Many thanks to SWLing Post contributor, Dan Van Hoy, who shares a link to this blog regarding the new Lego Retro Radio:
LEGO’s buildable Retro Radio actually plays music thanks to a sound brick
Thank you, Dan! I’m mighty tempted to put in an order for this radio!
Lego also has a page with more information here: https://www.lego.com/en-us/product/retro-radio-10334
Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers. To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Dennis Dura, Troy Riedel, Dan Van Hoy, and the Southgate ARC for the following tips:
Had the pandemic not upended many of this summer’s fun and games, many of my friends would have made a trip to the MCH hacker camp in the Netherlands earlier this month. I had an idea for a game for the event, a friend and I were going to secrete a set of those low-power FM transmitters as numbers stations around the camp for players to find and solve the numerical puzzles they would transmit. I even bought a few cheap FM transmitter modules from China for evaluation, and had some fun sending a chiptune Rick Astley across a housing estate in Northamptonshire.
To me as someone who grew up with FM radio and whose teen years played out to the sounds of BBC Radio 1 FM it made absolute sense to do a puzzle in this way, but it was my personal reminder of advancing years to find that some of my friends differed on the matter. Sure, they thought it was a great idea, but they gently reminded me that the kids don’t listen to any sort of conventional broadcast radio these days, instead they stream their music, so very few of them would have the means for listening to my numbers stations. Even for me it’s something I only use for BBC Radio 4 in the car, and to traverse the remainder of the FM dial is to hear a selection of easy listening, oldies, and classical music. It’s becoming an older person’s medium, and it’s inevitable that like AM before it, it will eventually wane.
There are two angles to this that might detain the casual hacker; first what it will mean from a broadcasting and radio spectrum perspective, and then how it is already influencing some of our projects. [Continue reading…]
Strange behavior caught by two radio observatories may send theorists back to the drawing board.
Fourteen years ago, the first fast radio burst (FRB) was discovered. By now, many hundreds of these energetic, millisecond-duration bursts from deep space have been detected (most of them by the CHIME radio observatory in British Columbia, Canada), but astronomers still struggle to explain their enigmatic properties. A new publication in this week’s Nature “adds a new piece to the puzzle,” says Victoria Kaspi (McGill University, Canada). “In this field of research, surprising twists are almost as common as new results.”
Most astronomers agree that FRBs are probably explosions on the surfaces of highly magnetized neutron stars (so-called magnetars). But it’s unclear why most FRBs appear to be one-off events, while others flare repeatedly. In some cases, these repeating bursts show signs of periodicity, and scientists had come up with an attractive model to explain this behavior, involving stellar winds in binary systems.
However, new observations by European radio telescopes may rule out this model.
Astronomers knew that FRB 20180916B, located in a galaxy some 475 million light-years away, produces multiple bursts about every 16 days, during a ‘window’ that lasts for a few days. “The idea was that the magnetar is part of a binary system with a 16.29-day period,” says Inés Pastor-Marazuela (University of Amsterdam), the first author of the new paper. If the companion star had a thick stellar wind that absorbs radio waves, the bursts would only be visible when the magnetar was on ‘our’ side of the orbit, she explains. [Continue reading…]
Iceland’s IRA reports on August 24 Karl Georg Karlsson TF3CZ connected a new receiver over the internet covering 24-1800 MHz
A translation of the IRA post reads:
QTH is Perlan in Öskjuhlíð in Reykjavík. These are Airspy R2 SDR receivers for 24-1800 MHz (on VHF and UHF). The antenna is a Diamond D-190.
Karl Georg stated the following on FB:
The extension is not just for 2m, it can only be on one band at a time. So if one user switches, others who are connected also move between bands. (However, you can listen to each frequency within the same band). The receiver automatically tunes to APRS QRG 144.800 MHz, see the APRS website: http://SDR.ekkert.org/map
URL of the receiver
http://perlan.utvarp.com/#freq=24890000,mod=usb,sql=-150
Thanks to Karl Georg for his valuable contribution. This is an important addition for radio amateurs who experiment in these frequency ranges, as well as listeners and anyone interested in the spread of radio waves.
