Shortwave listening and everything radio including reviews, broadcasting, ham radio, field operation, DXing, maker kits, travel, emergency gear, events, and more
Many thanks to SWLing Post contributor, Michael Guerin, who shares this article at CNN by Dr. Don Lincoln, a senior physicist at Fermilab and researcher at the Large Hadron Collider:
Earth dodges a cosmic bullet — for now
Solar flares and related phenomena could cause tremendous damage to the Earth’s electric grids, writes Don Lincoln Read the full story
(CNN) Mother Nature has had a hectic past couple of weeks of hurricanes, an earthquake, wildfires and flooding. But while our attention has been turned to these humanitarian crises, Earth ducked a cosmic bullet the likes of which could have crippled human technological civilization.
Over the last week or so, the sun has experienced a series of solar flares, including the most energetic one in a decade. A solar flare occurs when magnetic energy in the vicinity of a sunspot is released, resulting in a bright spot on the sun that takes place over a time scale of perhaps 10 minutes — or even less.
[…]While solar flares can interfere with satellites, an even more dangerous phenomenon is called a coronal mass ejection (or CME). CMEs often accompany a flare and occur when some of the sun’s highly ionized material is ejected into space. Because a CME consists of matter and not the electromagnetic radiation of a flare, it can take a day or even more to travel from the sun to the Earth. Indeed, last week’s flares were accompanied by a CME, but it didn’t hit the Earth with its full fury.
If a CME happens to be aimed directly at Earth, the ionized particles can slam into the magnetic field that surrounds the Earth and distort its shape, a process called a geomagnetic storm. That’s when things can get dangerous. Moving magnetic fields can induce electrical currents on the Earth’s surface and damage equipment.
In 1989, a CME hit the Earth and knocked out power in Quebec and the northeast United States for nine hours. And in 1859, an enormous CME hit the Earth. Called the Carrington Event, after Richard Carrington, who observed and recorded it, this geomagnetic storm caused telegraph pylons and railroad rails to spark, shocked telegraph operators and was responsible for auroras visible at least as far south as Havana, Cuba, with some claims of auroras being observed near the Earth’s equator.
[…]A report by Lloyd’s of London in 2013 estimated that the damage to the US grid from a repeat of the Carrington Event would be in the range of $0.6-$2.3 trillion dollars and would require four to 10 years to repair.
“The total U.S. population at risk of extended power outage from a Carrington-level storm is between 20-40 million, with durations of 16 days to 1-2 years,” the Lloyd’s report said.[…]
Many thanks as well to Mike Hansgen (K8RAT) who also shares the latest space weather news from Tamitha Skov, reiterating how fortunate we were to miss this last barrage from our local star:
One additional note: I’m currently in the process of writing a lengthy article about how to protect your gear from an EMP (Electromagnetic Pulse) emanating from an event like this. In the past two weeks, I’ve had an uptick in inquiries about this, so I thought it best to consult an expert and produce a post. I’ll hopefully have this article published within a week or so. I’ll post it with the tag: EMP.
Mike Ladd, with SDRplay, has done an amazing job putting together a comprehensive series of how-to videos for those of us with the SDRplay RSP1 and RSP2 receivers. His first set of videos have focused on using SDRuno (SDRplay’s custom SDR application), and now he’s started an SDR Console series as well.
If you own an SDRplay RSP, take time to watch some or all of these videos as they’ll help you unlock RSP functionality you likely never knew existed. I’ve learned something new in each one I’ve watched.
Below, I’ve embedded 23 SDRuno how-to videos, a new SDR Console video and PDF/printable SDRplay documentation. Enjoy! (And thanks again, Mike!)
Key GOP Lawmaker: Go after North Korea with sanctions and short-wave radio
WASHINGTON — House Foreign Affairs Committee Chairman Ed Royce, R.-Calif., called Wednesday for tough new sanctions on Chinese banks that do business with North Korea. Royce also said the Stalinist regime in Pyongyang has been losing its totalitarian grip on a population increasingly getting information from short-wave radio and contraband South Korean movies.
Royce said in an interview with Yahoo News on Sirius XM POTUS Channel 124 that he had met with a top North Korean defector who played up the impact of communications from the outside world as a way to pressure the government of Kim Jong Un.
“He told me that the one thing really shaking the resolve of people across North Korea is the information that’s coming in on two short-wave [radio stations] run by defectors,” Royce said. “They’re telling people what’s really going on in North Korea and in the outside world.”
The defector, Royce recalled, said, “You should help amp that up and get that all across the country.”
