated negative interactions involving POTA activators could result in our exclusion from parks or even escalation to wider park networks since many individual parks are tied to state, provincial, or national park systems.

Indeed, this has already happened at National Wildlife Refuges in Virginia. Check out the following message posted to Facebook this week from John (AB0O) who is a US mapping volunteer for POTA:

Time to be a positive force!

As John states in his message above, it’s time for us to proactively become ambassadors for POTA and good stewards of our parks and public lands.

I could have easily titled this post, “Ask not what your park can do for you; ask what you can do for your park!”

Let’s delve into some simple suggestions that I personally follow. This list is not exhaustive, so I invite you to share your strategies for promoting POTA positively in the comments below.

1. Obtain permission before operating

Despite the temptation to activate first and ask questions later, it’s essential to seek permission before setting up your station in a park. Some parks may require written permission for activations, regardless of the setup’s profile or impact (remember Leo’s recent field report?).

While most POTA sites allow activations as long as park rules are followed and other visitors aren’t disturbed, it’s prudent to confirm with park staff or experienced activators when in doubt.

In my experience, asking for permission is particularly crucial in parks with historical or ecological significance and limited facilities.

A piece of advice: When seeking permission, showcase your most portable, low-profile radio gear to help park staff understand the minimal impact of your setup. Over the years, this approach has resulted in successful activations for me, with only one instance of declined permission, primarily due to supervisor unavailability.

2. Choose inconspicuous locations

At the Cape Hatteras Lighthouse, I received permission to operate and I set up my station well outside the viewshed of the lighthouse.

When setting up your station, avoid obstructing viewsheds or high-traffic areas within the park. Instead, opt for spots away from major attractions or foot traffic, ensuring minimal disruption to other visitors’ experiences.

Most POTA sites offer designated picnic or parking areas that are suitable for activations without interfering with scenic views. When uncertain, seek guidance from park staff to identify suitable locations.

3. Default to low-impact, low-profile gear

Unless you know in advance that a park allows wires in trees, stakes in the ground, or other antenna support structures, default to your most portable, low-profile, low-impact field setup.

Unless explicitly permitted, refrain from deploying antennas in trees or using stakes that could damage park grounds.

I believe every POTA activator should possess a compact, self-supporting antenna system to minimize environmental impact. Additionally, consider operating from your vehicle if uncertain about setup requirements.

An NC State Park ranger told me last fall, “I like to see POTA activators that aren’t taking up a lot of space and yelling at their radio.

Let’s not be the guy or gal he described!

4. Leave No Trace

Adhering to the principles of Leave No Trace is paramount during POTA activations and other outdoor adventures. Always dispose of trash properly and, if at all possible, pick up any litter you encounter at your operating site. My goal is to always leave the site cleaner and tidier than I found it.

In my backpack and car, I keep small litter bags along with nitrile gloves so that I can pick up and dispose of any trash I find.

Over the years I’ve operated POTA, park rangers and game wardens have caught me in the act of collecting trash and thanked me. I made a point of telling them that I’m an amateur radio operator doing a POTA activation. I feel like this can only leave a positive impression in their minds and help future activators who might seek permission to operate at a particular site.

Want to go a step further?  Consider organizing group clean-up events with your amateur radio club. This collaborative effort not only benefits the park but also strengthens park and community ties.

5. Support your park financially

Show your appreciation for park access by contributing financially, especially at smaller locations with visitor centers or donation boxes. Whether purchasing items from the gift shop or making direct donations, your support is invaluable in maintaining park facilities and programs.

For instance, during a recent visit to a historic site, I made a point to purchase items from the gift shop and donate to the park.

The park rangers thanked me and noted that another frequent POTA activator also donates a bit of money or buys something in the shop each time he visits.  They pointed out how much they appreciate that type of support.

While I usually prefer inconspicuous contributions, I intentionally inform park staff of my status as a POTA activator during these interactions. This transparency reinforces the positive image of amateur radio operators as park supporters.

6. Respect park operating hours

Ensure that your activations align with park operating hours to avoid overstaying your welcome. Familiarize yourself with park schedules and plan your activities accordingly to minimize disruptions and inconvenience to park staff.

