A nice Friday afternoon on the radio
Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].
Amateur Radio Weekly – Issue 199
Hams pitch in to help as “Hat Trick” of major storms hit Northeast
WX1BOX volunteers were active for 17 hours straight, and afterward, some continued to monitor high tides and strong winds, which persisted into the weekend. The volunteers handled more than 1,000 reports of wind damage.
ARRL
Azimuthal map
Azimuthal map with DX spot reporting.
HA8TKS
Understanding AGM batteries
Often forgotten in the mix is absorbed glass mat (AGM) batteries. They’re very adaptable for off grid use and have a lot of overlooked advantages.
Off Grid Ham
Building a filtered amplified Coketenna for ADS-B
Combine a proven, easy-to-do concept, the Coketanna, with the best performance RTL-SDR dongle for ADS-B and a filtered low-noise amplifier for great and affordable receive performance.
Radio for Everyone
Live trees affect antenna performance
Living wood absorbs EMF from vertically polarized antennas.
AmateurRadio.com
Which two-way radio service is right for you?
Choosing the right two-way radio can be confusing. You can’t just buy a couple of radios and start talking on them. Most two-way radio services require licensing of some sort, and radios designed to be used in those radio services must be certified by the FCC.
KB6NU
SpaceX launch punched huge, temporary hole in the ionosphere
Rocket launches act somewhat like a small volcano eruption.
Ars Technica
Shortwave supports secure digital communications
Taking advantage of its long-distance capabilities, the established technology has a new mission.
Radio World
China establishes single broadcaster, ‘Voice of China’
Voice of China, as the new outlet will be known internationally, will be formed by combining three mammoth state-run national networks.
CNN
Video
Women’s History Month
Women scientists that have made radio history.
ARRL
Mount Juliet Simplex Society
The Mount Juliet simplex net registers 20+ check-ins per net. Ham Nation interviews the founder of this ARRL affiliated club.
Ham Nation
Amateur Radio Weekly is curated by Cale Mooth K4HCK. Sign up free to receive ham radio's most relevant news, projects, technology and events by e-mail each week at http://www.hamweekly.com.
LHS Episode #216: The Weekender VI
Welcome to the latest Weekender edition of Linux in the Ham Shack! We're all ready for the weekend and we hope you are too. In this episode we give you some tips on special event stations and contests to participate in over the next two weekends, Linux challenges to try, some Scotch to partake of and a great fruit salad to try as well. Enjoy!
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].
Meh
No doubt you’ve seen the recent ARRL proposal to increase Technician HF privileges and the expected ensuing online debate over it. In general I’m not opposed to the proposal, however I find myself indifferent. As others have pontificated, it’s not much of a hurdle these days to upgrade to General to acquire more privileges. I was very supportive of the code test elimination and various changes over the years that have simplified licensing. However, to some extent I think we’re at a point of diminishing returns with benefits from licensing changes and privilege increases. There’s perhaps one specific area I see the ARRL-proposed changes increasing on air activity: FT8. If Techs are given HF digital privileges on lower bands, I suspect we’ll see a lot of Techs end up there, and stay there, like a lot of Techs do today with 2 meter repeaters, unfortunately. With new radio amateur recruiting, participation, and retention, where should our focus be, what are the real stumbling blocks, and where is the opportunity? It’s not privileges. In thinking about the ARRL proposal, I’m kind of left thinking, “Meh.”
We need to look where the bulk of amateur technology hobbyist activity is today. It’s the Maker movement. These are intelligent, innovative, and inquisitive people who would be a great asset in amateur radio. It’s often been said that amateur radio and its perhaps dated technology can’t compete with the Internet, Xboxes, and cell phones. That may apply to your grandkids, but with Makers it’s not an issue. Makers enjoy playing with retro technology, like Nixie tubes, for example. They like building stuff and experimenting. They also like cutting edge technology, like satellites. Amateur radio has the perfect blend of retro and modern technology, and it has the opportunity to take Makers beyond the typical Maker fare of microcontrollers, single board computers, 3D printing, and robotics. Unlike “preppers” coming into the hobby for a specific application for their own purposes, Makers will be active and contributing participants and arguably are more likely to advance the radio art, as amateur radio was intended to do. But we need to have a culture that welcomes them, on their turf, and their venues, not just ours.