IRA Board
Source Iceland’s national amateur radio society, the IRA
https://tinyurl.com/IcelandIRA
The nearly 2000 foot tower utilized by Cumulus Media Alternative “Alt 92.3” WZRH LaPlace and iHeartMedia Variety Hits “104.1 The Spot” KVDU Houma LA was toppled by the winds of Hurricane Ida.
The 1999 foot structure was constructed in 1988 to host both signals. Only the bottom 150 to 200 feet remain standing. Both stations are licensed to operate with 100kW/591m, but have low powered auxiliary sites in downtown New Orleans. WZRH is located on the roof of Place St. Charles with 630w/200m. KVDU is on the Hancock Whitney Center with 1.2kW/220m.
In addition to KVDU, iHeartMedia Gospel 940 WYLD is silent at its cluster. The company reports that the remainder of its signals are now operational after all but 93.3 KQUE and 98.5 WYLD-FM were off the air on Monday.
Cumulus Media states that its entire cluster of WZRH, Adult R&B 102.9 KMEZ Belle Chasse, Country “106.1 Nash-FM” WRKN Picayune MS, and Hot AC “106.7 The Krewe” KKND Port Sulphur LA are off the air. [Continue reading…]
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Many thanks to SWLing Post contributor, Dan Van Hoy (VR2HF), who notes that he spotted a number of radios including the Kenwood TS-930S in the new Netflix series, Sweet Tooth (see above). He writes:
[Also] seen in the last minutes of the final episode of season one: An AWA (Amalgamated Wireless Australasia) Teleradio Model 110H HF SSB transceiver.
Interesting history about AWA:
[Also spotted] test equipment plus all kinds of other gadgets in the zoo sanctuary.
Very cool–thank you for sharing this, Dan! That Teleradio Model 110 looks like a fascinating set! I’ve never seen one before.
Many thanks to SWLing Post contributor, Dan Van Hoy (VR2HF), who shares the following guest post:
by Dan Van Hoy (VR2HF)
I’ve recently had a lot of fun learning about the current batch of ham satellites and operating through some of them for the past several months with only a Diamond discone (and a short run of RG-213 double-shielded coax), Yaesu FT-817 (for SSB/CW) and TYT TH-9800 for FM satellites (more power, Scotty!). This simple set-up has yielded hours and hours of great fun. The last time I did satellite work was in the ’70s making contacts from my car through Oscar 6. If I had a car here in Hong Kong I might try it again!
Here’s my living room TV tray and sofa shortwave and satellite station (no XYL in house at the moment).
One of the recent highlights for both newcomers to satellite operations and old-timers was working the International Space Station’s (ISS) new FM repeater which came on the air in early September. It is a specially modified Kenwood D710-GA VHF/UHF transceiver. Unfortunately, it was only operational for about a month. For the past several weeks it has been used mostly in APRS mode.
The ARISS FM repeater runs five watts and sounds just like a regular terrestrial repeater in many ways. You can work it with any dual-band VHF/UHF FM rig and the right antenna. Full-duplex is not required, but it helps. Lower power requires some kind of gain antenna, but receiving can be done with simple antennas.
The ARISS organization just updated the schedule for the ARISS operation with this announcement:
“Next mode change (cross band repeater) targeting early December.”
YEAH! What a nice Christmas present!
Here’s a link to the full ARISS information page:
https://www.ariss.org/current-status-of-iss-stations.html
Here’s a Youtube video of one of my ARISS contacts with E21EJC. It was right after he came back from his DXpedition hauling microwave gear and dishes out to the Thai countryside to work the QO-100 geosynchronous satellite. I tell him “welcome home and have a good rest.” Kob really is “Mr Satellite!” He has posted hundreds of Youtube videos of satellite contacts.