I learned this lesson firsthand during an activation at Lake Norman State Park in 2021, where I unintentionally extended my stay past park closing hours. This happened during the week they shifted from more liberal summer hours, to winter hours. I was apologetic to park staff. Since then, I make a conscious effort to wrap up my activities well before closing time and communicate my intentions with park staff if I feel like I might cut it a bit close.

Be a POTA Ambassador

Vlado (N3CZ) draws a crowd on the Blue Ridge Parkway.

By following basic guidelines like these, POTA activators can cultivate positive relationships with park staff and demonstrate our commitment to responsible outdoor recreation.

As POTA Ambassadors, let’s engage with park staff, address any concerns they may have, and showcase the respectful conduct of our community. Listening to their feedback and acknowledging past issues can help mitigate negative perceptions and foster mutual understanding.

Real-word example

During a visit to a new-to-me urban park last year, I proactively sought permission to operate, considering the site’s limited space and popularity among POTA activators. Park staff appreciated my courtesy and expressed gratitude for my considerate approach.

Our conversation revealed previous negative experiences involving POTA activators. These included instances where operators failed to comply with park rules and even exhibited disruptive behavior. For example:

  • One operator tried to set up an antenna by tying a short 2×4 to fishing line and attempting to throw it into a tree. However, this park prohibits the use of trees for antenna support, and his “method” was causing damage to small branches. When asked to refrain from using the tree, the operator became confrontational, insisting on his ‘legal right’ to do so. Despite the staff’s polite explanation of the park rules, the operator angrily packed up and left.
  • Another incident involved a mobile activator who parked his truck in the park’s small lot, occupying three parking spaces, while deploying a hitch-mounted vertical. With a public event underway and all parking spaces occupied, park guests raised complaints. Despite staff requests to reposition his truck to free up space, the activator responded angrily, rolled up his window, operated for a few minutes, and then departed.

Despite these incidents, the staff emphasized that they were exceptions rather than the rule. They mentioned several regular activators whom they enjoy interacting with during their visits. Undoubtedly, these individuals serve as POTA ambassadors, exemplifying our community’s respect for parks and public lands.

Privilege and Responsibility

Wiseman’s View in Pisgah National Forest (K-4510)

While our tax dollars support public lands, park staff retain the authority to regulate activities that may impact park ecosystems or visitor experiences.

The recent notice regarding National Wildlife Refuges in Virginia serves as a reminder of this privilege and responsibility.

Let’s strive to represent POTA activators positively and proactively contribute to our parks’ well-being. Together, we can ensure that future generations continue to enjoy the beauty and tranquility of our public lands.

What are your strategies? Please share your tips and advice in the comments section!

Proper QRO: K4RLC Tours The Edward R. Murrow Transmitting Station

Many thank to Bob (K4RLC) who shares the following guest post:


Visiting VOA Site B: The Edward R. Murrow Transmitting Station

by Bob (K4RLC)

Two week sago, Dale (W4AUV) and I were treated to a “under the hood” visit to the last remaining Voice of America transmitting station in the United States. It is located in eastern North Carolina, and officially known as the “Edward R. Murrow Transmitting Station” part of the “Office of Cuba Broadcasting” in Grimesland, North Carolina. Also, known as “VOA Site B.” This type of shortwave broadcast station is only one of a few remaining worldwide.

[Note: Click on images to enlarge.]

VOA QSL Card showing some of the 38 antennas

This VOA site has been on the air continuously (24/7/365)  since the 1963 on-site dedication by President John Kennedy, broadcasting up 8 transmitters at a time on the short wave bands. There are three 250,000 watt and five 500,000 watt GE, Continental and Telefunken  transmitters feeding 38 possible antenna configurations, with an Effective Radiated Power of 2,000,000 watts. (There is also a 39th antenna, that is a Dummy Load that will handle 500,000 watts).

The antenna field covers over 6,000 acres of flat, costal plain wetlands, not far from the  Atlantic Ocean, so it has a minimal absorption factor and a salt water boost.

Front of VOA Edward R. Murrow Transmitting Station
Wall plaque in lobby explaining the legacy of Edward R. Murrow, who became known while a CBS Radio correspondent in London, broadcasting during the “Blitz” the infamous bombing of London by the Nazis during WW2 (click image to enlarge)
TCI “Curtain” antenna made of 4 dipoles wide & 6 dipoles high, pointed at Cuba. It is controllable in both vertical and horizontal azimuth, depending on the configuration has to up 23dB gain at a 4 degree take off angle

The antennas are fed by over 26 miles of 300 Ohm open line “ladder line” with a minimal SWR and minimal signal loss. The largest antennas are called “Curtain” antennas, given their configuration, of matched horizonal and vertical dipoles suspended between large towers, giving the visual impression of huge curtains.

