AmateurRadio.com

In this episode, Martin M1MRB is joined by Chris Howard M0TCH, Martin Rothwell M0SGL, Ed Durrant DD5LP, Frank Howell K4FMH and Bill Barnes WC3B to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief and this episode’s feature is Homebrew CAT and Programming Cable

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• First Ireland & Slovenia Contact made on 40 MHz Band
• Transatlantic Emergency Call
• UK Radio Ham Answers Call for Help
• Ham Radio Saved My Life!
• Presenter Article: Prominent Ham Operators Lead Major Covid-19 Pandemic Effort
• First Annual “Dream Rig” Youth Essay Contest
• Online Remote Invigilation Expanding
• GB100RS Special Event
• Wales Special Event GB0WMZ
• NRRL form Vision and Action Working Group

Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Ham College episode 66 is now available for download.

Extra Class Exam Questions – Part 4
E1D – Amateur space and Earth stations; telemetry and telecommand rules; identification of balloon transmissions; one-way communications.

1:03:10

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George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].

For several decades, I taught statistics in Departments of Sociology and used them in my Labs in research centers and institutes. Much of my academic career pioneered the use of computers in social science research. There I frequently hired electrical and computer engineering students to work in my Lab. In fact, I’d get a stream of both undergraduate and graduate students sent by CS and CE faculty over to try and get a job in “that guy Howell’s Lab.” The comment was usually based on the student receiving the CS/CE faculty advisor’s advice: you’ve got what we’re teaching you down well. Go work for Dr. Howell if you can. He’s always doing weird stuff that you supposedly can’t do.” Plus, I paid well. OK, weird stuff being defined as what others say you can’t do was always taken as a badge of honor! Like Artisoft who sold us Lantastic saying we could not use their LAN software in a TCP/IP stack. We did. Later Microsoft Workgroups and Novell pushed them out of the marketplace because they didn’t adopt that stack and couldn’t compete.

One thing that surprised the E.E. faculty was what we actually taught as fairly commonplace in the social sciences. In my graduate courses, I frequently had other professors ask to audit the course so they could get on top of the topic my course was emphasizing that semester, such as survey research methods, data management and computation, statistical methods (basic and advanced), structural equation models, or spatial analysis of social data. During the late 1990s, I was a Coordinator of a 5 year, $60M project in commercial remote sensing with NASA and a Department Head in the Agricultural Experiment Station. A couple of years earlier, I was sitting in a Department Head’s meeting when the Department of Forestry Head, a golfing buddy in the Faculty Golf League, asked if he should replace the remote sensing faculty member who had just retired. My response? No, unless you want to be a good Department of Forestry. If so, hell yes! I helped him hire a top flight GIS and remote sensing scientist who was being down-sized from the USDA Forestry Lab located on leased space on campus at Mississippi State University. David was one of the very best in the nation at photogrammetry or identifying what’s on the ground based upon pictures taken from the sky.

I’ll get to the point of this here. David was conducting a workshop to all of the MS Space Commerce Initiative team I coordinated on using Landsat data for photogrammetry (landuse from landcover inference in this case). As he began walking through the two fundamental statistical techniques of analyzing the eight bands of sensor data from Landsat I, an E.E. Professor, Roger, noticed I wasn’t taking notes. Roger began to goad me with, “What’s the matter, Howell? The sociologist lost already?” David the instructor just smiled as he and I had worked together during the proposal phase of the MSCI. I said nothing as David explained phase one of the analysis was conducting a Principal Components Analysis (PCA) on the 8 Landsat variables, extracting several principal components from the data. During the next phase of analysis, the K-Means Clustering, Roger couldn’t help himself, repeating what was basically a mantra of can’t the social scientist keep up with the engineers? You’re not even taking notes! David asked me if I cared to respond. I did and said, politely, that when David got to material that I didn’t already teach in our second graduate statistics course, I’d take notes! Roger’s flag was quietly folded and he later asked me how to handle missing data (sensor dropped out, etc.) in the multivariate analysis. I later learned a lot from Roger about his goniometer and using it to calibrate ground-based test images from test sensors against a “white” color standard. Some other engineers in weed science laughed at Roger’s application but he’s a smart guy. He just didn’t have any idea of what is taught outside the College of Engineering curriculum! And that’s more typical than many realize.

