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Operating

Operating Notes: 40-meter DX, two Ohio POTA activations

May 23, 2025 By Dan KB6NU 1 Comment

Recently, there have been some complaints about propagation on the HF bands. Last night, however, propagation was pretty good on the 40-meter band. I managed to work four DX stations, including one LU (Argentina), one YT (Serbia), and two HAs. All of them were S6-S7 and very good copy.

The two stations from Hungary were both from the same town (Miskolc). I’m wondering if the first one called up the second and let him know that propagation was good to the U.S.

Finally got Ohio in the POTA log

Last year, on my way down to the Dayton Hamvention, I activated two parks: Van Buren State Park and Grand Lake St. Marys State Park. Unfortunately, those logs never got uploaded. As I was leaving the second park, my phone died. And, it wasn’t just that the battery needed recharging. It was completely dead. I lost both logs, and when I got to Dayton, I had to buy a new phone.

This time, I had much better luck. Van Buren State Park is right off the I-75 freeway. As soon as you get off the freeway, you’re in the town of Van Buren. Drive through town (about four or five blocks) and you come to the park. I set up in a shelter close to the entrance because there was a possibility of rain. Despite complaints about poor band conditions, I made 30 contacts in an hour, including a couple of DX contacts. I would have stayed longer, but that evening, I was meeting some people for dinner, so I packed up and headed to the second park.

Lighthouse next to a lake.
Even though it’s an inland lake, Grand Lake St. Mary’s is so big that has a lighthouse.

The second park I activated was Grand Lake St. Mary’s State Park. I like this park because, even though it’s an inland lake, it has a lighthouse (see above). So, I get both a park activation and a lighthouse activation.

Grand Lake St. Marys is a man-made lake that was constructed in the early 19th century as a reservoir for the Miami and Erie Canal, which connected the Ohio River with Lake Erie. At one time the lake was the world’s largest man-made lake.

The threat of rain was even more real here, so I found another shelter to set up in. That kept me nice and dry. Unfortunately, the shelter I decided on was very close to some homes near the lake. The problem with that was that it was very noisy there. I managed to make 15 contacts in about an hour, but I know I missed at least one because he was down in the noise. I would have been able to make that contact if I’d been at Van Buren State Park.

After I packed up, it was off to Dayton. This time, my phone didn’t flake out on me, and I made it to the hotel in plenty of time to get ready for dinner. Overall, it was a great way to kick off my Dayton 2025 trip.

Filed Under: Hamfests, Lighthouses, Parks on the Air Tagged With: Hamvention, POTA

Random Notes: KB6NU at the South Pole, operating W7P, RF in the shack.

April 9, 2025 By Dan KB6NU Leave a Comment

Amateur radio antennas at the NSF Amundson-Scott South Pole Station.

KB6NU at the South Pole (well, my study guides anyway)

A week ago, I got the following email from David Williams, who’s working at the United States Antarctic Program NSF Amundson-Scott South Pole Station. According to their website, “the station is the southernmost year-round research station in the world, and supports scientific studies in astronomy, astrophysics, aeronomy, auroral studies, geospace research, meteorology, geomagnetism, seismology, earth-tide measurements and glaciology. The station’s geographic location allows unique astronomical observations, benefiting from clear, dry air and the absence of light pollution.”

David writes:

Greetings,

I want to thank you for writing your study guide- A few of us down here for Winter are going for Ham radio licenses and part of the study materials we are using includes your PDFs.

Our equipment down here requires a General class at minimum. We would use it to contact McMurdo Station in an emergency.

I’m very new to the hobby but it’s really interesting to learn about! We will all go for our licenses after a few weeks of study likely.

How cool is that? I’m glad that they’re able to use my study guides, and I hope that a bunch of them get their licenses.

Operating W7P

Yesterday, I operated as W7P for the first time. W7P is one of the call signs being used for the Narwhal Amateur Radio Society’s Polio on the Air special event, which is commemorating the 70th anniversary of the Salk polio vaccine. Other call signs for the special event include W7O, W7L, and W7I. So far, I’m the only CW operator.