There are also  rhombics, each 6 wave lengths long. The rhombics are not used as often, given their narrow bandwidth and narrow beamwidth. The Curtains can bathe a large geographic area (such as part of a continent) with a very strong signal. The primary broadcast areas for this station are Cuba, Central and South America, and Africa (although the antennas could reach out and touch Russia and eastern Europe, when needed).

Curtain and Rhombic antennas fed from the antenna switching center
Glenn showing Dale features of the GB-6 transmitter console in the large 8 transmitter control bay
GB-6 Transmitter Monitor & switches
The antennas are well constructed & fed with minimal-loss  open feed line. Note SWR of 1.1:1 at 75,000 watts !
Glenn & Dale studying the transmitter output in the main control room complex
Larger control panel for each transmitter. Note image of “Casper the Friendly Ghost” over the meters for GB-7: There are current problems with the transmitter and, in technical terms, “it’s spooked” !
Antenna switch controller for matching the 8 transmitters with 38 antenna configs.

Glenn & Dale examining the open feedline from Switching station to antenna field; 8 inch coax to Switching station

Many of the engineers are hams, including Macon (WB4PMQ), the chief engineer. Gary (N2AD) transferred to Greenville when the VOA in Bethany, Ohio closed. (The Bethany VOA site operated during WW2 into Germany, and was referred as the “Ohio Liars” by Hilter !)

Glenn (W7GSW), a US Navy communications vet, has been at the site many years and conducted much of the tour for Dale and I. Continue reading Proper QRO: K4RLC Tours The Edward R. Murrow Transmitting Station

K4FMH: “A Living Language? Or Eu tu, Brute?”

I love it when my good friend, Frank (K4FMH), explores amateur radio topics through his academic lens.

Frank recently posted an article about living languages and how that could even apply to our amateur radio/QRP world. It’s a fun read and possibly worthy of a peer-reviewed journal (if they allowed humor)! Thank you for sharing, Frank!

Check out “A Living Language? Or Eu tu, Brute?” on Frank’s website.

Radio Therapy: Fresh air and a little backyard QRP portable

So far, my favorite thing about the Elecraft KH1 is this: it’s a constant radio companion.

Since 2020, I’ve always had a small field radio kit in my vehicle.

My Venus SW-3B kit, which is packed in a headrest pouch, is one example.

When I’m traveling, or just find an opening in the day, I can deploy that field kit and do a little POTA or even SOTA. I know I have a full field radio kit ready to go.

As many of you know, I do a lot of traveling back forth from my QTH to my hometown each week to do caregiving for my mom and dad. Most of the POTA sites I activate are along that corridor between Asheville and Hickory, North Carolina. Having a radio kit in the car at all times makes impromptu activations effortless.

Until the KH1, though, I never had a field radio kit that could so easily live in the backpack/shoulder bag I carry with me everywhere…my EDC bag.

EDC (Everyday Carry)

Linus understands.

Since 2000 or so–back in the days when I was living and traveling extensively in Europe–my EDC bag (sometimes a laptop bag, messenger bag, or backpack) has become a bit like a safety blanket.

I feel lost and unprepared without it.

When I have my EDC bag, I know I have my basics and essentials for working on the road, taking care of small repairs, administering first aid, and even coping with unexpected overnight trips. My EDC bag has the basics for taking care of all of these things and more.

And now, my EDC bag has a tiny QRP field radio kit.

Healing waves…

I’ve been staying with my parents a lot lately–most of the week–doing caregiving for my sweet mother.

This week in particular, I’ve been grabbing my KH1 and using it for a little backyard “radio therapy.”

You see, there has been no time in the schedule this past week for even short POTA activation forays, as much as I’d love that (more on this below).

Instead, I’ve been catching quick radio sessions in my parents’ back yard.

If I worked you this past week, this was my station:

On Sunday afternoon, January 7, 2024, I grabbed my KH1 from the backpack and took it on two short POTA hunting sessions.