In addition, here is video of their HS0AJ/P special “portable” station antennas for QO-100. 10 GHz RX dish (downlink) and 2.4 GHz TX dish (the big one). I listened to Kob and his friend make several QSOs via the QO-100 WebSDR:
Amazing the things we hams do just to spray some RF in the right direction!
Presently, AO-91 is probably the most popular FM satellite, along with SO-50, AO-27 and PO-101. RS-44, a linear satellite for SSB and CW, is far and away the most popular for those modes. RS-44 is in a higher orbit providing less Doppler shift and longer contact times per pass. You can easily see from the Amsat status page which satellites are in operation and which are the most popular. Many of the ham satellites do not provide two-way communication capability, but still have beacons (CW and data) that can be heard (those are in YELLOW on the Amsat status page). Everyone with a ham callsign can contribute by by uploading a reception report of the satellites you hear or work.
Full-duplex on SSB/CW satellite work is very desirable but not mandatory. I have learned you can make contacts without it coupled with a little skill and some luck. Staying near the center of the satellite’s particular passband is helpful. Sadly, there are few full-duplex rigs available these days. One of the best may be the Yaesu FT-847 which can be found on the used market. Some satellite ops are using SDRs for RX and a ham rig for TX to achieve full-duplex. I’m going to try that soon using two Diamond discones and vertical separation.
For current status of all ham satellites and ARISS operation, go here:
https://www.amsat.org/status/index.php
For tracking the ham sats and ISS, I like the Heavens-Above app (or Webpage: https://heavens-above.com/). The Pro version of Heavens Above is worth every penny. In the app, I put only the active satellites I am interested in in the search box. That way all the remaining unusable satellites will be ignored. Heavens-Above also lists the satellite operating frequencies for a quick reference.
One cool side note. With Heavens-Above, you can also see when ISS visible passes are available over your area (almost always near sunrise/sunset). Look for the passes with a magnitude greater than -3.0. If you have clear skies or a thin layer of clouds it’s quite a treat to see the ISS zoom overhead at 17, 000 miles per hour. When the ARISS repeater is operating, you can see and hear the ISS! The screen shot above is a visible pass at -3.9 magnitude, as bright as Venus.
I have found my Diamond discone to work quite well for satellite operation. It’s probably the cheapest, simplest and most effective antenna you can use for this application If you really get interested in satellite work you can always spend the big bucks for AZ/EL rotators and beams as well as the software to run it all including tuning your rig to compensate for Doppler shift. Or you can buy quite expensive omni-directional antennas designed specifically for satellite use. So far, the KISS approach has worked well for me.
Finally, we can all get a taste of the future now by listening to the only ham radio geosynchronous satellite currently in operation, QO-100. It is centered on Europe and covers about 1/3 of the earth from Brazil to parts of Asia.
It was a thrill for me to listen (via the WebSDR listed below) to one of my new satellite colleagues, Mr Kob, E21EJC, who I call “Mr Satellite,” work Brazil and many other stations in the EU, the Middle-east and elsewhere through QO-100 during a special event operation from Thailand.
Anybody can listen to activity on QO-100 at the link below. When you get there just find the CLICK TO START SOUND! button. Then, click UNDER one of the signals in the waterfall and tune with the controls below. Weekends and holidays seem to be the best time to listen.
https://eshail.batc.org.uk/nb/
Because both the uplink and downlink frequencies are way up in the microwave bands, it’s not easy to get on QO-100, but, it appears to me, worth the effort. Maybe one day we will have two more QO-100-like birds linked together to cover the whole earth for 24/7 communication anywhere in the world. One can dream.
Full details about the QO-100 geosynchronous satellite can be found here:
https://amsat-uk.org/satellites/geo/eshail-2/
When the propagation is bad, or actually anytime, ham satellites are a wonderful alternative to HF for having fun on the air.
Sorry, gotta go, RS-44 is just about here. CQ satellite, CQ satellite, de VR2HF…
Thank you so much for the satellite overview, Dan!
