Many thanks to SWLing Post contributor, Dave Zantow (N9EWO), who notes that he has posted an updated review of the ATS-25 Si4732 receiver with the 4.0 firmware revision.
Dave’s updated ATS-25 review
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CTV: “How shortwave radio is resurfacing as a tool in Ukraine”
Many thanks to SWLing Post contributor, William Lee, who shares this story from CTV which focuses on the resurgence of interest in shortwave radio following the Russian invasion of Ukraine.
This item features our good friend, John Figliozzi; author of the Worldwide Listening Guide:
How shortwave radio is resurfacing as a tool in Ukraine (CTV)
In a world of mobile phones, satellites and the internet, some old school technology is making a major comeback. The shortwave radio, used by spies for decades to send encrypted messages, is being resurrected for the war in Ukraine.
According to Dr. Andrew Hammond, curator and historian at Washington, D.C.’s International Spy Museum, the shortwave radio “is a classic tool that was used for espionage.
“With a shortwave radio like this, you can transmit information over huge distances,” he told CTV National News.
But now, decades later, shortwave is coming back into use. [Continue reading…]
Jock gets a good grounding!
Many thanks to SWLing Post contributor, Jock Elliott, who shares the following guest post:
Getting grounded – at last!
By Jock Elliott, KB2GOM
Readers’ comments are among the best things about writing for the SWLing.com blog. When a reader responds to a post and leaves a comment, it does three things. First, it lets the author know that someone actually read the post. Second, it provides valuable feedback – “I liked it.” “Did you know about this . . .?” “I had a similar experience.” – and so forth. Finally, it provides the author an opportunity to learn something, and that perhaps is the most fun.
A case in point: when I posted this, Andrew (grayhat) said:
“If you want to make an experiment, connect the end-fed to the Satellit high-Z wire input (clamp), then pick a (relatively short) run of insulated wire connect one end of the wire to the high-Z “ground” (clamp) and the other end of that wire to the “gnd” hole in the wall plug
The above being said, I prefer keeping antennas outside and taking care of the feedline, this helps reducing or eliminating noise from indoor appliances like switching PSUs and other things, anyway, if you want, try the above idea and let me know how it works for you”
To which, I responded:
“Thanks for the comments.
Thanks to a tree falling on the powerlines, I now know that the inherent electrical noise in my radio room is basically down to the level of atmospheric noise.
Neverthless, experimenting with a ground is definitely worth trying. A thin wire, sneaked out the window to a ground rod, might do the trick. I’ll report back after I try.”
Andrew (grayhat) came back to me and said:
“I was serious, try the “wall plug ground” I described, it won’t start any “magic smoke” or the like, otherwise, if you can lay out a wire with a length of 5m max, cut to be NON resonant, and connected to a good ground stake, go for it
Then, if you want to discuss this further, just ask Thomas for my e-mail, I agree to share it with you.”
Now, I really appreciated Andrew’s comments, but what I had not told him was that there is just one wall plug in my radio shack; it is really inaccessible, and I am not sure I can get a ground off it. Further, the rest of the power “system” in my shack is a rat’s nest of power bars and extensions, and I have zero confidence that any of them will provide a useful ground.
But – and this is a big but – I did take Andrew’s point: that connecting an actual ground to the ground clip on the back of the Satellit 800 might improve things. Continue reading
2022 W9IMS Special Event Station Details!
W9IMS Special Event No. 1: The 2022 Certificate Chase Begins
By Brian D. Smith, W9IND
A journey of a thousand miles begins with a single step, as the proverb goes, and the road to a 2022 W9IMS Checkered Flag Award begins with a single QSO – or a single SWL reception.
W9IMS will stage special event stations commemorating each of the three major races at the Indianapolis Motor Speedway this year: the Grand Prix, the Indianapolis 500 and the NASCAR 200 at the Brickyard.
Your weeklong opportunity to complete the first of three required contacts with W9IMS starts Sunday, May 8, and ends at 11:59 p.m. Saturday, May 14 (0359 UTC Sunday, May 15). The special event schedule will resume only 8 days later with the Indy 500 operation (May 23-29), followed by the NASCAR 200 from July 25-31.
Individual QSL cards accompany each of the three events, and a Checkered Flag certificate awaits those who bag the trio. Hams and SWLs alike may apply for the cards and certificate; see www.w9ims.org for further information.
Where to find W9IMS? The station fires up on 20- and 40-meter General Class frequencies, usually on or near 14.245 and 7.245 MHz. But the easiest way to locate W9IMS is to check DX spots, especially on DX Summit at http://www.dxsummit.fi/
Type “W9IMS” in the search box at upper right and you’ll see which, if any, frequencies the station is currently occupying. Note that special event operations are not continuous throughout the week, but you’ll find scheduled times and operators on the W9IMS QRZ page – and there’s always the possibility of unscheduled appearances by operators with an hour or two to spare.
Any hour of the day or night is fair game, but the surest way to catch W9IMS is during prime time: weekdays from 6 to 10 p.m. Indy time or 2200 to 0200 UTC. And if all else fails, listen for happy hour – the last blast on Race Day (May 14 for the Grand Prix), usually starting at 11 p.m. Indy time or 0300 UTC. That’s when W9IMS ops traditionally switch to contest-style QSOs, exchanging only signal reports, to put as many stations in the log as possible.
Don’t stake your certificate on any announced schedule, however; W9IMS on-air times can be curtailed by adverse solar or weather conditions or a paucity of QSOs.