In both cases, I walked to the very back of my parents’ yard to distance myself from most of the QRM that surrounds their house.

During the late afternoon session, I decided to grab my camera and make a video.

Video

Here’s a real-time, real-life (short) video of my late afternoon POTA hunting session.  As with all of my videos, I haven’t edited this one. In addition, I have monetization turned off on YouTube, although that doesn’t stop them from inserting ads before and after my videos.

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

Click here to view on YouTube.

Being Present & Thank You

We admitted my mother into Hospice care on Monday (the day after I made the video above) and we don’t expect her to be with us much longer.

Because of Hospice, she is at peace, pain-free, and surrounded by her family. Mom made it clear to all of us that she is ready for the next adventure.

All of my energy is going into being present with her, my wife and daughters, my father, and my sister during this time.

Our community here on QRPer.com has lined up some amazing field reports and articles that will allow me to take a break from writing and, frankly, give me something to read and enjoy as well.

Thank you all for your support and kindness during this time.

72,

Thomas (K4SWL)

Getting To Know You: The Yaesu FT-817/818 Series Portable QRP Transceivers

I’m very fortunate in that in the past few years I’ve acquired a number of QRP radios that I use in rotation when I do park and summit activations.

I’m often asked for advice on choosing radios, and as I’ve mentioned in the past, I feel like the decision is a very personal one–everything is based on an operator’s own particular preferences.

I’ve written formal reviews about most of the field radios in my collection. In those reviews, I try to take a wide angle view of a radio–to see how it might appeal to a number of types of operators. I highlight the pros and cons, but I don’t focus on my own particular take because, again, my style of operating might not match that of readers. I try to present the full picture as clearly as I can and let the reader decide.

The Getting To Know You series gives me an opportunity to highlight one radio at a time and showcase what I love about it and why it’s a part of my permanent radio collection. After we spend a bit of time talking about the radio, we’ll do a park or summit activation with it!

The Yaesu FT-817 and FT-818 Series

As I mention in my “Getting To Know You” video below, my very first dedicated QRP field radio was the original Yaesu FT-817 (non-ND version), so it has a special place in my heart.

At the time, I was living in the UK and travelling extensively throughout Europe with my UK call (M0CYI).

The FT-817 hit the market and it blew my mind. Up to that point, there were no general coverage QRP radios on the market that small, that comprehensive, and that even sported VHF/UHF multi-mode coverage. It even had a small internal battery pack! What?!

I was an early adopter of this radio and travelled with it extensively–indeed, in all of the years I lived in the UK and Europe, the FT-817 was my only amateur radio transceiver.

Fast-forward to 2023–some 23 years later–and I still have an 817. Actually, I have two 817ND’s and one 818ND (although, I plan to sell one of my 817NDs soon–I don’t need three!).

I find the 817/818 to be an incredibly robust and capable field radio. It’s also a brilliant value–few radios offer you the capabilities of the FT-817/818 for under $700.

My FT-817ND in an Armoloq TPA-817 Frame.

Yaesu discontinued the FT-818ND almost exactly one year ago. Retailers no longer have new stock, but there are loads of them on the used market. Keep in mind that the FT-817/818 was a cash cow for Yaesu for over two decades–the used price remains fair because there’s just so much supply out there. I routinely see 817ND and 818ND models selling for between $375-700 depending on how they’re configured and what’s included.

If you’re looking for a comprehensive article about the Yaesu FT-817/818 series, I would encourage you to check out this piece I originally wrote for The Spectrum Monitor magazine.

Time to activate! Continue reading Getting To Know You: The Yaesu FT-817/818 Series Portable QRP Transceivers

Guest Post: Watch Your Tone

Many thanks to Matt (W6CSN) who shares the following post  from his blog at W6CSN.Blog:


Watch Your Tone

by Matt (W6CSN)

In this modern era of radio technology, where even analog radio is largely digital, we amateurs are accustomed to perfect signal quality all the time.

Nevermind the perfunctory 599s that are handed out during contests, for activities like Parks On The Air and Summits On The Air I believe most of us like to send and receive an honest RST report.

R-S-T from the 1938 edition of the ARRL Handbook

Although subjective, readability (R) and signal strength (S) are pretty well understood quantities. But what about tone, the T in R-S-T ? When was the last time you sent or received a tone value other than “9” (the highest value) ?