You’ve inspired me to get out of my comfort zone and try a little satellite work! The perfect project to do with my two daughters. I’m such a “below 30MHz” guy, I have to remind myself that there are actually some pretty amazing things you can do further up the band! When I purchase a discone antenna, I’m going to accuse you of being an enabler. Fair warning.
SWLing Post readers: Anyone else here tune to and track satellites? Please comment!
Many thanks to SWLing Post contributor, Dan Van Hoy (VR2HF), who writes:
It was one of the most sublime moments in my 55+ years in radio. Almost every night I listen to shortwave station, KNLS in Anchor Point, Alaska, from my home in Hong Kong. KNLS broadcasts to Asia and the Pacific in English, Russian and Mandarin. The English broadcast is an amazing mix of secular and Christian music and topics, science, current affairs and more. It has something for both the seeker and the saint and is one of the most informative and entertaining shows on radio.
On this particular Monday evening, August 3, 2020, I tuned in late to the English broadcast from KNLS at 1000 UTC, but went on to listen to the remainder of the show. To my complete surprise as the show closed I heard “73 de K9ZDK” in Morse code and quickly wrote down that callsign. I assumed it was the engineer on duty, obviously a ham, having a little on-air fun with a big transmitter and antenna.
A few minutes later, I also heard “CQ de K9ZDK” at the beginning of the Russian program at 1100 UTC. So, I looked up K9ZDK on QRZ.com and found it was Zavier, a young ham who had become a silent key in June of 2019.
Zavier Klingensmith (K9ZDK) Silent Key
A little more online sleuthing and a phone call later revealed that his father, Thomas, KL0K, was at the controls of KNLS that night sending Zavier’s final CQ and 73 on this planet with at least 1 million watts of power (ERP: 100KW TX + 10dBd TCI curtain array) all around Asia and the Pacific. His call on CW was heard on every English, Russian and Mandarin show that evening over 16 hours of broadcasts (two Continental 100 KW transmitters). Wow!
In Zavier’s memory, Thomas has created a DIY kit for an Iambic Keyer and is offering it for FREE (though you might want to send some $$ for his production and mailing costs…my suggestion) to anyone who asks. Details can be found at Thomas’, KL0K, QRZ page. Maybe one of the first things you can send when your keyer is completed is,”K9ZDK de YOUR CALL, 73 OM!”
Thomas, our thoughts and prayers go out to you and your family. Thanks for the amazing on-air tribute to Zavier. I suspect he was listening with a big, big smile!
Dan VR2HF, Hong Kong
(K7DAN, USA)
Radio Waves: Stories Making Waves in the World of RadioBecause I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers. To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
Many thanks to SWLing Post contributors Jeb, Dennis Dura, and Dan Van Hoy for the following tips:
n their latest Share Of Ear study, Edison Research notes that over 55% of 13-24 year-olds listen to AM/FM radio daily.
However the study notes that these Gen Z listeners spend 50% less of their total share of time listening to AM/FM radio than the average 13+ population meaning they spend less time with radio than older generations. They also mostly listen to AM/FM in the car with 50% of their listening coming in vehicles. The study also notes that these 13-24 year-olds use a radio receiver 50% less than the average 13+ population, and they use their phones for listening 75% more than the average 13+ population with 58% more of their total share of time listening to streaming audio than the average 13+ population. Their share of YouTube listening, which is surveyed only for music and music videos, is 98% higher than the average 13+ population.
The study also notes that 89% of their listening to AM/FM is done through a traditional radio and only eleven percent coming from streaming of broadcast brands.[…]
Before the dawn of broadcasting, women were frequently hired as wireless operators, and so it was not a surprise that women’s voices were heard as announcers and program hosts in the early days of broadcast radio.
Sybil Herrold was perhaps the world’s first disc jockey; she played Victrola records on her husband Charles Herrold’s experimental station, which broadcast in San Jose from 1912 to 1917.
In Boston, Eunice Randall’s voice was heard on a variety of programs over AMRAD station 1XE (which became WGI in 1922). In New York City, WOR audiences regularly heard Jesse Koewing, who was identified on the air only as “J.E.K.” while Betty Lutz was the popular “hostess” heard on WEAF.