The Maker movement is a potential goldmine for amateur radio, one that needs to tapped, right now. This goes beyond having an amateur radio display at a Maker Faire stocked with pamphlets. If we really want to increase participation and new licensee retention, we need to pull out all the stops and target this demographic with technology, exhibitions, publications, and venues that tie amateur radio into their curiosities, interests, and projects. We need to be seen as innovators, not preservationists or on air retirement communities. There needs to be cultural change within amateur radio. While more kilohertz for newcomers is nice, and fairly easy to implement, it’s not going to get sizable returns in participation and retention. Targeting Makers will.
This article originally appeared on Radio Artisan.
Anthony, K3NG, is a regular contributor to AmateurRadio.com.
QST Article – “Live Trees Affect Antenna Performance” – implications for #POTA #SOTA
In February 2018’s QST was a very interesting and scholarly article, the cover story actually, on the effects of live trees on the performance of both vertical and horizontal antennas. Things to ponder:
- Living wood (trees, as opposed to dry dead wood such as boards) absorbs EMF from vertically polarized antennas.
- Living wood resembles human tissue in terms of dielectric properties, so wearing your HT on your belt will greatly reduce your effective antenna power. Presumably, unless you’re a real fathead like me, talking into HT held at your face should not be too bad.
- A single vertical tree has next to no effect on horizontal antennas, such as dipoles.
- A forest, containing lots of vertical trees, is even worse than a single tree like in your backyard, so for us backpackers and hikers, we need to find a clearing when trying to use our HT’s in the woods.
- Worse, a forest will affect both vertical and horizontal antennas so when we’re operating in the field, for POTA or SOTA for example, we should look for a Goldilocks spot with enough trees to launch the, say, dipole, but not too many. Better in Winter after leaves fall, though.
This is Wayne, k4wk, http://www.hamdom.com. Thanks for listening; you’re in the log.
Wayne Robertson, K4WK, is a regular contributor to AmateurRadio.com and writes from Georgia, USA.
Hunting For NDBs In CLE 230
ZSJ - 258 courtesy: http://www.ve3gop.com/ |
This coming weekend will see another monthly CLE challenge. This time the hunting grounds will be: 240.0 - 259.9 kHz and 420.0 - 439.9 kHz.
For those unfamiliar with this monthly activity, a 'CLE' is a 'Co-ordinated Listening Event', as NDB DXers around the world focus their listening time on one small slice of the NDB spectrum.
An easy challenge in this one is to hear the Sandy Lake (ONT) NDB, 'ZSJ', on 258 kHz. At 500W and a 150' vertical, it's well-heard throughout North America. Listen for its upper-sideband CW identifier (with your receiver in the CW mode) on 258.408 kHz.
Hopefully the propagation will co-operate but the Sun has been doing some strange things once again this week, as Cycle 24 continues its downward trend.
When tuning for NDBs, put your receiver in the CW mode and listen for the NDB's CW identifier, repeated every few seconds. Listen for U.S. NDB identifiers approximately 1 kHz higher or lower than the published transmitted frequency since these beacons are modulated with a 1020 Hz tone approximately.
For example, 'AA' in Fargo transmits on 365 kHz and its upper sideband CW identifier is tuned at 366.025 kHz while its lower sideband CW ident can be tuned at 363.946 kHz. Its USB tone is actually 1025 Hz while its LSB tone is 1054 Hz.
Often, one sideband will be much stronger than the other so if you don't hear the first one, try listening on the other sideband.
Canadian NDBs normally have an USB tone only, usually very close to 400 Hz. They also have a long dash (keydown) following the CW identifier.