Voice of America and Radio Free Asia — descendants of Cold War-era information warfare — currently broadcast 10 hours per day of short- and medium-wave radio into North Korea, according to a congressional aide. And Congress doubled their Korean-language programming for the year ending Oct. 1 to $6 million, where it will stay for the next fiscal year, the aide said.[…]
Hi there, the garden at my house is pretty small and as a consequence, I am very limited in terms of what antennas I can usefully employ. You can’t position anything further than about 10 metres from the brickwork and to compound this, we are surrounded on all sides by neighbours in close proximity. All very nice people, but all very noisy – electrically speaking lol. I simply can’t get far enough away from these sources of electrical noise to achieve excellent SNR.
The solution to my problem was ultimately a Wellbrook ALA1530 magnetic loop, but prior to that I used an end-fed random wire, the performance of which deteriorated as the months went by as the ubiquitous blanked of local QRM continued to increase. Eventually, I was forced outdoors, well away from my town – effectively catalysing my forays into the Oxfordshire countryside on DXpeditions. That first experience of listening to the radio on shortwave, in the absence of any QRM was enlightening to say the least and of course, subsequently, DXpeditions have become a mainstay of my listening activities. However, despite enjoying some great DX successes out in the woods, one has to be realistic about how often it’s possible to leave the house just to listen to the radio. This led me to the purchase of the Wellbrook ALA1530 magnetic loop. It proved to be a triumph of electrical noise mitigation and an absolute necessity in copying transatlantic medium wave signals in such a noisy and compact space. A total game-changer. The brilliant performance of the Wellbrook eventually led to me purchase a second, cheaper active antenna; the E-field Bonito Boni Whip and in turn, that purchase led me to the MegActive MA305, kindly supplied by Bonito themselves for objective testing.
Have DXing kit, will travel…everything you need in a small flight case…
You might remember my initial tests at home confirmed, as expected, that E-field antennas don’t work well in electrically noisy environments (except at LW frequencies in my experience) but outdoors, away from noise, they are superb. I have a number of reception videos on my YouTube channel – Oxford Shortwave Log which clearly demonstrate identical performance of the Bonito MegActive MA305 antenna and Wellbrook ALA1530 magnetic loop out in the woods. So, what if you’ve got a large garden in a suburban area that allows you to be just far enough from sources of electrical noise…how much of a difference does it make to the noise floor of your receiving equipment? Can E-field antennas such at the Bonito MegActive MA305 do the job? Furthermore, how well does a random wire work in a larger garden?
My MegActive MA305 antenna system for mobile DXing…and another use for a washing line…
I was fortunate enough to know someone who owns a house with a large garden, quite close to my QTH (a 10 minute walk) and who was more than willing to let me set up my DXing equipment and sit around until the early hours of the morning, listening to and recording various signals on my Eton Satellit. In preparation, I set up the Bonito MegActive MA305 antenna and hung the radiating element on the washing line – sounds ridiculous but actually worked very well, placing it about 2.5 metres above the ground. I also set up a 40 metre longwire, which at its closest point, was still approximately 25 metres from the house, and 30 metres from the neighbours. This post will focus on the performance of the MA305; a subsequent post will detail the performance of the longwire.
The large garden I ‘borrowed’ for my DXing session with the Bonito MegActive MA305 antenna
Suffice to say, the MegActive MA305 performed admirably during my first listening session. In the middle of the afternoon I copied a very strong signal from The Voice of Korea around 15:44 hrs UTC on the 25 metre broadcast band, followed at 17:10 hrs UTC with a superb signal from The Voice of the Broad Masses 2, Eritrea, on the 40 metre ham band. Later on in the evening I copied Radio Mail with excellent modulation, CHU Canada with voice announcements (almost impossible at home), Myanmar Radio with an untypically strong signal and XEPPM Radio Educación from Mexico City with a signal I would normally expect on a DXpedition-proper with a large antenna.
My conclusions to this experiment are simply that E-field antennas can work in a suburban environment, if you are able to site them far enough away from adjacent sources of electrical noise. I don’t have empirical data on this, however, I can confirm that 10 metres proximity is too close at my QTH and 30 metres is sufficiently far away at this test location. One has to assume the houses nearby are similarly equipped to mine with electrical appliances that generate electrical noise. Thus, if you’re interested in a very well-priced, compact antenna and you live in an urban or suburban environment with access to a large garden/ outdoor space, an E-field Boni Whip or MegActive MA305 might well be suitable – and you’ll have a superb portable antenna for those listening sessions away from home!