Last night, I made 25 contacts on 7035 kHz in about an hour. I worked stations as far west as North Dakota and as far east as Spain (my only  DX contact).   It was a lot of fun.

The even runs through Saturday, and I’m scheduled to operate tonight and Thursday night at 0000 UTC. You can listen for me again on 7035 kHz.

RF in the shack

Something wonky is going on with my trusty Cobra antenna, and I’m not sure what exactly. Somehow, I’ve started to get RF in the shack. I do run the ladder line right into the shack, but the antenna’s been up for nearly 10 years now, and this hasn’t been a problem.

One thing that I’ve been thinking about doing is to connect the 450Ω feed line to a balun outside and run coax into the shack. I’m also thinking that maybe I should rebuild the antenna. That would clean the contacts.

If you have any thoughts about this, please leave a comment below or email me directly.

Filed Under: Antennas, Classes/Testing/Licensing, Special Events Tagged With: Cobra, rfi, W7P

Videos: Single sideband, HAMNET update, HF propagation

March 21, 2025 By Dan KB6NU Leave a Comment

Introduction to SSB

This is an Air Traffic Command instructional video describing the theory behind single side band (SSB) modulation. Dig that jazzy intro music!

HAMNet Update

HAMNET (Highspeed Amateur radio Multimedia NETwork) is a fully-independent amateur radio wireless network that provides data services. It’s a wireless internet, so to speak. It covers many regions in Europe and is even now growing fast beyond its European border. Hamnet is using international coordinated IP-address space of the AMPRNet (44.0.0.0/8) and Autonomous System (AS) numbers out of the 16-bit and 32-bit private AS number space to interconnect active regions by external Border Gateway Protocol (BGP) routing.

Here is an up date on HAMNET given at the recent FOSDEM conference.

Rohde & Schwarz on HF Propagation

Rohde & Schwarz produces some of the finest RF instrumentation in the world. They also produce great videos on RF topics. This one explains HF propagation.

Filed Under: Communications Theory, Digital Modes, Networking, Propagation, Videos Tagged With: HAMNet, single sideband

Operating Notes: Why do people tune up on your frequency?

March 7, 2025 By Dan KB6NU 3 Comments

A couple of days ago, I was calling CQ on 40 meters, when someone decided they wanted to tune up on my frequency. He had a very strong signal, so it was unlikely that he hadn’t heard me calling CQ. The band wasn’t crowded, so I simply moved up a kHz and began calling again, but I just don’t understand why people do that.

After one or two calls on my new frequency, I get a call from the guy who tuned up on top of me earlier. I know this because he told me that if I’d waited another 10 seconds, he would have answered my CQ earlier.

I explained to him that there was no way for me to know if he was going to call me or not, and that more often than not, stations tuning up tend to just disappear. All I knew is that there was a strong station tuning up on my frequency, and not only that, his tuning up was preventing other stations from calling me.

He seemed to get the idea and apologized.

Ham radio is no place for politics

We proceeded to have a generally nice contact. At one point, however, he mentioned that he had watched Trump’s speech earlier, and while I forget his exact words, I got the impression that he generally approved of the speech. I was a bit taken aback at this. It’s just not good practice to discuss politics on the air, especially on CW!

I simply ignored the comment and moved on to other topics. I’d suggest that you do the same, whether these comments are made on 40-meter CW or 2-meter FM.

CQ SALK

On Mastodon last night, I saw a post from N3VEM about the Narwhal Amateur Radio Society’s Polio on the Air operating event. According to the NARS website, the operating event is a  “celebration of the 70th anniversary of the April 12, 1955 US approval of the Salk polio vaccine.” It will run from April 5 – 19, 2025.

