Shortwave listening and everything radio including reviews, broadcasting, ham radio, field operation, DXing, maker kits, travel, emergency gear, events, and more
Like a few of us contributors here on the SWLing Post, Robert Gulley (AK3Q), writes features for The Spectrum Monitor magazine (TSM). Robert and I are both passionate supports of TSM–for a mere $24 per year, you get a monthly digital magazine that is simply chock-full of articles covering all aspects of our radio hobby. A phenomenal value indeed!
I’ve just discovered that Robert has published a number of his past TSM articles–reviews and how-tos–on his excellent blog All Things Radio. Each article can be downloaded as a PDF. Here are the topics:
Using Weak Signal Software to Reach for the Sky! (Part 1)
Using Weak Signal Modes for Propagation, RFI, and Antenna Analysis (Part 2)
Thank you, Robert, for sharing these excellent articles with everyone! And many thanks to TSM for allowing its writers second publication rights. Click here to subscribe to The Spectrum Monitor.
TX Factor experiences what it’s like to be young again with a visit to this Year’s YOTA activity week at Gilwell Park in London. Bob and Pete meet the team behind the event and chat to the young people attending from 15 countries that made this year’s event so successful.
We tempt you with not one but two prizes in our next free-to-enter draw. There’s a copy of the 2018 RSGB Year Book and a Surecom SF-401 Plus Hand-held Frequency Counter from ML&S to win. Good luck!
And, if you’ve ever fancied a go at moon bounce or EME, then see how Bob and a team of amateurs get on when they’re let loose on a 32 metre dish at Goonhilly Earth Station in Cornwall.
Click here to view Episode 18 on TX Factor’s website, or click here to watch on YouTube.
Thanks for yet another excellent and informative episode, TX Factor!
CQ MF/LF Editor John Langridge, KB5NJD/WG2XIQ, reports that the FCC has authorized amateur radio use of the 630 and 2200-meter bands, effective October 16, 2017, providing registration procedures have been followed and no objections are received within 30 days.
The PLC (Power Line Communications) database is live and hams may begin registering immediately. They may begin operating on 472 kHz (630 meters) and 137 kHz (2200 meters) as early as October 16 if they register today and receive no objection in the next 30 days. Hams may not operate on the bands without going through this process.
John is asking all amateurs to register, even if they don’t plan to use these bands in the near future, as the FCC rules prohibit UTC (the Utilities Technology Council) from deploying PLC in these bands closer than 1 kilometer from registered stations. Registration now will protect your ability to use our new MF/LF bands in the future.
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.[…]
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.