Finally, I should mention the Eton Satellit. Much-maligned in certain quarters when it was first introduced into the market, it continues to demonstrate superb DXing credentials. I won’t forget some words of wisdom from a friend of mine and fellow DXer, with more than 3 decades of experience in listening to the bands on HF. He told me that Judging from his own experience with some of the original Grundig Satellit models of the 1980s and early 90s (namely the 400, 500 and 700) he was quite sure that the Eton Satellit is a considerably better DX performer than those vintage sets, that offered great sound for casual listening to international broadcasters, but didn’t perform too convincingly on weak DX signals. The Eton Satellit has been a revelation and I’m pleased to have played a small part in turning around the rather widely held view that it was less than worthy of the Satellit branding.
Fresh out of the box, the Eton Satellit has surpassed all my expectations…
Please find embedded reception videos below and text links to the Oxford Shortwave Log YouTube channel. My next post on this subject will cover the performance of a 40 metre longwire in this large garden environment. Thank you for reading/watching/listening and I wish you all great DX!
Clint Gouveia is the author of this post and a regular contributor to the SWLing Post. Clint actively publishes videos of his shortwave radio excursions on his YouTube channel: Oxford Shortwave Log. Clint is based in Oxfordshire, England.
This morning, I received yet another positive comment about the Tivdio V-115 (a.k.a. Audiomax SRW-710S).
This little radio is widely available on Amazon and eBay for around $19.00 – 25.00 US including shipping. About as inexpensive as a radio gets. Both Troy Riedel and Tom Stiles gave it an overall positive review.
Check out some of these recent comments from Post readers:
Andrew H:
“I purchased the V-115 about a week ago, and was surprised at how much radio I received for $15 plus free shipping. The FM band is quite sensitive. AM is good for locals, but not exactly a DX machine. Shortwave was iffy, but improved once I tightened the antenna mount screw (I’m used to loose screws!). Depending on location, shortwave is better, but does get some bleed from strong AM’s in the area. The audio is amazing for something of this price. I have yet to try the recording, but, this has become my go-everywhere radio as of late.”
Egil – LA2PJ:
“The TVDIO V-115 is an amazing receiver. It was bought because I needed a small recording device for my portable SWL activities. I put a 32 GB into the slot, and found that the recordings all were of excellent quality. It also doubles as an external speaker for my FDM-DUO qrp transceiver.
I’ve only tried the radio part on 25m shortwave, and to my surprice the first station heard was from Brazil.
Not bad for a device costing less than USD 20 including p&p from China to Norway!”
JR:
“I recently purchased this TIVDIO radio. I am in Australia and it is a little beast of a machine.
I live in rural country area and seem to have no luck with the short wave radio. Everything else is great!
I have a 64gb micro SD card in it and can fit thousands of songs in it.
The screen is awesome, seems to detail everything going on even has a little spectrum analyzer at the bottom of screen.
The speaker along with the bass is outstanding considering the size and price of the unit.”
J D Bulow-Osborne:
“I bought two of the TIVDIO version radios several months ago. A 16GB TF card completed each one. They are, of course, re-chargeable, the sound, for the size, is excellent, the case finish is worthy of a more expensive item. Button lock, mp3 recording, auxiliary input, delete function, (including unwanted channels that the auto-tune has found), makes them a real bargain. They impress everyone who sees – and hears – them. OK, so there’s no clock or DAB, but for just over £12, including shipping from China(?), it would be really churlish to complain. One battery charge seems to last a very long time.”
Roger Waters:
“I own the Audiomax version of this radio. I have recorded classical music from an FM station using the Audiomax. When playing the recording on an iphone with $100 Audio Technica headpbones, the recording sounded quite good. Using the Audiomax to play recorded music off its storage card also sounds pretty good if the equalizer setting is Jazz and the headphones are expensive. While the Audiomax does not have a timer, its Auto On or Sleep function will save any recording when it turns off the radio automatically. When playing music off the storage card, the music can be listed according to artist. But the artist listing is not completely alphabetical. Radio reception for AM, FM, and SW is solid but not DX quality. When entering a frequency you have to wait about 4 seconds before the frequency changes. Also you cannot scroll to any desired frequency. The scrolling keys will skip over any frequency which does not have a significant signal. Where the Audiomax shines is that with a press of a button you can go from a boring commercial on the radio to some nice prerecorded music or podcast. For the radio alone, the Audiomax is worth its selling price.”
I agree with these assessments of the Tivdio/Audiomax. I’ve had this little radio for about a year now, but only really started using it around May of this year (this is the same radio I had forgotten that I’d purchased last year). Of course, the best feature is the function that allows you to make off-air recordings and save them to a MicroSD card–it actually works quite well. While in Canada this summer, I recorded a number of FM, MW and SW broadcasts on the Tivdio–so much easier than carrying an external recorder.
Listening to the BBC Midwinter Broadcast on June 21, 2017 in Québec.