The moral of this little story? Engineering can get quickly silo-ed in terms of what is learned in the curriculum. Some mathematics training focused on Fourier Transforms and the like doesn’t necessarily generalize to all numerical computations. And statistics is likely one of them. But many engineers, especially those trained in earlier decades, don’t always recognize it. Yet, with the transition from the analog to the digital world, statistics are increasingly important to understand the data arising from not only the digital circuity but the digital test equipment necessary to design, test, and repair it. And this says nothing about the incredible data visualization methods and tools now available for such data (for an example, see the 3D Smith Chart implementation). Frequently, as in the team creating the 3D Smith Chart, cross-fertilization of ideas outside engineering can yield breakthroughs that won’t come about from more silo-ed training. But this does not tend to happen in the silos we in academia and the engineering industry have created.

I was delighted when the All About Circuits email hit my inbox with a new column by Robert Keim regarding statistics in engineering. The first column is “Descriptive Statistics in Electrical Engineering” and will be followed by on one inferential statistics. This will make an impact, I’m sure.

Beginning with the basics, he explains how the simple mean score can assist in analyzing noise in two signals: “A mean is a straightforward way to reduce noise in a collection of measurements, because it approximates the value that would be observed if we eliminated the small positive and negative deviations caused by noise. We can also use the arithmetic mean to determine the DC offset of a waveform.” Now, this isn’t earth shattering analysis but he walks the uninitiated reader through how simple descriptions of data on signals can be of great benefit. Roger’s future columns will continue this line of application. I hope.

Amateur radio operators who have electronic workbenches and have read test equipment texts by Joe Carr or Bob Witte are already aware that statistical tools are the foundation of measurement in electronic design and testing. Joe Carr’s Elements of Electronic Instrumentation and Measurement (3rd ed.) contains two opening chapters laying the foundation for descriptive statistics and their role in measurement. In some of Joe’s other texts, he discusses electornic measurement theory regarding what test gear measures and what the phenomenon actually is: the difference largely being measurement error. That’s the same as True Score Theory which I taught using Lord and Novick’s (1968) classic text plus other materials.

Whether it’s digital signals in electronics or Rosenberg’s Self Esteem Scale, it is the same measurement theory: all about the error term. And how you understand measurement theory instead of just meter readings.

Bob Witte K0NR’s Electronic Test Instruments: Analog and Digital Measurements (2nd Ed.) spends part of Chapter 1 on Measurement Theory, invoking statistical aspects of the fundamentals. Formerly at HP and then Agilent, Witte’s 1st and 2nd edition texts are terrific reads and teaches much in straightforward fashion. But understanding the material requires understanding some statistical principles as foundational. He does a good job weaving that into the narrative. I highly recommend Witte’s textbook. I have both editions in my library.

Much of what I’m writing about here is exemplified in the narratives on various websites and social media outlets regarding the exciting NanoVNA and it’s various offshoots. Arriving on the scene over a year ago, the $50-ish dual port Vector Network Analyzer has caught the amateur radio experimenter market by storm. And, has propelled the rank-and-file ham to ask, “Is the NanoVNA better than my MFJ-269 antenna analyzer?” While the two instruments are fundamentally distinct in many ways, something for $50 or double will catch many eyes. But the many discussions about the software tools for the NanoVNA, especially around the necessity of calibration of the NanoVNA and how that works, really hinge around a good understanding of measurement theory and a sound statistics base of knowledge.

So that’s why I’m delighted to see that All About Circuits is featuring a new regular column by it’s Directory of Engineering concerning the use of statistics in electrical engineering. Don’t assume you already know it because you can do FFT’s in your sleep (or did while take a course). There’s a lot more awaiting you. And more on the way in the burgeoning digital world that is today’s electronics field. Now, let me open that box with the NanoVNA-H that arrived this week…..I might also need to review some trigonometry.

Frank Howell, K4FMH, is a regular contributor to AmateurRadio.com and writes from Mississippi, USA. Contact him at [email protected].

The annual 13 Colonies special event  (please view link to learn more about the event) was going on during the RAC Canada Day contest on July 1st. Last year I read about this event on Larry W2LJ's blog last year and he had a posted about it as well as this year. While I was operating the RAC Contest I found over and over a number of the special call letters from the 13 colonies event kept popping up. I then decided my operating would become contesting /13 Colonies Event operation. I was shocked that by the end of the evening I had a total of 9 of the 13 special calls in the log. Now there really are 15 stations you can contact as there are 2 bonus stations and I was able to snag one of those as well. I was on last evening but was unable to secure any additional contacts. The fun begins now as I have to search out specific calls that I need. Larry W2LJ did mention that the event can get very busy and last evening I was listening to a station (that was already in my log) and it was so busy and the pileup was crazy he had to operate split!
I will be on again this weekend to see if I can get all 13 stations and the bonus stations. Stay safe everyone and thanks very much for taking the time to stop by the blog.
Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