Being a member of a Rotary club here in Ann Arbor, this really piqued my interest. Rotary International has been working to eradicate polio for nearly 40 years now, and as a result of our efforts to vaccinate children all over the world, we’re very close to doing so. And, in the past, I’ve set up and operated a special event station to commemorate the founding of Rotary and make people aware of our End Polio Now project.

NARS will be operating five special event stations—W7P, W7O, W7L, W7I, and W0O—during that time. They also say, “Make contact with one, get a QSL card. Make contact with all five, get five QSL cards—and something really neat happens if you collect all five!”

One of the unique aspects of this special operating event is that you can sign up to use one of the special event callsigns as well as hunt the special event stations. See the Polio on the Air web page for details on how to do so. I plan to sign up for several hours and operate CW, of course.

Filed Under: CW, Operating Tagged With: Narwhal Amateur Radio Society, poilo

Videos: QRP FT-8 Transceiver, vintage FD video, QSO with SV8ANW

January 19, 2025 By Dan KB6NU 1 Comment

DX FT8: A QRPp, five-band, standalone transceiver

I recently swapped some email with a fellow who purchased a quantity of Tech study guides for a class he’s teaching (only $11/copy!). In addition to talking about the study guides, we got to talking about microcontroller projects. He wrote, “I assume you’ve seen the microcontroller based, standalone FT8 transceiver already, but if not it’s worth a peek: https://www.youtube.com/watch?v=8b2WOxESAVU.”

Well, I hadn’t heard of it, so I did give it a peek. The DX FT8  looks like a very cool project. If I didn’t already have a dozen half-finished projects already, I might give this one a go.

Vintage Field Day 1962

This video reminds me of the home movies that my dad used to take back in the 1960s. Instead of Christmas and birthday parties, however, these show hams setting up and operating on Field Day 1962. Like the video says, there are “lots of vintage ham radio equipment, antennas, portable generators (look at the size of that thing at the 6:00 mark!), baked beans, and radio fun.

Couple observations:

  • The participants seem to be, on average, younger than today’s FD participants.
  • Note that there are two hams per station, one operating and one logging on paper. We do this by computer now.
  • There was probably more cigarette smoking and beer drinking than you’d find at today’s Field Day operations.

KB6NU de SV8ANW

Shortly after working Dimitris (Jim), SV8ANW, he sent me an email with a link to a YouTube video of our contact. Notice that he has a very nice bug fist.

Filed Under: Building/Homebrew, Digital Modes, Operating Tagged With: DX, Field Day, FT8

ITU offers spectrum-management classes

January 15, 2025 By Dan KB6NU 3 Comments

I’m not sure how I got on this particular ITU mailing list, but I got an email this morning announcing some spectrum management courses that the ITU is offering:

  • SMTP – Advanced spectrum authorization regimes
    3 – 28 February 2025 | Online
    Explore modern spectrum management approaches, focusing on advanced allocation, dynamic access, flexible use, and innovative licensing to optimise spectrum resources.
  • Satellite coordination procedures & fillings 
    17 February – 14 March 2025 | Online
    Learn about ITU’s Radio Regulations, covering orbit spectrum allocation, satellite filings, coordination procedures, regulatory examinations, and BR space tools and databases.
  • SMTP – Opportunistic spectrum access & cognitive radio
    17 February – 14 March 2025 | Online
    Gain insights into opportunistic spectrum access, spectrum sensing techniques, white space utilisation, and current regulations on Cognitive Radio and White Spaces.

The cost for these is $300 each, so I’m not sure that individual hams will want to sign up for these classes, but perhaps it might be worthwhile for someone at the ARRL to sign up for one or more. That is, if there is anyone left there whose job it is to keep up with advances in spectrum management.