Last evening, at the end of one of my frequent activations of the Presidio of San Francisco (K-7889), I struggled to pull a barely readable and very weak signal out of the noise. For what it’s worth, the natural noise floor was very low, with the geomagnetic field listed as “Inactive” on qrz.com.

One of these stations had a distorted signal ?

What made the signal particularly difficult was that it sounded quite distorted. The problem I faced was how to tell the OM that it sounded like his signal had been through a blender. The numbers in the Tone scale go from 1 to 9 but I did not have any understanding of the specific defects encoded by the scale. I needed to send a report, and quick, so I dashed out a “225” followed by “DISTORTED.” But I was unhappy that I needed to send an extra, unexpected word to explain the reason for the “5” tone.

Tone

1–Sixty cycle a.c or less, very rough and broad.
2–Very rough a.c., very harsh and broad.
3–Rough a.c. tone, rectified but not filtered.
4–Rough note, some trace of filtering.
5–Filtered rectified a.c. but strongly ripple-modulated.
6–Filtered tone, definite trace of ripple modulation.
7–Near pure tone, trace of ripple modulation.
8–Near perfect tone, slight trace of modulation.
9–Perfect tone, no trace of ripple or modulation of any kind.

http://arrl.org/quick-reference-operating-aids

When I got home I resolved to refresh my knowledge on the R-S-T system so that I could have it at my disposal while operating and on the rare occasion when a tone value other than 9 is warranted.

May your signals always be strong and pure.

73 de W6CSN

Bob pairs the KX2 and AX1 for ultralight travel-friendly SOTA in Greece

Many thanks to Bob (K4RLC) for the following guest post:


Field Trip to Greece: September & October 2023

 Bob (K4RLC)

A trip to Greece had been on the bucket list for my YL Alanna K4AAC and me for several years. In fact, we had to postpone the trip twice due to COVID. An opportunity arose to take a unique trip to Greece with the University of North Carolina – Chapel Hill, rather than a more touristy cruise. It’s always good to have fellow Tar Heels around, to share experiences.

This trip involved a few days in Athens, seeing the classic archeologic sites such as the Parthenon and the Acropolis, as well as exploring the packed downtown markets, such as Plaka and Monasteraki Square. Then the group would travel to the South of Greece on the Peloponnesian Peninsula staying in a fishing village called Gytheio, founded in the 5th Century BC, and port to the Spartan warriors.   From there, there would be day trips to historic sites. These included a trip to Areopoli, where the Greek revolution against the Turks started in 1821. Another trip would be to Monemvasia, an island fortress founded in 50 AD.  Other trips would be to Mystras (the last outpost of the Byzantine Empire) and ancient Sparta. On the return trip to Athens for departure, the tour would stop in Ancient Corinth, which had been civilized by the Greeks by the 8th century BCE and where the Apostle Paul preached ethics to this Sin City of ancient Greece.

As I had taken the KX1 and KX2 to various places overseas, I, of course, wanted to operate portable radio  in Greece. Past treasured memories included enjoyment operating with the KX1 on Suomenlinna Island, in the Bay of Finland, and with the KX2 in various Caribbean sites, including St. Lucia in 2019.

One of the first things I did was to consult the SOTA Summits Database for peaks we might be near. In the Peloponnesian (PL) region, there are about 180 sites, many of which had never been activated. Once we got there, we found out why. The peninsula is extremely mountainous, with steep barren peaks up to 4000 feet, rising quickly from the shore. In fact, talking with Cristos, our guide in Areopoli and a local young man, he said that he and his friends would hike about 6 to 8 hours to a summit, then spend the night in a cave before returning home. Obviously, this would not fit in with our somewhat rigid tour schedule.

Olive tree grove & Taygetos Mountains
SOTA map of Peloponnesian Peninsula with Gytheio circled

I was very excited to see that Mt. Mystras, where we would visit, also was a SOTA site (SV/PL-012), as well as a UNESCO World Heritage Centre.

I found it curious that Mystras had not been activated since 2017. I found the name of the last ham who had activated this site, and took a chance of sending him an email at his QRZ address. I was very pleased to get a nice reply from Cristos (a common name in Greece, named after Saint, or “Agios” Christopher), who said that he lived in the north of Greece some distance away and had not been back. I asked him if he had to seek permission to activate there. Cristos said they just didn’t ask anybody, but that I should be “careful of the guards” as I’m not a local.