All NDBs heard in North America will be listed in the RNA database (updated daily) while those heard in Europe may be found in the REU database. Beacons heard outside of these regions will be found in the RWW database.
From CLE organizer Brian Keyte, G3SIA, comes the details:
Here are the brief details for our 230th Co-ordinated Listening Event.
In the last Event we used a very big frequency range - 50 kHz.
This time we have 40 kHz to search in, a wide range again, but without QRM from the DGPS beacons and relatively free of NDBs too, all giving us some 'easy listening'?
Days: Friday 23 March to Monday 26 March
Times: Start and end at midday, your LOCAL TIME
Range: 240.0 - 259.9 kHz plus 420.0 - 439.9 kHz
(BOTH ranges are for ALL listeners)
Please listen for the NDBs whose nominal frequencies are in those ranges, plus any UNIDs you hear there.
The LF range will be very challenging from most of Europe.
The HF range will be very challenging from most of North America and from Australia.
S E Asia has some in both ranges.
First-time CLE logs will also be very welcome from anyone, anywhere.
Send your final CLE log to the List, preferably as a plain text email, not in an attachment, with CLE230 and FINAL at the start of its title.
Please show on EVERY LINE of your log:
# The full Date (or Day no.) and UTC (the day changes at 00:00 UTC).
# kHz (show the beacon's nominal published frequency if you know it)
# The Call Ident.
Other optional details, Location, Distance, etc., go LATER in the same line (or in footnotes). Any extra details about UNIDs, especially strong ones that may be near to you (maybe their approximate direction, etc.) will help us to discover more about them. Please make your log useful to old and new members alike by ALWAYS including your own location and brief details of the equipment and aerial(s) that you were using.
Good listening
Brian
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From: Brian Keyte G3SIA ndbcle'at'gmail.com
Location: Surrey, SE England (CLE co-ordinator)
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If you are interested in some remote listening - maybe due to local difficulties - you could use any one remote receiver for your loggings, stating its location and with the owner’s permission if required. A remote listener may NOT also use another receiver, local or remote, to make further loggings for the same CLE.
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These listening events serve several purposes. They:
- determine, worldwide, which beacons are actually in service and on-the-air so the online database can be kept up-to-date
- determine, worldwide, which beacons are out-of-service or have gone silent since the last CLE covering this range
- will indicate the state of propagation conditions at the various participant locations
- will give you an indication of how well your LF/MF receiving system is working
- give participants a fun yet challenging activity to keep their listening skills honed
*** NEWS FLASH ***
The Yahoo ndblist Group has just been moved to Groups.io and The NDB List Group will now be found there! The very active group is a great place to learn more about the 'Art of NDB DXing' or to meet other listeners in your region. There is a lot of good information available there and new members are always very welcome. As well, you can follow the results of other CLE participants from night to night as propagation is always an active topic of discussion.
You need not be an NDB List member to participate in the CLEs and all reports, no matter how small, are of much value to the organizers.
Remember - 'First-time' logs are always VERY welcome!
Reports may be sent to the NDB List Group or e-mailed to CLE co-ordinator, Brian Keyte (G3SIA), whose address appears above. If you are a member of the group, all final results will also be e-mailed and posted there.
Please ... give the CLE a try ... then let us know what NDB's can be heard from your location! Your report can then be added to the worldwide database to help keep it up-to-date.
Have fun and good hunting!
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].
LHS Episode #215: APRS Deep Dive
Welcome to Episode 215 of Linux in the Ham Shack. In this episode, we take an in-depth look at APRS, the Automatic Packet Reporting System. This is a digital mode, frequently used on the VHF/UHF bands for propagating location information, weather data, message traffic and more from one station to another using packet TNCs and digipeaters for RF communication and I-Gates for connectivity via the Internet. Join us as we look at how you can participate in APRS using Linux and Open Source in your ham shack. Thanks for listening!
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].