Amateur radio often helps out in emergencies. But hams have other lives besides what’s they’re licensed to do by the FCC under the Amateur Radio Service. One prominent ham, Dr. Scott Wright K0MD, edits the American Radio Relay League’s National Contesting Journal and contacts many, many other hams in official contests. But in his work life as a physician at the prestigious Mayo Clinic in Rochester MN, he regularly saves lives as a cardiovascular physician. But now Dr. Wright and a fellow physician and ham operator, Dr. Peter Marx of the US Food and Drug Administration (call sign AB3XC), are engaged in a much broader life-saving activity during the Covid-19 pandemic.

Convalescent plasma is the only antibody based therapy currently available for COVID-19 patients. The US Convalescent Plasma Expanded Access Program is a collaborative project between the US government and the Mayo Clinic to provide access to convalescent plasma for patients in the United States who are hospitalized with COVID-19. The study, goals and explanations for what convalescent plasma is can be found on the official website: www.uscovidplasma.org.

 If you would like to participate, please contact them at [email protected]

www.uscovidplasma.org

“My role is to organize the infrastructure, the research approach, help lead the set up of the data collection teams and the website teams while overseeing the study conduct and regulatory compliance,” said Dr. Wright. The study started in early April under the leadership of Michael Joyner, MD of the Mayo Clinic, R Scott Wright, MD of the Mayo Clinic, Peter Marks, MD, PhD and Nicole Verdun, MD of the US FDA and Arturo Casavedall, MD, PhD of Johns Hopkins University. The regulations governing the treatment of human subjects in research studies are substantial and required by law.

Peer-reviewed publications are already rolling out of this fast-paced medical team. The first safety report on 5,000 patients was published in May in the Journal of Clinical Investigation and the most recent safety report on 20,000 subjects published in the Mayo Clinic Proceedings this past week. Dr. Wright added, “The FDA will be making an announcement in a week or less about the benefit of convalescent plasma. We are working on a third publication now to submit to a major international medical journal for publication on whether the study has shown that use of convalescent plasma reduces mortality.” Dr. Peter Marks and Dr. Nicole Verdun are the leaders at the Food and Drug Administration.

The work of this study has been on top of my regular day job, and has been intense and required working daily including weekends for all of April, most of May and all of June so far.

Dr. Scott Wright, Mayo Clinic and Editor, ARRL National Contesting Journal

The ability of team members like Dr. Wright and others at the Mayo Clinic to move at this fast pace has been remarkable. Most studies of this magnitude take months to a year with planning and execution to initiate the scientific study. Dr. Wright said, “We started in less than a week. Most studies recruit 2500-5000 patients. We have recruited over 30,000 patients in 10 weeks, exceeding all expectations. We have hospitals in all 50 states and several US territories who are participating and over 8000 physician scientists who are working with us as investigators at their hospitals. We also helped manage the start up of collection of convalescent plasma by the large blood organizations like the American Red Cross and others by strategically connecting donor pools and people willing to donate with the blood collection centers. The work of this study has been on top of my regular day job, and has been intense and required working daily including weekends for all of April, most of May and all of June so far.“

Convalescent Plasma

Program participation

June 30, 2020

“Dr. Marks and I love our hobby of amateur radio. But this study draws on our professional work and our compassion for our fellow human beings. The Covid-19 pandemic has been a shell-shock for me as I’ve worked the Emergency Room at Mayo Clinic. The Convalescent Plasma Program is clearly saving lives and preventing some of the terrible outcomes of the Covid-19 virus. I’ve had to hand over some of my editor duties at the League’s National Contesting Journal to another ham operator so as to meet the expectations of both roles. Dr. Marks and I, along with our complete team including Dr. Casavedall of Johns Hopkins University and Dr. Joyner, our program leader at Mayo, are very optimistic that the intervention work in the clinical setting and the research publications that emerge from the Program will continue to make a different in the lives of all who are threatened by this deadly virus,” concluded Dr. Wright. The Amateur Radio Code beckons us to balance our hobby with our other callings. These two ham operators are living that Code daily now.

He also added for the ham radio community, “I will be the keynote speaker at the QSO Today International Ham radio Fair in early August talking about the study, its results, etc.,. and linking it to skills acquired through ham radio.” If readers are not yet familiar with the QSO Today Ham Radio Expo, please visit the website for that event. Registration is free and Scott’s Keynote Address will kick off the Expo with how amateur radio helped him take a leadership role in getting this major medical program up and running in record time. Just like amateur radio does in most emergencies. Except on a much grander scale in this case.