One free event that hams certainly might be interested in attending is the seminar E1 – LEO Satellite Constellation Fundamentals, 30 January 2025, 14:30 to 16:30 CET. The description for this seminar reads:

Kickstart your 2025 space journey with our inaugural Space Connect session! In this first installment of our exciting new series, we’re diving into the revolution happening in Low Earth Orbit.  Discover the orbital choreography of modern satellite constellations and the radio spectrum that makes global connectivity possible. ITU Secretary-General Doreen Bogdan-Martin and Director of Radiocommunications Mario Maniewicz will open this session, followed by expert insights into the technology and market forces driving the LEO satellite boom. Join us for this first step into the future of space communications. Save your spot now – and stay tuned for more fascinating Space Connect sessions throughout 2025!

I think that they’re probably going to be talking about things like Starlink, but perhaps this could get some hams thinking about doing a ham radio version of Starlink.

Filed Under: On the Internet, Rules, Regulations, Enforcement, Satellites Tagged With: spectrum management

Interesting Stuff: Pico-based SDR runs standalone, texting over HF, HamClock on WiFi

November 27, 2024 By Dan KB6NU Leave a Comment

There’s so much interesting stuff out there that I’m never going to get to it all. I blog about these projects, though, so that I don’t forget about them and to let others know about them. If you’v ever built or used one of these projects, please leave a comment below or email me directly.

Pico-based SDR runs stand-alone

Microcontrollers are getting to be very powerful. The Raspberry Pi Pico, for example, feature dual core processors, running at frequencies up to 150 MHz, with 520 kB of SRAM, and 4 MB of on-board flash memory. They’re very inexpensive, too. You can get one of these microcontrollers from reputable dealers for less than $8. If you’re willing to take a flyer on Ali Express, some of them are going for less than $2.

As shown in the video, this lets one build a software-defined radio (SDR) without a PC!

Think of the possibilities. One of the things that comes to my mind is to couple this with an Si5351 module and amplifier to make a small HF transceiver.

For more information:

  • Article discussing how it works.
  • Discussion on [email protected].

Chirp to send text messages

PA3FWM has developed a new digital mode he calls LongChat that uses chirp signals with an audio bandwidth 300 Hz–2700 Hz. Pieter claims that LongChat is very power-efficient and offers good performance even at very low power.

For more information:

  • Article: Signal/noise ratio of digital amateur modes.
  • Free LongChat software and setup instructions.

HamClock on a Raspberry Pi Zero 2W

Small printed-circuit board connected to a laptop via a USB cable.
Adam Drake, VE7SAL, coerced this Raspberry Pi Zero 2W to run HamClock.

The September-October 2024 issue of the Surrey Amateur Radio Club (SARC) Communicator has a great article on using a RPi Zero 2W to run HamClock. The unique thing about this implementation is that is uses the WiFi capability of the RPi Zero 2W to make, in effect, a HamClock server. With this running, you could then display HamClock on your laptop, a tablet, or even your phone.

For more information, see PE4BAS’s implementation of this project.

Filed Under: Digital Modes, Software-Defined Radio (SDR), Station accessories Tagged With: HamClock, LongChat, Raspberry Pi Pico, SDR

Videos: POTA with 1930s gear,

October 24, 2024 By Dan KB6NU Leave a Comment

Think you need modern gear to do POTA? Think again.

Rattlegram: Text over FM

Send text via an FM radio using an app on your Android or iPhone.

Go to https://www.aicodix.de/cofdmtv/rattlegram/ for more info.

Hallicrafters: The Amazing World of Shortwave Radio

This isn’t a video, per se. It’s a video made from an audio recording originally released on a 45 rpm vinyl record. It gives you a taste of what shortwave broadcasting used to be.

Filed Under: Digital Modes, Parks on the Air, SWLing, Vintage Radio Tagged With: Halicrafters, Rattlegram

RSBG Operating Manual will help you have more fun with amateur radio

October 19, 2024 By Dan KB6NU Leave a Comment

Ed Durrant, G8GLM/DD5LP/VK2JI. The  Amateur Radio Operating Manual (Nineth Edition). 2024. Radio Society of Great Britain (RSGB). £17.99.