Likewise, the station has been known to activate an unannounced band, such as 80 meters, at the drop of a hat. Again, DX Summit and other DX spotting networks are your best friend in this regard.
Feel free to submit all of your 2022 QSL and certificate requests in the same envelope, and if you don’t have a QSL card, a printout of your W9IMS contacts or reception reports will suffice.
DXer’s Diary on KTWR
Many thanks to SWLing Post contributor, Arun Kumar Narasimhan, who writes:
Dear Friends and fellow Dxers,
I am Arun Kumar Narasimhan, the Producer and Presenter of DXERS DIARY programme in KTWR. An update about the programme, the 5-minute programme is broadcast every Sunday from 10.26 hrs UTC in 15200 khz DRM Mode. I provide QSL cards to all those who send me their reception reports. The reception reports, band scans and listeners logs can be emailed to [email protected]. This programme has been on air from January 6, 2021.
Many thanks for the announcement, Arun!
Radio Waves: DRM Part of BBC Story, Antennas and Smith Charts, Shortwave “Hot Debate,” Carrington Event, and “Deep Freeze”
Radio Waves: Stories Making Waves in the World of Radio
Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Enjoy!
DRM Is Part of the BBC World Service Story (Radio World)
The iconic broadcaster has been supportive of the standard for over 20 years
The author is chairman of the DRM Consortium. Her commentaries appear regularly at radioworld.com.
Our old friend James Careless studiously ignores DRM once more in his well-researched, but to our minds incomplete article “BBC World Service Turns 90” in the March 30 issue.
As an ex-BBC senior manager, I would like to complete the story now that the hectic NAB Show is over.
Having lived through and experienced at close quarters the decision to reduce the BBC shortwave about 20 years ago, I can confirm that the BBC World Service decision to cut back on its shortwave footprint — especially in North America, where reliable, easy-to-receive daily broadcasts ceased — has generated much listener unhappiness over the years.
In hindsight, the decision was probably right, especially in view of the many rebroadcasting deals with public FM and medium-wave stations in the U.S. (and later other parts of the world like Africa and Europe) that would carry news and programs of interest to the wide public.
But BBC World Service in its long history never underestimated the great advantages of shortwave: wide coverage, excellent audio in some important and populous key BBC markets (like Nigeria) and the anonymity of shortwave, an essential attribute in countries with undemocratic regimes.
BBC World Service still enjoys today about 40 million listeners worldwide nowadays. [Continue reading…]
The Magic of Antennas (Nuts & Volts)
If you really want to know what makes any wireless application work, it is the antenna. Most people working with wireless — radio to those of you who prefer that term — tend to take antennas for granted. It is just something you have to add on to a wireless application at the last minute. Well, boy, do I have news for you. Without a good antenna, radio just doesn’t work too well. In this age of store/online-bought shortwave receivers, scanners, and amateur radio transceivers, your main job in getting your money’s worth out of these high-ticket purchases is to invest a little bit more and put up a really good antenna. In this article, I want to summarize some of the most common types and make you aware of what an antenna really is and how it works.
TRANSDUCER TO THE ETHER
In every wireless application, there is a transmitter and a receiver. They communicate via free space or what is often called the ether. At the transmitter, a radio signal is developed and then amplified to a specific power level. Then it is connected to an antenna. The antenna is the physical “thing” that converts the voltage from the transmitter into a radio signal. The radio signal is launched from the antenna toward the receiver.
A radio signal is the combination of a magnetic field and an electric field. Recall that a magnetic field is generated any time a current flows in a conductor. It is that invisible force field that can attract metal objects and cause compass needles to move. An electric field is another type of invisible force field that appears between conductors across which a voltage is applied. You have experienced an electric field if you have ever built up a charge by shuffling your feet across a carpet then touching something metal … zaaapp. A charged capacitor encloses an electric field between its plates.
Anyway, a radio wave is just a combination of the electric and magnetic fields at a right angle to one another. We call this an electromagnetic wave. This is what the antenna produces. It translates the voltage of the signal to be transmitted into these fields. The pair of fields are launched into space by the antenna, at which time they propagate at the speed of light through space (300,000,000 meters per second or about 186,000 miles per second). The two fields hang together and in effect, support and regenerate one another along the way. [Continue reading…]
Smith Chart Fundamentals (Nuts & Volts)
The Smith Chart is one of the most useful tools in radio communications, but it is often misunderstood. The purpose of this article is to introduce you to the basics of the Smith Chart. After reading this, you will have a better understanding of impedance matching and VSWR — common parameters in a radio station.
THE INVENTOR
The Smith Chart was invented by Phillip Smith, who was born in Lexington, MA on April 29, 1905. Smith attended Tufts College and was an active amateur radio operator with the callsign 1ANB. In 1928, he joined Bell Labs, where he became involved in the design of antennas for commercial AM broadcasting. Although Smith did a great deal of work with antennas, his expertise and passion focused on transmission lines. He relished the problem of matching the transmission line to the antenna; a component he considered matched the line to space. Continue reading
Diving into the KBIN again
Hi SWLing Post community, this is Fastradioburst23 calling to let you know of another opportunity to dive into the KBIN.
Our next bargain transmission of quality recycled radio is on Sunday 8th May 2022 at 1800 EST/2200 UTC on 9395 kHz via WRMI. Expect some great value for money as usual with free sample packs from KSOL and KDUB for the first thirty listeners through the shortwave supermarket doors*.
*Offer valid while stocks last. Usual terms and conditions apply.