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Frank Howell, K4FMH, is a regular contributor to AmateurRadio.com and writes from Mississippi, USA. Contact him at [email protected].

Hello and welcome to the 354th episode of Linux in the Ham Shack. In this episode, we talk with Eric Guth, 4Z1UG, of the QSO Today podcast. With just the spark of an idea, he has created the first large-scale virtual ham fest. In a COVID-19 world where in-person events are cancelled all over the place, particularly Hamvention, Huntsville and more, this may usher in a new era of virtual ham radio gatherings. We dive into every aspect of the Expo from inception to participation to technical details. Thanks for listening and have a great week. Hope to see you at the Expo!

73 de The LHS Crew

Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

OK, this is a cheesy blog post title. But it’s true. Here’s the picture…and it leads into more important things about Field Day.

My annual Field Day plans are spotty at best due to my wedding anniversary falling near that June weekend. I’ve participated in multi-club “big” Field Day events here in Central Mississippi in previous years. But, frankly, I don’t enjoy them. I prefer a smaller event when it doesn’t conflict with our anniversary plans. This year our planned trip to the UP in Michigan was up-ended by the Covid-19 pandemic. So when my portable ops partner, Mike N5DU, invited me to come out to his farm in Raymond, MS on Saturday, that seemed perfect!

He also invited a new ham in the area, Kyle KI5JCL, to come and learn more about Field Day. Kyle works in the IT field so his “JCL” call sign suffix gave me vivid memories of the days when I worked on the Big Iron, IBM mainframes at the Triangle Universities Computation Center (TUCC) while on the faculty at NC State. (For the uninitiated, JCL was IBM’s nomenclature for Job Control Language.) Kyle checked into our club’s weekly 2 meter net which is how we got to know him. This was a chance to play Elmer to a very tech-savvy, only licensed for a month, ham in our area. While a tad nervous to jump into the pile-up held by a Western PA ham, Kyle worked on him for about 20 minutes before he heard the November Five Delta Uniform phrase coming back to him. Mike and I stood and clapped heartily for Kyle as he stayed with that big fish and finally landed him. Fine Business! The ham in PA may never know how significant he was for the calling amateur on this end of the QSO.

N5DU has a small separate building adjacent to his home for his ham shack, an almost perfect setting from my point of view. It’s in the country on a family farm acreage where there are no deed restrictions on antennas (except internal approval in the household unit, of course) and with almost no RF noise. The N5DU team used a Kenwood TS-590SG feeding an Ameritron ALS-1306 amplifier, an MFJ ATU feeding a Windom about 30′ up among trees. We also exercised a digital station, first on a Xiegu 5105 and then on an Icom 7200. The digital station fed an MFJ-2982 vertical. FT8 was the digital mode of choice. We rotated among the voice and digital stations and…well, all of the snacks and great food Mike’s XYL had on hand for us.

While we didn’t mark any achievements on the scoreboard of this “non-contest, contest” that is Field Day, the N5DU team (led by Mike, frankly) finished with 328 points over 268 contacts. We were missing our CW op, Mike K5XU as well as Thomas N5WDG on this one!

Getting a good group together to share knowledge, skills and suggestions is always a good thing. I have learned a great deal from Mike N5DU, especially on style of operating during a contest. It’s not always about points, Boom! Boom! Boom! But working with ops who are either just getting started or who just stumble across something like this Covid-19 lots-of-teams-working-separately-at-home Field Day is important too. The ARRL’s temporary rule modification to allow home stations to work each other make a notable difference on the band waterfall displays. Watch this video, especially of Mike spending a few moments (and likely losing a couple of contacts during the time where he was clipping along at a 93 contacts-per-hour pace).

It’s fairly obvious that power makes a difference. We were able to hold frequencies and work them for an hour at a time. Having a tower and beam in addition would’ve just underscored that situation. We moved from QRP on digital to upwards of 40 watts or so on the Icom 7200. In some ways, the need to “handicap” contest stations will make a huge difference in the long run for highly competitive contests. But on Field Day 2020, I was just glad to participate in a small team, learn from one another, and getting a Tee Shirt to commemorate the event. Thanks for the gift, N5DU!

Frank Howell, K4FMH, is a regular contributor to AmateurRadio.com and writes from Mississippi, USA. Contact him at [email protected].