A couple of months ago, Ed Durrant, DD5LP, my co-presenter on the ICQ Podcast, emailed me and told me that he was going to be the editor of the next edition of the RSGB’s operating manual. Knowing that I was a Parks on the Air (POTA) enthusiast, he asked if I would write the section on POTA. I quickly agreed. My payment was a copy of the book, which arrived a couple weeks ago.

The topics covered by this book are very similar to topics you’ll find in The ARRL Operating Manual for Radio Amateurs, and except for the chapter on regulations, all of the information in this book is applicable to radio amateurs no matter where they live and operate. There are chapters on:

  • what frequencies amateurs can use
  • what modes amateurs can use
  • how to make contacts
  • how signals propagate
  • how to work DX
  • contesting and awards
  • mobile and portable operation (where you’ll find what I wrote about POTA, as well as sections on SOTA, BOTA, IOTA, and more)
  • FM, repeater, VHF, UHF, and satellite operations
  • logging and QSLing

Plus, there is an appendix which list all of the DXCC entities and their call sign prefixes, as well as an appendix on how to make foreign language contacts, if you’re feeling adventurous.

My section aside, this would be a great book for a newcomer to amateur radio. It’s a great introduction to all of the operating fun we can have in our hobby. It might also be a good book for some of us old timers who may have gotten stuck in our ways. There’s always something new to try in amateur radio, and this book could help you get started in doing something new and fun.

Man sitting at a park’s picnic table.
This photo of yours truly operating POTA from US-1573 appears in this edition of The  Amateur Radio Operating Manual. I suggested to Ed that he might want to use a picture of a British ham operating from a British park, but he insisted on getting my picture into the book.

Filed Under: Books and Magazines, Operating Tagged With: rsgb

RSGB Logbook: Explorer gets hams involved

October 9, 2024 By Dan KB6NU Leave a Comment

I’m not really sure where I found out about the RSGB Logbook: Explorer, but I like it a lot. It’s sort of a British version of my 21 Things to Do After You Get Your Amateur Radio License, but it’s a workbook that hams can print out and then fill up as they go along. Here are the activities included in the RSGB Logbook:

  • Register online. In this step, the new ham is asked to set up accounts on QRZ.Com, Logbook of the World, the RSGB QSL Bureau, and EchoLink.
  • Build a wire antenna. This task is to build a simple wire antenna and then describe the antenna.
  • Make 10 contacts through a repeater and log them.
  • Make 10 contacts on 2-meter simplex and log them.
  • Make 10 POTA contacts and log them.
  • Make 10 Summits on the Air (SOTA) contacts and log them.
  • Make 10 Bunkers on the Air (BOTA) contacts and log them.
  • Worked All Britain. Make 10 contacts in 10 different grid squares in Britain and log them.
  • Use different modes on HF. Make 10 HF contacts using at least two of the following modes: CW, FM, FSTV, FT4, FT8, JS8, JT65, MFSK, packet radio (AX25), PSK31, RTTY, SSB and SSTV; you MUST use at least 2 bands from the following list: 40m, 30m, 20m, 10m.
  • Make 10 VHF/UHF contacts on any band but 2 meters and log them.
  • Take the RSGB Quiz. The quiz consists of 10 questions that invites the readers to do a little research on famous radio amateurs and a couple of technical topics.

I think that perhaps for the next edition of 21 Things I’m going to use this format. It’s more interactive, and it just might get more hams to try new things with their licenses. Of course, some of these activities don’t really apply to U.S. hams. The reason for this is that British hams get more HF privileges than U.S. hams, but perhaps I can slant the activities I  include to target those things that U.S. hams can do.

And, since everyone likes awards, I’ll design certificate for those that complete 75% of the logbook and submit proof of the activities that they’ve completed.

To see how one ham used the RSGB Logbook: Explorer, read read this article on the RSGB website.

Filed Under: Books and Magazines, Operating Tagged With: RSGB Logbook

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