Now if I put on my radio reviewer cap for a moment, I would have to note two issues, in particular:
Though receiver sensitivity is quite good, the AGC circuit is a little too over-active when receiving a weak signal. Last summer, for example, while listening to the BBC Midwinter broadcast in Québec (see photo above), the AGC was so unstable I simply didn’t bother making a recording. Admittedly, I was very impressed a $20 radio could even detect this signal. I found that nighttime mediumwave reception is also problematic, save for the strongest of stations.
The V-115 also seems to be quite prone to RFI indoors–more so than, say, a Tecsun PL-310ET. I suspect this is because it’s not shielded very well internally. Not an issue, if you’re listening outdoors, of course.
In truth, it’s hard to be critical of this little radio. As so many of you have echoed, for $19.00-25.00 US–? You simply can’t beat it. A great value indeed.
WASHINGTON – Libby Liu, President of Radio Free Asia (RFA), today issued the following statement about RFA’s decision to suspend in-country operations in Cambodia:
After almost 20 years of bringing the Cambodian people independent, reliable and trustworthy news and information from inside the country, Radio Free Asia has regrettably been forced to close its Phnom Penh bureau. The government’s relentless crackdown on independent voices in recent weeks has made it impossible to keep the bureau open while guaranteeing the integrity of RFA’s journalistic mission.
It has become increasingly apparent that Prime Minister Hun Sun has no intention of allowing free media to continue operating inside the country ahead of the 2018 elections. The government has instead seized on every opportunity to go after critics, political opponents, NGOs, and independent media committed to reporting the truth. Using a thin pretext of tax and administrative violations, authorities have closed independent radio stations carrying RFA, Voice of America, and Voice of Democracy. The government has forced The Cambodia Daily newspaper to close due to an extreme and punitive retroactive tax bill and has kept its manager, Mr. Steele, from leaving the country under threat of criminal charges. Authorities have been employing these same tactics against RFA, despite our full cooperation at every step to comply with all requests and our sincere efforts to register as a licensed media company. Nevertheless, they have resorted to false statements and increasingly threatening and intimidating rhetoric about RFA, made mostly through leaked documents on government mouthpiece media and random statements from different ministries.
Facing down intimidation is nothing new for RFA. Our journalists and commentators have been threatened, jailed, and forced to leave the country to avoid arrest or worse. But recent developments have intensified to an unprecedented level, as Cambodia’s ruling party shamelessly seeks to remove any obstacle or influence standing in its way of achieving absolute power.
Through the years, Cambodian journalists working for RFA have risked their lives to report on corruption, illegal logging, forced evictions, bribery, labor disputes, and rights abuses, among other important stories largely ignored by state-controlled media. Their hard work has helped to build the foundation of RFA’s investigative, in-depth journalism from the ground up and has earned us the trust of the Cambodian people — to whom we also owe our heartfelt gratitude. The sacrifice and support of staff and audience alike reinforces the need for RFA to keep Cambodia’s citizens informed, so they possess a more complete and accurate picture of what’s happening in their neighborhoods, their towns, and their villages. We hope that the government will not persecute the individual brave Cambodians who worked with us in retaliation for RFA’s efforts to bring reliable free press to their countrymen and women.
RFA stands resolved to stay true to its vital mission in Cambodia, now more than ever, to go forward shining a light even in the darkest of hours. RFA will keep reporting on the most important and censored issues and events inside the country — and we will continue to broadcast and publish our programs, reports and content on shortwave radio, social media, and on our website.
As history has shown, dictators may rise and force their will on nations, but the people will always seek truth in pursuit of freedom.
From the Isle of Music, Sept 17-23
For serious DXers only
This week includes an interview recorded under very difficult conditions. Even after editing, the interview section may be a listening challenge for some. After considerable thought, we decided to include it as a reminder of what many of us have listened through at times over the years. The music, however, will be as clear as listening conditions in your area permit.
Four opportunities to listen on shortwave:
1. For Eastern Europe but audible well beyond the target area in all directions with 100Kw, Sunday 1500-1600 UTC on SpaceLine, 9400 KHz, from Kostinbrod, Bulgaria (1800-1900 MSK)
2. For the Americas and parts of Europe, Tuesday 0000-0100 UTC on WBCQ, 7490 KHz from Monticello, ME, USA (Monday 8-9PM EDT in the US)
3 & 4. For Europe and sometimes beyond, Tuesday 1900-2000 UTC and Saturday 1200-1300 UTC on Channel 292, 6070 KHz from Rohrbach, Germany.
Put a little Salsa on it….
Episode 28 of Uncle Bill’s Melting Pot will feature some excellent Salsa bands and Charanga orchestras based in the United States. This is our first episode at our new date and time, Sunday, September 17 at 2200-2230 UTC (6:00pm-6:30pm EDT US) on WBCQ 7490 Khz
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