At WAHG (now WCBS), 16-year-old Nancy Clancy was billed as the country’s youngest announcer.[…]
Carlos Henrique Latuff de Sousa or simply “Carlos Latuff”, for friends, (born in Rio de Janeiro, November 30, 1968) is a famous Brazilian cartoonist and political activist. Latuff began his career as an illustrator in 1989 at a small advertising agency in downtown Rio de Janeiro. He became a cartoonist after publishing his first cartoon in a newsletter of the Stevadores Union in 1990 and continues to work for the trade union press to this day.
With the advent of the Internet, Latuff began his artistic activism, producing copyleft designs for the Zapatista movement. After a trip to the occupied territories of the West Bank in 1999, he became a sympathizer for the Palestinian cause in the context of the Israeli-Palestinian conflict and devoted much of his work to it. He became an anti-Zionist during this trip and today helps spread anti-Zionist ideals.
His page of Instagram (https://www.instagram.com/carloslatuff/) currently has more than 50 thousand followers, where of course, you can see his work as a cartoonist and also shows his passion on the radio.[…]
As the pandemic drags on, it’s time to return to a slower, older technology, one that frees you from the unending sameness served up by algorithms.
Quarantine has slowed everything down so much that it almost feels like we’re going back in time. The first few weeks were measured in sourdough starter, then in seeds sprouting from patches planted in backyards or squeezed into space on windowsills. Things are quieter now, but maybe too quiet.
Commutes used to be accompanied by music and podcasts piped in through earphones or car speakers. This casual sensory stimulation seems disposable, but it’s one of many small pleasures that have slipped away nearly—but not quite—unnoticed.
That’s why it’s time to return to a slower, older technology that can provide auditory companionship and match the new pace of your days: the radio.
Radios, more affordable and portable than TVs, used to be household staples and a more intimate part of people’s days—a companion in the bath or during a solitary drive or walk. Now they’re mostly found in go bags and as vehicle infotainment center afterthoughts.[…]
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SCAN Testbed (Source: NASA)
Many thanks to SWLing Post contributor Dan (VR2HF) who writes:
“This looks like the world’s most expensive SDR to me. And a little mysterious. Like quantum computing!”
(Source: NASA)
Space Communications and Navigation (SCAN) Testbed
The SCAN Testbed, formerly known as Communications, Navigation, and Networking reConfigurable Testbed (CoNNeCT), served as a test facility for NASA research on radio communications and the Global Positioning System (GPS).
SCAN Testbed on International Space Station (Source: NASA)
The SCAN Testbed was launched on July 20, 2012 on a Japanese H-IIB Transfer Vehicle and installed in the International Space Station to provide an on-orbit, adaptable software-defined radio (SDR) facility with corresponding ground and operational systems. This permitted mission operators to remotely change the functionality of radio communications through software once deployed to space, offering them flexibility to adapt to new science opportunities and recover from anomalies within the science payload or communication system.
The SCAN Testbed payload was used to conduct a variety of experiments with the goal of further advancing other technologies, reducing risks on other space missions, and enabling future mission capabilities.
After seven successful years, and more than 4,200 hours of testing, it was decommissioned June 3, 2019 as it burned up in the trunk of SpaceX CRS-17 upon reentry into Earth’s atmosphere.
To learn more:
Communications Testbed Leaves Legacy of Pioneering Technology
2019 Space Technology Hall of Fame: Ka-Band Software-Defined Radio (SDR)/Harris AppSTAR™ Architecture
NASA’s Space Communications Testbed
Unique Testbed Soon will be in Space
SCAN Testbed Celebrates One Year Anniversary
Glenn Research Center SCAN Testbed
Thank you for sharing this, Dan! I had never heard of the SCAN testbed. I can only imagine what it might have been capable of accomplishing from orbit. I dare say there are even more powerful SDRs orbiting the planet at this moment!