I took his caution under advisement and reached out to the Greek Radio Union. I received a very nice email from Takis, Vice President of the Greek Radio Union. He advised me that my call sign on the Peloponnesian peninsula would be SV3/K4RLC/P. That is, in Greece the geographic location of operation still matters, while it doesn’t in the United States. And I also should use the designator P, identifying as a portable station. Takis went on to write that radio operation in many the archaeological sites is now “prohibited” by the Greek Ministry of Culture and Antiquities. I filed that away for consideration.

The tour was culturally enriching, taking in the incredibly long and complex history of each ancient site we explored. Just as memorable, we were extremely well fed with local cuisine, including fresh fish caught that day, especially eating by the water in Limeni on the West Coast of the Mani Peninsula. I have to admit we ate spanakopita at least once for 10 consecutive days (it’s even served at breakfast)!

The trip to Mystras also included a trip to ancient Sparta, civilized in the 6th and 5th centuries BC. We were fortunate to have an archaeologist who is currently excavating Sparta as a guide to the fascinating history here. On the trip to Mystras, three miles to the west of Sparta, the bus stopped at the tavern where we would return to eat later that afternoon, for a pre-tour bathroom break. Bathrooms are few and far between in ancient sites, and most of our group could be considered geriatric and needed proximity to a bathroom. Mystras  is a 682 meter sharp  peak over the town (see photo). Continue reading Bob pairs the KX2 and AX1 for ultralight travel-friendly SOTA in Greece

Coffee, QRP, & Question: Is any field kit more portable and versatile that Elecraft’s KX2/AX1 combo?


Lately, I’ve been kitting out another fully self-contained field radio kit that would be small enough to fit in my EDC (everyday carry) laptop bag–something super compact.

I’ve been getting some great ideas from those of you who have added your kits to the Field Radio Kit Gallery.

[By the way, if you’ve submitted your kit to the gallery and haven’t seen it yet, note that I’m posting these in the order received and there are many in the pipeline!]

I’ll likely build my EDC field kit around the Elecraft KX1 or the Mountain Topper MTR-3B, then pair it with a good wire antenna.

My EDC laptop bag: the Tom Bihn Stowaway

But this process got me thinking: if money was no object, and I wanted the most compact and versatile multi-band field kit, what radio and antenna system would I choose?

My answer? A kit built around the Elecraft KX2 and AX1 antenna.

In my experience, the KX2 AX1 combo is hard to beat. It’s compact, effective, low-profile, and you can set it up pretty much anywhere.

Let’s explore my reasoning here keeping in mind–in my world–this is a very deep rabbit hole to go down. I’ll do my best–no promises–to keep this as concise as possible:

Compact, Low-Profile, Self-Supporting, and Simple

Here are all of the components of my typical KX2 AX1 field kit:

This is all that is needed for a field activation.

And if you’re an SSB operator? You don’t really need a microphone because one is built into the KX2 (that said, I’d suggest you build a compact mic if you plan to do a lot of SSB operating).

If I wanted to make this kit even a bit more versatile? I’d add a kneeboard to the list. This gives one the ability to operate without a picnic table.

I recently published a video showing how the KX1 and AX1 can fit on a kneeboard.

Portable and Versatile

What makes this field kit so portable is that the KX2 is one of the most compact general coverage HF transceivers on the market.

It’s certainly the most compact (at time of posting) when you realize that two important components–the battery and ATU–are internal options.

The AX1 antenna is also incredibly compact–it comes apart in such a way that no one component is longer than about 6 inches. What you see in the photo above is the entire radio and antenna system.

Yes: A Compromise

Sure–and let’s get this out of the way right up-front–the AX1 is a compromised antenna, and being a massive fan of simple wire antennas myself, I know a properly deployed wire in a tree is going to provide better gain each and every time.

Also, people who live in more remote parts of the world–say, Hawaii, the Yukon, or Perth, Australia–where the amateur radio density is sparse within their propagation footprint, the AX1 will not be as productive as it is for me here in the eastern half of North America. Continue reading Coffee, QRP, & Question: Is any field kit more portable and versatile that Elecraft’s KX2/AX1 combo?